diff --git a/common/taskana-common-data/src/main/resources/sql/test-data/workbasket.sql b/common/taskana-common-data/src/main/resources/sql/test-data/workbasket.sql
index 5b9e392c7..a2c770860 100644
--- a/common/taskana-common-data/src/main/resources/sql/test-data/workbasket.sql
+++ b/common/taskana-common-data/src/main/resources/sql/test-data/workbasket.sql
@@ -17,6 +17,7 @@ INSERT INTO WORKBASKET VALUES ('WBI:100000000000000000000000000000000012', 'GPK_
 INSERT INTO WORKBASKET VALUES ('WBI:100000000000000000000000000000000013', 'GPK_B_KSC_2', RELATIVE_DATE(0)     , RELATIVE_DATE(0)     , 'Gruppenpostkorb KSC B2'   , 'DOMAIN_B', 'GROUP'   , 'Gruppenpostkorb KSC 2'      , ''           , ''       , ''        , ''       , ''        , ''            , ''         , ''         , ''         , false                );
 INSERT INTO WORKBASKET VALUES ('WBI:100000000000000000000000000000000014', 'USER-B-1'   , RELATIVE_DATE(0)     , RELATIVE_DATE(0)     , 'PPK User 1 KSC 1 Domain B', 'DOMAIN_B', 'PERSONAL', 'PPK User 1 KSC 1 Domain B'  , ''           , ''       , 'custom20', ''       , 'custom4' , ''            , ''         , ''         , ''         , false                );
 INSERT INTO WORKBASKET VALUES ('WBI:100000000000000000000000000000000015', 'USER-B-2'   , RELATIVE_DATE(0)     , RELATIVE_DATE(0)     , 'PPK User 2 KSC 1 Domain B', 'DOMAIN_B', 'PERSONAL', 'PPK User 1 KSC 1 Domain B'  , 'user-1-2'   , 'ABCABC' , 'cust2'   , 'cust3'  , 'cust4'   , 'orgl1'       , 'orgl2'    , 'orgl3'    , 'orgl4'    , false                );
+INSERT INTO WORKBASKET VALUES ('WBI:100000000000000000000000000000000016', 'MASSNAHMEN' , RELATIVE_DATE(0)     , RELATIVE_DATE(0)     , 'TPK Maßnahmen'            , 'DOMAIN_B', 'TOPIC'   , 'TPK Maßnahmen'              , ''           , ''       , ''        , ''       , ''        , ''            , ''         , ''         , ''         , false                );
 
 -- Workbaskets for sorting test
 INSERT INTO WORKBASKET VALUES ('WBI:000000000000000000000000000000000900', 'sort001'    , RELATIVE_DATE(0)     , RELATIVE_DATE(0)     , 'basxet0'                  , 'DOMAIN_A', 'TOPIC'   , 'Lorem ipsum dolor sit amet.', 'user-1-3'   , ''       , ''        , ''       , ''        , ''            , ''         , ''         , ''         , false                );
diff --git a/common/taskana-common/src/main/java/pro/taskana/common/api/BaseQuery.java b/common/taskana-common/src/main/java/pro/taskana/common/api/BaseQuery.java
index 389ae11c1..3eb515fa1 100644
--- a/common/taskana-common/src/main/java/pro/taskana/common/api/BaseQuery.java
+++ b/common/taskana-common/src/main/java/pro/taskana/common/api/BaseQuery.java
@@ -76,14 +76,14 @@ public interface BaseQuery<T, U extends Enum<U> & QueryColumnName> {
    */
   long count();
 
-  default String[] toUpperCopy(String... source) {
+  default String[] toLowerCopy(String... source) {
     if (source == null || source.length == 0) {
       return null;
       // we are currently aware that this is a code smell. Unfortunately the resolution of this
       // would cause havoc in our queries, since we do not have a concept
       // for a user input validation yet. As soon as that is done we can resolve this code smell.
     }
-    return Arrays.stream(source).map(String::toUpperCase).toArray(String[]::new);
+    return Arrays.stream(source).map(String::toLowerCase).toArray(String[]::new);
   }
 
   /** Determines the sort direction. */
diff --git a/common/taskana-common/src/main/java/pro/taskana/common/internal/util/SqlProviderUtil.java b/common/taskana-common/src/main/java/pro/taskana/common/internal/util/SqlProviderUtil.java
index 2d28943ae..46966a00a 100644
--- a/common/taskana-common/src/main/java/pro/taskana/common/internal/util/SqlProviderUtil.java
+++ b/common/taskana-common/src/main/java/pro/taskana/common/internal/util/SqlProviderUtil.java
@@ -100,7 +100,7 @@ public class SqlProviderUtil {
         .append(collection)
         .append(" != null'>AND (<foreach item='item' collection='")
         .append(collection)
-        .append("' separator=' OR '>UPPER(")
+        .append("' separator=' OR '>LOWER(")
         .append(column)
         .append(") LIKE #{item}</foreach>)</if> ");
   }
@@ -114,7 +114,7 @@ public class SqlProviderUtil {
         .append(collection)
         .append(" != null'>AND (<foreach item='item' collection='")
         .append(collection)
-        .append("' separator=' OR '>UPPER(")
+        .append("' separator=' OR '>LOWER(")
         .append(column)
         .append(") NOT LIKE #{item}</foreach>)</if> ");
   }
diff --git a/common/taskana-common/src/main/resources/sql/db2/taskana-schema-db2.sql b/common/taskana-common/src/main/resources/sql/db2/taskana-schema-db2.sql
index 9a0a19c76..9fe2f48f6 100644
--- a/common/taskana-common/src/main/resources/sql/db2/taskana-schema-db2.sql
+++ b/common/taskana-common/src/main/resources/sql/db2/taskana-schema-db2.sql
@@ -380,8 +380,9 @@ CREATE INDEX IDX_TASK_WORKBASKET_KEY_DOMAIN ON TASK
 COMMIT WORK;
 
 CREATE INDEX IDX_TASK_POR_VALUE ON TASK
-    (UPPER("POR_VALUE") ASC, "WORKBASKET_ID" ASC) ALLOW REVERSE SCANS COLLECT SAMPLED DETAILED STATISTICS;
-COMMIT WORK;
+   (LOWER("POR_VALUE") ASC, "WORKBASKET_ID" ASC)
+   ALLOW REVERSE SCANS COLLECT SAMPLED DETAILED STATISTICS;
+COMMIT WORK ;
 
 CREATE INDEX IDX_ATTACHMENT_TASK_ID ON ATTACHMENT
     ("TASK_ID" ASC, "RECEIVED" ASC, "CLASSIFICATION_ID" ASC, "CLASSIFICATION_KEY" ASC,
diff --git a/common/taskana-common/src/main/resources/sql/db2/taskana_schema_update_4.11.0_to_5.0.0_db2.sql b/common/taskana-common/src/main/resources/sql/db2/taskana_schema_update_4.11.0_to_5.0.0_db2.sql
index 8ac5c8898..7279a67fb 100644
--- a/common/taskana-common/src/main/resources/sql/db2/taskana_schema_update_4.11.0_to_5.0.0_db2.sql
+++ b/common/taskana-common/src/main/resources/sql/db2/taskana_schema_update_4.11.0_to_5.0.0_db2.sql
@@ -52,7 +52,7 @@ CREATE INDEX IDX_TASK_WORKBASKET_KEY_DOMAIN ON TASK
 COMMIT WORK ;
 
 CREATE INDEX IDX_TASK_POR_VALUE ON TASK
-   (UPPER("POR_VALUE") ASC, "WORKBASKET_ID" ASC)
+   (LOWER("POR_VALUE") ASC, "WORKBASKET_ID" ASC)
    ALLOW REVERSE SCANS COLLECT SAMPLED DETAILED STATISTICS;
 COMMIT WORK ;
 
diff --git a/common/taskana-common/src/main/resources/sql/postgres/taskana-schema-postgres.sql b/common/taskana-common/src/main/resources/sql/postgres/taskana-schema-postgres.sql
index 50f48212f..e064c67ab 100644
--- a/common/taskana-common/src/main/resources/sql/postgres/taskana-schema-postgres.sql
+++ b/common/taskana-common/src/main/resources/sql/postgres/taskana-schema-postgres.sql
@@ -379,12 +379,12 @@ CREATE INDEX IDX_CLASSIFICATION_KEY_DOMAIN ON CLASSIFICATION
 COMMIT WORK;
 
 
-CREATE INDEX IDX_TASK_WORKBASKET_KEY_DOMAIN ON TASK
-    (WORKBASKET_KEY ASC, DOMAIN DESC);
-COMMIT WORK;
-CREATE INDEX IDX_TASK_POR_VALUE ON TASK
-    (UPPER(POR_VALUE) ASC, WORKBASKET_ID ASC);
-COMMIT WORK;
+ CREATE INDEX IDX_TASK_WORKBASKET_KEY_DOMAIN ON TASK
+   (WORKBASKET_KEY ASC, DOMAIN DESC);
+   COMMIT WORK ;
+ CREATE INDEX IDX_TASK_POR_VALUE ON TASK
+   (LOWER(POR_VALUE) ASC, WORKBASKET_ID ASC);
+   COMMIT WORK ;
 
 
 CREATE INDEX IDX_ATTACHMENT_TASK_ID ON ATTACHMENT
diff --git a/common/taskana-common/src/main/resources/sql/postgres/taskana_schema_update_4.11.0_to_5.0.0_postgres.sql b/common/taskana-common/src/main/resources/sql/postgres/taskana_schema_update_4.11.0_to_5.0.0_postgres.sql
index ccdb16a13..5a0a7d842 100644
--- a/common/taskana-common/src/main/resources/sql/postgres/taskana_schema_update_4.11.0_to_5.0.0_postgres.sql
+++ b/common/taskana-common/src/main/resources/sql/postgres/taskana_schema_update_4.11.0_to_5.0.0_postgres.sql
@@ -42,7 +42,7 @@ COMMIT WORK ;
 
 DROP INDEX IF EXISTS IDX_TASK_2;
 CREATE INDEX IDX_TASK_POR_VALUE ON TASK
-   (UPPER(POR_VALUE) ASC, WORKBASKET_ID ASC);
+   (LOWER(POR_VALUE) ASC, WORKBASKET_ID ASC);
 COMMIT WORK ;
 
 DROP INDEX IF EXISTS IDX_ATTACHMENT_1;
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/ClassificationHistoryQueryImpl.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/ClassificationHistoryQueryImpl.java
index 472c22cdb..ccb1203ca 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/ClassificationHistoryQueryImpl.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/ClassificationHistoryQueryImpl.java
@@ -87,13 +87,13 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
 
   @Override
   public ClassificationHistoryQuery idIn(String... idIn) {
-    this.idIn = toUpperCopy(idIn);
+    this.idIn = idIn;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery eventTypeIn(String... eventType) {
-    this.eventTypeIn = toUpperCopy(eventType);
+    this.eventTypeIn = eventType;
     return this;
   }
 
@@ -105,55 +105,55 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
 
   @Override
   public ClassificationHistoryQuery userIdIn(String... userId) {
-    this.userIdIn = toUpperCopy(userId);
+    this.userIdIn = userId;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery classificationIdIn(String... classificationId) {
-    this.classificationIdIn = toUpperCopy(classificationId);
+    this.classificationIdIn = classificationId;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery applicationEntryPointIn(String... applicationEntryPoint) {
-    this.applicationEntryPointIn = toUpperCopy(applicationEntryPoint);
+    this.applicationEntryPointIn = applicationEntryPoint;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery categoryIn(String... category) {
-    this.categoryIn = toUpperCopy(category);
+    this.categoryIn = category;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery domainIn(String... domain) {
-    this.domainIn = toUpperCopy(domain);
+    this.domainIn = domain;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery keyIn(String... key) {
-    this.keyIn = toUpperCopy(key);
+    this.keyIn = key;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery nameIn(String... name) {
-    this.nameIn = toUpperCopy(name);
+    this.nameIn = name;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery parentIdIn(String... parentId) {
-    this.parentIdIn = toUpperCopy(parentId);
+    this.parentIdIn = parentId;
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery parentKeyIn(String... parentKey) {
-    this.parentKeyIn = toUpperCopy(parentKey);
+    this.parentKeyIn = parentKey;
     return this;
   }
 
@@ -180,28 +180,28 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       ClassificationCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1In = toUpperCopy(searchArguments);
+        custom1In = searchArguments;
         break;
       case CUSTOM_2:
-        custom2In = toUpperCopy(searchArguments);
+        custom2In = searchArguments;
         break;
       case CUSTOM_3:
-        custom3In = toUpperCopy(searchArguments);
+        custom3In = searchArguments;
         break;
       case CUSTOM_4:
-        custom4In = toUpperCopy(searchArguments);
+        custom4In = searchArguments;
         break;
       case CUSTOM_5:
-        custom5In = toUpperCopy(searchArguments);
+        custom5In = searchArguments;
         break;
       case CUSTOM_6:
-        custom6In = toUpperCopy(searchArguments);
+        custom6In = searchArguments;
         break;
       case CUSTOM_7:
-        custom7In = toUpperCopy(searchArguments);
+        custom7In = searchArguments;
         break;
       case CUSTOM_8:
-        custom8In = toUpperCopy(searchArguments);
+        custom8In = searchArguments;
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
@@ -211,73 +211,73 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
 
   @Override
   public ClassificationHistoryQuery eventTypeLike(String... eventType) {
-    this.eventTypeLike = toUpperCopy(eventType);
+    this.eventTypeLike = toLowerCopy(eventType);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery userIdLike(String... userId) {
-    this.userIdLike = toUpperCopy(userId);
+    this.userIdLike = toLowerCopy(userId);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery classificationIdLike(String... classificationId) {
-    this.classificationIdLike = toUpperCopy(classificationId);
+    this.classificationIdLike = toLowerCopy(classificationId);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery applicationEntryPointLike(String... applicationEntryPointLike) {
-    this.applicationEntryPointLike = toUpperCopy(applicationEntryPointLike);
+    this.applicationEntryPointLike = toLowerCopy(applicationEntryPointLike);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery categoryLike(String... category) {
-    this.categoryLike = toUpperCopy(category);
+    this.categoryLike = toLowerCopy(category);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery domainLike(String... domain) {
-    this.domainLike = toUpperCopy(domain);
+    this.domainLike = toLowerCopy(domain);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery keyLike(String... key) {
-    this.keyLike = toUpperCopy(key);
+    this.keyLike = toLowerCopy(key);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery nameLike(String... name) {
-    this.nameLike = toUpperCopy(name);
+    this.nameLike = toLowerCopy(name);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery parentIdLike(String... parentId) {
-    this.parentIdLike = toUpperCopy(parentId);
+    this.parentIdLike = toLowerCopy(parentId);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery parentKeyLike(String... parentKey) {
-    this.parentKeyLike = toUpperCopy(parentKey);
+    this.parentKeyLike = toLowerCopy(parentKey);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery serviceLevelLike(String... serviceLevel) {
-    this.serviceLevelLike = toUpperCopy(serviceLevel);
+    this.serviceLevelLike = toLowerCopy(serviceLevel);
     return this;
   }
 
   @Override
   public ClassificationHistoryQuery typeLike(String... type) {
-    this.typeLike = toUpperCopy(type);
+    this.typeLike = toLowerCopy(type);
     return this;
   }
 
@@ -286,28 +286,28 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       ClassificationCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1Like = toUpperCopy(searchArguments);
+        custom1Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_2:
-        custom2Like = toUpperCopy(searchArguments);
+        custom2Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_3:
-        custom3Like = toUpperCopy(searchArguments);
+        custom3Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_4:
-        custom4Like = toUpperCopy(searchArguments);
+        custom4Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_5:
-        custom5Like = toUpperCopy(searchArguments);
+        custom5Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_6:
-        custom6Like = toUpperCopy(searchArguments);
+        custom6Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_7:
-        custom7Like = toUpperCopy(searchArguments);
+        custom7Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_8:
-        custom8Like = toUpperCopy(searchArguments);
+        custom8Like = toLowerCopy(searchArguments);
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/TaskHistoryQueryImpl.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/TaskHistoryQueryImpl.java
index 1cbeed7dd..acee984d0 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/TaskHistoryQueryImpl.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/TaskHistoryQueryImpl.java
@@ -267,31 +267,31 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
 
   @Override
   public TaskHistoryQuery idIn(String... idIn) {
-    this.idIn = toUpperCopy(idIn);
+    this.idIn = idIn;
     return this;
   }
 
   @Override
   public TaskHistoryQuery businessProcessIdIn(String... businessProcessId) {
-    this.businessProcessIdIn = toUpperCopy(businessProcessId);
+    this.businessProcessIdIn = businessProcessId;
     return this;
   }
 
   @Override
   public TaskHistoryQuery parentBusinessProcessIdIn(String... parentBusinessProcessId) {
-    this.parentBusinessProcessIdIn = toUpperCopy(parentBusinessProcessId);
+    this.parentBusinessProcessIdIn = parentBusinessProcessId;
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskIdIn(String... taskId) {
-    this.taskIdIn = toUpperCopy(taskId);
+    this.taskIdIn = taskId;
     return this;
   }
 
   @Override
   public TaskHistoryQuery eventTypeIn(String... eventType) {
-    this.eventTypeIn = toUpperCopy(eventType);
+    this.eventTypeIn = eventType;
     return this;
   }
 
@@ -303,181 +303,181 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
 
   @Override
   public TaskHistoryQuery userIdIn(String... userId) {
-    this.userIdIn = toUpperCopy(userId);
+    this.userIdIn = userId;
     return this;
   }
 
   @Override
   public TaskHistoryQuery domainIn(String... domain) {
-    this.domainIn = toUpperCopy(domain);
+    this.domainIn = domain;
     return this;
   }
 
   @Override
   public TaskHistoryQuery workbasketKeyIn(String... workbasketKey) {
-    this.workbasketKeyIn = toUpperCopy(workbasketKey);
+    this.workbasketKeyIn = workbasketKey;
     return this;
   }
 
   @Override
   public TaskHistoryQuery porCompanyIn(String... porCompany) {
-    this.porCompanyIn = toUpperCopy(porCompany);
+    this.porCompanyIn = porCompany;
     return this;
   }
 
   @Override
   public TaskHistoryQuery porSystemIn(String... porSystem) {
-    this.porSystemIn = toUpperCopy(porSystem);
+    this.porSystemIn = porSystem;
     return this;
   }
 
   @Override
   public TaskHistoryQuery porInstanceIn(String... porInstance) {
-    this.porInstanceIn = toUpperCopy(porInstance);
+    this.porInstanceIn = porInstance;
     return this;
   }
 
   @Override
   public TaskHistoryQuery porTypeIn(String... porType) {
-    this.porTypeIn = toUpperCopy(porType);
+    this.porTypeIn = porType;
     return this;
   }
 
   @Override
   public TaskHistoryQuery porValueIn(String... porValue) {
-    this.porValueIn = toUpperCopy(porValue);
+    this.porValueIn = porValue;
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskClassificationKeyIn(String... taskClassificationKey) {
-    this.taskClassificationKeyIn = toUpperCopy(taskClassificationKey);
+    this.taskClassificationKeyIn = taskClassificationKey;
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskClassificationCategoryIn(String... taskClassificationCategory) {
-    this.taskClassificationCategoryIn = toUpperCopy(taskClassificationCategory);
+    this.taskClassificationCategoryIn = taskClassificationCategory;
     return this;
   }
 
   @Override
   public TaskHistoryQuery attachmentClassificationKeyIn(String... attachmentClassificationKey) {
-    this.attachmentClassificationKeyIn = toUpperCopy(attachmentClassificationKey);
+    this.attachmentClassificationKeyIn = attachmentClassificationKey;
     return this;
   }
 
   @Override
   public TaskHistoryQuery oldValueIn(String... oldValueIn) {
-    this.oldValueIn = toUpperCopy(oldValueIn);
+    this.oldValueIn = oldValueIn;
     return this;
   }
 
   @Override
   public TaskHistoryQuery newValueIn(String... newValueIn) {
-    this.newValueIn = toUpperCopy(newValueIn);
+    this.newValueIn = newValueIn;
     return this;
   }
 
   @Override
   public TaskHistoryQuery businessProcessIdLike(String... businessProcessId) {
-    this.businessProcessIdLike = toUpperCopy(businessProcessId);
+    this.businessProcessIdLike = toLowerCopy(businessProcessId);
     return this;
   }
 
   @Override
   public TaskHistoryQuery parentBusinessProcessIdLike(String... parentBusinessProcessId) {
-    this.parentBusinessProcessIdLike = toUpperCopy(parentBusinessProcessId);
+    this.parentBusinessProcessIdLike = toLowerCopy(parentBusinessProcessId);
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskIdLike(String... taskId) {
-    this.taskIdLike = toUpperCopy(taskId);
+    this.taskIdLike = toLowerCopy(taskId);
     return this;
   }
 
   @Override
   public TaskHistoryQuery eventTypeLike(String... eventType) {
-    this.eventTypeLike = toUpperCopy(eventType);
+    this.eventTypeLike = toLowerCopy(eventType);
     return this;
   }
 
   @Override
   public TaskHistoryQuery userIdLike(String... userId) {
-    this.userIdLike = toUpperCopy(userId);
+    this.userIdLike = toLowerCopy(userId);
     return this;
   }
 
   @Override
   public TaskHistoryQuery domainLike(String... domain) {
-    this.domainLike = toUpperCopy(domain);
+    this.domainLike = toLowerCopy(domain);
     return this;
   }
 
   @Override
   public TaskHistoryQuery workbasketKeyLike(String... workbasketKey) {
-    this.workbasketKeyLike = toUpperCopy(workbasketKey);
+    this.workbasketKeyLike = toLowerCopy(workbasketKey);
     return this;
   }
 
   @Override
   public TaskHistoryQuery porCompanyLike(String... porCompany) {
-    this.porCompanyLike = toUpperCopy(porCompany);
+    this.porCompanyLike = toLowerCopy(porCompany);
     return this;
   }
 
   @Override
   public TaskHistoryQuery porSystemLike(String... porSystem) {
-    this.porSystemLike = toUpperCopy(porSystem);
+    this.porSystemLike = toLowerCopy(porSystem);
     return this;
   }
 
   @Override
   public TaskHistoryQuery porInstanceLike(String... porInstance) {
-    this.porInstanceLike = toUpperCopy(porInstance);
+    this.porInstanceLike = toLowerCopy(porInstance);
     return this;
   }
 
   @Override
   public TaskHistoryQuery porTypeLike(String... porType) {
-    this.porTypeLike = toUpperCopy(porType);
+    this.porTypeLike = toLowerCopy(porType);
     return this;
   }
 
   @Override
   public TaskHistoryQuery porValueLike(String... porValue) {
-    this.porValueLike = toUpperCopy(porValue);
+    this.porValueLike = toLowerCopy(porValue);
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskClassificationKeyLike(String... taskClassificationKey) {
-    this.taskClassificationKeyLike = toUpperCopy(taskClassificationKey);
+    this.taskClassificationKeyLike = toLowerCopy(taskClassificationKey);
     return this;
   }
 
   @Override
   public TaskHistoryQuery taskClassificationCategoryLike(String... taskClassificationCategory) {
-    this.taskClassificationCategoryLike = toUpperCopy(taskClassificationCategory);
+    this.taskClassificationCategoryLike = toLowerCopy(taskClassificationCategory);
     return this;
   }
 
   @Override
   public TaskHistoryQuery attachmentClassificationKeyLike(String... attachmentClassificationKey) {
-    this.attachmentClassificationKeyLike = toUpperCopy(attachmentClassificationKey);
+    this.attachmentClassificationKeyLike = toLowerCopy(attachmentClassificationKey);
     return this;
   }
 
   @Override
   public TaskHistoryQuery oldValueLike(String... oldValue) {
-    this.oldValueLike = toUpperCopy(oldValue);
+    this.oldValueLike = toLowerCopy(oldValue);
     return this;
   }
 
   @Override
   public TaskHistoryQuery newValueLike(String... newValue) {
-    this.newValueLike = toUpperCopy(newValue);
+    this.newValueLike = toLowerCopy(newValue);
     return this;
   }
 
@@ -486,16 +486,16 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       TaskHistoryCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1In = toUpperCopy(searchArguments);
+        custom1In = searchArguments;
         break;
       case CUSTOM_2:
-        custom2In = toUpperCopy(searchArguments);
+        custom2In = searchArguments;
         break;
       case CUSTOM_3:
-        custom3In = toUpperCopy(searchArguments);
+        custom3In = searchArguments;
         break;
       case CUSTOM_4:
-        custom4In = toUpperCopy(searchArguments);
+        custom4In = searchArguments;
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
@@ -508,16 +508,16 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       TaskHistoryCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1Like = toUpperCopy(searchArguments);
+        custom1Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_2:
-        custom2Like = toUpperCopy(searchArguments);
+        custom2Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_3:
-        custom3Like = toUpperCopy(searchArguments);
+        custom3Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_4:
-        custom4Like = toUpperCopy(searchArguments);
+        custom4Like = toLowerCopy(searchArguments);
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/WorkbasketHistoryQueryImpl.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/WorkbasketHistoryQueryImpl.java
index fb3488a80..741ad2746 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/WorkbasketHistoryQueryImpl.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/WorkbasketHistoryQueryImpl.java
@@ -207,19 +207,19 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
 
   @Override
   public WorkbasketHistoryQuery idIn(String... idIn) {
-    this.idIn = toUpperCopy(idIn);
+    this.idIn = idIn;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery workbasketIdIn(String... workbasketId) {
-    this.workbasketIdIn = toUpperCopy(workbasketId);
+    this.workbasketIdIn = workbasketId;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery eventTypeIn(String... eventType) {
-    this.eventTypeIn = toUpperCopy(eventType);
+    this.eventTypeIn = eventType;
     return this;
   }
 
@@ -231,55 +231,55 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
 
   @Override
   public WorkbasketHistoryQuery userIdIn(String... userId) {
-    this.userIdIn = toUpperCopy(userId);
+    this.userIdIn = userId;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery domainIn(String... domain) {
-    this.domainIn = toUpperCopy(domain);
+    this.domainIn = domain;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery keyIn(String... workbasketKey) {
-    this.keyIn = toUpperCopy(workbasketKey);
+    this.keyIn = workbasketKey;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery typeIn(String... workbasketType) {
-    this.typeIn = toUpperCopy(workbasketType);
+    this.typeIn = workbasketType;
     return this;
   }
 
   @Override
-  public WorkbasketHistoryQuery ownerIn(String... oownerIn) {
-    this.ownerIn = toUpperCopy(ownerIn);
+  public WorkbasketHistoryQuery ownerIn(String... ownerIn) {
+    this.ownerIn = ownerIn;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel1In(String... orgLevel1) {
-    this.orgLevel1In = toUpperCopy(orgLevel1);
+    this.orgLevel1In = orgLevel1;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel2In(String... orgLevel2) {
-    this.orgLevel2In = toUpperCopy(orgLevel2);
+    this.orgLevel2In = orgLevel2;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel3In(String... orgLevel3) {
-    this.orgLevel3In = toUpperCopy(orgLevel3);
+    this.orgLevel3In = orgLevel3;
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel4In(String... orgLevel4) {
-    this.orgLevel4In = toUpperCopy(orgLevel4);
+    this.orgLevel4In = orgLevel4;
     return this;
   }
 
@@ -288,16 +288,16 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       WorkbasketCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1In = toUpperCopy(searchArguments);
+        custom1In = searchArguments;
         break;
       case CUSTOM_2:
-        custom2In = toUpperCopy(searchArguments);
+        custom2In = searchArguments;
         break;
       case CUSTOM_3:
-        custom3In = toUpperCopy(searchArguments);
+        custom3In = searchArguments;
         break;
       case CUSTOM_4:
-        custom4In = toUpperCopy(searchArguments);
+        custom4In = searchArguments;
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
@@ -310,16 +310,16 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       WorkbasketCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1Like = toUpperCopy(searchArguments);
+        custom1Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_2:
-        custom2Like = toUpperCopy(searchArguments);
+        custom2Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_3:
-        custom3Like = toUpperCopy(searchArguments);
+        custom3Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_4:
-        custom4Like = toUpperCopy(searchArguments);
+        custom4Like = toLowerCopy(searchArguments);
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
@@ -329,67 +329,67 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
 
   @Override
   public WorkbasketHistoryQuery workbasketIdLike(String... workbasketId) {
-    this.workbasketIdLike = toUpperCopy(workbasketId);
+    this.workbasketIdLike = toLowerCopy(workbasketId);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery eventTypeLike(String... eventType) {
-    this.eventTypeLike = toUpperCopy(eventType);
+    this.eventTypeLike = toLowerCopy(eventType);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery userIdLike(String... userId) {
-    this.userIdLike = toUpperCopy(userId);
+    this.userIdLike = toLowerCopy(userId);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery domainLike(String... domain) {
-    this.domainLike = toUpperCopy(domain);
+    this.domainLike = toLowerCopy(domain);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery workbasketKeyLike(String... workbasketKey) {
-    this.keyLike = toUpperCopy(workbasketKey);
+    this.keyLike = toLowerCopy(workbasketKey);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery workbasketTypeLike(String... workbasketType) {
-    this.typeLike = toUpperCopy(workbasketType);
+    this.typeLike = toLowerCopy(workbasketType);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery ownerLike(String... ownerLike) {
-    this.ownerLike = toUpperCopy(ownerLike);
+    this.ownerLike = toLowerCopy(ownerLike);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel1Like(String... orgLevel1) {
-    this.orgLevel1Like = toUpperCopy(orgLevel1);
+    this.orgLevel1Like = toLowerCopy(orgLevel1);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel2Like(String... orgLevel2) {
-    this.orgLevel2Like = toUpperCopy(orgLevel2);
+    this.orgLevel2Like = toLowerCopy(orgLevel2);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel3Like(String... orgLevel3) {
-    this.orgLevel3Like = toUpperCopy(orgLevel3);
+    this.orgLevel3Like = toLowerCopy(orgLevel3);
     return this;
   }
 
   @Override
   public WorkbasketHistoryQuery orgLevel4Like(String... orgLevel4) {
-    this.orgLevel4Like = toUpperCopy(orgLevel4);
+    this.orgLevel4Like = toLowerCopy(orgLevel4);
     return this;
   }
 
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQueryMapper.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQueryMapper.java
index 4d119a512..3778d74fa 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQueryMapper.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/classification/ClassificationHistoryQueryMapper.java
@@ -18,50 +18,50 @@ public interface ClassificationHistoryQueryMapper {
           + "FROM CLASSIFICATION_HISTORY_EVENT"
           + "<where>"
           // IN-Queries
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND ID IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND EVENT_TYPE IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='classificationIdIn != null'>AND UPPER(CLASSIFICATION_ID) IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointIn != null'>AND UPPER(APPLICATION_ENTRY_POINT) IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='categoryIn != null'>AND UPPER(CATEGORY) IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(NAME) IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentIdIn != null'>AND UPPER(PARENT_ID) IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentKeyIn != null'>AND UPPER(PARENT_KEY) IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='priorityIn != null'>AND UPPER(PRIORITY) IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='serviceLevelIn != null'>AND UPPER(SERVICE_LEVEL) IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom5In != null'>AND UPPER(CUSTOM_5) IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom6In != null'>AND UPPER(CUSTOM_6) IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom7In != null'>AND UPPER(CUSTOM_7) IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom8In != null'>AND UPPER(CUSTOM_8) IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND USER_ID IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='classificationIdIn != null'>AND CLASSIFICATION_ID IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointIn != null'>AND APPLICATION_ENTRY_POINT IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='categoryIn != null'>AND CATEGORY IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND DOMAIN IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND KEY IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND NAME IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentIdIn != null'>AND PARENT_ID IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentKeyIn != null'>AND PARENT_KEY IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='priorityIn != null'>AND PRIORITY IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='serviceLevelIn != null'>AND SERVICE_LEVEL IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND TYPE IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND CUSTOM_1 IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND CUSTOM_2 IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND CUSTOM_3 IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND CUSTOM_4 IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom5In != null'>AND CUSTOM_5 IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom6In != null'>AND CUSTOM_6 IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom7In != null'>AND CUSTOM_7 IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom8In != null'>AND CUSTOM_8 IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' > UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >UPPER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >UPPER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
-          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >UPPER(CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >UPPER(PARENT_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >UPPER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >UPPER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >UPPER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >UPPER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >UPPER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >UPPER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' > LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >LOWER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >LOWER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
+          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >LOWER(CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >LOWER(PARENT_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >LOWER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >LOWER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >LOWER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >LOWER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >LOWER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >LOWER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
@@ -96,50 +96,50 @@ public interface ClassificationHistoryQueryMapper {
           + "SELECT COUNT(ID) "
           + "FROM CLASSIFICATION_HISTORY_EVENT"
           + "<where>"
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND LOWER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND LOWER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='classificationIdIn != null'>AND UPPER(CLASSIFICATION_ID) IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointIn != null'>AND UPPER(APPLICATION_ENTRY_POINT) IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='categoryIn != null'>AND UPPER(CATEGORY) IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(NAME) IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentIdIn != null'>AND UPPER(PARENT_ID) IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentKeyIn != null'>AND UPPER(PARENT_KEY) IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='priorityIn != null'>AND UPPER(PRIORITY) IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='serviceLevelIn != null'>AND UPPER(SERVICE_LEVEL) IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom5In != null'>AND UPPER(CUSTOM_5) IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom6In != null'>AND UPPER(CUSTOM_6) IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom7In != null'>AND UPPER(CUSTOM_7) IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom8In != null'>AND UPPER(CUSTOM_8) IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND LOWER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='classificationIdIn != null'>AND LOWER(CLASSIFICATION_ID) IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointIn != null'>AND LOWER(APPLICATION_ENTRY_POINT) IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='categoryIn != null'>AND LOWER(CATEGORY) IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND LOWER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND LOWER(NAME) IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentIdIn != null'>AND LOWER(PARENT_ID) IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentKeyIn != null'>AND LOWER(PARENT_KEY) IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='priorityIn != null'>AND LOWER(PRIORITY) IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='serviceLevelIn != null'>AND LOWER(SERVICE_LEVEL) IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND LOWER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom5In != null'>AND LOWER(CUSTOM_5) IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom6In != null'>AND LOWER(CUSTOM_6) IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom7In != null'>AND LOWER(CUSTOM_7) IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom8In != null'>AND LOWER(CUSTOM_8) IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' > UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >UPPER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >UPPER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
-          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >UPPER(CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >UPPER(PARENT_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >UPPER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >UPPER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >UPPER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >UPPER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >UPPER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >UPPER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' > LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >LOWER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >LOWER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
+          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >LOWER(CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >LOWER(PARENT_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >LOWER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >LOWER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >LOWER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >LOWER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >LOWER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >LOWER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
@@ -149,50 +149,50 @@ public interface ClassificationHistoryQueryMapper {
       "<script>SELECT DISTINCT ${columnName} "
           + "FROM CLASSIFICATION_HISTORY_EVENT"
           + "<where>"
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND LOWER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND LOWER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='classificationIdIn != null'>AND UPPER(CLASSIFICATION_ID) IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointIn != null'>AND UPPER(APPLICATION_ENTRY_POINT) IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='categoryIn != null'>AND UPPER(CATEGORY) IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(NAME) IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentIdIn != null'>AND UPPER(PARENT_ID) IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentKeyIn != null'>AND UPPER(PARENT_KEY) IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='priorityIn != null'>AND UPPER(PRIORITY) IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='serviceLevelIn != null'>AND UPPER(SERVICE_LEVEL) IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom5In != null'>AND UPPER(CUSTOM_5) IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom6In != null'>AND UPPER(CUSTOM_6) IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom7In != null'>AND UPPER(CUSTOM_7) IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom8In != null'>AND UPPER(CUSTOM_8) IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND LOWER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='classificationIdIn != null'>AND LOWER(CLASSIFICATION_ID) IN (<foreach item='item' collection='classificationIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointIn != null'>AND LOWER(APPLICATION_ENTRY_POINT) IN (<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='categoryIn != null'>AND LOWER(CATEGORY) IN (<foreach item='item' collection='categoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND LOWER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND LOWER(NAME) IN (<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentIdIn != null'>AND LOWER(PARENT_ID) IN (<foreach item='item' collection='parentIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentKeyIn != null'>AND LOWER(PARENT_KEY) IN (<foreach item='item' collection='parentKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='priorityIn != null'>AND LOWER(PRIORITY) IN (<foreach item='item' collection='priorityIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='serviceLevelIn != null'>AND LOWER(SERVICE_LEVEL) IN (<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND LOWER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom5In != null'>AND LOWER(CUSTOM_5) IN (<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom6In != null'>AND LOWER(CUSTOM_6) IN (<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom7In != null'>AND LOWER(CUSTOM_7) IN (<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom8In != null'>AND LOWER(CUSTOM_8) IN (<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >UPPER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >UPPER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
-          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >UPPER(CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >UPPER(PARENT_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >UPPER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >UPPER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >UPPER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >UPPER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >UPPER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >UPPER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator= ' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='classificationIdLike != null'>AND (<foreach item='item' collection='classificationIdLike' separator=' OR ' >LOWER(CLASSIFICATION_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >LOWER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
+          + "<if test='categoryLike != null'>AND (<foreach item='item' collection='categoryLike' separator=' OR ' >LOWER(CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentIdLike != null'>AND (<foreach item='item' collection='parentIdLike' separator=' OR ' >LOWER(PARENT_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='parentKeyLike != null'>AND (<foreach item='item' collection='parentKeyLike' separator=' OR ' >LOWER(PARENT_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >LOWER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' >LOWER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' >LOWER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' >LOWER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' >LOWER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/task/TaskHistoryQueryMapper.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/task/TaskHistoryQueryMapper.java
index 8f0ab9b1c..d8e174f67 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/task/TaskHistoryQueryMapper.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/task/TaskHistoryQueryMapper.java
@@ -24,51 +24,51 @@ public interface TaskHistoryQueryMapper {
           + "</if>"
           + "<where>"
           // IN-Queries
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='businessProcessIdIn != null'>AND UPPER(BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentBusinessProcessIdIn != null'>AND UPPER(PARENT_BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskIdIn != null'>AND UPPER(TASK_ID) IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND ID IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='businessProcessIdIn != null'>AND BUSINESS_PROCESS_ID IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentBusinessProcessIdIn != null'>AND PARENT_BUSINESS_PROCESS_ID IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskIdIn != null'>AND TASK_ID IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND EVENT_TYPE IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(t.USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketKeyIn != null'>AND UPPER(WORKBASKET_KEY) IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porCompanyIn != null'>AND UPPER(POR_COMPANY) IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porSystemIn != null'>AND UPPER(POR_SYSTEM) IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porInstanceIn != null'>AND UPPER(POR_INSTANCE) IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porTypeIn != null'>AND UPPER(POR_TYPE) IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porValueIn != null'>AND UPPER(POR_VALUE) IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyIn != null'>AND UPPER(TASK_CLASSIFICATION_KEY) IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryIn != null'>AND UPPER(TASK_CLASSIFICATION_CATEGORY) IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyIn != null'>AND UPPER(ATTACHMENT_CLASSIFICATION_KEY) IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='oldValueIn != null'>AND UPPER(OLD_VALUE) IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='newValueIn != null'>AND UPPER(NEW_VALUE) IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND t.USER_ID IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND DOMAIN IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketKeyIn != null'>AND WORKBASKET_KEY IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porCompanyIn != null'>AND POR_COMPANY IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porSystemIn != null'>AND POR_SYSTEM IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porInstanceIn != null'>AND POR_INSTANCE IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porTypeIn != null'>AND POR_TYPE IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porValueIn != null'>AND POR_VALUE IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyIn != null'>AND TASK_CLASSIFICATION_KEY IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryIn != null'>AND TASK_CLASSIFICATION_CATEGORY IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyIn != null'>AND ATTACHMENT_CLASSIFICATION_KEY IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='oldValueIn != null'>AND OLD_VALUE IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='newValueIn != null'>AND NEW_VALUE IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND CUSTOM_1 IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND CUSTOM_2 IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND CUSTOM_3 IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND CUSTOM_4 IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > UPPER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
-          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >UPPER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >UPPER(TASK_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(t.USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >UPPER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >UPPER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >UPPER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
-          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >UPPER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >UPPER(POR_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >UPPER(POR_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >UPPER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >UPPER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >UPPER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > LOWER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
+          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >LOWER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >LOWER(TASK_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(t.USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >LOWER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >LOWER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >LOWER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
+          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >LOWER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >LOWER(POR_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >LOWER(POR_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >LOWER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >LOWER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >LOWER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
@@ -105,50 +105,50 @@ public interface TaskHistoryQueryMapper {
           + "FROM TASK_HISTORY_EVENT"
           + "<where>"
           // IN-Queries
-          + "<if test='businessProcessIdIn != null'>AND UPPER(BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentBusinessProcessIdIn != null'>AND UPPER(PARENT_BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskIdIn != null'>AND UPPER(TASK_ID) IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='businessProcessIdIn != null'>AND BUSINESS_PROCESS_ID IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentBusinessProcessIdIn != null'>AND PARENT_BUSINESS_PROCESS_ID IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskIdIn != null'>AND TASK_ID IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND EVENT_TYPE IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketKeyIn != null'>AND UPPER(WORKBASKET_KEY) IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porCompanyIn != null'>AND UPPER(POR_COMPANY) IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porSystemIn != null'>AND UPPER(POR_SYSTEM) IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porInstanceIn != null'>AND UPPER(POR_INSTANCE) IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porTypeIn != null'>AND UPPER(POR_TYPE) IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porValueIn != null'>AND UPPER(POR_VALUE) IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyIn != null'>AND UPPER(TASK_CLASSIFICATION_KEY) IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryIn != null'>AND UPPER(TASK_CLASSIFICATION_CATEGORY) IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyIn != null'>AND UPPER(ATTACHMENT_CLASSIFICATION_KEY) IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='oldValueIn != null'>AND UPPER(OLD_VALUE) IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='newValueIn != null'>AND UPPER(NEW_VALUE) IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND USER_ID IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND DOMAIN IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketKeyIn != null'>AND WORKBASKET_KEY IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porCompanyIn != null'>AND POR_COMPANY IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porSystemIn != null'>AND POR_SYSTEM IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porInstanceIn != null'>AND POR_INSTANCE IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porTypeIn != null'>AND POR_TYPE IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porValueIn != null'>AND POR_VALUE IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyIn != null'>AND TASK_CLASSIFICATION_KEY IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryIn != null'>AND TASK_CLASSIFICATION_CATEGORY IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyIn != null'>AND ATTACHMENT_CLASSIFICATION_KEY IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='oldValueIn != null'>AND OLD_VALUE IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='newValueIn != null'>AND NEW_VALUE IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND CUSTOM_1 IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND CUSTOM_2 IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND CUSTOM_3 IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND CUSTOM_4 IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > UPPER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
-          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >UPPER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >UPPER(TASK_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >UPPER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >UPPER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >UPPER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
-          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >UPPER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >UPPER(POR_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >UPPER(POR_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >UPPER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >UPPER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >UPPER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > LOWER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
+          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >LOWER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >LOWER(TASK_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >LOWER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >LOWER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >LOWER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
+          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >LOWER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >LOWER(POR_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >LOWER(POR_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >LOWER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >LOWER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >LOWER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "</script>")
   long countHistoryEvents(TaskHistoryQueryImpl historyEventQuery);
@@ -162,51 +162,51 @@ public interface TaskHistoryQueryMapper {
           + "</if>"
           + "<where>"
           // IN-Queries
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='businessProcessIdIn != null'>AND UPPER(BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='parentBusinessProcessIdIn != null'>AND UPPER(PARENT_BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskIdIn != null'>AND UPPER(TASK_ID) IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND LOWER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='businessProcessIdIn != null'>AND LOWER(BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='businessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='parentBusinessProcessIdIn != null'>AND LOWER(PARENT_BUSINESS_PROCESS_ID) IN (<foreach item='item' collection='parentBusinessProcessIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskIdIn != null'>AND LOWER(TASK_ID) IN (<foreach item='item' collection='taskIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND LOWER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketKeyIn != null'>AND UPPER(WORKBASKET_KEY) IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porCompanyIn != null'>AND UPPER(POR_COMPANY) IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porSystemIn != null'>AND UPPER(POR_SYSTEM) IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porInstanceIn != null'>AND UPPER(POR_INSTANCE) IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porTypeIn != null'>AND UPPER(POR_TYPE) IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='porValueIn != null'>AND UPPER(POR_VALUE) IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyIn != null'>AND UPPER(TASK_CLASSIFICATION_KEY) IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryIn != null'>AND UPPER(TASK_CLASSIFICATION_CATEGORY) IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyIn != null'>AND UPPER(ATTACHMENT_CLASSIFICATION_KEY) IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='oldValueIn != null'>AND UPPER(OLD_VALUE) IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='newValueIn != null'>AND UPPER(NEW_VALUE) IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND LOWER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND LOWER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketKeyIn != null'>AND LOWER(WORKBASKET_KEY) IN (<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porCompanyIn != null'>AND LOWER(POR_COMPANY) IN (<foreach item='item' collection='porCompanyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porSystemIn != null'>AND LOWER(POR_SYSTEM) IN (<foreach item='item' collection='porSystemIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porInstanceIn != null'>AND LOWER(POR_INSTANCE) IN (<foreach item='item' collection='porInstanceIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porTypeIn != null'>AND LOWER(POR_TYPE) IN (<foreach item='item' collection='porTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='porValueIn != null'>AND LOWER(POR_VALUE) IN (<foreach item='item' collection='porValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyIn != null'>AND LOWER(TASK_CLASSIFICATION_KEY) IN (<foreach item='item' collection='taskClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryIn != null'>AND LOWER(TASK_CLASSIFICATION_CATEGORY) IN (<foreach item='item' collection='taskClassificationCategoryIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyIn != null'>AND LOWER(ATTACHMENT_CLASSIFICATION_KEY) IN (<foreach item='item' collection='attachmentClassificationKeyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='oldValueIn != null'>AND LOWER(OLD_VALUE) IN (<foreach item='item' collection='oldValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='newValueIn != null'>AND LOWER(NEW_VALUE) IN (<foreach item='item' collection='newValueIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > UPPER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
-          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >UPPER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >UPPER(TASK_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >UPPER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >UPPER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
-          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >UPPER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
-          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >UPPER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >UPPER(POR_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >UPPER(POR_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >UPPER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
-          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >UPPER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >UPPER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >UPPER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='businessProcessIdLike != null'>AND (<foreach item='item' collection='businessProcessIdLike' separator='OR' > LOWER(BUSINESS_PROCESS_ID) LIKE #{item} </foreach>)</if> "
+          + "<if test='parentBusinessProcessIdLike != null'>AND (<foreach item='item' collection='parentBusinessProcessIdLike' separator=' OR ' >LOWER(PARENT_BUSINESS_PROCESS_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskIdLike != null'>AND (<foreach item='item' collection='taskIdLike' separator=' OR ' >LOWER(TASK_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR ' >LOWER(WORKBASKET_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porCompanyLike != null'>AND (<foreach item='item' collection='porCompanyLike' separator=' OR ' >LOWER(POR_COMPANY) LIKE #{item}</foreach>)</if> "
+          + "<if test='porSystemLike != null'>AND (<foreach item='item' collection='porSystemLike' separator=' OR ' >LOWER(POR_SYSTEM) LIKE #{item}</foreach>)</if> "
+          + "<if test='porInstanceLike != null'>AND (<foreach item='item' collection='porInstanceLike' separator=' OR ' >LOWER(POR_INSTANCE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porTypeLike != null'>AND (<foreach item='item' collection='porTypeLike' separator=' OR ' >LOWER(POR_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='porValueLike != null'>AND (<foreach item='item' collection='porValueLike' separator=' OR ' >LOWER(POR_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationKeyLike != null'>AND (<foreach item='item' collection='taskClassificationKeyLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='taskClassificationCategoryLike != null'>AND (<foreach item='item' collection='taskClassificationCategoryLike' separator=' OR ' >LOWER(TASK_CLASSIFICATION_CATEGORY) LIKE #{item}</foreach>)</if> "
+          + "<if test='attachmentClassificationKeyLike != null'>AND (<foreach item='item' collection='attachmentClassificationKeyLike' separator=' OR ' >LOWER(ATTACHMENT_CLASSIFICATION_KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='oldValueLike != null'>AND (<foreach item='item' collection='oldValueLike' separator=' OR ' >LOWER(OLD_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='newValueLike != null'>AND (<foreach item='item' collection='newValueLike' separator=' OR ' >LOWER(NEW_VALUE) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
diff --git a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/workbasket/WorkbasketHistoryQueryMapper.java b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/workbasket/WorkbasketHistoryQueryMapper.java
index 65546cf30..1c4ffa544 100644
--- a/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/workbasket/WorkbasketHistoryQueryMapper.java
+++ b/history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/workbasket/WorkbasketHistoryQueryMapper.java
@@ -18,39 +18,39 @@ public interface WorkbasketHistoryQueryMapper {
           + "FROM WORKBASKET_HISTORY_EVENT"
           + "<where>"
           // IN-Queries
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketIdIn != null'>AND UPPER(WORKBASKET_ID) IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND ID IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketIdIn != null'>AND WORKBASKET_ID IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND EVENT_TYPE IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerIn != null'>AND UPPER(OWNER) IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1In != null'>AND UPPER(ORGLEVEL_1) IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2In != null'>AND UPPER(ORGLEVEL_2) IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3In != null'>AND UPPER(ORGLEVEL_3) IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4In != null'>AND UPPER(ORGLEVEL_4) IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND USER_ID IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND DOMAIN IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND KEY IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND TYPE IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='ownerIn != null'>AND OWNER IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND CUSTOM_1 IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND CUSTOM_2 IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND CUSTOM_3 IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND CUSTOM_4 IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel1In != null'>AND ORGLEVEL_1 IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel2In != null'>AND ORGLEVEL_2 IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel3In != null'>AND ORGLEVEL_3 IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel4In != null'>AND ORGLEVEL_4 IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >UPPER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(OWNER) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >LOWER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
@@ -78,39 +78,39 @@ public interface WorkbasketHistoryQueryMapper {
           + "SELECT COUNT(ID) "
           + "FROM WORKBASKET_HISTORY_EVENT"
           + "<where>"
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketIdIn != null'>AND UPPER(WORKBASKET_ID) IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND LOWER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketIdIn != null'>AND LOWER(WORKBASKET_ID) IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND LOWER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerIn != null'>AND UPPER(OWNER) IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1In != null'>AND UPPER(ORGLEVEL_1) IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2In != null'>AND UPPER(ORGLEVEL_2) IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3In != null'>AND UPPER(ORGLEVEL_3) IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4In != null'>AND UPPER(ORGLEVEL_4) IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND LOWER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND LOWER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND LOWER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='ownerIn != null'>AND LOWER(OWNER) IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel1In != null'>AND LOWER(ORGLEVEL_1) IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel2In != null'>AND LOWER(ORGLEVEL_2) IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel3In != null'>AND LOWER(ORGLEVEL_3) IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel4In != null'>AND LOWER(ORGLEVEL_4) IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >UPPER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(OWNER) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >LOWER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "</script>")
   long countHistoryEvents(WorkbasketHistoryQueryImpl historyEventQuery);
@@ -119,39 +119,39 @@ public interface WorkbasketHistoryQueryMapper {
       "<script>SELECT DISTINCT ${columnName} "
           + "FROM WORKBASKET_HISTORY_EVENT"
           + "<where>"
-          + "<if test='idIn != null'>AND UPPER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketIdIn != null'>AND UPPER(WORKBASKET_ID) IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='eventTypeIn != null'>AND UPPER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='idIn != null'>AND LOWER(ID) IN (<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='workbasketIdIn != null'>AND LOWER(WORKBASKET_ID) IN (<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='eventTypeIn != null'>AND LOWER(EVENT_TYPE) IN (<foreach item='item' collection='eventTypeIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=',' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='userIdIn != null'>AND UPPER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainIn != null'>AND UPPER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='typeIn != null'>AND UPPER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerIn != null'>AND UPPER(OWNER) IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1In != null'>AND UPPER(ORGLEVEL_1) IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2In != null'>AND UPPER(ORGLEVEL_2) IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3In != null'>AND UPPER(ORGLEVEL_3) IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4In != null'>AND UPPER(ORGLEVEL_4) IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='userIdIn != null'>AND LOWER(USER_ID) IN (<foreach item='item' collection='userIdIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='domainIn != null'>AND LOWER(DOMAIN) IN (<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(KEY) IN (<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='typeIn != null'>AND LOWER(TYPE) IN (<foreach item='item' collection='typeIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='ownerIn != null'>AND LOWER(OWNER) IN (<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(CUSTOM_1) IN (<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(CUSTOM_2) IN (<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(CUSTOM_3) IN (<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(CUSTOM_4) IN (<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel1In != null'>AND LOWER(ORGLEVEL_1) IN (<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel2In != null'>AND LOWER(ORGLEVEL_2) IN (<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel3In != null'>AND LOWER(ORGLEVEL_3) IN (<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel4In != null'>AND LOWER(ORGLEVEL_4) IN (<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
           // LIKE-Queries
-          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >UPPER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >UPPER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >UPPER(USER_ID) LIKE #{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(DOMAIN) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >UPPER(TYPE) LIKE #{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(OWNER) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketIdLike != null'>AND (<foreach item='item' collection='workbasketIdLike' separator=' OR ' >LOWER(WORKBASKET_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='eventTypeLike != null'>AND (<foreach item='item' collection='eventTypeLike' separator=' OR ' >LOWER(EVENT_TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='userIdLike != null'>AND (<foreach item='item' collection='userIdLike' separator=' OR ' >LOWER(USER_ID) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='typeLike != null'>AND (<foreach item='item' collection='typeLike' separator=' OR ' >LOWER(TYPE) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(ORGLEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(ORGLEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(ORGLEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(ORGLEVEL_4) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "</script>")
diff --git a/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryWorkbasketHistoryAccTest.java b/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryWorkbasketHistoryAccTest.java
index e70529f79..6e58caa64 100644
--- a/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryWorkbasketHistoryAccTest.java
+++ b/history/taskana-simplehistory-provider/src/test/java/acceptance/query/QueryWorkbasketHistoryAccTest.java
@@ -12,6 +12,7 @@ import org.junit.jupiter.api.Test;
 
 import pro.taskana.common.api.BaseQuery.SortDirection;
 import pro.taskana.common.api.TimeInterval;
+import pro.taskana.common.api.exceptions.InvalidArgumentException;
 import pro.taskana.simplehistory.impl.SimpleHistoryServiceImpl;
 import pro.taskana.simplehistory.impl.workbasket.WorkbasketHistoryQuery;
 import pro.taskana.simplehistory.impl.workbasket.WorkbasketHistoryQueryColumnName;
@@ -166,6 +167,12 @@ class QueryWorkbasketHistoryAccTest extends AbstractAccTest {
     returnValues = historyService.createWorkbasketHistoryQuery().keyIn("soRt003").list();
     assertThat(returnValues).hasSize(5);
 
+    returnValues = historyService.createWorkbasketHistoryQuery().ownerIn("admin").list();
+    assertThat(returnValues).hasSize(10);
+
+    returnValues = historyService.createWorkbasketHistoryQuery().typeIn("TOPIC").list();
+    assertThat(returnValues).hasSize(10);
+
     returnValues =
         historyService
             .createWorkbasketHistoryQuery()
@@ -207,6 +214,114 @@ class QueryWorkbasketHistoryAccTest extends AbstractAccTest {
     assertThat(returnValues).hasSize(5);
   }
 
+  @Test
+  void should_ReturnHistoryEvents_In_DifferentOrders() throws InvalidArgumentException {
+    List<WorkbasketHistoryEvent> results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByWorkbasketId(SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getWorkbasketId)
+        .containsExactly(
+            "WBI:000000000000000000000000000000000803",
+            "WBI:000000000000000000000000000000000803",
+            "WBI:000000000000000000000000000000000803");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByEventType(SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getEventType)
+        .containsExactly("CREATED", "CREATED", "CREATED");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByOrgLevel(1, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getOrgLevel1)
+        .containsExactly("orgLevel1", "orgLevel1", "orgLevel1");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByOrgLevel(2, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getOrgLevel2)
+        .containsExactly("orgLevel2", "orgLevel2", "orgLevel2");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByOrgLevel(3, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getOrgLevel3)
+        .containsExactly("orgLevel3", "orgLevel3", "orgLevel3");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByOrgLevel(4, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getOrgLevel4)
+        .containsExactly("orgLevel4", "orgLevel4", "orgLevel4");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByCustomAttribute(1, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getId)
+        .containsExactly(
+            "WHI:000000000000000000000000000000000000",
+            "WHI:000000000000000000000000000000000002",
+            "WHI:000000000000000000000000000000000004");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByCustomAttribute(2, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getId)
+        .containsExactly(
+            "WHI:000000000000000000000000000000000000",
+            "WHI:000000000000000000000000000000000002",
+            "WHI:000000000000000000000000000000000004");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByCustomAttribute(3, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getId)
+        .containsExactly(
+            "WHI:000000000000000000000000000000000000",
+            "WHI:000000000000000000000000000000000002",
+            "WHI:000000000000000000000000000000000004");
+
+    results =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .orderByCustomAttribute(4, SortDirection.ASCENDING)
+            .listPage(0, 3);
+    assertThat(results)
+        .extracting(WorkbasketHistoryEvent::getId)
+        .containsExactly(
+            "WHI:000000000000000000000000000000000000",
+            "WHI:000000000000000000000000000000000002",
+            "WHI:000000000000000000000000000000000004");
+  }
+
   @Test
   void should_ReturnHistoryEvents_For_DifferentLikeAttributes() {
 
@@ -238,11 +353,41 @@ class QueryWorkbasketHistoryAccTest extends AbstractAccTest {
     returnValues =
         historyService
             .createWorkbasketHistoryQuery()
-            .customAttributeLike(WorkbasketCustomField.CUSTOM_1, "other%")
+            .customAttributeLike(WorkbasketCustomField.CUSTOM_1, "other%1")
             .list();
     assertThat(returnValues).hasSize(5);
 
-    returnValues = historyService.createWorkbasketHistoryQuery().orgLevel1Like("org%").list();
+    returnValues =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .customAttributeLike(WorkbasketCustomField.CUSTOM_2, "other%2")
+            .list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .customAttributeLike(WorkbasketCustomField.CUSTOM_3, "other%3")
+            .list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues =
+        historyService
+            .createWorkbasketHistoryQuery()
+            .customAttributeLike(WorkbasketCustomField.CUSTOM_4, "other%4")
+            .list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues = historyService.createWorkbasketHistoryQuery().orgLevel1Like("org%1").list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues = historyService.createWorkbasketHistoryQuery().orgLevel2Like("org%2").list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues = historyService.createWorkbasketHistoryQuery().orgLevel3Like("org%3").list();
+    assertThat(returnValues).hasSize(5);
+
+    returnValues = historyService.createWorkbasketHistoryQuery().orgLevel4Like("org%4").list();
     assertThat(returnValues).hasSize(5);
   }
 
diff --git a/history/taskana-simplehistory-provider/src/test/resources/log4j2-test.xml b/history/taskana-simplehistory-provider/src/test/resources/log4j2-test.xml
deleted file mode 100644
index b2c806d68..000000000
--- a/history/taskana-simplehistory-provider/src/test/resources/log4j2-test.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE xml>
-<Configuration status="WARN">
-  <Appenders>
-    <Console name="Console" target="SYSTEM_OUT">
-      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
-    </Console>
-  </Appenders>
-  <Loggers>
-    <Root level="info">
-      <AppenderRef ref="Console"/>
-    </Root>
-  </Loggers>
-</Configuration>
diff --git a/history/taskana-simplehistory-provider/src/test/resources/simplelogger.properties b/history/taskana-simplehistory-provider/src/test/resources/simplelogger.properties
new file mode 100644
index 000000000..70d8c16b3
--- /dev/null
+++ b/history/taskana-simplehistory-provider/src/test/resources/simplelogger.properties
@@ -0,0 +1,35 @@
+# SLF4J's SimpleLogger configuration file
+# Simple implementation of Logger that sends all enabled log messages, for all defined loggers, to System.err.
+
+# Default logging detail level for all instances of SimpleLogger.
+# Must be one of ("trace", "debug", "info", "warn", or "error").
+# If not specified, defaults to "info".
+org.slf4j.simpleLogger.defaultLogLevel=info
+
+# Logging detail level for a SimpleLogger instance named "xxxxx".
+# Must be one of ("trace", "debug", "info", "warn", or "error").
+# If not specified, the default logging detail level is used.
+org.slf4j.simpleLogger.log.pro.taskana=info
+org.slf4j.simpleLogger.log.org.apache.ibatis=info
+
+# Set to true if you want the current date and time to be included in output messages.
+# Default is false, and will output the number of milliseconds elapsed since startup.
+org.slf4j.simpleLogger.showDateTime=true
+
+# The date and time format to be used in the output messages.
+# The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat.
+# If the format is not specified or is invalid, the default format is used.
+# The default format is yyyy-MM-dd HH:mm:ss:SSS Z.
+org.slf4j.simpleLogger.dateTimeFormat=yyyy-MM-dd HH:mm:ss:SSS Z
+
+# Set to true if you want to output the current thread name.
+# Defaults to true.
+org.slf4j.simpleLogger.showThreadName=true
+
+# Set to true if you want the Logger instance name to be included in output messages.
+# Defaults to true.
+#org.slf4j.simpleLogger.showLogName=true
+
+# Set to true if you want the last component of the name to be included in output messages.
+# Defaults to false.
+org.slf4j.simpleLogger.showShortLogName=false
diff --git a/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryImpl.java
index 8a8698f19..688930cb8 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryImpl.java
@@ -142,13 +142,13 @@ public class ClassificationQueryImpl implements ClassificationQuery {
 
   @Override
   public ClassificationQuery nameLike(String... nameLike) {
-    this.nameLike = toUpperCopy(nameLike);
+    this.nameLike = toLowerCopy(nameLike);
     return this;
   }
 
   @Override
   public ClassificationQuery descriptionLike(String description) {
-    this.descriptionLike = description.toUpperCase();
+    this.descriptionLike = description.toLowerCase();
     return this;
   }
 
@@ -166,7 +166,7 @@ public class ClassificationQueryImpl implements ClassificationQuery {
 
   @Override
   public ClassificationQuery serviceLevelLike(String... serviceLevelLike) {
-    this.serviceLevelLike = toUpperCopy(serviceLevelLike);
+    this.serviceLevelLike = toLowerCopy(serviceLevelLike);
     return this;
   }
 
@@ -178,7 +178,7 @@ public class ClassificationQueryImpl implements ClassificationQuery {
 
   @Override
   public ClassificationQuery applicationEntryPointLike(String... applicationEntryPointLike) {
-    this.applicationEntryPointLike = toUpperCopy(applicationEntryPointLike);
+    this.applicationEntryPointLike = toLowerCopy(applicationEntryPointLike);
     return this;
   }
 
@@ -232,28 +232,28 @@ public class ClassificationQueryImpl implements ClassificationQuery {
 
     switch (customField) {
       case CUSTOM_1:
-        this.custom1Like = toUpperCopy(customLike);
+        this.custom1Like = toLowerCopy(customLike);
         break;
       case CUSTOM_2:
-        this.custom2Like = toUpperCopy(customLike);
+        this.custom2Like = toLowerCopy(customLike);
         break;
       case CUSTOM_3:
-        this.custom3Like = toUpperCopy(customLike);
+        this.custom3Like = toLowerCopy(customLike);
         break;
       case CUSTOM_4:
-        this.custom4Like = toUpperCopy(customLike);
+        this.custom4Like = toLowerCopy(customLike);
         break;
       case CUSTOM_5:
-        this.custom5Like = toUpperCopy(customLike);
+        this.custom5Like = toLowerCopy(customLike);
         break;
       case CUSTOM_6:
-        this.custom6Like = toUpperCopy(customLike);
+        this.custom6Like = toLowerCopy(customLike);
         break;
       case CUSTOM_7:
-        this.custom7Like = toUpperCopy(customLike);
+        this.custom7Like = toLowerCopy(customLike);
         break;
       case CUSTOM_8:
-        this.custom8Like = toUpperCopy(customLike);
+        this.custom8Like = toLowerCopy(customLike);
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
diff --git a/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryMapper.java b/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryMapper.java
index 099f84258..71b3508e3 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryMapper.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryMapper.java
@@ -24,29 +24,29 @@ public interface ClassificationQueryMapper {
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=' OR ' > ( <if test='item.begin!=null'> CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
           + "<if test='modifiedIn !=null'> AND ( <foreach item='item' collection='modifiedIn' separator=' OR ' > ( <if test='item.begin!=null'> MODIFIED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> MODIFIED &lt;=#{item.end} </if>)</foreach>)</if> "
           + "<if test='nameIn != null'>AND NAME IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR '>UPPER(NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='descriptionLike != null'>AND UPPER(DESCRIPTION) like #{descriptionLike}</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR '>LOWER(NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='descriptionLike != null'>AND LOWER(DESCRIPTION) like #{descriptionLike}</if> "
           + "<if test='priority != null'>AND PRIORITY IN(<foreach item='item' collection='priority' separator=',' >#{item}</foreach>)</if> "
           + "<if test='serviceLevelIn != null'>AND SERVICE_LEVEL IN(<foreach item='item' collection='serviceLevelIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >UPPER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
+          + "<if test='serviceLevelLike != null'>AND (<foreach item='item' collection='serviceLevelLike' separator=' OR ' >LOWER(SERVICE_LEVEL) LIKE #{item}</foreach>)</if> "
           + "<if test='applicationEntryPointIn != null'>AND APPLICATION_ENTRY_POINT IN(<foreach item='item' collection='applicationEntryPointIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >UPPER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
+          + "<if test='applicationEntryPointLike != null'>AND (<foreach item='item' collection='applicationEntryPointLike' separator=' OR ' >LOWER(APPLICATION_ENTRY_POINT) LIKE #{item}</foreach>)</if> "
           + "<if test='custom1In != null'>AND CUSTOM_1 IN(<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' > UPPER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' > LOWER(CUSTOM_1) LIKE #{item}</foreach>)</if> "
           + "<if test='custom2In != null'>AND CUSTOM_2 IN(<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' > UPPER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' > LOWER(CUSTOM_2) LIKE #{item}</foreach>)</if> "
           + "<if test='custom3In != null'>AND CUSTOM_3 IN(<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' > UPPER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' > LOWER(CUSTOM_3) LIKE #{item}</foreach>)</if> "
           + "<if test='custom4In != null'>AND CUSTOM_4 IN(<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' > UPPER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' > LOWER(CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "<if test='custom5In != null'>AND CUSTOM_5 IN(<foreach item='item' collection='custom5In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' > UPPER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom5Like != null'>AND (<foreach item='item' collection='custom5Like' separator=' OR ' > LOWER(CUSTOM_5) LIKE #{item}</foreach>)</if> "
           + "<if test='custom6In != null'>AND CUSTOM_6 IN(<foreach item='item' collection='custom6In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' > UPPER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom6Like != null'>AND (<foreach item='item' collection='custom6Like' separator=' OR ' > LOWER(CUSTOM_6) LIKE #{item}</foreach>)</if> "
           + "<if test='custom7In != null'>AND CUSTOM_7 IN(<foreach item='item' collection='custom7In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' > UPPER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom7Like != null'>AND (<foreach item='item' collection='custom7Like' separator=' OR ' > LOWER(CUSTOM_7) LIKE #{item}</foreach>)</if> "
           + "<if test='custom8In != null'>AND CUSTOM_8 IN(<foreach item='item' collection='custom8In' separator=',' >#{item}</foreach>) </if> "
-          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' > UPPER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom8Like != null'>AND (<foreach item='item' collection='custom8Like' separator=' OR ' > LOWER(CUSTOM_8) LIKE #{item}</foreach>)</if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='item' collection='orderBy' separator=',' >${item}</foreach></if> "
           + "<if test=\"_databaseId == 'db2'\">with UR </if> "
diff --git a/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimeIntervalReportBuilderImpl.java b/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimeIntervalReportBuilderImpl.java
index 293503ba0..e7bdb635c 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimeIntervalReportBuilderImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimeIntervalReportBuilderImpl.java
@@ -299,52 +299,52 @@ abstract class TimeIntervalReportBuilderImpl<
 
     switch (customField) {
       case CUSTOM_1:
-        this.custom1Like = toUpperCopy(strings);
+        this.custom1Like = toLowerCopy(strings);
         break;
       case CUSTOM_2:
-        this.custom2Like = toUpperCopy(strings);
+        this.custom2Like = toLowerCopy(strings);
         break;
       case CUSTOM_3:
-        this.custom3Like = toUpperCopy(strings);
+        this.custom3Like = toLowerCopy(strings);
         break;
       case CUSTOM_4:
-        this.custom4Like = toUpperCopy(strings);
+        this.custom4Like = toLowerCopy(strings);
         break;
       case CUSTOM_5:
-        this.custom5Like = toUpperCopy(strings);
+        this.custom5Like = toLowerCopy(strings);
         break;
       case CUSTOM_6:
-        this.custom6Like = toUpperCopy(strings);
+        this.custom6Like = toLowerCopy(strings);
         break;
       case CUSTOM_7:
-        this.custom7Like = toUpperCopy(strings);
+        this.custom7Like = toLowerCopy(strings);
         break;
       case CUSTOM_8:
-        this.custom8Like = toUpperCopy(strings);
+        this.custom8Like = toLowerCopy(strings);
         break;
       case CUSTOM_9:
-        this.custom9Like = toUpperCopy(strings);
+        this.custom9Like = toLowerCopy(strings);
         break;
       case CUSTOM_10:
-        this.custom10Like = toUpperCopy(strings);
+        this.custom10Like = toLowerCopy(strings);
         break;
       case CUSTOM_11:
-        this.custom11Like = toUpperCopy(strings);
+        this.custom11Like = toLowerCopy(strings);
         break;
       case CUSTOM_12:
-        this.custom12Like = toUpperCopy(strings);
+        this.custom12Like = toLowerCopy(strings);
         break;
       case CUSTOM_13:
-        this.custom13Like = toUpperCopy(strings);
+        this.custom13Like = toLowerCopy(strings);
         break;
       case CUSTOM_14:
-        this.custom14Like = toUpperCopy(strings);
+        this.custom14Like = toLowerCopy(strings);
         break;
       case CUSTOM_15:
-        this.custom15Like = toUpperCopy(strings);
+        this.custom15Like = toLowerCopy(strings);
         break;
       case CUSTOM_16:
-        this.custom16Like = toUpperCopy(strings);
+        this.custom16Like = toLowerCopy(strings);
         break;
       default:
         throw new SystemException("Unknown custom field '" + customField + "'");
@@ -439,7 +439,7 @@ abstract class TimeIntervalReportBuilderImpl<
     return false;
   }
 
-  private String[] toUpperCopy(String... source) {
+  private String[] toLowerCopy(String... source) {
     if (source == null || source.length == 0) {
       // we are currently aware that this is a code smell. Unfortunately the resolution of this
       // would cause havoc in our queries, since we do not have a concept
@@ -448,7 +448,7 @@ abstract class TimeIntervalReportBuilderImpl<
     } else {
       String[] target = new String[source.length];
       for (int i = 0; i < source.length; i++) {
-        target[i] = source[i].toUpperCase();
+        target[i] = source[i].toLowerCase();
       }
       return target;
     }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/WorkbasketPriorityReportBuilderImpl.java b/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/WorkbasketPriorityReportBuilderImpl.java
index b9fe7b981..0215989b3 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/WorkbasketPriorityReportBuilderImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/WorkbasketPriorityReportBuilderImpl.java
@@ -302,52 +302,52 @@ public class WorkbasketPriorityReportBuilderImpl implements WorkbasketPriorityRe
 
     switch (customField) {
       case CUSTOM_1:
-        this.custom1Like = toUpperCopy(strings);
+        this.custom1Like = toLowerCopy(strings);
         break;
       case CUSTOM_2:
-        this.custom2Like = toUpperCopy(strings);
+        this.custom2Like = toLowerCopy(strings);
         break;
       case CUSTOM_3:
-        this.custom3Like = toUpperCopy(strings);
+        this.custom3Like = toLowerCopy(strings);
         break;
       case CUSTOM_4:
-        this.custom4Like = toUpperCopy(strings);
+        this.custom4Like = toLowerCopy(strings);
         break;
       case CUSTOM_5:
-        this.custom5Like = toUpperCopy(strings);
+        this.custom5Like = toLowerCopy(strings);
         break;
       case CUSTOM_6:
-        this.custom6Like = toUpperCopy(strings);
+        this.custom6Like = toLowerCopy(strings);
         break;
       case CUSTOM_7:
-        this.custom7Like = toUpperCopy(strings);
+        this.custom7Like = toLowerCopy(strings);
         break;
       case CUSTOM_8:
-        this.custom8Like = toUpperCopy(strings);
+        this.custom8Like = toLowerCopy(strings);
         break;
       case CUSTOM_9:
-        this.custom9Like = toUpperCopy(strings);
+        this.custom9Like = toLowerCopy(strings);
         break;
       case CUSTOM_10:
-        this.custom10Like = toUpperCopy(strings);
+        this.custom10Like = toLowerCopy(strings);
         break;
       case CUSTOM_11:
-        this.custom11Like = toUpperCopy(strings);
+        this.custom11Like = toLowerCopy(strings);
         break;
       case CUSTOM_12:
-        this.custom12Like = toUpperCopy(strings);
+        this.custom12Like = toLowerCopy(strings);
         break;
       case CUSTOM_13:
-        this.custom13Like = toUpperCopy(strings);
+        this.custom13Like = toLowerCopy(strings);
         break;
       case CUSTOM_14:
-        this.custom14Like = toUpperCopy(strings);
+        this.custom14Like = toLowerCopy(strings);
         break;
       case CUSTOM_15:
-        this.custom15Like = toUpperCopy(strings);
+        this.custom15Like = toLowerCopy(strings);
         break;
       case CUSTOM_16:
-        this.custom16Like = toUpperCopy(strings);
+        this.custom16Like = toLowerCopy(strings);
         break;
       default:
         throw new SystemException("Unknown custom field '" + customField + "'");
@@ -356,7 +356,7 @@ public class WorkbasketPriorityReportBuilderImpl implements WorkbasketPriorityRe
     return this;
   }
 
-  private String[] toUpperCopy(String... source) {
+  private String[] toLowerCopy(String... source) {
     if (source == null || source.length == 0) {
       // we are currently aware that this is a code smell. Unfortunately the resolution of this
       // would cause havoc in our queries, since we do not have a concept
@@ -365,7 +365,7 @@ public class WorkbasketPriorityReportBuilderImpl implements WorkbasketPriorityRe
     } else {
       String[] target = new String[source.length];
       for (int i = 0; i < source.length; i++) {
-        target[i] = source[i].toUpperCase();
+        target[i] = source[i].toLowerCase();
       }
       return target;
     }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskCommentQueryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskCommentQueryImpl.java
index debc66701..41c62f4e3 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskCommentQueryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskCommentQueryImpl.java
@@ -78,13 +78,13 @@ public class TaskCommentQueryImpl implements TaskCommentQuery {
 
   @Override
   public TaskCommentQuery idLike(String... taskCommentIds) {
-    this.idLike = toUpperCopy(taskCommentIds);
+    this.idLike = toLowerCopy(taskCommentIds);
     return this;
   }
 
   @Override
   public TaskCommentQuery idNotLike(String... taskCommentIds) {
-    this.idNotLike = toUpperCopy(taskCommentIds);
+    this.idNotLike = toLowerCopy(taskCommentIds);
     return this;
   }
 
@@ -96,13 +96,13 @@ public class TaskCommentQueryImpl implements TaskCommentQuery {
 
   @Override
   public TaskCommentQuery textFieldLike(String... texts) {
-    this.textFieldLike = toUpperCopy(texts);
+    this.textFieldLike = toLowerCopy(texts);
     return this;
   }
 
   @Override
   public TaskCommentQuery textFieldNotLike(String... texts) {
-    this.textFieldNotLike = toUpperCopy(texts);
+    this.textFieldNotLike = toLowerCopy(texts);
     return this;
   }
 
@@ -120,13 +120,13 @@ public class TaskCommentQueryImpl implements TaskCommentQuery {
 
   @Override
   public TaskCommentQuery creatorLike(String... creators) {
-    this.creatorLike = toUpperCopy(creators);
+    this.creatorLike = toLowerCopy(creators);
     return this;
   }
 
   @Override
   public TaskCommentQuery creatorNotLike(String... creators) {
-    this.creatorNotLike = toUpperCopy(creators);
+    this.creatorNotLike = toLowerCopy(creators);
     return this;
   }
 
diff --git a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQueryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQueryImpl.java
index a61007924..0b16f238b 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQueryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQueryImpl.java
@@ -599,13 +599,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery nameLike(String... names) {
-    this.nameLike = toUpperCopy(names);
+    this.nameLike = toLowerCopy(names);
     return this;
   }
 
   @Override
   public TaskQuery nameNotLike(String... names) {
-    this.nameNotLike = toUpperCopy(names);
+    this.nameNotLike = toLowerCopy(names);
     return this;
   }
 
@@ -631,13 +631,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery creatorLike(String... creators) {
-    this.creatorLike = toUpperCopy(creators);
+    this.creatorLike = toLowerCopy(creators);
     return this;
   }
 
   @Override
   public TaskQuery creatorNotLike(String... creators) {
-    this.creatorNotLike = toUpperCopy(creators);
+    this.creatorNotLike = toLowerCopy(creators);
     return this;
   }
 
@@ -651,13 +651,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery noteLike(String... note) {
-    this.noteLike = toUpperCopy(note);
+    this.noteLike = toLowerCopy(note);
     return this;
   }
 
   @Override
   public TaskQuery noteNotLike(String... note) {
-    this.noteNotLike = toUpperCopy(note);
+    this.noteNotLike = toLowerCopy(note);
     return this;
   }
 
@@ -671,13 +671,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery descriptionLike(String... description) {
-    this.descriptionLike = toUpperCopy(description);
+    this.descriptionLike = toLowerCopy(description);
     return this;
   }
 
   @Override
   public TaskQuery descriptionNotLike(String... description) {
-    this.descriptionNotLike = toUpperCopy(description);
+    this.descriptionNotLike = toLowerCopy(description);
     return this;
   }
 
@@ -753,13 +753,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery classificationKeyLike(String... classificationKeys) {
-    this.classificationKeyLike = toUpperCopy(classificationKeys);
+    this.classificationKeyLike = toLowerCopy(classificationKeys);
     return this;
   }
 
   @Override
   public TaskQuery classificationKeyNotLike(String... classificationKeys) {
-    this.classificationKeyNotLike = toUpperCopy(classificationKeys);
+    this.classificationKeyNotLike = toLowerCopy(classificationKeys);
     return this;
   }
 
@@ -787,13 +787,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery classificationCategoryLike(String... classificationCategories) {
-    this.classificationCategoryLike = toUpperCopy(classificationCategories);
+    this.classificationCategoryLike = toLowerCopy(classificationCategories);
     return this;
   }
 
   @Override
   public TaskQuery classificationCategoryNotLike(String... classificationCategories) {
-    this.classificationCategoryNotLike = classificationCategories;
+    this.classificationCategoryNotLike = toLowerCopy(classificationCategories);
     return this;
   }
 
@@ -817,14 +817,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery classificationNameLike(String... classificationNames) {
     joinWithClassifications = true;
-    this.classificationNameLike = toUpperCopy(classificationNames);
+    this.classificationNameLike = toLowerCopy(classificationNames);
     return this;
   }
 
   @Override
   public TaskQuery classificationNameNotLike(String... classificationNames) {
     joinWithClassifications = true;
-    this.classificationNameNotLike = toUpperCopy(classificationNames);
+    this.classificationNameNotLike = toLowerCopy(classificationNames);
     return this;
   }
 
@@ -889,13 +889,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery businessProcessIdLike(String... businessProcessIds) {
-    this.businessProcessIdLike = businessProcessIds;
+    this.businessProcessIdLike = toLowerCopy(businessProcessIds);
     return this;
   }
 
   @Override
   public TaskQuery businessProcessIdNotLike(String... businessProcessIds) {
-    this.businessProcessIdNotLike = businessProcessIds;
+    this.businessProcessIdNotLike = toLowerCopy(businessProcessIds);
     return this;
   }
 
@@ -921,13 +921,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery parentBusinessProcessIdLike(String... businessProcessIds) {
-    this.parentBusinessProcessIdLike = businessProcessIds;
+    this.parentBusinessProcessIdLike = toLowerCopy(businessProcessIds);
     return this;
   }
 
   @Override
   public TaskQuery parentBusinessProcessIdNotLike(String... businessProcessIds) {
-    this.parentBusinessProcessIdNotLike = businessProcessIds;
+    this.parentBusinessProcessIdNotLike = toLowerCopy(businessProcessIds);
     return this;
   }
 
@@ -953,13 +953,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery ownerLike(String... owners) {
-    this.ownerLike = toUpperCopy(owners);
+    this.ownerLike = toLowerCopy(owners);
     return this;
   }
 
   @Override
   public TaskQuery ownerNotLike(String... owners) {
-    this.ownerNotLike = toUpperCopy(owners);
+    this.ownerNotLike = toLowerCopy(owners);
     return this;
   }
 
@@ -986,14 +986,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery ownerLongNameLike(String... longNames) {
     joinWithUserInfo = true;
-    this.ownerLongNameLike = toUpperCopy(longNames);
+    this.ownerLongNameLike = toLowerCopy(longNames);
     return this;
   }
 
   @Override
   public TaskQuery ownerLongNameNotLike(String... longNames) {
     joinWithUserInfo = true;
-    this.ownerLongNameNotLike = toUpperCopy(longNames);
+    this.ownerLongNameNotLike = toLowerCopy(longNames);
     return this;
   }
 
@@ -1022,13 +1022,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery primaryObjectReferenceCompanyLike(String... company) {
-    this.porCompanyLike = toUpperCopy(company);
+    this.porCompanyLike = toLowerCopy(company);
     return this;
   }
 
   @Override
   public TaskQuery primaryObjectReferenceCompanyNotLike(String... company) {
-    this.porCompanyNotLike = toUpperCopy(company);
+    this.porCompanyNotLike = toLowerCopy(company);
     return this;
   }
 
@@ -1054,13 +1054,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery primaryObjectReferenceSystemLike(String... system) {
-    this.porSystemLike = toUpperCopy(system);
+    this.porSystemLike = toLowerCopy(system);
     return this;
   }
 
   @Override
   public TaskQuery primaryObjectReferenceSystemNotLike(String... systems) {
-    this.porSystemNotLike = toUpperCopy(systems);
+    this.porSystemNotLike = toLowerCopy(systems);
     return this;
   }
 
@@ -1086,13 +1086,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery primaryObjectReferenceSystemInstanceLike(String... systemInstance) {
-    this.porSystemInstanceLike = toUpperCopy(systemInstance);
+    this.porSystemInstanceLike = toLowerCopy(systemInstance);
     return this;
   }
 
   @Override
   public TaskQuery primaryObjectReferenceSystemInstanceNotLike(String... systemInstances) {
-    this.porSystemInstanceNotLike = toUpperCopy(systemInstances);
+    this.porSystemInstanceNotLike = toLowerCopy(systemInstances);
     return this;
   }
 
@@ -1118,13 +1118,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery primaryObjectReferenceTypeLike(String... types) {
-    this.porTypeLike = toUpperCopy(types);
+    this.porTypeLike = toLowerCopy(types);
     return this;
   }
 
   @Override
   public TaskQuery primaryObjectReferenceTypeNotLike(String... types) {
-    this.porTypeNotLike = toUpperCopy(types);
+    this.porTypeNotLike = toLowerCopy(types);
     return this;
   }
 
@@ -1150,13 +1150,13 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery primaryObjectReferenceValueLike(String... values) {
-    this.porValueLike = toUpperCopy(values);
+    this.porValueLike = toLowerCopy(values);
     return this;
   }
 
   @Override
   public TaskQuery primaryObjectReferenceValueNotLike(String... values) {
-    this.porValueNotLike = toUpperCopy(values);
+    this.porValueNotLike = toLowerCopy(values);
     return this;
   }
 
@@ -1229,14 +1229,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery attachmentClassificationKeyLike(String... attachmentClassificationKey) {
     joinWithAttachments = true;
-    this.attachmentClassificationKeyLike = toUpperCopy(attachmentClassificationKey);
+    this.attachmentClassificationKeyLike = toLowerCopy(attachmentClassificationKey);
     return this;
   }
 
   @Override
   public TaskQuery attachmentClassificationKeyNotLike(String... attachmentClassificationKey) {
     joinWithAttachments = true;
-    this.attachmentClassificationKeyNotLike = toUpperCopy(attachmentClassificationKey);
+    this.attachmentClassificationKeyNotLike = toLowerCopy(attachmentClassificationKey);
     return this;
   }
 
@@ -1269,14 +1269,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery attachmentClassificationNameLike(String... attachmentClassificationName) {
     joinWithAttachmentClassifications = true;
-    this.attachmentClassificationNameLike = toUpperCopy(attachmentClassificationName);
+    this.attachmentClassificationNameLike = toLowerCopy(attachmentClassificationName);
     return this;
   }
 
   @Override
   public TaskQuery attachmentClassificationNameNotLike(String... attachmentClassificationName) {
     joinWithAttachmentClassifications = true;
-    this.attachmentClassificationNameNotLike = toUpperCopy(attachmentClassificationName);
+    this.attachmentClassificationNameNotLike = toLowerCopy(attachmentClassificationName);
     return this;
   }
 
@@ -1309,14 +1309,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery attachmentChannelLike(String... attachmentChannel) {
     joinWithAttachments = true;
-    this.attachmentChannelLike = toUpperCopy(attachmentChannel);
+    this.attachmentChannelLike = toLowerCopy(attachmentChannel);
     return this;
   }
 
   @Override
   public TaskQuery attachmentChannelNotLike(String... attachmentChannel) {
     joinWithAttachments = true;
-    this.attachmentChannelNotLike = toUpperCopy(attachmentChannel);
+    this.attachmentChannelNotLike = toLowerCopy(attachmentChannel);
     return this;
   }
 
@@ -1347,14 +1347,14 @@ public class TaskQueryImpl implements TaskQuery {
   @Override
   public TaskQuery attachmentReferenceValueLike(String... referenceValue) {
     joinWithAttachments = true;
-    this.attachmentReferenceLike = toUpperCopy(referenceValue);
+    this.attachmentReferenceLike = toLowerCopy(referenceValue);
     return this;
   }
 
   @Override
   public TaskQuery attachmentReferenceValueNotLike(String... referenceValue) {
     joinWithAttachments = true;
-    this.attachmentReferenceNotLike = toUpperCopy(referenceValue);
+    this.attachmentReferenceNotLike = toLowerCopy(referenceValue);
     return this;
   }
 
@@ -1430,7 +1430,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   public TaskQuery sorCompanyLike(String... companyLike) {
     joinWithSecondaryObjectReferences = true;
-    sorCompanyLike = toUpperCopy(companyLike);
+    sorCompanyLike = toLowerCopy(companyLike);
     return this;
   }
 
@@ -1444,7 +1444,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   public TaskQuery sorSystemLike(String... systemLike) {
     joinWithSecondaryObjectReferences = true;
-    sorSystemLike = toUpperCopy(systemLike);
+    sorSystemLike = toLowerCopy(systemLike);
     return this;
   }
 
@@ -1458,7 +1458,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   public TaskQuery sorSystemInstanceLike(String... systemInstanceLike) {
     joinWithSecondaryObjectReferences = true;
-    sorSystemInstanceLike = toUpperCopy(systemInstanceLike);
+    sorSystemInstanceLike = toLowerCopy(systemInstanceLike);
     return this;
   }
 
@@ -1472,7 +1472,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   public TaskQuery sorTypeLike(String... typeLike) {
     joinWithSecondaryObjectReferences = true;
-    sorTypeLike = toUpperCopy(typeLike);
+    sorTypeLike = toLowerCopy(typeLike);
     return this;
   }
 
@@ -1487,7 +1487,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   public TaskQuery sorValueLike(String... valueLike) {
     joinWithSecondaryObjectReferences = true;
-    sorValueLike = toUpperCopy(valueLike);
+    sorValueLike = toLowerCopy(valueLike);
     return this;
   }
 
@@ -1738,52 +1738,52 @@ public class TaskQueryImpl implements TaskQuery {
 
     switch (customField) {
       case CUSTOM_1:
-        this.custom1Like = toUpperCopy(strings);
+        this.custom1Like = toLowerCopy(strings);
         break;
       case CUSTOM_2:
-        this.custom2Like = toUpperCopy(strings);
+        this.custom2Like = toLowerCopy(strings);
         break;
       case CUSTOM_3:
-        this.custom3Like = toUpperCopy(strings);
+        this.custom3Like = toLowerCopy(strings);
         break;
       case CUSTOM_4:
-        this.custom4Like = toUpperCopy(strings);
+        this.custom4Like = toLowerCopy(strings);
         break;
       case CUSTOM_5:
-        this.custom5Like = toUpperCopy(strings);
+        this.custom5Like = toLowerCopy(strings);
         break;
       case CUSTOM_6:
-        this.custom6Like = toUpperCopy(strings);
+        this.custom6Like = toLowerCopy(strings);
         break;
       case CUSTOM_7:
-        this.custom7Like = toUpperCopy(strings);
+        this.custom7Like = toLowerCopy(strings);
         break;
       case CUSTOM_8:
-        this.custom8Like = toUpperCopy(strings);
+        this.custom8Like = toLowerCopy(strings);
         break;
       case CUSTOM_9:
-        this.custom9Like = toUpperCopy(strings);
+        this.custom9Like = toLowerCopy(strings);
         break;
       case CUSTOM_10:
-        this.custom10Like = toUpperCopy(strings);
+        this.custom10Like = toLowerCopy(strings);
         break;
       case CUSTOM_11:
-        this.custom11Like = toUpperCopy(strings);
+        this.custom11Like = toLowerCopy(strings);
         break;
       case CUSTOM_12:
-        this.custom12Like = toUpperCopy(strings);
+        this.custom12Like = toLowerCopy(strings);
         break;
       case CUSTOM_13:
-        this.custom13Like = toUpperCopy(strings);
+        this.custom13Like = toLowerCopy(strings);
         break;
       case CUSTOM_14:
-        this.custom14Like = toUpperCopy(strings);
+        this.custom14Like = toLowerCopy(strings);
         break;
       case CUSTOM_15:
-        this.custom15Like = toUpperCopy(strings);
+        this.custom15Like = toLowerCopy(strings);
         break;
       case CUSTOM_16:
-        this.custom16Like = toUpperCopy(strings);
+        this.custom16Like = toLowerCopy(strings);
         break;
       default:
         throw new SystemException("Unknown custom field '" + customField + "'");
@@ -1802,52 +1802,52 @@ public class TaskQueryImpl implements TaskQuery {
 
     switch (customField) {
       case CUSTOM_1:
-        this.custom1NotLike = toUpperCopy(strings);
+        this.custom1NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_2:
-        this.custom2NotLike = toUpperCopy(strings);
+        this.custom2NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_3:
-        this.custom3NotLike = toUpperCopy(strings);
+        this.custom3NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_4:
-        this.custom4NotLike = toUpperCopy(strings);
+        this.custom4NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_5:
-        this.custom5NotLike = toUpperCopy(strings);
+        this.custom5NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_6:
-        this.custom6NotLike = toUpperCopy(strings);
+        this.custom6NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_7:
-        this.custom7NotLike = toUpperCopy(strings);
+        this.custom7NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_8:
-        this.custom8NotLike = toUpperCopy(strings);
+        this.custom8NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_9:
-        this.custom9NotLike = toUpperCopy(strings);
+        this.custom9NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_10:
-        this.custom10NotLike = toUpperCopy(strings);
+        this.custom10NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_11:
-        this.custom11NotLike = toUpperCopy(strings);
+        this.custom11NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_12:
-        this.custom12NotLike = toUpperCopy(strings);
+        this.custom12NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_13:
-        this.custom13NotLike = toUpperCopy(strings);
+        this.custom13NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_14:
-        this.custom14NotLike = toUpperCopy(strings);
+        this.custom14NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_15:
-        this.custom15NotLike = toUpperCopy(strings);
+        this.custom15NotLike = toLowerCopy(strings);
         break;
       case CUSTOM_16:
-        this.custom16NotLike = toUpperCopy(strings);
+        this.custom16NotLike = toLowerCopy(strings);
         break;
       default:
         throw new SystemException("Unknown custom field '" + customField + "'");
@@ -1882,7 +1882,7 @@ public class TaskQueryImpl implements TaskQuery {
 
   @Override
   public TaskQuery wildcardSearchValueLike(String wildcardSearchValue) {
-    this.wildcardSearchValueLike = wildcardSearchValue.toUpperCase();
+    this.wildcardSearchValueLike = wildcardSearchValue.toLowerCase();
     return this;
   }
   // endregion
diff --git a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQuerySqlProvider.java b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQuerySqlProvider.java
index 7dd215c04..6f0599839 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQuerySqlProvider.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQuerySqlProvider.java
@@ -444,7 +444,7 @@ public class TaskQuerySqlProvider {
     sb.append(
         "<if test='wildcardSearchValueLike != null and wildcardSearchFieldIn != null'>AND ("
             + "<foreach item='item' collection='wildcardSearchFieldIn' separator=' OR '>"
-            + "UPPER(t.${item}) "
+            + "LOWER(t.${item}) "
             + "LIKE #{wildcardSearchValueLike}"
             + "</foreach>)"
             + "</if> ");
diff --git a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketAccessItemQueryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketAccessItemQueryImpl.java
index a677eed8a..341b33d87 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketAccessItemQueryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketAccessItemQueryImpl.java
@@ -60,7 +60,7 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
 
   @Override
   public WorkbasketAccessItemQuery workbasketKeyLike(String... key) {
-    this.workbasketKeyLike = toUpperCopy(key);
+    this.workbasketKeyLike = toLowerCopy(key);
     return this;
   }
 
@@ -73,7 +73,7 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
 
   @Override
   public WorkbasketAccessItemQuery accessIdLike(String... ids) {
-    this.accessIdLike = toUpperCopy(ids);
+    this.accessIdLike = toLowerCopy(ids);
     return this;
   }
 
diff --git a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryImpl.java
index 5d5519744..8d8699789 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryImpl.java
@@ -82,37 +82,41 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery idIn(String... id) {
-    this.idIn = id;
+    if (id != null && id.length != 0) {
+      this.idIn = id;
+    }
     return this;
   }
 
   @Override
   public WorkbasketQuery keyIn(String... key) {
-    this.keyIn = toUpperCopy(key);
+    if (key != null && key.length != 0) {
+      this.keyIn = key;
+    }
     return this;
   }
 
   @Override
   public WorkbasketQuery keyLike(String... keys) {
-    this.keyLike = toUpperCopy(keys);
+    this.keyLike = toLowerCopy(keys);
     return this;
   }
 
   @Override
   public WorkbasketQuery nameIn(String... names) {
-    this.nameIn = toUpperCopy(names);
+    this.nameIn = names;
     return this;
   }
 
   @Override
   public WorkbasketQuery nameLike(String... names) {
-    this.nameLike = toUpperCopy(names);
+    this.nameLike = toLowerCopy(names);
     return this;
   }
 
   @Override
   public WorkbasketQuery keyOrNameLike(String... keysOrNames) {
-    this.keyOrNameLike = toUpperCopy(keysOrNames);
+    this.keyOrNameLike = toLowerCopy(keysOrNames);
     return this;
   }
 
@@ -144,7 +148,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery descriptionLike(String... description) {
-    this.descriptionLike = toUpperCopy(description);
+    this.descriptionLike = toLowerCopy(description);
     return this;
   }
 
@@ -156,7 +160,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery ownerLike(String... owners) {
-    this.ownerLike = toUpperCopy(owners);
+    this.ownerLike = toLowerCopy(owners);
     return this;
   }
 
@@ -221,7 +225,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery domainLike(String... domain) {
-    this.domainLike = domain;
+    this.domainLike = toLowerCopy(domain);
     return this;
   }
 
@@ -278,16 +282,16 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       WorkbasketCustomField customField, String... searchArguments) {
     switch (customField) {
       case CUSTOM_1:
-        custom1Like = toUpperCopy(searchArguments);
+        custom1Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_2:
-        custom2Like = toUpperCopy(searchArguments);
+        custom2Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_3:
-        custom3Like = toUpperCopy(searchArguments);
+        custom3Like = toLowerCopy(searchArguments);
         break;
       case CUSTOM_4:
-        custom4Like = toUpperCopy(searchArguments);
+        custom4Like = toLowerCopy(searchArguments);
         break;
       default:
         throw new SystemException("Unknown customField '" + customField + "'");
@@ -303,7 +307,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery orgLevel1Like(String... orgLevel1) {
-    this.orgLevel1Like = toUpperCopy(orgLevel1);
+    this.orgLevel1Like = toLowerCopy(orgLevel1);
     return this;
   }
 
@@ -315,7 +319,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery orgLevel2Like(String... orgLevel2) {
-    this.orgLevel2Like = toUpperCopy(orgLevel2);
+    this.orgLevel2Like = toLowerCopy(orgLevel2);
     return this;
   }
 
@@ -327,7 +331,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery orgLevel3Like(String... orgLevel3) {
-    this.orgLevel3Like = toUpperCopy(orgLevel3);
+    this.orgLevel3Like = toLowerCopy(orgLevel3);
     return this;
   }
 
@@ -339,7 +343,7 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public WorkbasketQuery orgLevel4Like(String... orgLevel4) {
-    this.orgLevel4Like = toUpperCopy(orgLevel4);
+    this.orgLevel4Like = toLowerCopy(orgLevel4);
     return this;
   }
 
diff --git a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryMapper.java b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryMapper.java
index dfc468b70..e9addd1a7 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryMapper.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryMapper.java
@@ -36,35 +36,35 @@ public interface WorkbasketQueryMapper {
           + "</if> "
           + "<where> 1=1 "
           + "<if test='ownerIn != null'>AND w.OWNER IN(<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(w.OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(w.OWNER) LIKE #{item}</foreach>)</if> "
           + "<if test='idIn != null'>AND w.ID IN(<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(w.KEY) IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(w.NAME) IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item} OR UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND w.KEY IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND w.NAME IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item} OR LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
           + "<if test='domainIn != null'>AND w.DOMAIN IN(<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
           + "<if test='type!= null'>AND w.TYPE IN(<foreach item='item' collection='type' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=' OR ' > ( <if test='item.begin!=null'> w.CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
           + "<if test='modifiedIn !=null'> AND ( <foreach item='item' collection='modifiedIn' separator=' OR ' > ( <if test='item.begin!=null'> w.MODIFIED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.MODIFIED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>UPPER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
+          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>LOWER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
           + "<if test='custom1In != null'>AND w.CUSTOM_1 IN(<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
           + "<if test='custom2In != null'>AND w.CUSTOM_2 IN(<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(w.CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(w.CUSTOM_2) LIKE #{item}</foreach>)</if> "
           + "<if test='custom3In != null'>AND w.CUSTOM_3 IN(<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
           + "<if test='custom4In != null'>AND w.CUSTOM_4 IN(<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel1In != null'>AND w.ORG_LEVEL_1 IN(<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel2In != null'>AND w.ORG_LEVEL_2 IN(<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel3In != null'>AND w.ORG_LEVEL_3 IN(<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel4In != null'>AND w.ORG_LEVEL_4 IN(<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
           + "<if test = 'joinWithAccessList'> "
           + "<if test = 'checkReadPermission'> "
           + "AND (a.MAX_READ = 1 "
@@ -124,7 +124,7 @@ public interface WorkbasketQueryMapper {
           + "<if test='idIn != null'>AND WBA.ID IN(<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='workbasketIdIn != null'>AND WORKBASKET_ID IN(<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='workbasketKeyIn != null'>AND WB.KEY IN(<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR '>UPPER(WB.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR '>LOWER(WB.KEY) LIKE #{item}</foreach>)</if> "
           + "<if test='accessIdIn != null'>AND ACCESS_ID IN(<foreach item='item' collection='accessIdIn' separator=',' >#{item}</foreach>) </if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='orderItem' collection='orderBy' separator=',' >${orderItem}</foreach></if> "
@@ -178,35 +178,35 @@ public interface WorkbasketQueryMapper {
           + "</if> "
           + "<where> 1=1 "
           + "<if test='ownerIn != null'>AND w.OWNER IN(<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(w.OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(w.OWNER) LIKE #{item}</foreach>)</if> "
           + "<if test='idIn != null'>AND w.ID IN(<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(w.KEY) IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(w.NAME) IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item} OR UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(w.KEY) IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND LOWER(w.NAME) IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item} OR LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
           + "<if test='domainIn != null'>AND w.DOMAIN IN(<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
           + "<if test='type!= null'>AND w.TYPE IN(<foreach item='item' collection='type' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=' OR ' > ( <if test='item.begin!=null'> w.CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
           + "<if test='modifiedIn !=null'> AND ( <foreach item='item' collection='modifiedIn' separator=' OR ' > ( <if test='item.begin!=null'> w.MODIFIED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.MODIFIED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>UPPER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom1In != null'>AND UPPER(w.CUSTOM_1) IN(<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom2In != null'>AND UPPER(w.CUSTOM_2) IN(<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >UPPER(w.CUSTOM_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom3In != null'>AND UPPER(w.CUSTOM_3) IN(<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='custom4In != null'>AND UPPER(w.CUSTOM_4) IN(<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel1In != null'>AND UPPER(w.ORG_LEVEL_1) IN(<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel2In != null'>AND UPPER(w.ORG_LEVEL_2) IN(<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel3In != null'>AND UPPER(w.ORG_LEVEL_3) IN(<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
-          + "<if test='orgLevel4In != null'>AND UPPER(w.ORG_LEVEL_4) IN(<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>LOWER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1In != null'>AND LOWER(w.CUSTOM_1) IN(<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom2In != null'>AND LOWER(w.CUSTOM_2) IN(<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom2Like != null'>AND (<foreach item='item' collection='custom2Like' separator=' OR ' >LOWER(w.CUSTOM_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3In != null'>AND LOWER(w.CUSTOM_3) IN(<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4In != null'>AND LOWER(w.CUSTOM_4) IN(<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1In != null'>AND LOWER(w.ORG_LEVEL_1) IN(<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2In != null'>AND LOWER(w.ORG_LEVEL_2) IN(<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3In != null'>AND LOWER(w.ORG_LEVEL_3) IN(<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4In != null'>AND LOWER(w.ORG_LEVEL_4) IN(<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
           + "<if test = 'joinWithAccessList'> "
           + "<if test = 'checkReadPermission'> "
           + "AND (a.MAX_READ = 1 "
@@ -273,34 +273,34 @@ public interface WorkbasketQueryMapper {
           + "<where>"
           + "1=1 "
           + "<if test='ownerIn != null'>AND w.OWNER IN(<foreach item='item' collection='ownerIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >UPPER(w.OWNER) LIKE #{item}</foreach>)</if> "
+          + "<if test='ownerLike != null'>AND (<foreach item='item' collection='ownerLike' separator=' OR ' >LOWER(w.OWNER) LIKE #{item}</foreach>)</if> "
           + "<if test='idIn != null'>AND w.ID IN(<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyIn != null'>AND UPPER(w.KEY) IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
-          + "<if test='nameIn != null'>AND UPPER(w.NAME) IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item}</foreach>)</if> "
-          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >UPPER(w.NAME) LIKE #{item} OR UPPER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyIn != null'>AND LOWER(w.KEY) IN(<foreach item='item' collection='keyIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='keyLike != null'>AND (<foreach item='item' collection='keyLike' separator=' OR ' >LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='nameIn != null'>AND LOWER(w.NAME) IN(<foreach item='item' collection='nameIn' separator=',' >#{item}</foreach>)</if> "
+          + "<if test='nameLike != null'>AND (<foreach item='item' collection='nameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item}</foreach>)</if> "
+          + "<if test='keyOrNameLike != null'>AND (<foreach item='item' collection='keyOrNameLike' separator=' OR ' >LOWER(w.NAME) LIKE #{item} OR LOWER(w.KEY) LIKE #{item}</foreach>)</if> "
           + "<if test='domainIn != null'>AND w.DOMAIN IN(<foreach item='item' collection='domainIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >UPPER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
+          + "<if test='domainLike != null'>AND (<foreach item='item' collection='domainLike' separator=' OR ' >LOWER(w.DOMAIN) LIKE #{item}</foreach>)</if> "
           + "<if test='type!= null'>AND w.TYPE IN(<foreach item='item' collection='type' separator=',' >#{item}</foreach>)</if> "
           + "<if test='createdIn !=null'> AND ( <foreach item='item' collection='createdIn' separator=' OR ' > ( <if test='item.begin!=null'> w.CREATED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.CREATED &lt;=#{item.end} </if>)</foreach>)</if> "
           + "<if test='modifiedIn !=null'> AND ( <foreach item='item' collection='modifiedIn' separator=' OR ' > ( <if test='item.begin!=null'> w.MODIFIED &gt;= #{item.begin} </if> <if test='item.begin!=null and item.end!=null'> AND </if><if test='item.end!=null'> w.MODIFIED &lt;=#{item.end} </if>)</foreach>)</if> "
-          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>UPPER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
+          + "<if test='descriptionLike != null'>AND (<foreach item='item' collection='descriptionLike' separator=' OR '>LOWER(w.DESCRIPTION) LIKE #{item}</foreach>)</if> "
           + "<if test='custom1In != null'>AND w.CUSTOM_1 IN(<foreach item='item' collection='custom1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >UPPER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom1Like != null'>AND (<foreach item='item' collection='custom1Like' separator=' OR ' >LOWER(w.CUSTOM_1) LIKE #{item}</foreach>)</if> "
           + "<if test='custom2In != null'>AND w.CUSTOM_2 IN(<foreach item='item' collection='custom2In' separator=',' >#{item}</foreach>)</if> "
           + "<if test='custom3In != null'>AND w.CUSTOM_3 IN(<foreach item='item' collection='custom3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >UPPER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom3Like != null'>AND (<foreach item='item' collection='custom3Like' separator=' OR ' >LOWER(w.CUSTOM_3) LIKE #{item}</foreach>)</if> "
           + "<if test='custom4In != null'>AND w.CUSTOM_4 IN(<foreach item='item' collection='custom4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >UPPER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='custom4Like != null'>AND (<foreach item='item' collection='custom4Like' separator=' OR ' >LOWER(w.CUSTOM_4) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel1In != null'>AND w.ORG_LEVEL_1 IN(<foreach item='item' collection='orgLevel1In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >UPPER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel1Like != null'>AND (<foreach item='item' collection='orgLevel1Like' separator=' OR ' >LOWER(w.ORG_LEVEL_1) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel2In != null'>AND w.ORG_LEVEL_2 IN(<foreach item='item' collection='orgLevel2In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >UPPER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel2Like != null'>AND (<foreach item='item' collection='orgLevel2Like' separator=' OR ' >LOWER(w.ORG_LEVEL_2) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel3In != null'>AND w.ORG_LEVEL_3 IN(<foreach item='item' collection='orgLevel3In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >UPPER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel3Like != null'>AND (<foreach item='item' collection='orgLevel3Like' separator=' OR ' >LOWER(w.ORG_LEVEL_3) LIKE #{item}</foreach>)</if> "
           + "<if test='orgLevel4In != null'>AND w.ORG_LEVEL_4 IN(<foreach item='item' collection='orgLevel4In' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >UPPER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
+          + "<if test='orgLevel4Like != null'>AND (<foreach item='item' collection='orgLevel4Like' separator=' OR ' >LOWER(w.ORG_LEVEL_4) LIKE #{item}</foreach>)</if> "
           + "<if test='markedForDeletion != null'>AND w.MARKED_FOR_DELETION = #{markedForDeletion}</if> "
           + "<if test = 'joinWithAccessList'> "
           + "<if test = 'checkReadPermission'> "
@@ -350,7 +350,7 @@ public interface WorkbasketQueryMapper {
           + "<if test='idIn != null'>AND ID IN(<foreach item='item' collection='idIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='workbasketIdIn != null'>AND WORKBASKET_ID IN(<foreach item='item' collection='workbasketIdIn' separator=',' >#{item}</foreach>)</if> "
           + "<if test='workbasketKeyIn != null'>AND WB.KEY IN(<foreach item='item' collection='workbasketKeyIn' separator=',' >#{item}</foreach>)</if> "
-          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR '>UPPER(WB.KEY) LIKE #{item}</foreach>)</if> "
+          + "<if test='workbasketKeyLike != null'>AND (<foreach item='item' collection='workbasketKeyLike' separator=' OR '>LOWER(WB.KEY) LIKE #{item}</foreach>)</if> "
           + "<if test='accessIdIn != null'>AND ACCESS_ID IN(<foreach item='item' collection='accessIdIn' separator=',' >#{item}</foreach>) </if> "
           + "</where>"
           + "<if test='!orderBy.isEmpty()'>ORDER BY <foreach item='orderItem' collection='orderBy' separator=',' >${orderItem}</foreach></if> "
diff --git a/lib/taskana-core/src/test/java/acceptance/jobs/WorkbasketCleanupJobAccTest.java b/lib/taskana-core/src/test/java/acceptance/jobs/WorkbasketCleanupJobAccTest.java
index e3cbc15fb..0ce3f030b 100644
--- a/lib/taskana-core/src/test/java/acceptance/jobs/WorkbasketCleanupJobAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/jobs/WorkbasketCleanupJobAccTest.java
@@ -37,7 +37,7 @@ class WorkbasketCleanupJobAccTest extends AbstractAccTest {
   @Test
   void shouldCleanWorkbasketMarkedForDeletionWithoutTasks() throws Exception {
     long totalWorkbasketCount = workbasketService.createWorkbasketQuery().count();
-    assertThat(totalWorkbasketCount).isEqualTo(25);
+    assertThat(totalWorkbasketCount).isEqualTo(26);
     List<WorkbasketSummary> workbaskets =
         workbasketService
             .createWorkbasketQuery()
@@ -61,14 +61,14 @@ class WorkbasketCleanupJobAccTest extends AbstractAccTest {
     workbasketCleanupJob.run();
 
     totalWorkbasketCount = workbasketService.createWorkbasketQuery().count();
-    assertThat(totalWorkbasketCount).isEqualTo(24);
+    assertThat(totalWorkbasketCount).isEqualTo(25);
   }
 
   @WithAccessId(user = "admin")
   @Test
   void shouldNotCleanWorkbasketMarkedForDeletionIfWorkbasketHasTasks() throws Exception {
     long totalWorkbasketCount = workbasketService.createWorkbasketQuery().count();
-    assertThat(totalWorkbasketCount).isEqualTo(25);
+    assertThat(totalWorkbasketCount).isEqualTo(26);
     List<WorkbasketSummary> workbaskets =
         workbasketService
             .createWorkbasketQuery()
@@ -85,7 +85,7 @@ class WorkbasketCleanupJobAccTest extends AbstractAccTest {
     job.run();
 
     totalWorkbasketCount = workbasketService.createWorkbasketQuery().count();
-    assertThat(totalWorkbasketCount).isEqualTo(25);
+    assertThat(totalWorkbasketCount).isEqualTo(26);
   }
 
   @WithAccessId(user = "admin")
diff --git a/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketAccTest.java b/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketAccTest.java
index 79ab2f2da..57c862b6d 100644
--- a/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketAccTest.java
@@ -49,7 +49,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
   void testQueryAllForBusinessAdminMultipleTimes() {
     WorkbasketQuery query = WORKBASKET_SERVICE.createWorkbasketQuery();
     int count = (int) query.count();
-    assertThat(count).isEqualTo(25);
+    assertThat(count).isEqualTo(26);
     List<WorkbasketSummary> workbaskets = query.list();
     assertThat(workbaskets).hasSize(count);
     workbaskets = query.list();
@@ -61,7 +61,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
   void testQueryAllForAdminMultipleTimes() {
     WorkbasketQuery query = WORKBASKET_SERVICE.createWorkbasketQuery();
     int count = (int) query.count();
-    assertThat(count).isEqualTo(25);
+    assertThat(count).isEqualTo(26);
     List<WorkbasketSummary> workbaskets = query.list();
     assertThat(workbaskets).hasSize(count);
     workbaskets = query.list();
@@ -106,7 +106,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
 
   @WithAccessId(user = "teamlead-1", groups = GROUP_1_DN)
   @Test
-  void testQueryWorkbasketByName() {
+  void should_ReturnWorkbasketsMatchingName_When_QueriedWithNameIn() {
     List<WorkbasketSummary> results =
         WORKBASKET_SERVICE.createWorkbasketQuery().nameIn("Gruppenpostkorb KSC").list();
     assertThat(results)
@@ -116,6 +116,18 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
         .isEqualTo("GPK_KSC");
   }
 
+  @WithAccessId(user = "admin", groups = GROUP_1_DN)
+  @Test
+  void should_ReturnWorkbasketsMatchingName_When_QueriedWithNameLikeWithEszett() {
+    List<WorkbasketSummary> results =
+        WORKBASKET_SERVICE.createWorkbasketQuery().nameLike("%ß%").list();
+    assertThat(results)
+        .hasSize(1)
+        .first()
+        .extracting(WorkbasketSummary::getKey)
+        .isEqualTo("MASSNAHMEN");
+  }
+
   @WithAccessId(user = "teamlead-1", groups = GROUP_1_DN)
   @Test
   void testQueryWorkbasketByNameStartsWith() {
@@ -190,7 +202,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
     List<WorkbasketSummary> results =
         WORKBASKET_SERVICE
             .createWorkbasketQuery()
-            .keyIn("GPK_KSC_1", "GPK_Ksc", "GPK_KSC_3")
+            .keyIn("GPK_KSC_1", "GPK_KSC", "GPK_KSC_3")
             .list();
     assertThat(results).hasSize(2);
   }
@@ -297,7 +309,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
     List<WorkbasketSummary> results =
         WORKBASKET_SERVICE.createWorkbasketQuery().nameLike("%").orderByName(DESCENDING).list();
     assertThat(results)
-        .hasSize(25)
+        .hasSize(26)
         .extracting(WorkbasketSummary::getName)
         .isSortedAccordingTo(CASE_INSENSITIVE_ORDER.reversed());
 
@@ -449,7 +461,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
   void testQueryForOrgLevl1In() {
     List<WorkbasketSummary> results =
         WORKBASKET_SERVICE.createWorkbasketQuery().orgLevel1In("orgl1", "").list();
-    assertThat(results).hasSize(24);
+    assertThat(results).hasSize(25);
   }
 
   @WithAccessId(user = "admin")
@@ -505,7 +517,7 @@ class QueryWorkbasketAccTest extends AbstractAccTest {
   void testQueryForOrgLevel4Like() {
     List<WorkbasketSummary> results =
         WORKBASKET_SERVICE.createWorkbasketQuery().orgLevel4Like("%").list();
-    assertThat(results).hasSize(25);
+    assertThat(results).hasSize(26);
   }
 
   @WithAccessId(user = "admin")
diff --git a/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketByPermissionAccTest.java b/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketByPermissionAccTest.java
index 242c7b7ae..4b9b33e30 100644
--- a/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketByPermissionAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/workbasket/QueryWorkbasketByPermissionAccTest.java
@@ -157,6 +157,6 @@ class QueryWorkbasketByPermissionAccTest extends AbstractAccTest {
             .createWorkbasketQuery()
             .callerHasPermission(WorkbasketPermission.OPEN)
             .list();
-    assertThat(results).hasSize(25);
+    assertThat(results).hasSize(26);
   }
 }
diff --git a/lib/taskana-core/src/test/java/acceptance/workbasket/WorkbasketQueryAccTest.java b/lib/taskana-core/src/test/java/acceptance/workbasket/WorkbasketQueryAccTest.java
index 59552a503..79ce829d6 100644
--- a/lib/taskana-core/src/test/java/acceptance/workbasket/WorkbasketQueryAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/workbasket/WorkbasketQueryAccTest.java
@@ -67,7 +67,7 @@ class WorkbasketQueryAccTest extends AbstractAccTest {
     WorkbasketService workbasketService = taskanaEngine.getWorkbasketService();
     List<WorkbasketSummary> results =
         workbasketService.createWorkbasketQuery().nameLike("%").list();
-    assertThat(results).hasSize(25);
+    assertThat(results).hasSize(26);
 
     results =
         workbasketService
@@ -86,7 +86,7 @@ class WorkbasketQueryAccTest extends AbstractAccTest {
     WorkbasketService workbasketService = taskanaEngine.getWorkbasketService();
     List<WorkbasketSummary> results =
         workbasketService.createWorkbasketQuery().nameLike("%").list();
-    assertThat(results).hasSize(25);
+    assertThat(results).hasSize(26);
 
     results =
         workbasketService