Ported https://github.com/Activiti/Activiti/commit/35a4a860ab66f19ddaaaf913f0c493a6ef370178 to v6

modules/activiti-engine/src/main/java/org/activiti/engine/history/HistoricProcessInstanceQuery.java

@@ -180,6 +180,16 @@ public interface HistoricProcessInstanceQuery extends Query<HistoricProcessInsta
    *          cannot be null. The string can include the wildcard character '%' to express like-strategy: starts with (string%), ends with (%string) or contains (%string%).
    */
   HistoricProcessInstanceQuery variableValueLike(String name, String value);
+  
+  /** Only select process instances which had global variable value like (case insensitive)
+   * the given value when they ended. Only applies to already ended process instances,
+   * otherwise use a {@link ProcessInstanceQuery} instead! This can be used on string
+   * variables only.
+   * @param name cannot be null.
+   * @param value cannot be null. The string can include the
+   *          wildcard character '%' to express like-strategy: starts with
+   *          (string%), ends with (%string) or contains (%string%). */
+  HistoricProcessInstanceQuery variableValueLikeIgnoreCase(String name, String value);
 
   /**
    * Only select historic process instances that were started before the given date.

modules/activiti-engine/src/main/java/org/activiti/engine/impl/AbstractVariableQueryImpl.java

@@ -156,7 +156,13 @@ public abstract class AbstractVariableQueryImpl<T extends Query<?, ?>, U> extend
     addVariable(name, value, QueryOperator.LIKE, localScope);
     return (T) this;
   }
-
+  
+  @SuppressWarnings("unchecked")
+  public T variableValueLikeIgnoreCase(String name, String value, boolean localScope) {
+    addVariable(name, value, QueryOperator.LIKE_IGNORE_CASE, localScope);
+    return (T)this;
+  }
+  
   private void addVariable(String name, Object value, QueryOperator operator, boolean localScope) {
     if (name == null) {
       throw new ActivitiIllegalArgumentException("name is null");
@@ -182,8 +188,9 @@ public abstract class AbstractVariableQueryImpl<T extends Query<?, ?>, U> extend
       if (operator == QueryOperator.NOT_EQUALS_IGNORE_CASE && !(value instanceof String)) {
         throw new ActivitiIllegalArgumentException("Only string values can be used with 'not equals ignore case' condition");
       }
-
-      if (operator == QueryOperator.LIKE && !(value instanceof String)) {
+      
+      if((operator == QueryOperator.LIKE || operator == QueryOperator.LIKE_IGNORE_CASE) && !(value instanceof String))
+      {
         throw new ActivitiIllegalArgumentException("Only string values can be used with 'like' condition");
       }
     }

modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricProcessInstanceQueryImpl.java

@@ -454,7 +454,7 @@ public class HistoricProcessInstanceQueryImpl extends AbstractVariableQueryImpl<
       return variableValueLike(name, value, true);
     }
   }
-  
+
   public HistoricProcessInstanceQuery locale(String locale) {
     this.locale = locale;
     return this;
@@ -464,7 +464,17 @@ public class HistoricProcessInstanceQueryImpl extends AbstractVariableQueryImpl<
     withLocalizationFallback = true;
     return this;
   }
-
+  
+  @Override
+  public HistoricProcessInstanceQuery variableValueLikeIgnoreCase(String name, String value) {
+    if (inOrStatement) {
+      currentOrQueryObject.variableValueLikeIgnoreCase(name, value, true);
+      return this;
+    } else {
+      return variableValueLikeIgnoreCase(name, value, true);
+    }
+  }
+  
   public HistoricProcessInstanceQuery or() {
     if (inOrStatement) {
       throw new ActivitiException("the query is already in an or statement");

modules/activiti-engine/src/main/java/org/activiti/engine/impl/QueryOperator.java

@@ -19,5 +19,14 @@ package org.activiti.engine.impl;
  * @author Frederik Heremans
  */
 public enum QueryOperator {
-  EQUALS, NOT_EQUALS, GREATER_THAN, GREATER_THAN_OR_EQUAL, LESS_THAN, LESS_THAN_OR_EQUAL, LIKE, EQUALS_IGNORE_CASE, NOT_EQUALS_IGNORE_CASE,
+  EQUALS,
+  NOT_EQUALS,
+  GREATER_THAN,
+  GREATER_THAN_OR_EQUAL,
+  LESS_THAN,
+  LESS_THAN_OR_EQUAL,
+  LIKE,
+  EQUALS_IGNORE_CASE,
+  NOT_EQUALS_IGNORE_CASE,
+  LIKE_IGNORE_CASE,
 }

modules/activiti-engine/src/main/resources/org/activiti/db/mapping/entity/HistoricProcessInstance.xml

@@ -461,7 +461,7 @@
         </if>
         <if test="queryVariableValue.textValue != null &amp;&amp; queryVariableValue.longValue == null &amp;&amp; queryVariableValue.doubleValue == null">
           <choose>
-            <when test="queryVariableValue.operator.equals('EQUALS_IGNORE_CASE') || queryVariableValue.operator.equals('NOT_EQUALS_IGNORE_CASE')">
+            <when test="queryVariableValue.operator.equals('EQUALS_IGNORE_CASE') || queryVariableValue.operator.equals('NOT_EQUALS_IGNORE_CASE') || queryVariableValue.operator.equals('LIKE_IGNORE_CASE')">
               and lower(A${index}.TEXT_)
             </when>
             <otherwise>
@@ -469,7 +469,7 @@
             </otherwise>
           </choose>
           <choose>
-            <when test="queryVariableValue.operator.equals('LIKE')">LIKE</when>
+            <when test="queryVariableValue.operator.equals('LIKE') || queryVariableValue.operator.equals('LIKE_IGNORE_CASE')">LIKE</when>
             <otherwise><include refid="executionVariableOperator" /></otherwise>
           </choose>
           #{queryVariableValue.textValue}