=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/common/QueryItem.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/common/QueryItem.java	2013-12-06 15:16:51 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/common/QueryItem.java	2013-12-06 15:47:52 +0000
@@ -54,6 +54,8 @@
     private String operator;
 
     private String filter;
+    
+    private boolean numeric;
 
     // -------------------------------------------------------------------------
     // Constructors
@@ -64,11 +66,12 @@
         this.item = item;
     }
     
-    public QueryItem( IdentifiableObject item, String operator, String filter )
+    public QueryItem( IdentifiableObject item, String operator, String filter, boolean numeric )
     {
         this.item = item;
         this.operator = operator;
         this.filter = filter;
+        this.numeric = numeric;
     }
 
     // -------------------------------------------------------------------------
@@ -157,4 +160,14 @@
     {
         this.filter = filter;
     }
+
+    public boolean isNumeric()
+    {
+        return numeric;
+    }
+
+    public void setNumeric( boolean numeric )
+    {
+        this.numeric = numeric;
+    }
 }

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/DefaultEventAnalyticsService.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/DefaultEventAnalyticsService.java	2013-12-06 15:16:51 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/DefaultEventAnalyticsService.java	2013-12-06 15:47:52 +0000
@@ -488,21 +488,21 @@
         
         if ( de != null && program.getAllDataElements().contains( de ) )
         {
-            return new QueryItem( de, operator, filter );
+            return new QueryItem( de, operator, filter, de.isNumericType() );
         }
         
         PatientAttribute at = attributeService.getPatientAttribute( item );
         
         if ( at != null && program.getPatientAttributes().contains( at ) )
         {
-            return new QueryItem( at, operator, filter );
+            return new QueryItem( at, operator, filter, at.isNumericType() );
         }
         
         PatientIdentifierType it = identifierTypeService.getPatientIdentifierType( item );
         
         if ( it != null && program.getPatientIdentifierTypes().contains( it ) )
         {
-            return new QueryItem( it, operator, filter );
+            return new QueryItem( it, operator, filter, false );
         }
         
         throw new IllegalQueryException( "Item identifier does not reference any item part of the program: " + item );           

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/JdbcEventAnalyticsManager.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/JdbcEventAnalyticsManager.java	2013-12-06 14:42:43 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/JdbcEventAnalyticsManager.java	2013-12-06 15:47:52 +0000
@@ -376,16 +376,16 @@
         for ( QueryItem item : params.getItems() )
         {
             if ( item.hasFilter() )
-            {                
-                sql += "and " + statementBuilder.columnQuote( item.getItem().getUid() ) + " " + item.getSqlOperator() + " " + getSqlFilter( item ) + " ";
+            {
+                sql += "and " + getColumn( item ) + " " + item.getSqlOperator() + " " + getSqlFilter( item ) + " ";
             }
         }
         
         for ( QueryItem filter : params.getItemFilters() )
         {
             if ( filter.hasFilter() )
-            {                
-                sql += "and " + statementBuilder.columnQuote( filter.getItem().getUid() ) + " " + filter.getSqlOperator() + " " + getSqlFilter( filter ) + " ";
+            {
+                sql += "and " + getColumn( filter ) + " " + filter.getSqlOperator() + " " + getSqlFilter( filter ) + " ";
             }
         }
 
@@ -393,6 +393,16 @@
     }
     
     /**
+     * Returns an encoded column name wrapped in lower directive if not numeric.
+     */
+    private String getColumn( QueryItem item )
+    {
+        String col = statementBuilder.columnQuote( item.getItem().getUid() );
+        
+        return item.isNumeric() ? col : "lower(" + col + ")"; 
+    }
+    
+    /**
      * Returns the filter value for the given query item.
      */
     private String getSqlFilter( QueryItem item )