=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/analytics/AggregationType.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/analytics/AggregationType.java	2015-08-02 13:30:47 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/analytics/AggregationType.java	2015-08-20 20:05:43 +0000
@@ -59,6 +59,11 @@
         this.value = value;
     }
 
+    public String getValue()
+    {
+        return value;
+    }
+
     public static AggregationType fromValue( String value )
     {
         for ( AggregationType type : AggregationType.values() )

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/EventQueryParams.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/EventQueryParams.java	2015-08-20 16:24:05 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/EventQueryParams.java	2015-08-20 20:05:43 +0000
@@ -287,7 +287,7 @@
     /**
      * Returns the aggregation type for this query, first by looking at the
      * aggregation type of the query, second by looking at the aggregation type
-     * of the value dimension.
+     * of the value dimension, third by returning AVERAGE;
      */
     public AggregationType getAggregationTypeFallback()
     {
@@ -300,7 +300,7 @@
             return value.getAggregationType();
         }
         
-        return null;
+        return AggregationType.AVERAGE;
     }
 
     /**

=== 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	2015-08-09 19:05:08 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/event/data/JdbcEventAnalyticsManager.java	2015-08-20 20:05:43 +0000
@@ -28,12 +28,6 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import static org.hisp.dhis.analytics.AggregationType.COUNT;
-import static org.hisp.dhis.analytics.AggregationType.MAX;
-import static org.hisp.dhis.analytics.AggregationType.MIN;
-import static org.hisp.dhis.analytics.AggregationType.STDDEV;
-import static org.hisp.dhis.analytics.AggregationType.SUM;
-import static org.hisp.dhis.analytics.AggregationType.VARIANCE;
 import static org.hisp.dhis.common.DimensionalObject.ORGUNIT_DIM_ID;
 import static org.hisp.dhis.common.DimensionalObject.PERIOD_DIM_ID;
 import static org.hisp.dhis.common.IdentifiableObjectUtils.getUids;
@@ -324,34 +318,9 @@
         {
             String column = statementBuilder.columnQuote( params.getValue().getUid() );
             
-            if ( params.isAggregationType( SUM ) )
-            {
-                return "sum(" + column + ")";
-            }
-            else if ( params.isAggregationType( COUNT ) )
-            {
-                return "count(" + column + ")";
-            }
-            else if ( params.isAggregationType( STDDEV ) )
-            {
-                return "stddev(" + column + ")";
-            }
-            else if ( params.isAggregationType( VARIANCE ) )
-            {
-                return "variance(" + column + ")";
-            }
-            else if ( params.isAggregationType( MIN ) )
-            {
-                return "min(" + column + ")";
-            }
-            else if ( params.isAggregationType( MAX ) )
-            {
-                return "max(" + column + ")";
-            }
-            else // AVERAGE
-            {
-                return "avg(" + column + ")";
-            }
+            String function = params.getAggregationTypeFallback().getValue();
+            
+            return function + "(" + column + ")";
         }
         else
         {