#1619 - Support aggregation formula on fetch clause e.g. query.fetch("machineUsage", "sum(totalKms)")

src/main/java/io/ebeaninternal/server/query/SqlTreeProperties.java

@@ -92,6 +92,13 @@ public class SqlTreeProperties {
     return aggregation;
   }
 
+  /**
+   * Check for aggregation (need for groug by clause).
+   */
+  public void checkAggregation() {
+    aggregationJoin();
+  }
+
   /**
    * Return the property to join for aggregation.
    */