Adding HAVING clause support to generic query generator

lib/dialects/abstract/query-generator.js

@@ -703,6 +703,16 @@ module.exports = (function() {
           mainQueryItems.push(" GROUP BY " + options.group)
         }
       }
+      
+      // Add HAVING to sub or main query
+      if (options.hasOwnProperty('having')) {
+        options.having = this.getWhereConditions(options.having, tableName, factory, options)
+        if (subQuery) {
+          subQueryItems.push(" HAVING " + options.having)
+        } else {
+          mainQueryItems.push(" HAVING " + options.having)
+        }
+      }
 
       // Add ORDER to sub or main query
       if (options.order) {
@@ -715,7 +725,6 @@ module.exports = (function() {
         }
       }
 
-
       var limitOrder = this.addLimitAndOffset(options, query)
 
       // Add LIMIT, OFFSET to sub or main query