Sql_lib: SqlBuilder could not create a selectDistinctClause correctly

process/Sql_lib/process.js

@@ -993,7 +993,7 @@ SqlBuilder.prototype.select = function(pFields)
  */
 SqlBuilder.prototype.selectDistinct = function (pFields)
 {
-    this._select = this._getClause(pFields, "select distinct", true);
+    this._select = SqlBuilder._getStatement(pFields, "select distinct", undefined, true, true);
     return this;
 }