support having

src/query/src/qExecutor.c

@@ -213,6 +213,10 @@ bool doFilterData(SQuery *pQuery, int32_t elemPos) {
   return true;
 }
 
+bool doFilterDataOnce() {
+
+}
+
 int64_t getNumOfResult(SQueryRuntimeEnv *pRuntimeEnv) {
   SQuery *pQuery = pRuntimeEnv->pQuery;
   bool    hasMainFunction = hasMainOutput(pQuery);