[td-14493] fix bug found by regression test.

source/libs/executor/src/executorimpl.c

@@ -3139,11 +3139,6 @@ void finalizeMultiTupleQueryResult(SqlFunctionCtx* pCtx, int32_t numOfOutput, SD
     }
 
     releaseBufPage(pBuf, bufPage);
-    /*
-     * set the number of output results for group by normal columns, the number of output rows usually is 1 except
-     * the top and bottom query
-     */
-    //    buf->numOfRows = (uint16_t)getNumOfResult(pCtx, numOfOutput);
   }
 }
 

source/libs/function/src/builtinsimpl.c

@@ -48,11 +48,11 @@ bool functionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo) {
   return true;
 }
 
-static void doFinalizer(SResultRowEntryInfo* pResInfo) { cleanupResultRowEntry(pResInfo); }
-
 void functionFinalize(SqlFunctionCtx *pCtx) {
   SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
-  doFinalizer(pResInfo);
+
+  cleanupResultRowEntry(pResInfo);
+  pResInfo->isNullRes = (pResInfo->numOfRes == 0)? 1:0;
 }
 
 bool getCountFuncEnv(SFunctionNode* UNUSED_PARAM(pFunc), SFuncExecEnv* pEnv) {

tests/script/tsim/query/interval-offset.sim

@@ -206,7 +206,7 @@ if $data02 != 2678400000 then
 endi
 
 sql select  _wstartts, count(tbcol), _wduration, _wstartts, count(*) from ct3 interval(1n, 1w) sliding(2w)
-print ===> select count(tbcol), sum(tbcol), max(tbcol), min(tbcol), count(*) from ct3 interval(1n, 1w) sliding(2w)
+print ===> select  _wstartts, count(tbcol), _wduration, _wstartts, count(*) from ct3 interval(1n, 1w) sliding(2w)
 print ===> rows: $rows
 print ===> rows0: $data00 $data01 $data02 $data03 $data04
 print ===> rows1: $data10 $data11 $data12 $data13 $data14
@@ -219,6 +219,7 @@ if $data00 != @21-11-30 08:00:00.000@ then
   return -1
 endi
 if $data01 != NULL then
+  print expect null, actual: $data01
   return -1
 endi
 if $data31 != $data34 then