add group by tagname support before fixing coredump

src/client/src/tscSQLParser.c

@@ -7201,6 +7201,7 @@ int32_t doFunctionsCompatibleCheck(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, char*
       }
 
       if (IS_MULTIOUTPUT(aAggs[f].status) && f != TSDB_FUNC_TOP && f != TSDB_FUNC_BOTTOM && f != TSDB_FUNC_DIFF &&
+          f != TSDB_FUNC_MAVG && f != TSDB_FUNC_CSUM && f != TSDB_FUNC_SAMPLE &&
           f != TSDB_FUNC_DERIVATIVE && f != TSDB_FUNC_TAGPRJ && f != TSDB_FUNC_PRJ) {
         return invalidOperationMsg(msg, msg1);
       }

src/client/src/tscUtil.c

@@ -612,7 +612,9 @@ bool isSimpleAggregateRv(SQueryInfo* pQueryInfo) {
     }
 
     if ((!IS_MULTIOUTPUT(aAggs[functionId].status)) ||
-        (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_TS_COMP)) {
+        (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM ||
+         functionId == TSDB_FUNC_TS_COMP ||
+         functionId == TSDB_FUNC_SAMPLE)) {
       return true;
     }
   }

src/query/src/qAggMain.c

@@ -4771,6 +4771,7 @@ static void sample_func_finalizer(SQLFunctionCtx *pCtx) {
     assert(pResInfo->hasResult != DATA_SET_FLAG);
   }
 
+  pResInfo->numOfRes = pRes->numSampled;
   GET_TRUE_DATA_TYPE();
   copySampleFuncRes(pCtx, type);
 

src/query/src/qUtil.c

@@ -33,7 +33,9 @@ typedef struct SCompSupporter {
 int32_t getRowNumForMultioutput(SQueryAttr* pQueryAttr, bool topBottomQuery, bool stable) {
   if (pQueryAttr && (!stable)) {
     for (int16_t i = 0; i < pQueryAttr->numOfOutput; ++i) {
-      if (pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_TOP || pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_BOTTOM) {
+      if (pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_TOP ||
+          pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_BOTTOM ||
+          pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_SAMPLE) {
         return (int32_t)pQueryAttr->pExpr1[i].base.param[0].i64;
       }
     }