fix: do not performace table count scan optimized where there are no agg functions

source/libs/planner/src/planOptimizer.c

@@ -2530,7 +2530,9 @@ static bool tbCntScanOptIsEligibleAggFuncs(SNodeList* pAggFuncs) {
 }
 
 static bool tbCntScanOptIsEligibleAgg(SAggLogicNode* pAgg) {
-  return tbCntScanOptIsEligibleGroupKeys(pAgg->pGroupKeys) && tbCntScanOptIsEligibleAggFuncs(pAgg->pAggFuncs);
+  return tbCntScanOptIsEligibleGroupKeys(pAgg->pGroupKeys) &&
+         (NULL != pAgg->pAggFuncs) && 
+         tbCntScanOptIsEligibleAggFuncs(pAgg->pAggFuncs);
 }
 
 static bool tbCntScanOptGetColValFromCond(SOperatorNode* pOper, SColumnNode** pCol, SValueNode** pVal) {

tests/script/tsim/query/tableCount.sim

@@ -104,4 +104,9 @@ if $data62 != 5 then
   return -1
 endi
 
+sql select distinct db_name from information_schema.ins_tables;
+print $rows
+if $rows != 4 then
+  return -1
+endi
 system sh/exec.sh -n dnode1 -s stop -x SIGINT