fix: fix no group slimit issue and test cases

source/libs/executor/src/projectoperator.c

@@ -174,9 +174,13 @@ static int32_t setInfoForNewGroup(SSDataBlock* pBlock, SLimitInfo* pLimitInfo, S
   // here check for a new group data, we need to handle the data of the previous group.
   ASSERT(pLimitInfo->remainGroupOffset == 0 || pLimitInfo->remainGroupOffset == -1);
 
-  if (pLimitInfo->currentGroupId == 0 || pLimitInfo->currentGroupId != pBlock->info.id.groupId) {
+  bool newGroup = false;
+  if (0 == pBlock->info.id.groupId) {
+    pLimitInfo->numOfOutputGroups = 1;
+  } else if (pLimitInfo->currentGroupId != pBlock->info.id.groupId) {
     pLimitInfo->currentGroupId = pBlock->info.id.groupId;
     pLimitInfo->numOfOutputGroups += 1;
+    newGroup = true;
   } else {
     return PROJECT_RETRIEVE_CONTINUE;
   }
@@ -185,11 +189,13 @@ static int32_t setInfoForNewGroup(SSDataBlock* pBlock, SLimitInfo* pLimitInfo, S
     setOperatorCompleted(pOperator);
     return PROJECT_RETRIEVE_DONE;
   }
-  
+
   // reset the value for a new group data
   // existing rows that belongs to previous group.
-  resetLimitInfoForNextGroup(pLimitInfo);
-
+  if (newGroup) {
+    resetLimitInfoForNextGroup(pLimitInfo);
+  }
+  
   return PROJECT_RETRIEVE_CONTINUE;
 }
 

tests/script/tsim/parser/limit1_stb.sim

@@ -484,6 +484,7 @@ if $rows != 2 then
   return -1
 endi
 
+print === select max(c1), min(c2), avg(c3), sum(c5), spread(c6), first(c7), last(c8), first(c9) from $stb where ts >= $ts0 and ts <= $tsu and t1 > 1 and t1 < 5 and c1 > 0 and c2 < 9 and c3 > 1 and c4 < 7 and c5 > 4 partition by t1 interval(5m) limit 1 offset 0
 sql select max(c1), min(c2), avg(c3), sum(c5), spread(c6), first(c7), last(c8), first(c9) from $stb where ts >= $ts0 and ts <= $tsu and t1 > 1 and t1 < 5 and c1 > 0 and c2 < 9 and c3 > 1 and c4 < 7 and c5 > 4 partition by t1 interval(5m) limit 1 offset 0
 if $rows != 3 then
   return -1

tests/script/tsim/parser/slimit1_query.sim

@@ -70,7 +70,7 @@ endi
 
 ### empty result set
 sql select count(*) from stb partition by t2,t1 order by t2 asc slimit 0 soffset 0
-if $rows != 9 then
+if $rows != 0 then
   return -1
 endi