diff --git a/source/libs/executor/src/timesliceoperator.c b/source/libs/executor/src/timesliceoperator.c
index 4d519f82f1..e1782107f4 100644
--- a/source/libs/executor/src/timesliceoperator.c
+++ b/source/libs/executor/src/timesliceoperator.c
@@ -38,6 +38,8 @@ typedef struct STimeSliceOperatorInfo {
   struct SFillColInfo* pFillColInfo;  // fill column info
   int64_t              prevTs;
   bool                 prevTsSet;
+  uint64_t             groupId;
+  SSDataBlock*         pNextGroupRes;
 } STimeSliceOperatorInfo;
 
 static void destroyTimeSliceOperatorInfo(void* param);
@@ -456,6 +458,99 @@ static int32_t initKeeperInfo(STimeSliceOperatorInfo* pInfo, SSDataBlock* pBlock
   return TSDB_CODE_SUCCESS;
 }
 
+static void doTimesliceImpl(SOperatorInfo* pOperator, STimeSliceOperatorInfo* pSliceInfo, SSDataBlock* pBlock,
+                            SExecTaskInfo* pTaskInfo) {
+  SSDataBlock* pResBlock = pSliceInfo->pRes;
+  SInterval*   pInterval = &pSliceInfo->interval;
+
+  SColumnInfoData* pTsCol = taosArrayGet(pBlock->pDataBlock, pSliceInfo->tsCol.slotId);
+  for (int32_t i = 0; i < pBlock->info.rows; ++i) {
+    int64_t ts = *(int64_t*)colDataGetData(pTsCol, i);
+
+    // check for duplicate timestamps
+    if (checkDuplicateTimestamps(pSliceInfo, pTsCol, i, pBlock->info.rows)) {
+      T_LONG_JMP(pTaskInfo->env, TSDB_CODE_FUNC_DUP_TIMESTAMP);
+    }
+
+    if (pSliceInfo->current > pSliceInfo->win.ekey) {
+      setOperatorCompleted(pOperator);
+      break;
+    }
+
+    if (ts == pSliceInfo->current) {
+      addCurrentRowToResult(pSliceInfo, &pOperator->exprSupp, pResBlock, pBlock, i);
+
+      doKeepPrevRows(pSliceInfo, pBlock, i);
+      doKeepLinearInfo(pSliceInfo, pBlock, i);
+
+      pSliceInfo->current =
+          taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
+      if (pSliceInfo->current > pSliceInfo->win.ekey) {
+        setOperatorCompleted(pOperator);
+        break;
+      }
+    } else if (ts < pSliceInfo->current) {
+      // in case of interpolation window starts and ends between two datapoints, fill(prev) need to interpolate
+      doKeepPrevRows(pSliceInfo, pBlock, i);
+      doKeepLinearInfo(pSliceInfo, pBlock, i);
+
+      if (i < pBlock->info.rows - 1) {
+        // in case of interpolation window starts and ends between two datapoints, fill(next) need to interpolate
+        doKeepNextRows(pSliceInfo, pBlock, i + 1);
+        int64_t nextTs = *(int64_t*)colDataGetData(pTsCol, i + 1);
+        if (nextTs > pSliceInfo->current) {
+          while (pSliceInfo->current < nextTs && pSliceInfo->current <= pSliceInfo->win.ekey) {
+            if (!genInterpolationResult(pSliceInfo, &pOperator->exprSupp, pResBlock, false) &&
+                pSliceInfo->fillType == TSDB_FILL_LINEAR) {
+              break;
+            } else {
+              pSliceInfo->current = taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit,
+                                                pInterval->precision);
+            }
+          }
+
+          if (pSliceInfo->current > pSliceInfo->win.ekey) {
+            setOperatorCompleted(pOperator);
+            break;
+          }
+        } else {
+          // ignore current row, and do nothing
+        }
+      } else {  // it is the last row of current block
+        doKeepPrevRows(pSliceInfo, pBlock, i);
+      }
+    } else {  // ts > pSliceInfo->current
+      // in case of interpolation window starts and ends between two datapoints, fill(next) need to interpolate
+      doKeepNextRows(pSliceInfo, pBlock, i);
+      doKeepLinearInfo(pSliceInfo, pBlock, i);
+
+      while (pSliceInfo->current < ts && pSliceInfo->current <= pSliceInfo->win.ekey) {
+        if (!genInterpolationResult(pSliceInfo, &pOperator->exprSupp, pResBlock, true) &&
+            pSliceInfo->fillType == TSDB_FILL_LINEAR) {
+          break;
+        } else {
+          pSliceInfo->current =
+              taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
+        }
+      }
+
+      // add current row if timestamp match
+      if (ts == pSliceInfo->current && pSliceInfo->current <= pSliceInfo->win.ekey) {
+        addCurrentRowToResult(pSliceInfo, &pOperator->exprSupp, pResBlock, pBlock, i);
+
+        pSliceInfo->current =
+            taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
+      }
+      doKeepPrevRows(pSliceInfo, pBlock, i);
+
+      if (pSliceInfo->current > pSliceInfo->win.ekey) {
+        setOperatorCompleted(pOperator);
+        break;
+      }
+    }
+  }
+}
+
 static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
   if (pOperator->status == OP_EXEC_DONE) {
     return NULL;
@@ -491,93 +586,7 @@ static SSDataBlock* doTimeslice(SOperatorInfo* pOperator) {
 
     // the pDataBlock are always the same one, no need to call this again
     setInputDataBlock(pSup, pBlock, order, MAIN_SCAN, true);
-
-    SColumnInfoData* pTsCol = taosArrayGet(pBlock->pDataBlock, pSliceInfo->tsCol.slotId);
-    for (int32_t i = 0; i < pBlock->info.rows; ++i) {
-      int64_t ts = *(int64_t*)colDataGetData(pTsCol, i);
-
-      // check for duplicate timestamps
-      if (checkDuplicateTimestamps(pSliceInfo, pTsCol, i, pBlock->info.rows)) {
-        T_LONG_JMP(pTaskInfo->env, TSDB_CODE_FUNC_DUP_TIMESTAMP);
-      }
-
-      if (pSliceInfo->current > pSliceInfo->win.ekey) {
-        setOperatorCompleted(pOperator);
-        break;
-      }
-
-      if (ts == pSliceInfo->current) {
-        addCurrentRowToResult(pSliceInfo, &pOperator->exprSupp, pResBlock, pBlock, i);
-
-        doKeepPrevRows(pSliceInfo, pBlock, i);
-        doKeepLinearInfo(pSliceInfo, pBlock, i);
-
-        pSliceInfo->current =
-            taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
-        if (pSliceInfo->current > pSliceInfo->win.ekey) {
-          setOperatorCompleted(pOperator);
-          break;
-        }
-      } else if (ts < pSliceInfo->current) {
-        // in case of interpolation window starts and ends between two datapoints, fill(prev) need to interpolate
-        doKeepPrevRows(pSliceInfo, pBlock, i);
-        doKeepLinearInfo(pSliceInfo, pBlock, i);
-
-        if (i < pBlock->info.rows - 1) {
-          // in case of interpolation window starts and ends between two datapoints, fill(next) need to interpolate
-          doKeepNextRows(pSliceInfo, pBlock, i + 1);
-          int64_t nextTs = *(int64_t*)colDataGetData(pTsCol, i + 1);
-          if (nextTs > pSliceInfo->current) {
-            while (pSliceInfo->current < nextTs && pSliceInfo->current <= pSliceInfo->win.ekey) {
-              if (!genInterpolationResult(pSliceInfo, &pOperator->exprSupp, pResBlock, false) &&
-                  pSliceInfo->fillType == TSDB_FILL_LINEAR) {
-                break;
-              } else {
-                pSliceInfo->current = taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit,
-                                                  pInterval->precision);
-              }
-            }
-
-            if (pSliceInfo->current > pSliceInfo->win.ekey) {
-              setOperatorCompleted(pOperator);
-              break;
-            }
-          } else {
-            // ignore current row, and do nothing
-          }
-        } else {  // it is the last row of current block
-          doKeepPrevRows(pSliceInfo, pBlock, i);
-        }
-      } else {  // ts > pSliceInfo->current
-        // in case of interpolation window starts and ends between two datapoints, fill(next) need to interpolate
-        doKeepNextRows(pSliceInfo, pBlock, i);
-        doKeepLinearInfo(pSliceInfo, pBlock, i);
-
-        while (pSliceInfo->current < ts && pSliceInfo->current <= pSliceInfo->win.ekey) {
-          if (!genInterpolationResult(pSliceInfo, &pOperator->exprSupp, pResBlock, true) &&
-              pSliceInfo->fillType == TSDB_FILL_LINEAR) {
-            break;
-          } else {
-            pSliceInfo->current =
-                taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
-          }
-        }
-
-        // add current row if timestamp match
-        if (ts == pSliceInfo->current && pSliceInfo->current <= pSliceInfo->win.ekey) {
-          addCurrentRowToResult(pSliceInfo, &pOperator->exprSupp, pResBlock, pBlock, i);
-
-          pSliceInfo->current =
-              taosTimeAdd(pSliceInfo->current, pInterval->interval, pInterval->intervalUnit, pInterval->precision);
-        }
-        doKeepPrevRows(pSliceInfo, pBlock, i);
-
-        if (pSliceInfo->current > pSliceInfo->win.ekey) {
-          setOperatorCompleted(pOperator);
-          break;
-        }
-      }
-    }
+    doTimesliceImpl(pOperator, pSliceInfo, pBlock, pTaskInfo);
   }
 
   // check if need to interpolate after last datablock
@@ -643,6 +652,8 @@ SOperatorInfo* createTimeSliceOperatorInfo(SOperatorInfo* downstream, SPhysiNode
   pInfo->current = pInfo->win.skey;
   pInfo->prevTsSet = false;
   pInfo->prevTs = 0;
+  pInfo->groupId = 0;
+  pInfo->pNextGroupRes = NULL;
 
   if (downstream->operatorType == QUERY_NODE_PHYSICAL_PLAN_TABLE_SCAN) {
     STableScanInfo* pScanInfo = (STableScanInfo*)downstream->info;