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#5011

Committed 03 Apr 2026 03:59PM UTC coverage: 72.3% (+0.008%) from 72.292%

Build # #5011

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merge: from main to 3.0 branch #35067

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76.84

/source/libs/executor/src/timewindowoperator.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#include "executorInt.h"
#include "filter.h"
#include "function.h"
#include "functionMgt.h"
#include "operator.h"
#include "query.h"
#include "querytask.h"
#include "taoserror.h"
#include "tchecksum.h"
#include "tcommon.h"
#include "tcompare.h"
#include "tdatablock.h"
#include "tfill.h"
#include "tglobal.h"
#include "tlog.h"
#include "ttime.h"

typedef enum SResultTsInterpType {
  RESULT_ROW_START_INTERP = 1,
  RESULT_ROW_END_INTERP = 2,
} SResultTsInterpType;

typedef struct SOpenWindowInfo {
  SResultRowPosition pos;
  uint64_t           groupId;
} SOpenWindowInfo;

static int64_t* extractTsCol(SSDataBlock* pBlock, const SIntervalAggOperatorInfo* pInfo, SExecTaskInfo* pTaskInfo);

static SResultRowPosition addToOpenWindowList(SResultRowInfo* pResultRowInfo, const SResultRow* pResult,
                                              uint64_t groupId, SExecTaskInfo* pTaskInfo);
static void doCloseWindow(SResultRowInfo* pResultRowInfo, const SIntervalAggOperatorInfo* pInfo, SResultRow* pResult);

static int32_t setTimeWindowOutputBuf(SResultRowInfo* pResultRowInfo, STimeWindow* win, bool masterscan,
                                      SResultRow** pResult, int64_t tableGroupId, SqlFunctionCtx* pCtx,
                                      int32_t numOfOutput, int32_t* rowEntryInfoOffset, SAggSupporter* pAggSup,
                                      SExecTaskInfo* pTaskInfo) {
  SResultRow* pResultRow = doSetResultOutBufByKey(pAggSup->pResultBuf, pResultRowInfo, (char*)&win->skey, TSDB_KEYSIZE,
                                                  masterscan, tableGroupId, pTaskInfo, true, pAggSup, true);

  if (pResultRow == NULL || pTaskInfo->code != 0) {
    *pResult = NULL;
    qError("failed to set result output buffer, error:%s", tstrerror(pTaskInfo->code));
    return pTaskInfo->code;
  }

  // set time window for current result
  TAOS_SET_POBJ_ALIGNED(&pResultRow->win, win);
  *pResult = pResultRow;
  return setResultRowInitCtx(pResultRow, pCtx, numOfOutput, rowEntryInfoOffset);
}

void doKeepTuple(SWindowRowsSup* pRowSup, int64_t ts, int32_t rowIndex, uint64_t groupId) {
  pRowSup->win.ekey = ts;
  pRowSup->prevTs = ts;
  pRowSup->groupId = groupId;
  pRowSup->numOfRows += 1;
  if (hasContinuousNullRows(pRowSup)) {
    // rows having null state col are wrapped by rows of same state
    // these rows can be counted into current window
    pRowSup->numOfRows += pRowSup->numNullRows;
    resetNumNullRows(pRowSup);
  }
}

void doKeepNewWindowStartInfo(SWindowRowsSup* pRowSup, const int64_t* tsList, int32_t rowIndex, uint64_t groupId) {
  pRowSup->startRowIndex = rowIndex;
  pRowSup->numOfRows = 0;
  pRowSup->win.skey = tsList[rowIndex];
  pRowSup->groupId = groupId;
  resetNumNullRows(pRowSup);
}

FORCE_INLINE int32_t getForwardStepsInBlock(int32_t numOfRows, __block_search_fn_t searchFn, TSKEY ekey, int32_t pos,
                                            int32_t order, int64_t* pData) {
  int32_t forwardRows = 0;

  if (order == TSDB_ORDER_ASC) {
    int32_t end = searchFn((char*)&pData[pos], numOfRows - pos, ekey, order);
    if (end >= 0) {
      forwardRows = end;

      while (pData[end + pos] == ekey) {
        forwardRows += 1;
        ++pos;
      }
    }
  } else {
    int32_t end = searchFn((char*)&pData[pos], numOfRows - pos, ekey, order);
    if (end >= 0) {
      forwardRows = end;

      while (pData[end + pos] == ekey) {
        forwardRows += 1;
        ++pos;
      }
    }
    //    int32_t end = searchFn((char*)pData, pos + 1, ekey, order);
    //    if (end >= 0) {
    //      forwardRows = pos - end;
    //
    //      if (pData[end] == ekey) {
    //        forwardRows += 1;
    //      }
    //    }
  }

  return forwardRows;
}

int32_t binarySearchForKey(char* pValue, int num, TSKEY key, int order) {
  int32_t midPos = -1;
  int32_t numOfRows;

  if (num <= 0) {
    return -1;
  }

  TSKEY*  keyList = (TSKEY*)pValue;
  int32_t firstPos = 0;
  int32_t lastPos = num - 1;

  if (order == TSDB_ORDER_DESC) {
    // find the first position which is smaller than the key
    while (1) {
      if (key >= keyList[firstPos]) return firstPos;
      if (key == keyList[lastPos]) return lastPos;

      if (key < keyList[lastPos]) {
        lastPos += 1;
        if (lastPos >= num) {
          return -1;
        } else {
          return lastPos;
        }
      }

      numOfRows = lastPos - firstPos + 1;
      midPos = (numOfRows >> 1) + firstPos;

      if (key < keyList[midPos]) {
        firstPos = midPos + 1;
      } else if (key > keyList[midPos]) {
        lastPos = midPos - 1;
      } else {
        break;
      }
    }

  } else {
    // find the first position which is bigger than the key
    while (1) {
      if (key <= keyList[firstPos]) return firstPos;
      if (key == keyList[lastPos]) return lastPos;

      if (key > keyList[lastPos]) {
        lastPos = lastPos + 1;
        if (lastPos >= num)
          return -1;
        else
          return lastPos;
      }

      numOfRows = lastPos - firstPos + 1;
      midPos = (numOfRows >> 1u) + firstPos;

      if (key < keyList[midPos]) {
        lastPos = midPos - 1;
      } else if (key > keyList[midPos]) {
        firstPos = midPos + 1;
      } else {
        break;
      }
    }
  }

  return midPos;
}

int32_t getNumOfRowsInTimeWindow(SDataBlockInfo* pDataBlockInfo, TSKEY* pPrimaryColumn, int32_t startPos, TSKEY ekey,
                                 __block_search_fn_t searchFn, STableQueryInfo* item, int32_t order) {
  int32_t num = -1;
  int32_t step = GET_FORWARD_DIRECTION_FACTOR(order);

  if (order == TSDB_ORDER_ASC) {
    if (ekey < pDataBlockInfo->window.ekey && pPrimaryColumn) {
      num = getForwardStepsInBlock(pDataBlockInfo->rows, searchFn, ekey, startPos, order, pPrimaryColumn);
      if (item != NULL) {
        item->lastKey = pPrimaryColumn[startPos + (num - 1)] + step;
      }
    } else {
      num = pDataBlockInfo->rows - startPos;
      if (item != NULL) {
        item->lastKey = pDataBlockInfo->window.ekey + step;
      }
    }
  } else {  // desc
    if (ekey > pDataBlockInfo->window.skey && pPrimaryColumn) {
      num = getForwardStepsInBlock(pDataBlockInfo->rows, searchFn, ekey, startPos, order, pPrimaryColumn);
      if (item != NULL) {
        item->lastKey = pPrimaryColumn[startPos + (num - 1)] + step;
      }
    } else {
      num = pDataBlockInfo->rows - startPos;
      if (item != NULL) {
        item->lastKey = pDataBlockInfo->window.ekey + step;
      }
    }
  }

  return num;
}

void doTimeWindowInterpolation(SArray* pPrevValues, SArray* pDataBlock, TSKEY prevTs, int32_t prevRowIndex, TSKEY curTs,
                               int32_t curRowIndex, TSKEY windowKey, int32_t type, SExprSupp* pSup) {
  SqlFunctionCtx* pCtx = pSup->pCtx;

  int32_t index = 1;
  for (int32_t k = 0; k < pSup->numOfExprs; ++k) {
    if (!fmIsIntervalInterpoFunc(pCtx[k].functionId)) {
      pCtx[k].start.key = INT64_MIN;
      continue;
    }

    SFunctParam*     pParam = &pCtx[k].param[0];
    SColumnInfoData* pColInfo = taosArrayGet(pDataBlock, pParam->pCol->slotId);

    double v1 = 0, v2 = 0, v = 0;
    if (prevRowIndex == -1) {
      SGroupKeys* p = taosArrayGet(pPrevValues, index);
      GET_TYPED_DATA(v1, double, pColInfo->info.type, p->pData, typeGetTypeModFromColInfo(&pColInfo->info));
    } else {
      GET_TYPED_DATA(v1, double, pColInfo->info.type, colDataGetData(pColInfo, prevRowIndex),
                     typeGetTypeModFromColInfo(&pColInfo->info));
    }

    GET_TYPED_DATA(v2, double, pColInfo->info.type, colDataGetData(pColInfo, curRowIndex),
                   typeGetTypeModFromColInfo(&pColInfo->info));

#if 0
    if (functionId == FUNCTION_INTERP) {
      if (type == RESULT_ROW_START_INTERP) {
        pCtx[k].start.key = prevTs;
        pCtx[k].start.val = v1;

        pCtx[k].end.key = curTs;
        pCtx[k].end.val = v2;

        if (pColInfo->info.type == TSDB_DATA_TYPE_BINARY || pColInfo->info.type == TSDB_DATA_TYPE_VARBINARY || pColInfo->info.type == TSDB_DATA_TYPE_NCHAR ||
            pColInfo->info.type == TSDB_DATA_TYPE_GEOMETRY) {
          if (prevRowIndex == -1) {
            //            pCtx[k].start.ptr = (char*)pRuntimeEnv->prevRow[index];
          } else {
            pCtx[k].start.ptr = (char*)pColInfo->pData + prevRowIndex * pColInfo->info.bytes;
          }

          pCtx[k].end.ptr = (char*)pColInfo->pData + curRowIndex * pColInfo->info.bytes;
        }
      }
    } else if (functionId == FUNCTION_TWA) {
#endif

    SPoint point1 = (SPoint){.key = prevTs, .val = &v1};
    SPoint point2 = (SPoint){.key = curTs, .val = &v2};
    SPoint point = (SPoint){.key = windowKey, .val = &v};

    if (!fmIsElapsedFunc(pCtx[k].functionId)) {
      taosGetLinearInterpolationVal(&point, TSDB_DATA_TYPE_DOUBLE, &point1, &point2, TSDB_DATA_TYPE_DOUBLE, 0);
    }

    if (type == RESULT_ROW_START_INTERP) {
      pCtx[k].start.key = point.key;
      pCtx[k].start.val = v;
    } else {
      pCtx[k].end.key = point.key;
      pCtx[k].end.val = v;
    }

    index += 1;
  }
#if 0
  }
#endif
}

static void setNotInterpoWindowKey(SqlFunctionCtx* pCtx, int32_t numOfOutput, int32_t type) {
  if (type == RESULT_ROW_START_INTERP) {
    for (int32_t k = 0; k < numOfOutput; ++k) {
      pCtx[k].start.key = INT64_MIN;
    }
  } else {
    for (int32_t k = 0; k < numOfOutput; ++k) {
      pCtx[k].end.key = INT64_MIN;
    }
  }
}

static bool setTimeWindowInterpolationStartTs(SIntervalAggOperatorInfo* pInfo, int32_t pos, SSDataBlock* pBlock,
                                              const TSKEY* tsCols, STimeWindow* win, SExprSupp* pSup) {
  bool ascQuery = (pInfo->binfo.inputTsOrder == TSDB_ORDER_ASC);

  TSKEY curTs = tsCols[pos];

  SGroupKeys* pTsKey = taosArrayGet(pInfo->pPrevValues, 0);
  TSKEY       lastTs = *(int64_t*)pTsKey->pData;

  // lastTs == INT64_MIN and pos == 0 means this is the first time window, interpolation is not needed.
  // start exactly from this point, no need to do interpolation
  TSKEY key = ascQuery ? win->skey : win->ekey;
  if (key == curTs) {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_START_INTERP);
    return true;
  }

  // it is the first time window, no need to do interpolation
  if (pTsKey->isNull && pos == 0) {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_START_INTERP);
  } else {
    TSKEY prevTs = ((pos == 0) ? lastTs : tsCols[pos - 1]);
    doTimeWindowInterpolation(pInfo->pPrevValues, pBlock->pDataBlock, prevTs, pos - 1, curTs, pos, key,
                              RESULT_ROW_START_INTERP, pSup);
  }

  return true;
}

static int32_t setTimeWindowInterpolationEndTs(SIntervalAggOperatorInfo* pInfo, SExprSupp* pSup, int32_t endRowIndex,
                                               int32_t nextRowIndex, SArray* pDataBlock, const TSKEY* tsCols,
                                               TSKEY blockEkey, STimeWindow* win, bool* pRes) {
  int32_t code = TSDB_CODE_SUCCESS;
  int32_t lino = 0;
  int32_t order = pInfo->binfo.inputTsOrder;

  TSKEY actualEndKey = tsCols[endRowIndex];
  TSKEY key = (order == TSDB_ORDER_ASC) ? win->ekey : win->skey;

  // not ended in current data block, do not invoke interpolation
  if ((key > blockEkey && (order == TSDB_ORDER_ASC)) || (key < blockEkey && (order == TSDB_ORDER_DESC))) {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_END_INTERP);
    (*pRes) = false;
    return code;
  }

  // there is actual end point of current time window, no interpolation needs
  if (key == actualEndKey) {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_END_INTERP);
    (*pRes) = true;
    return code;
  }

  if (nextRowIndex < 0) {
    qError("%s failed at line %d since %s", __func__, __LINE__, tstrerror(TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR));
    return TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
  }

  TSKEY nextKey = tsCols[nextRowIndex];
  doTimeWindowInterpolation(pInfo->pPrevValues, pDataBlock, actualEndKey, endRowIndex, nextKey, nextRowIndex, key,
                            RESULT_ROW_END_INTERP, pSup);
  (*pRes) = true;
  return code;
}

bool inCalSlidingWindow(const SInterval* pInterval, const STimeWindow* pWin, TSKEY calStart, TSKEY calEnd) {
  if (pInterval->interval != pInterval->sliding && (pWin->ekey < calStart || pWin->skey > calEnd)) {
    return false;
  }

  return true;
}

bool inSlidingWindow(const SInterval* pInterval, const STimeWindow* pWin, const SDataBlockInfo* pBlockInfo) {
  return inCalSlidingWindow(pInterval, pWin, pBlockInfo->calWin.skey, pBlockInfo->calWin.ekey);
}

int32_t getNextQualifiedWindow(SInterval* pInterval, STimeWindow* pNext, SDataBlockInfo* pDataBlockInfo,
                               TSKEY* primaryKeys, int32_t prevPosition, int32_t order) {
  bool ascQuery = (order != TSDB_ORDER_DESC);

  int32_t precision = pInterval->precision;
  getNextTimeWindow(pInterval, pNext, order);

  // next time window is not in current block
  if ((pNext->skey > pDataBlockInfo->window.ekey && order == TSDB_ORDER_ASC) ||
      (pNext->ekey < pDataBlockInfo->window.skey && order == TSDB_ORDER_DESC)) {
    return -1;
  }

  if (!inSlidingWindow(pInterval, pNext, pDataBlockInfo) && order == TSDB_ORDER_ASC) {
    return -1;
  }

  TSKEY   skey = ascQuery ? pNext->skey : pNext->ekey;
  int32_t startPos = 0;

  // tumbling time window query, a special case of sliding time window query
  if (pInterval->sliding == pInterval->interval && prevPosition != -1) {
    startPos = prevPosition + 1;
  } else {
    if ((skey <= pDataBlockInfo->window.skey && ascQuery) || (skey >= pDataBlockInfo->window.ekey && !ascQuery)) {
      startPos = 0;
    } else {
      startPos = binarySearchForKey((char*)primaryKeys, pDataBlockInfo->rows, skey, order);
    }
  }
  if(startPos < 0 || startPos >= pDataBlockInfo->rows) {
    return -1;
  }

  /* interp query with fill should not skip time window */
  //  if (pQueryAttr->pointInterpQuery && pQueryAttr->fillType != TSDB_FILL_NONE) {
  //    return startPos;
  //  }

  /*
   * This time window does not cover any data, try next time window,
   * this case may happen when the time window is too small
   */
  if (primaryKeys != NULL) {
    if (ascQuery && primaryKeys[startPos] > pNext->ekey) {
      TSKEY next = primaryKeys[startPos];
      if (pInterval->intervalUnit == 'n' || pInterval->intervalUnit == 'y') {
        pNext->skey = taosTimeTruncate(next, pInterval);
        pNext->ekey = taosTimeGetIntervalEnd(pNext->skey, pInterval);
      } else {
        pNext->ekey += ((next - pNext->ekey + pInterval->sliding - 1) / pInterval->sliding) * pInterval->sliding;
        pNext->skey = pNext->ekey - pInterval->interval + 1;
      }
    } else if ((!ascQuery) && primaryKeys[startPos] < pNext->skey) {
      TSKEY next = primaryKeys[startPos];
      if (pInterval->intervalUnit == 'n' || pInterval->intervalUnit == 'y') {
        pNext->skey = taosTimeTruncate(next, pInterval);
        pNext->ekey = taosTimeGetIntervalEnd(pNext->skey, pInterval);
      } else {
        pNext->skey -= ((pNext->skey - next + pInterval->sliding - 1) / pInterval->sliding) * pInterval->sliding;
        pNext->ekey = pNext->skey + pInterval->interval - 1;
      }
    }
  }

  return startPos;
}

static bool isResultRowInterpolated(SResultRow* pResult, SResultTsInterpType type) {
  if (type == RESULT_ROW_START_INTERP) {
    return pResult->startInterp == true;
  } else {
    return pResult->endInterp == true;
  }
}

static void setResultRowInterpo(SResultRow* pResult, SResultTsInterpType type) {
  if (type == RESULT_ROW_START_INTERP) {
    pResult->startInterp = true;
  } else {
    pResult->endInterp = true;
  }
}

static int32_t doWindowBorderInterpolation(SIntervalAggOperatorInfo* pInfo, SSDataBlock* pBlock, SResultRow* pResult,
                                           STimeWindow* win, int32_t startPos, int32_t forwardRows, SExprSupp* pSup) {
  int32_t code = TSDB_CODE_SUCCESS;
  int32_t lino = 0;
  if (!pInfo->timeWindowInterpo) {
    return code;
  }

  if (pBlock == NULL) {
    code = TSDB_CODE_INVALID_PARA;
    return code;
  }

  if (pBlock->pDataBlock == NULL) {
    return code;
  }

  SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, pInfo->primaryTsIndex);

  TSKEY* tsCols = (TSKEY*)(pColInfo->pData);
  bool   done = isResultRowInterpolated(pResult, RESULT_ROW_START_INTERP);
  if (!done) {  // it is not interpolated, now start to generated the interpolated value
    bool interp = setTimeWindowInterpolationStartTs(pInfo, startPos, pBlock, tsCols, win, pSup);
    if (interp) {
      setResultRowInterpo(pResult, RESULT_ROW_START_INTERP);
    }
  } else {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_START_INTERP);
  }

  // point interpolation does not require the end key time window interpolation.
  // interpolation query does not generate the time window end interpolation
  done = isResultRowInterpolated(pResult, RESULT_ROW_END_INTERP);
  if (!done) {
    int32_t endRowIndex = startPos + forwardRows - 1;
    int32_t nextRowIndex = endRowIndex + 1;

    // duplicated ts row does not involve in the interpolation of end value for current time window
    int32_t x = endRowIndex;
    while (x > 0) {
      if (tsCols[x] == tsCols[x - 1]) {
        x -= 1;
      } else {
        endRowIndex = x;
        break;
      }
    }

    TSKEY endKey = (pInfo->binfo.inputTsOrder == TSDB_ORDER_ASC) ? pBlock->info.window.ekey : pBlock->info.window.skey;
    bool  interp = false;
    code = setTimeWindowInterpolationEndTs(pInfo, pSup, endRowIndex, nextRowIndex, pBlock->pDataBlock, tsCols, endKey,
                                           win, &interp);
    QUERY_CHECK_CODE(code, lino, _end);
    if (interp) {
      setResultRowInterpo(pResult, RESULT_ROW_END_INTERP);
    }
  } else {
    setNotInterpoWindowKey(pSup->pCtx, pSup->numOfExprs, RESULT_ROW_END_INTERP);
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
  }
  return code;
}

static void saveDataBlockLastRow(SArray* pPrevKeys, const SSDataBlock* pBlock, SArray* pCols) {
  if (pBlock->pDataBlock == NULL) {
    return;
  }

  size_t num = taosArrayGetSize(pPrevKeys);
  for (int32_t k = 0; k < num; ++k) {
    SColumn* pc = taosArrayGet(pCols, k);

    SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, pc->slotId);

    SGroupKeys* pkey = taosArrayGet(pPrevKeys, k);
    for (int32_t i = pBlock->info.rows - 1; i >= 0; --i) {
      if (colDataIsNull_s(pColInfo, i)) {
        continue;
      }

      char* val = colDataGetData(pColInfo, i);
      if (IS_VAR_DATA_TYPE(pkey->type)) {
        if (IS_STR_DATA_BLOB(pkey->type)) {
          memcpy(pkey->pData, val, blobDataTLen(val));
        } else {
          memcpy(pkey->pData, val, varDataTLen(val));
        }
      } else {
        memcpy(pkey->pData, val, pkey->bytes);
      }

      break;
    }
  }
}

static void doInterpUnclosedTimeWindow(SOperatorInfo* pOperatorInfo, int32_t numOfExprs, SResultRowInfo* pResultRowInfo,
                                       SSDataBlock* pBlock, int32_t scanFlag, int64_t* tsCols, SResultRowPosition* p) {
  SExecTaskInfo* pTaskInfo = pOperatorInfo->pTaskInfo;

  SIntervalAggOperatorInfo* pInfo = (SIntervalAggOperatorInfo*)pOperatorInfo->info;
  SExprSupp*                pSup = &pOperatorInfo->exprSupp;

  int32_t startPos = 0;
  int32_t numOfOutput = pSup->numOfExprs;

  SResultRow* pResult = NULL;

  while (1) {
    SListNode*          pn = tdListGetHead(pResultRowInfo->openWindow);
    SOpenWindowInfo*    pOpenWin = (SOpenWindowInfo*)pn->data;
    uint64_t            groupId = pOpenWin->groupId;
    SResultRowPosition* p1 = &pOpenWin->pos;
    if (p->pageId == p1->pageId && p->offset == p1->offset) {
      break;
    }

    SResultRow* pr = getResultRowByPos(pInfo->aggSup.pResultBuf, p1, false);
    if (NULL == pr) {
      T_LONG_JMP(pTaskInfo->env, terrno);
    }

    if (!(pr->offset == p1->offset && pr->pageId == p1->pageId)) {
      pTaskInfo->code = TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
      T_LONG_JMP(pTaskInfo->env, terrno);
    }

    if (pr->closed) {
      if (!(isResultRowInterpolated(pr, RESULT_ROW_START_INTERP) &&
            isResultRowInterpolated(pr, RESULT_ROW_END_INTERP))) {
        pTaskInfo->code = TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
        T_LONG_JMP(pTaskInfo->env, terrno);
      }
      SListNode* pNode = tdListPopHead(pResultRowInfo->openWindow);
      taosMemoryFree(pNode);
      continue;
    }

    STimeWindow w = pr->win;
    int32_t     ret = setTimeWindowOutputBuf(pResultRowInfo, &w, (scanFlag == MAIN_SCAN), &pResult, groupId, pSup->pCtx,
                                             numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    if (isResultRowInterpolated(pResult, RESULT_ROW_END_INTERP)) {
      pTaskInfo->code = TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
      T_LONG_JMP(pTaskInfo->env, terrno);
    }

    SGroupKeys* pTsKey = taosArrayGet(pInfo->pPrevValues, 0);
    if (!pTsKey) {
      pTaskInfo->code = terrno;
      T_LONG_JMP(pTaskInfo->env, terrno);
    }

    int64_t prevTs = *(int64_t*)pTsKey->pData;
    if (groupId == pBlock->info.id.groupId) {
      TSKEY curTs = pBlock->info.window.skey;
      if (tsCols != NULL) {
        curTs = tsCols[startPos];
      }
      doTimeWindowInterpolation(pInfo->pPrevValues, pBlock->pDataBlock, prevTs, -1, curTs, startPos, w.ekey,
                                RESULT_ROW_END_INTERP, pSup);
    }

    setResultRowInterpo(pResult, RESULT_ROW_END_INTERP);
    setNotInterpoWindowKey(pSup->pCtx, numOfExprs, RESULT_ROW_START_INTERP);

    updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &w, 1);
    ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &pInfo->twAggSup.timeWindowData, startPos, 0,
                                          pBlock->info.rows, numOfExprs);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    if (isResultRowInterpolated(pResult, RESULT_ROW_END_INTERP)) {
      closeResultRow(pr);
      SListNode* pNode = tdListPopHead(pResultRowInfo->openWindow);
      taosMemoryFree(pNode);
    } else {  // the remains are can not be closed yet.
      break;
    }
  }
}

static bool tsKeyCompFn(void* l, void* r, void* param) {
  TSKEY*                    lTS = (TSKEY*)l;
  TSKEY*                    rTS = (TSKEY*)r;
  SIntervalAggOperatorInfo* pInfo = param;
  return pInfo->binfo.outputTsOrder == ORDER_ASC ? *lTS < *rTS : *lTS > *rTS;
}

static bool isCalculatedWin(SIntervalAggOperatorInfo* pInfo, const STimeWindow* win, uint64_t tableGroupId) {
  char keyBuf[sizeof(TSKEY) + sizeof(uint64_t)] = {0};
  SET_RES_WINDOW_KEY(keyBuf, (char*)&win->skey, sizeof(TSKEY), tableGroupId);
  return tSimpleHashGet(pInfo->aggSup.pResultRowHashTable, keyBuf, GET_RES_WINDOW_KEY_LEN(sizeof(TSKEY))) != NULL;
}

/**
 * @brief check if cur window should be filtered out by limit info
 * @retval true if should be filtered out
 * @retval false if not filtering out
 * @note If no limit info, we skip filtering.
 *       If input/output ts order mismatch, we skip filtering too.
 *       eg. input ts order: desc, and output ts order: asc, limit: 10
 *       IntervalOperator should output the first 10 windows, however, we can't find the first 10 windows until we scan
 *       every tuple in every block.
 *       And the boundedQueue keeps refreshing all records with smaller ts key.
 */
static bool filterWindowWithLimit(SIntervalAggOperatorInfo* pOperatorInfo, STimeWindow* win, uint64_t groupId,
                                  SExecTaskInfo* pTaskInfo) {
  int32_t code = TSDB_CODE_SUCCESS;
  int32_t lino = 0;
  if (!pOperatorInfo->limited  // if no limit info, no filter will be applied
      || pOperatorInfo->binfo.inputTsOrder != pOperatorInfo->binfo.outputTsOrder
      // if input/output ts order mismatch, no filter
  ) {
    return false;
  }

  if (pOperatorInfo->limit == 0) return true;

  if (pOperatorInfo->pBQ == NULL) {
    pOperatorInfo->pBQ = createBoundedQueue(pOperatorInfo->limit - 1, tsKeyCompFn, taosAutoMemoryFree, pOperatorInfo);
    QUERY_CHECK_NULL(pOperatorInfo->pBQ, code, lino, _end, terrno);
  }

  bool shouldFilter = false;
  // if BQ has been full, compare it with top of BQ
  if (taosBQSize(pOperatorInfo->pBQ) == taosBQMaxSize(pOperatorInfo->pBQ) + 1) {
    PriorityQueueNode* top = taosBQTop(pOperatorInfo->pBQ);
    shouldFilter = tsKeyCompFn(top->data, &win->skey, pOperatorInfo);
  }
  if (shouldFilter) {
    return true;
  } else if (isCalculatedWin(pOperatorInfo, win, groupId)) {
    return false;
  }

  // cur win not been filtered out and not been pushed into BQ yet, push it into BQ
  PriorityQueueNode node = {.data = taosMemoryMalloc(sizeof(TSKEY))};
  QUERY_CHECK_NULL(node.data, code, lino, _end, terrno);

  *((TSKEY*)node.data) = win->skey;

  if (NULL == taosBQPush(pOperatorInfo->pBQ, &node)) {
    taosMemoryFree(node.data);
    return true;
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  return false;
}

int32_t getNumOfRowsInTimeWinUnsorted(SDataBlockInfo* pDataBlockInfo, TSKEY* pPrimaryColumn, STimeWindow* win,
                                      int32_t startPos) {
  int32_t rows = pDataBlockInfo->rows;
  for (int32_t i = startPos; i < pDataBlockInfo->rows; ++i) {
    if (pPrimaryColumn[i] >= win->skey && pPrimaryColumn[i] <= win->ekey) {
      continue;
    } else {
      return i - startPos;
    }
  }
  return rows - startPos;
}

static bool hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResultRowInfo, SSDataBlock* pBlock,
                            int32_t scanFlag) {
  SIntervalAggOperatorInfo* pInfo = (SIntervalAggOperatorInfo*)pOperatorInfo->info;

  SExecTaskInfo* pTaskInfo = pOperatorInfo->pTaskInfo;
  SExprSupp*     pSup = &pOperatorInfo->exprSupp;

  int32_t     startPos = 0;
  int32_t     numOfOutput = pSup->numOfExprs;
  int64_t*    tsCols = extractTsCol(pBlock, pInfo, pTaskInfo);
  uint64_t    tableGroupId = pBlock->info.id.groupId;
  bool        ascScan = (pInfo->binfo.inputTsOrder == TSDB_ORDER_ASC);
  SResultRow* pResult = NULL;
  bool        sorted = pInfo->binfo.inputTsOrder == ORDER_ASC || pInfo->binfo.inputTsOrder == ORDER_DESC || tsCols == NULL;
  TSKEY       ts = sorted ? getStartTsKey(&pBlock->info.window, tsCols) : tsCols[startPos];

  if (tableGroupId != pInfo->curGroupId) {
    pInfo->handledGroupNum += 1;
    if (pInfo->slimited && pInfo->handledGroupNum > pInfo->slimit) {
      return true;
    } else {
      pInfo->curGroupId = tableGroupId;
      destroyBoundedQueue(pInfo->pBQ);
      pInfo->pBQ = NULL;
    }
  }

  STimeWindow win =
      getActiveTimeWindow(pInfo->aggSup.pResultBuf, pResultRowInfo, ts, &pInfo->interval, pInfo->binfo.inputTsOrder);
  if (filterWindowWithLimit(pInfo, &win, tableGroupId, pTaskInfo)) return false;

  int32_t ret = setTimeWindowOutputBuf(pResultRowInfo, &win, (scanFlag == MAIN_SCAN), &pResult, tableGroupId,
                                       pSup->pCtx, numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
  if (ret != TSDB_CODE_SUCCESS || pResult == NULL) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }

  TSKEY   ekey = ascScan ? win.ekey : win.skey;
  int32_t forwardRows = sorted ? getNumOfRowsInTimeWindow(&pBlock->info, tsCols, startPos, ekey, binarySearchForKey,
                                                          NULL, pInfo->binfo.inputTsOrder)
                               : getNumOfRowsInTimeWinUnsorted(&pBlock->info, tsCols, &win, startPos);

  // prev time window not interpolation yet.
  if (pInfo->timeWindowInterpo) {
    SResultRowPosition pos = addToOpenWindowList(pResultRowInfo, pResult, tableGroupId, pTaskInfo);
    doInterpUnclosedTimeWindow(pOperatorInfo, numOfOutput, pResultRowInfo, pBlock, scanFlag, tsCols, &pos);

    // restore current time window
    ret = setTimeWindowOutputBuf(pResultRowInfo, &win, (scanFlag == MAIN_SCAN), &pResult, tableGroupId, pSup->pCtx,
                                 numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    // window start key interpolation
    ret = doWindowBorderInterpolation(pInfo, pBlock, pResult, &win, startPos, forwardRows, pSup);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }
  }
  // qDebug("hashIntervalAgg1 window skey: %lld, ekey:%lld, startPos: %d, forwardRows: %d",
  //   win.skey, win.ekey, startPos, forwardRows);
  updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &win, 1);
  ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &pInfo->twAggSup.timeWindowData, startPos, forwardRows,
                                        pBlock->info.rows, numOfOutput);
  if (ret != TSDB_CODE_SUCCESS) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }

  doCloseWindow(pResultRowInfo, pInfo, pResult);

  STimeWindow nextWin = win;
  int32_t rows = pBlock->info.rows;

  while (startPos < pBlock->info.rows) {
    if (sorted) {
      startPos = getNextQualifiedWindow(&pInfo->interval, &nextWin, &pBlock->info, tsCols, forwardRows - 1 + startPos,
                                        pInfo->binfo.inputTsOrder);
      if (startPos < 0) {
        break;
      }
    } else {
      pBlock->info.rows = forwardRows;
      int32_t newStartOff = forwardRows >= 1
                                ? getNextQualifiedWindow(&pInfo->interval, &nextWin, &pBlock->info, tsCols + startPos,
                                                         forwardRows - 1, pInfo->binfo.inputTsOrder)
                                : -1;
      pBlock->info.rows = rows;
      if (newStartOff >= 0) {
        startPos += newStartOff;
      } else if ((startPos += forwardRows) < pBlock->info.rows) {
        getInitialStartTimeWindow(&pInfo->interval, tsCols[startPos], &nextWin, true);
      }
      if (startPos >= pBlock->info.rows) {
        break;
      }
    }

    if (filterWindowWithLimit(pInfo, &nextWin, tableGroupId, pTaskInfo)) {
      break;
    }

    ekey = ascScan ? nextWin.ekey : nextWin.skey;
    forwardRows = sorted ? getNumOfRowsInTimeWindow(&pBlock->info, tsCols, startPos, ekey, binarySearchForKey, NULL,
                                                    pInfo->binfo.inputTsOrder)
                         : getNumOfRowsInTimeWinUnsorted(&pBlock->info, tsCols, &nextWin, startPos);
    if (forwardRows == 0) continue;

    // null data, failed to allocate more memory buffer
    int32_t code = setTimeWindowOutputBuf(pResultRowInfo, &nextWin, (scanFlag == MAIN_SCAN), &pResult, tableGroupId,
                                          pSup->pCtx, numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
    if (code != TSDB_CODE_SUCCESS || pResult == NULL) {
      T_LONG_JMP(pTaskInfo->env, code);
    }

    // window start(end) key interpolation
    code = doWindowBorderInterpolation(pInfo, pBlock, pResult, &nextWin, startPos, forwardRows, pSup);
    if (code != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, code);
    }
    // TODO: add to open window? how to close the open windows after input blocks exhausted?
#if 0
    if ((ascScan && ekey <= pBlock->info.window.ekey) ||
        (!ascScan && ekey >= pBlock->info.window.skey)) {
      // window start(end) key interpolation
      doWindowBorderInterpolation(pInfo, pBlock, pResult, &nextWin, startPos, forwardRows, pSup);
    } else if (pInfo->timeWindowInterpo) {
      addToOpenWindowList(pResultRowInfo, pResult, tableGroupId);
    }
#endif
    updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &nextWin, 1);
    ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &pInfo->twAggSup.timeWindowData, startPos, forwardRows,
                                          pBlock->info.rows, numOfOutput);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }
    doCloseWindow(pResultRowInfo, pInfo, pResult);
  }

  if (pInfo->timeWindowInterpo) {
    saveDataBlockLastRow(pInfo->pPrevValues, pBlock, pInfo->pInterpCols);
  }
  return false;
}

void doCloseWindow(SResultRowInfo* pResultRowInfo, const SIntervalAggOperatorInfo* pInfo, SResultRow* pResult) {
  // current result is done in computing final results.
  if (pInfo->timeWindowInterpo && isResultRowInterpolated(pResult, RESULT_ROW_END_INTERP)) {
    closeResultRow(pResult);
    SListNode* pNode = tdListPopHead(pResultRowInfo->openWindow);
    taosMemoryFree(pNode);
  }
}

SResultRowPosition addToOpenWindowList(SResultRowInfo* pResultRowInfo, const SResultRow* pResult, uint64_t groupId,
                                       SExecTaskInfo* pTaskInfo) {
  int32_t         code = TSDB_CODE_SUCCESS;
  int32_t         lino = 0;
  SOpenWindowInfo openWin = {0};
  openWin.pos.pageId = pResult->pageId;
  openWin.pos.offset = pResult->offset;
  openWin.groupId = groupId;
  SListNode* pn = tdListGetTail(pResultRowInfo->openWindow);
  if (pn == NULL) {
    code = tdListAppend(pResultRowInfo->openWindow, &openWin);
    QUERY_CHECK_CODE(code, lino, _end);
    return openWin.pos;
  }

  SOpenWindowInfo* px = (SOpenWindowInfo*)pn->data;
  if (px->pos.pageId != openWin.pos.pageId || px->pos.offset != openWin.pos.offset || px->groupId != openWin.groupId) {
    code = tdListAppend(pResultRowInfo->openWindow, &openWin);
    QUERY_CHECK_CODE(code, lino, _end);
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  return openWin.pos;
}

int64_t* extractTsCol(SSDataBlock* pBlock, const SIntervalAggOperatorInfo* pInfo, SExecTaskInfo* pTaskInfo) {
  TSKEY* tsCols = NULL;

  if (pBlock->pDataBlock != NULL && pBlock->info.dataLoad) {
    SColumnInfoData* pColDataInfo = taosArrayGet(pBlock->pDataBlock, pInfo->primaryTsIndex);
    if (!pColDataInfo) {
      pTaskInfo->code = terrno;
      T_LONG_JMP(pTaskInfo->env, terrno);
    }

    tsCols = (int64_t*)pColDataInfo->pData;
    if (tsCols[0] == 0) {
      qWarn("%s at line %d.block start ts:%" PRId64 ",end ts:%" PRId64, __func__, __LINE__, tsCols[0],
            tsCols[pBlock->info.rows - 1]);
    }

    if (tsCols[0] != 0 && (pBlock->info.window.skey == 0 && pBlock->info.window.ekey == 0)) {
      int32_t code = blockDataUpdateTsWindow(pBlock, pInfo->primaryTsIndex);
      if (code != TSDB_CODE_SUCCESS) {
        qError("%s failed at line %d since %s", __func__, __LINE__, tstrerror(code));
        pTaskInfo->code = code;
        T_LONG_JMP(pTaskInfo->env, code);
      }
    }
  }

  return tsCols;
}

static int32_t doOpenIntervalAgg(SOperatorInfo* pOperator) {
  if (OPTR_IS_OPENED(pOperator)) {
    return TSDB_CODE_SUCCESS;
  }

  int32_t        code = TSDB_CODE_SUCCESS;
  int32_t        lino = 0;
  SExecTaskInfo* pTaskInfo = pOperator->pTaskInfo;
  SOperatorInfo* downstream = pOperator->pDownstream[0];

  SIntervalAggOperatorInfo* pInfo = pOperator->info;
  SExprSupp*                pSup = &pOperator->exprSupp;

  int32_t scanFlag = MAIN_SCAN;

  pInfo->cleanGroupResInfo = false;
  while (1) {
    SSDataBlock* pBlock = getNextBlockFromDownstreamRemainDetach(pOperator, 0);
    if (pBlock == NULL) {
      break;
    }

    pInfo->binfo.pRes->info.scanFlag = scanFlag = pBlock->info.scanFlag;

    if (pInfo->scalarSupp.pExprInfo != NULL) {
      SExprSupp* pExprSup = &pInfo->scalarSupp;
      code = projectApplyFunctions(pExprSup->pExprInfo, pBlock, pBlock, pExprSup->pCtx, pExprSup->numOfExprs, NULL,
                                   GET_STM_RTINFO(pOperator->pTaskInfo));
      QUERY_CHECK_CODE(code, lino, _end);
    }

    // the pDataBlock are always the same one, no need to call this again
    code = setInputDataBlock(pSup, pBlock, pInfo->binfo.inputTsOrder, scanFlag, true);
    QUERY_CHECK_CODE(code, lino, _end);
    if (hashIntervalAgg(pOperator, &pInfo->binfo.resultRowInfo, pBlock, scanFlag)) break;
  }

  code = initGroupedResultInfo(&pInfo->groupResInfo, pInfo->aggSup.pResultRowHashTable, pInfo->binfo.outputTsOrder);
  QUERY_CHECK_CODE(code, lino, _end);
  pInfo->cleanGroupResInfo = true;

  OPTR_SET_OPENED(pOperator);

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  return code;
}

// start a new state window and record the start info
void doKeepNewStateWindowStartInfo(SWindowRowsSup* pRowSup, const int64_t* tsList,
  int32_t rowIndex, uint64_t groupId, const EStateWinExtendOption* extendOption, bool hasPrevWin) {
  pRowSup->groupId = groupId;
  if (*extendOption == STATE_WIN_EXTEND_OPTION_DEFAULT ||
      *extendOption == STATE_WIN_EXTEND_OPTION_BACKWARD) {
    pRowSup->win.skey = tsList[rowIndex];
    pRowSup->startRowIndex = rowIndex;
    pRowSup->numOfRows = 0;  // does not include the current row yet
  } else {
    pRowSup->startRowIndex = hasContinuousNullRows(pRowSup) ?
      rowIndex - pRowSup->numNullRows : rowIndex;
    pRowSup->win.skey = hasPrevWin ?
                        pRowSup->win.ekey + 1 : tsList[pRowSup->startRowIndex];
    pRowSup->numOfRows = rowIndex - pRowSup->startRowIndex;
  }
  resetNumNullRows(pRowSup);
}

// close a state window and record its end info
// this functions is called when a new state row appears
// @param rowIndex the index of the first row of next window
void doKeepCurStateWindowEndInfo(SWindowRowsSup* pRowSup, const int64_t* tsList, 
                                 int32_t rowIndex,
                                 const EStateWinExtendOption* extendOption,
                                 bool hasNextWin) {
  if (*extendOption == STATE_WIN_EXTEND_OPTION_BACKWARD) {
      pRowSup->win.ekey = hasNextWin?
                          tsList[rowIndex] - 1 : pRowSup->prevTs;
      // continuous rows having null state col should be included in this window
      pRowSup->numOfRows += hasContinuousNullRows(pRowSup) ?
        pRowSup->numNullRows : 0;
      resetNumNullRows(pRowSup);
  }
}

void doKeepStateWindowNullInfo(SWindowRowsSup* pRowSup, TSKEY nullRowTs) {
  pRowSup->numNullRows += 1;
  pRowSup->prevTs = nullRowTs;
}

/**
  @brief Process the closed state window and do aggregation on the tuples
  within the window. Partial results are stored in the output buffer. If window
  has no valid rows, return success.
*/
static int32_t processClosedStateWindow(SStateWindowOperatorInfo* pInfo,
                                        SWindowRowsSup* pRowSup,
                                        SExecTaskInfo* pTaskInfo,
                                        SExprSupp* pSup,
                                        int32_t numOfOutput) {
  if (pRowSup->numOfRows == 0) {
    // no valid rows in the window
    return TSDB_CODE_SUCCESS;
  }
  int32_t     code = TSDB_CODE_SUCCESS;
  int32_t     lino = 0;
  SResultRow* pResult = NULL;
  code = setTimeWindowOutputBuf(&pInfo->binfo.resultRowInfo, &pRowSup->win,
    true, &pResult, pRowSup->groupId, pSup->pCtx, numOfOutput,
    pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
  QUERY_CHECK_CODE(code, lino, _return);

  updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pRowSup->win, 0);
  pResult->nOrigRows += pRowSup->numOfRows;
  code = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx,
    &pInfo->twAggSup.timeWindowData, pRowSup->startRowIndex,
    pRowSup->numOfRows, 0, numOfOutput);
  QUERY_CHECK_CODE(code, lino, _return);

_return:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
  }
  return code;
}

// process a data block for state window aggregation
// scan from startIndex to endIndex
// numPartialCalcRows returns the number of rows that have been
// partially calculated within the block
static void doStateWindowAggImpl(SOperatorInfo* pOperator,
                                 SStateWindowOperatorInfo* pInfo,
                                 SSDataBlock* pBlock, int32_t* startIndex,
                                 int32_t* endIndex,
                                 int32_t* numPartialCalcRows) {
  SExecTaskInfo* pTaskInfo = pOperator->pTaskInfo;
  SExprSupp*     pExprSup = &pOperator->exprSupp;

  SColumnInfoData* pStateColInfoData = 
    taosArrayGet(pBlock->pDataBlock, pInfo->stateCol.slotId);
  if (!pStateColInfoData) {
    pTaskInfo->code = terrno;
    T_LONG_JMP(pTaskInfo->env, terrno);
  }
  uint64_t gid = pBlock->info.id.groupId;
  int32_t numOfOutput = pOperator->exprSupp.numOfExprs;
  int32_t bytes = pStateColInfoData->info.bytes;

  SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock,
                                               pInfo->tsSlotId);
  if (NULL == pColInfoData) {
    pTaskInfo->code = terrno;
    T_LONG_JMP(pTaskInfo->env, terrno);
  }
  TSKEY* tsList = (TSKEY*)pColInfoData->pData;

  struct SColumnDataAgg* pAgg = (pBlock->pBlockAgg != NULL) ?
                                &pBlock->pBlockAgg[pInfo->stateCol.slotId] :
                                NULL;
  EStateWinExtendOption  extendOption = pInfo->extendOption;
  SWindowRowsSup*        pRowSup = &pInfo->winSup;

  if (pRowSup->groupId != gid) {
    /*
      group changed, process the previous group's unclosed state window first
    */
    doKeepCurStateWindowEndInfo(pRowSup, tsList, 0, &extendOption, false);
    int32_t code = processClosedStateWindow(pInfo, pRowSup, pTaskInfo,
                                            pExprSup, numOfOutput);
    if (TSDB_CODE_SUCCESS != code) T_LONG_JMP(pTaskInfo->env, code);
    *numPartialCalcRows = pRowSup->startRowIndex + pRowSup->numOfRows;

    /*
      unhandled null rows should be ignored, since they belong to previous group
    */
    *numPartialCalcRows += pRowSup->numNullRows;

    /*
      reset state window info for new group
    */
    pInfo->hasKey = false;
    resetWindowRowsSup(pRowSup);
  }

  for (int32_t j = *startIndex; j < *endIndex; ++j) {
    if (pBlock->info.scanFlag != PRE_SCAN) {
      if (pInfo->winSup.lastTs == INT64_MIN || gid != pRowSup->groupId || !pInfo->hasKey) {
        pInfo->winSup.lastTs = tsList[j];
      } else {
        if (tsList[j] == pInfo->winSup.lastTs) {
          // forbid duplicated ts rows
          qError("%s:%d duplicated ts found in state window aggregation", __FILE__, __LINE__);
          pTaskInfo->code = TSDB_CODE_QRY_WINDOW_DUP_TIMESTAMP;
          T_LONG_JMP(pTaskInfo->env, TSDB_CODE_QRY_WINDOW_DUP_TIMESTAMP);
        } else {
          pInfo->winSup.lastTs = tsList[j];
        }
      }
    }
    if (colDataIsNull(pStateColInfoData, pBlock->info.rows, j, pAgg)) {
      doKeepStateWindowNullInfo(pRowSup, tsList[j]);
      continue;
    }
    if (pStateColInfoData->pData == NULL) {
      pTaskInfo->code = TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
      T_LONG_JMP(pTaskInfo->env, TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR);
    }
    char* val = colDataGetData(pStateColInfoData, j);

    if (!pInfo->hasKey) {
      assignVal(pInfo->stateKey.pData, val, bytes, pInfo->stateKey.type);
      pInfo->hasKey = true;
      doKeepNewStateWindowStartInfo(
        pRowSup, tsList, j, gid, &extendOption, false);
      doKeepTuple(pRowSup, tsList[j], j, gid);
    } else if (!compareVal(val, &pInfo->stateKey)) {
      doKeepCurStateWindowEndInfo(pRowSup, tsList, j, &extendOption, true);
      int32_t code = processClosedStateWindow(pInfo, pRowSup, pTaskInfo,
                                              pExprSup, numOfOutput);
      if (TSDB_CODE_SUCCESS != code) {
        T_LONG_JMP(pTaskInfo->env, code);
      }
      *numPartialCalcRows = pRowSup->startRowIndex + pRowSup->numOfRows;

      doKeepNewStateWindowStartInfo(pRowSup, tsList, j, gid,
                                    &extendOption, true);
      doKeepTuple(pRowSup, tsList[j], j, gid);
      assignVal(pInfo->stateKey.pData, val, bytes, pInfo->stateKey.type);
    } else {
      doKeepTuple(pRowSup, tsList[j], j, gid);
    }
  }

  if (!pInfo->hasKey && extendOption != STATE_WIN_EXTEND_OPTION_FORWARD) {
    /*
      No valid state rows within the block and we don't care about
      null rows before valid state window, mark them as processed and drop them
    */
    *numPartialCalcRows = pBlock->info.rows;
    resetNumNullRows(pRowSup);
    return;
  }
  if (pRowSup->numOfRows == 0 && 
      extendOption != STATE_WIN_EXTEND_OPTION_BACKWARD) {
    /*
      If no valid state window or we don't know the belonging of
      null rows in the end of the block, handle them with next block
    */
    return;
  }
  doKeepCurStateWindowEndInfo(pRowSup, tsList, *endIndex, &extendOption, false);
  int32_t code = processClosedStateWindow(pInfo, pRowSup, pTaskInfo,
                                          pExprSup, numOfOutput);
  if (TSDB_CODE_SUCCESS != code) {
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  *numPartialCalcRows = pRowSup->startRowIndex + pRowSup->numOfRows;
  // reset part of pRowSup after doing agg calculation
  pRowSup->startRowIndex = 0;
  pRowSup->numOfRows = 0;
}

static int32_t openStateWindowAggOptr(SOperatorInfo* pOperator) {
  if (OPTR_IS_OPENED(pOperator)) {
    return TSDB_CODE_SUCCESS;
  }

  int32_t                   code = TSDB_CODE_SUCCESS;
  int32_t                   lino = 0;
  SStateWindowOperatorInfo* pInfo = pOperator->info;
  SExecTaskInfo*            pTaskInfo = pOperator->pTaskInfo;

  SExprSupp* pSup = &pOperator->exprSupp;
  int32_t    order = pInfo->binfo.inputTsOrder;

  SOperatorInfo* downstream = pOperator->pDownstream[0];
  pInfo->cleanGroupResInfo = false;

  SSDataBlock* pUnfinishedBlock = NULL;
  int32_t      startIndex = 0;
  int32_t      endIndex = 0;
  int32_t      numPartialCalcRows = 0;
  while (1) {
    SSDataBlock* pBlock = getNextBlockFromDownstream(pOperator, 0);
    if (pBlock == NULL) {
      if (pUnfinishedBlock != NULL) {
        blockDataDestroy(pUnfinishedBlock);
        pUnfinishedBlock = NULL;
        resetWindowRowsSup(&pInfo->winSup);
      }
      break;
    }
    
    // mark whether pUnfinishedBlock is a reference to pBlock
    bool isRef = false;
    startIndex = 0;
    if (pUnfinishedBlock != NULL) {
      startIndex = pUnfinishedBlock->info.rows;
      // merge unfinished block with current block
      code = blockDataMerge(pUnfinishedBlock, pBlock);
      // reset id to current block id
      pUnfinishedBlock->info.id = pBlock->info.id;
      QUERY_CHECK_CODE(code, lino, _end);
    } else {
      pUnfinishedBlock = pBlock;
      isRef = true;
    }
    endIndex = pUnfinishedBlock->info.rows;

    pInfo->binfo.pRes->info.scanFlag = pUnfinishedBlock->info.scanFlag;
    pInfo->binfo.pRes->info.dataLoad = 1;
    code = setInputDataBlock(
      pSup, pUnfinishedBlock, order, pUnfinishedBlock->info.scanFlag, true);
    QUERY_CHECK_CODE(code, lino, _end);

    code = blockDataUpdateTsWindow(pUnfinishedBlock, pInfo->tsSlotId);
    QUERY_CHECK_CODE(code, lino, _end);

    // there is an scalar expression that 
    // needs to be calculated right before apply the group aggregation.
    if (pInfo->scalarSup.pExprInfo != NULL) {
      pTaskInfo->code = projectApplyFunctions(pInfo->scalarSup.pExprInfo,
        pUnfinishedBlock, pUnfinishedBlock, pInfo->scalarSup.pCtx,
        pInfo->scalarSup.numOfExprs, NULL,
        GET_STM_RTINFO(pOperator->pTaskInfo));
      if (pTaskInfo->code != TSDB_CODE_SUCCESS) {
        T_LONG_JMP(pTaskInfo->env, pTaskInfo->code);
      }
    }

    doStateWindowAggImpl(pOperator, pInfo, pUnfinishedBlock, 
      &startIndex, &endIndex, &numPartialCalcRows);
    if (numPartialCalcRows < pUnfinishedBlock->info.rows) {
      // save unfinished block for next round processing
      if (isRef) {
        code = createOneDataBlock(pBlock, true, &pUnfinishedBlock);
        QUERY_CHECK_CODE(code, lino, _end);
      }
      code = blockDataTrimFirstRows(pUnfinishedBlock, numPartialCalcRows);
      QUERY_CHECK_NULL(pUnfinishedBlock, code, lino, _end, terrno);
    } else {
      if (!isRef) {
        blockDataDestroy(pUnfinishedBlock);
      }
      pUnfinishedBlock = NULL;
    }
    numPartialCalcRows = 0;
  }

  code = initGroupedResultInfo(
    &pInfo->groupResInfo, pInfo->aggSup.pResultRowHashTable, TSDB_ORDER_ASC);
  QUERY_CHECK_CODE(code, lino, _end);
  pInfo->cleanGroupResInfo = true;
  pOperator->status = OP_RES_TO_RETURN;

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  return code;
}

static int32_t doStateWindowAggNext(SOperatorInfo* pOperator, SSDataBlock** ppRes) {
  if (pOperator->status == OP_EXEC_DONE) {
    (*ppRes) = NULL;
    return TSDB_CODE_SUCCESS;
  }

  int32_t                   code = TSDB_CODE_SUCCESS;
  int32_t                   lino = 0;
  SExecTaskInfo*            pTaskInfo = pOperator->pTaskInfo;
  SStateWindowOperatorInfo* pInfo = pOperator->info;
  SOptrBasicInfo*           pBInfo = &pInfo->binfo;

  code = pOperator->fpSet._openFn(pOperator);
  QUERY_CHECK_CODE(code, lino, _end);

  code = blockDataEnsureCapacity(pBInfo->pRes, pOperator->resultInfo.capacity);
  QUERY_CHECK_CODE(code, lino, _end);

  while (1) {
    doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
    code = doFilter(pBInfo->pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
    QUERY_CHECK_CODE(code, lino, _end);

    bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
    if (!hasRemain) {
      setOperatorCompleted(pOperator);
      break;
    }

    if (pBInfo->pRes->info.rows > 0) {
      break;
    }
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  (*ppRes) = (pBInfo->pRes->info.rows == 0) ? NULL : pBInfo->pRes;
  return code;
}

static int32_t doBuildIntervalResultNext(SOperatorInfo* pOperator, SSDataBlock** ppRes) {
  int32_t                   code = TSDB_CODE_SUCCESS;
  int32_t                   lino = 0;
  SIntervalAggOperatorInfo* pInfo = pOperator->info;
  SExecTaskInfo*            pTaskInfo = pOperator->pTaskInfo;

  if (pOperator->status == OP_EXEC_DONE && !pOperator->pOperatorGetParam) {
    (*ppRes) = NULL;
    return code;
  }

  if (pOperator->pOperatorGetParam) {
    if (pOperator->status == OP_EXEC_DONE && pOperator->fpSet.resetStateFn) {
      code = pOperator->fpSet.resetStateFn(pOperator);
      QUERY_CHECK_CODE(code, lino, _end);
    }
    freeOperatorParam(pOperator->pOperatorGetParam, OP_GET_PARAM);
    pOperator->pOperatorGetParam = NULL;
  }

  SSDataBlock* pBlock = pInfo->binfo.pRes;
  code = pOperator->fpSet._openFn(pOperator);
  QUERY_CHECK_CODE(code, lino, _end);

  while (1) {
    doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
    code = doFilter(pBlock, pOperator->exprSupp.pFilterInfo, NULL, NULL);
    QUERY_CHECK_CODE(code, lino, _end);

    bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
    if (!hasRemain) {
      setOperatorCompleted(pOperator);
      break;
    }

    if (pBlock->info.rows > 0) {
      break;
    }
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  (*ppRes) = (pBlock->info.rows == 0) ? NULL : pBlock;
  return code;
}

static void destroyStateWindowOperatorInfo(void* param) {
  if (param == NULL) {
    return;
  }
  SStateWindowOperatorInfo* pInfo = (SStateWindowOperatorInfo*)param;
  cleanupBasicInfo(&pInfo->binfo);
  taosMemoryFreeClear(pInfo->stateKey.pData);
  if (pInfo->pOperator) {
    cleanupResultInfo(pInfo->pOperator->pTaskInfo, &pInfo->pOperator->exprSupp, &pInfo->groupResInfo, &pInfo->aggSup,
                      pInfo->cleanGroupResInfo);
    pInfo->pOperator = NULL;
  }

  cleanupExprSupp(&pInfo->scalarSup);
  colDataDestroy(&pInfo->twAggSup.timeWindowData);
  cleanupAggSup(&pInfo->aggSup);
  cleanupGroupResInfo(&pInfo->groupResInfo);

  taosMemoryFreeClear(param);
}

static void freeItem(void* param) {
  SGroupKeys* pKey = (SGroupKeys*)param;
  taosMemoryFree(pKey->pData);
}

void destroyIntervalOperatorInfo(void* param) {
  if (param == NULL) {
    return;
  }

  SIntervalAggOperatorInfo* pInfo = (SIntervalAggOperatorInfo*)param;

  cleanupBasicInfo(&pInfo->binfo);
  if (pInfo->pOperator) {
    cleanupResultInfo(pInfo->pOperator->pTaskInfo, &pInfo->pOperator->exprSupp, &pInfo->groupResInfo, &pInfo->aggSup,
                      pInfo->cleanGroupResInfo);
    pInfo->pOperator = NULL;
  }

  cleanupAggSup(&pInfo->aggSup);
  cleanupExprSupp(&pInfo->scalarSupp);

  pInfo->binfo.resultRowInfo.openWindow = tdListFree(pInfo->binfo.resultRowInfo.openWindow);

  taosArrayDestroy(pInfo->pInterpCols);
  pInfo->pInterpCols = NULL;

  taosArrayDestroyEx(pInfo->pPrevValues, freeItem);
  pInfo->pPrevValues = NULL;

  cleanupGroupResInfo(&pInfo->groupResInfo);
  colDataDestroy(&pInfo->twAggSup.timeWindowData);
  destroyBoundedQueue(pInfo->pBQ);
  taosMemoryFreeClear(param);
}

static int32_t initWindowInterpPrevVal(SIntervalAggOperatorInfo* pInfo) {
  int32_t code = TSDB_CODE_SUCCESS;
  int32_t lino = 0;
  void*   tmp = NULL;

  pInfo->pInterpCols = taosArrayInit(4, sizeof(SColumn));
  QUERY_CHECK_NULL(pInfo->pInterpCols, code, lino, _end, terrno);

  pInfo->pPrevValues = taosArrayInit(4, sizeof(SGroupKeys));
  QUERY_CHECK_NULL(pInfo->pPrevValues, code, lino, _end, terrno);

  {  // ts column
    SColumn c = {0};
    c.colId = 1;
    c.slotId = pInfo->primaryTsIndex;
    c.type = TSDB_DATA_TYPE_TIMESTAMP;
    c.bytes = sizeof(int64_t);
    tmp = taosArrayPush(pInfo->pInterpCols, &c);
    QUERY_CHECK_NULL(tmp, code, lino, _end, terrno);

    SGroupKeys key;
    key.bytes = c.bytes;
    key.type = c.type;
    key.isNull = true;  // to denote no value is assigned yet
    key.pData = taosMemoryCalloc(1, c.bytes);
    QUERY_CHECK_NULL(key.pData, code, lino, _end, terrno);

    tmp = taosArrayPush(pInfo->pPrevValues, &key);
    QUERY_CHECK_NULL(tmp, code, lino, _end, terrno);
  }
_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
  }
  return code;
}

static int32_t timeWindowinterpNeeded(SqlFunctionCtx* pCtx, int32_t numOfCols, SIntervalAggOperatorInfo* pInfo,
                                      bool* pRes) {
  // the primary timestamp column
  bool    needed = false;
  int32_t code = TSDB_CODE_SUCCESS;
  int32_t lino = 0;
  void*   tmp = NULL;

  for (int32_t i = 0; i < numOfCols; ++i) {
    SExprInfo* pExpr = pCtx[i].pExpr;
    if (fmIsIntervalInterpoFunc(pCtx[i].functionId)) {
      needed = true;
      break;
    }
  }

  if (needed) {
    code = initWindowInterpPrevVal(pInfo);
    QUERY_CHECK_CODE(code, lino, _end);
  }

  for (int32_t i = 0; i < numOfCols; ++i) {
    SExprInfo* pExpr = pCtx[i].pExpr;

    if (fmIsIntervalInterpoFunc(pCtx[i].functionId)) {
      SFunctParam* pParam = &pExpr->base.pParam[0];

      SColumn c = *pParam->pCol;
      tmp = taosArrayPush(pInfo->pInterpCols, &c);
      QUERY_CHECK_NULL(tmp, code, lino, _end, terrno);

      SGroupKeys key = {0};
      key.bytes = c.bytes;
      key.type = c.type;
      key.isNull = false;
      key.pData = taosMemoryCalloc(1, c.bytes);
      QUERY_CHECK_NULL(key.pData, code, lino, _end, terrno);

      tmp = taosArrayPush(pInfo->pPrevValues, &key);
      QUERY_CHECK_NULL(tmp, code, lino, _end, terrno);
    }
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
  }
  *pRes = needed;
  return code;
}

static int32_t resetInterval(SOperatorInfo* pOper, SIntervalAggOperatorInfo* pIntervalInfo){
  SExecTaskInfo*           pTaskInfo = pOper->pTaskInfo;
  SIntervalPhysiNode* pPhynode = (SIntervalPhysiNode*)pOper->pPhyNode;
  pOper->status = OP_NOT_OPENED;

  resetBasicOperatorState(&pIntervalInfo->binfo);
  cleanupResultInfo(pIntervalInfo->pOperator->pTaskInfo, &pIntervalInfo->pOperator->exprSupp, &pIntervalInfo->groupResInfo, &pIntervalInfo->aggSup,
    pIntervalInfo->cleanGroupResInfo);

  colDataDestroy(&pIntervalInfo->twAggSup.timeWindowData);
  int32_t code = initExecTimeWindowInfo(&pIntervalInfo->twAggSup.timeWindowData, &pTaskInfo->window);
  if (code == 0) {
    code = resetAggSup(&pOper->exprSupp, &pIntervalInfo->aggSup, pTaskInfo, pPhynode->window.pFuncs, NULL,
                       sizeof(int64_t) * 2 + POINTER_BYTES, pTaskInfo->id.str, NULL,
                       &pTaskInfo->storageAPI.functionStore);
  }
  if (code == 0) {
    code = resetExprSupp(&pIntervalInfo->scalarSupp, pTaskInfo, pPhynode->window.pExprs, NULL,
                         &pTaskInfo->storageAPI.functionStore);
  }

  if (pIntervalInfo->binfo.resultRowInfo.openWindow != NULL){
    tdListEmpty(pIntervalInfo->binfo.resultRowInfo.openWindow);
  }

  if (pPhynode->window.node.pSlimit && ((SLimitNode*)pPhynode->window.node.pSlimit)->limit) {
    pIntervalInfo->curGroupId = UINT64_MAX;
  }

  pIntervalInfo->cleanGroupResInfo = false;
  pIntervalInfo->handledGroupNum = 0;
  pIntervalInfo->binfo.inputTsOrder = pPhynode->window.node.inputTsOrder;
  pIntervalInfo->binfo.outputTsOrder = pPhynode->window.node.outputTsOrder;

  taosArrayDestroy(pIntervalInfo->pInterpCols);
  pIntervalInfo->pInterpCols = NULL;

  if (pIntervalInfo->pPrevValues != NULL) {
    taosArrayDestroyEx(pIntervalInfo->pPrevValues, freeItem);
    pIntervalInfo->pPrevValues = NULL;
    code = initWindowInterpPrevVal(pIntervalInfo);
  }

  cleanupGroupResInfo(&pIntervalInfo->groupResInfo);
  destroyBoundedQueue(pIntervalInfo->pBQ);
  pIntervalInfo->pBQ = NULL;
  return code;
}

static int32_t resetIntervalOperState(SOperatorInfo* pOper) {
  SIntervalAggOperatorInfo* pInfo = pOper->info;
  return resetInterval(pOper, pInfo);
}

int32_t createIntervalOperatorInfo(SOperatorInfo* downstream, SIntervalPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo,
                                   SOperatorInfo** pOptrInfo) {
  QRY_PARAM_CHECK(pOptrInfo);

  int32_t                   code = TSDB_CODE_SUCCESS;
  int32_t                   lino = 0;
  SIntervalAggOperatorInfo* pInfo = taosMemoryCalloc(1, sizeof(SIntervalAggOperatorInfo));
  SOperatorInfo*            pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
  if (pInfo == NULL || pOperator == NULL) {
    code = terrno;
    lino = __LINE__;
    goto _error;
  }
  initOperatorCostInfo(pOperator);

  pOperator->pPhyNode = pPhyNode;
  SSDataBlock* pResBlock = createDataBlockFromDescNode(pPhyNode->window.node.pOutputDataBlockDesc);
  QUERY_CHECK_NULL(pResBlock, code, lino, _error, terrno);
  initBasicInfo(&pInfo->binfo, pResBlock);

  SExprSupp* pSup = &pOperator->exprSupp;
  pSup->hasWindowOrGroup = true;
  pSup->hasWindow = true;

  pInfo->primaryTsIndex = ((SColumnNode*)pPhyNode->window.pTspk)->slotId;

  size_t keyBufSize = sizeof(int64_t) + sizeof(int64_t) + POINTER_BYTES;
  initResultSizeInfo(&pOperator->resultInfo, 512);
  code = blockDataEnsureCapacity(pInfo->binfo.pRes, pOperator->resultInfo.capacity);
  QUERY_CHECK_CODE(code, lino, _error);

  int32_t    num = 0;
  SExprInfo* pExprInfo = NULL;
  code = createExprInfo(pPhyNode->window.pFuncs, NULL, &pExprInfo, &num);
  QUERY_CHECK_CODE(code, lino, _error);

  code = initAggSup(pSup, &pInfo->aggSup, pExprInfo, num, keyBufSize, pTaskInfo->id.str, NULL,
                    &pTaskInfo->storageAPI.functionStore);
  QUERY_CHECK_CODE(code, lino, _error);

  SInterval interval = {.interval = pPhyNode->interval,
                        .sliding = pPhyNode->sliding,
                        .intervalUnit = pPhyNode->intervalUnit,
                        .slidingUnit = pPhyNode->slidingUnit,
                        .offset = pPhyNode->offset,
                        .precision = ((SColumnNode*)pPhyNode->window.pTspk)->node.resType.precision,
                        .timeRange = pPhyNode->timeRange};
  calcIntervalAutoOffset(&interval);

  STimeWindowAggSupp as = {
      .maxTs = INT64_MIN,
  };

  pInfo->win = pTaskInfo->window;
  pInfo->binfo.inputTsOrder = pPhyNode->window.node.inputTsOrder;
  pInfo->binfo.outputTsOrder = pPhyNode->window.node.outputTsOrder;
  pInfo->interval = interval;
  pInfo->twAggSup = as;
  pInfo->binfo.mergeResultBlock = pPhyNode->window.mergeDataBlock;
  if (pPhyNode->window.node.pLimit && ((SLimitNode*)pPhyNode->window.node.pLimit)->limit) {
    SLimitNode* pLimit = (SLimitNode*)pPhyNode->window.node.pLimit;
    pInfo->limited = true;
    pInfo->limit = pLimit->limit->datum.i + (pLimit->offset ? pLimit->offset->datum.i : 0);
  }
  if (pPhyNode->window.node.pSlimit && ((SLimitNode*)pPhyNode->window.node.pSlimit)->limit) {
    SLimitNode* pLimit = (SLimitNode*)pPhyNode->window.node.pSlimit;
    pInfo->slimited = true;
    pInfo->slimit = pLimit->limit->datum.i + (pLimit->offset ? pLimit->offset->datum.i : 0);
    pInfo->curGroupId = UINT64_MAX;
  }

  if (pPhyNode->window.pExprs != NULL) {
    int32_t    numOfScalar = 0;
    SExprInfo* pScalarExprInfo = NULL;
    code = createExprInfo(pPhyNode->window.pExprs, NULL, &pScalarExprInfo, &numOfScalar);
    QUERY_CHECK_CODE(code, lino, _error);

    code = initExprSupp(&pInfo->scalarSupp, pScalarExprInfo, numOfScalar, &pTaskInfo->storageAPI.functionStore);
    if (code != TSDB_CODE_SUCCESS) {
      goto _error;
    }
  }

  code = filterInitFromNode((SNode*)pPhyNode->window.node.pConditions, &pOperator->exprSupp.pFilterInfo, 0,
                            pTaskInfo->pStreamRuntimeInfo);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  code = initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pInfo->win);
  QUERY_CHECK_CODE(code, lino, _error);

  pInfo->timeWindowInterpo = false;
  code = timeWindowinterpNeeded(pSup->pCtx, num, pInfo, &pInfo->timeWindowInterpo);
  QUERY_CHECK_CODE(code, lino, _error);
  if (pInfo->timeWindowInterpo) {
    pInfo->binfo.resultRowInfo.openWindow = tdListNew(sizeof(SOpenWindowInfo));
    if (pInfo->binfo.resultRowInfo.openWindow == NULL) {
      goto _error;
    }
  }

  pInfo->pOperator = pOperator;
  pInfo->cleanGroupResInfo = false;
  initResultRowInfo(&pInfo->binfo.resultRowInfo);
  setOperatorInfo(pOperator, "TimeIntervalAggOperator", QUERY_NODE_PHYSICAL_PLAN_HASH_INTERVAL, true, OP_NOT_OPENED,
                  pInfo, pTaskInfo);

  pOperator->fpSet = createOperatorFpSet(doOpenIntervalAgg, doBuildIntervalResultNext, NULL, destroyIntervalOperatorInfo,
                                         optrDefaultBufFn, NULL, optrDefaultGetNextExtFn, NULL);
  setOperatorResetStateFn(pOperator, resetIntervalOperState);
  code = appendDownstream(pOperator, &downstream, 1);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  *pOptrInfo = pOperator;
  return TSDB_CODE_SUCCESS;

_error:
  if (pInfo != NULL) {
    destroyIntervalOperatorInfo(pInfo);
  }

  destroyOperatorAndDownstreams(pOperator, &downstream, 1);
  pTaskInfo->code = code;
  qError("error happens at %s %d, code:%s", __func__, lino, tstrerror(code));
  return code;
}

// todo handle multiple timeline cases. assume no timeline interweaving
static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSessionAggOperatorInfo* pInfo, SSDataBlock* pBlock) {
  SExecTaskInfo* pTaskInfo = pOperator->pTaskInfo;
  SExprSupp*     pSup = &pOperator->exprSupp;

  SColumnInfoData* pColInfoData = taosArrayGet(pBlock->pDataBlock, pInfo->tsSlotId);
  if (!pColInfoData) {
    pTaskInfo->code = terrno;
    T_LONG_JMP(pTaskInfo->env, terrno);
  }

  bool    masterScan = true;
  int32_t numOfOutput = pOperator->exprSupp.numOfExprs;
  int64_t gid = pBlock->info.id.groupId;

  int64_t gap = pInfo->gap;

  if (!pInfo->reptScan) {
    pInfo->reptScan = true;
    pInfo->winSup.prevTs = INT64_MIN;
  }

  SWindowRowsSup* pRowSup = &pInfo->winSup;
  pRowSup->numOfRows = 0;
  pRowSup->startRowIndex = 0;

  // In case of ascending or descending order scan data, only one time window needs to be kepted for each table.
  TSKEY* tsList = (TSKEY*)pColInfoData->pData;
  for (int32_t j = 0; j < pBlock->info.rows; ++j) {
    if (gid != pRowSup->groupId || pInfo->winSup.prevTs == INT64_MIN) {
      doKeepNewWindowStartInfo(pRowSup, tsList, j, gid);
      doKeepTuple(pRowSup, tsList[j], j, gid);
    } else if (((tsList[j] - pRowSup->prevTs >= 0) && (tsList[j] - pRowSup->prevTs <= gap)) ||
               ((pRowSup->prevTs - tsList[j] >= 0) && (pRowSup->prevTs - tsList[j] <= gap))) {
      // The gap is less than the threshold, so it belongs to current session window that has been opened already.
      doKeepTuple(pRowSup, tsList[j], j, gid);
    } else {  // start a new session window
      // start a new session window
      if (pRowSup->numOfRows > 0) {  // handled data that belongs to the previous session window
        SResultRow* pResult = NULL;

        // keep the time window for the closed time window.
        STimeWindow window = pRowSup->win;

        int32_t ret =
            setTimeWindowOutputBuf(&pInfo->binfo.resultRowInfo, &window, masterScan, &pResult, gid, pSup->pCtx,
                                   numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
        if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
          T_LONG_JMP(pTaskInfo->env, ret);
        }

        // pInfo->numOfRows data belong to the current session window
        updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &window, 0);
        ret =
            applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &pInfo->twAggSup.timeWindowData,
                                            pRowSup->startRowIndex, pRowSup->numOfRows, pBlock->info.rows, numOfOutput);
        if (ret != TSDB_CODE_SUCCESS) {
          T_LONG_JMP(pTaskInfo->env, ret);
        }
      }

      // here we start a new session window
      doKeepNewWindowStartInfo(pRowSup, tsList, j, gid);
      doKeepTuple(pRowSup, tsList[j], j, gid);
    }
  }

  SResultRow* pResult = NULL;
  pRowSup->win.ekey = tsList[pBlock->info.rows - 1];
  int32_t ret = setTimeWindowOutputBuf(&pInfo->binfo.resultRowInfo, &pRowSup->win, masterScan, &pResult, gid,
                                       pSup->pCtx, numOfOutput, pSup->rowEntryInfoOffset, &pInfo->aggSup, pTaskInfo);
  if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
    T_LONG_JMP(pTaskInfo->env, ret);
  }

  updateTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pRowSup->win, 0);
  ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &pInfo->twAggSup.timeWindowData, pRowSup->startRowIndex,
                                        pRowSup->numOfRows, pBlock->info.rows, numOfOutput);
  if (ret != TSDB_CODE_SUCCESS) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }
}

static int32_t doSessionWindowAggNext(SOperatorInfo* pOperator, SSDataBlock** ppRes) {
  if (pOperator->status == OP_EXEC_DONE) {
    (*ppRes) = NULL;
    return TSDB_CODE_SUCCESS;
  }

  int32_t                  code = TSDB_CODE_SUCCESS;
  int32_t                  lino = 0;
  SExecTaskInfo*           pTaskInfo = pOperator->pTaskInfo;
  SSessionAggOperatorInfo* pInfo = pOperator->info;
  SOptrBasicInfo*          pBInfo = &pInfo->binfo;
  SExprSupp*               pSup = &pOperator->exprSupp;

  if (pOperator->status == OP_RES_TO_RETURN) {
    while (1) {
      doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
      code = doFilter(pBInfo->pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
      QUERY_CHECK_CODE(code, lino, _end);

      bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
      if (!hasRemain) {
        setOperatorCompleted(pOperator);
        break;
      }

      if (pBInfo->pRes->info.rows > 0) {
        break;
      }
    }
    (*ppRes) = (pBInfo->pRes->info.rows == 0) ? NULL : pBInfo->pRes;
    return code;
  }

  int32_t order = pInfo->binfo.inputTsOrder;

  SOperatorInfo* downstream = pOperator->pDownstream[0];

  pInfo->cleanGroupResInfo = false;
  while (1) {
    SSDataBlock* pBlock = getNextBlockFromDownstream(pOperator, 0);
    if (pBlock == NULL) {
      break;
    }

    pBInfo->pRes->info.scanFlag = pBlock->info.scanFlag;
    pBInfo->pRes->info.dataLoad = 1;
    if (pInfo->scalarSupp.pExprInfo != NULL) {
      SExprSupp* pExprSup = &pInfo->scalarSupp;
      code = projectApplyFunctions(pExprSup->pExprInfo, pBlock, pBlock, pExprSup->pCtx, pExprSup->numOfExprs, NULL,
                                   GET_STM_RTINFO(pOperator->pTaskInfo));
      QUERY_CHECK_CODE(code, lino, _end);
    }
    // the pDataBlock are always the same one, no need to call this again
    code = setInputDataBlock(pSup, pBlock, order, pBlock->info.scanFlag, true);
    QUERY_CHECK_CODE(code, lino, _end);

    code = blockDataUpdateTsWindow(pBlock, pInfo->tsSlotId);
    QUERY_CHECK_CODE(code, lino, _end);

    doSessionWindowAggImpl(pOperator, pInfo, pBlock);
  }

  // restore the value
  pOperator->status = OP_RES_TO_RETURN;

  code = initGroupedResultInfo(&pInfo->groupResInfo, pInfo->aggSup.pResultRowHashTable, TSDB_ORDER_ASC);
  QUERY_CHECK_CODE(code, lino, _end);
  pInfo->cleanGroupResInfo = true;

  code = blockDataEnsureCapacity(pBInfo->pRes, pOperator->resultInfo.capacity);
  QUERY_CHECK_CODE(code, lino, _end);
  while (1) {
    doBuildResultDatablock(pOperator, &pInfo->binfo, &pInfo->groupResInfo, pInfo->aggSup.pResultBuf);
    code = doFilter(pBInfo->pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
    QUERY_CHECK_CODE(code, lino, _end);

    bool hasRemain = hasRemainResults(&pInfo->groupResInfo);
    if (!hasRemain) {
      setOperatorCompleted(pOperator);
      break;
    }

    if (pBInfo->pRes->info.rows > 0) {
      break;
    }
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  (*ppRes) = (pBInfo->pRes->info.rows == 0) ? NULL : pBInfo->pRes;
  return code;
}

static int32_t resetStatewindowOperState(SOperatorInfo* pOper) {
  SStateWindowOperatorInfo* pInfo = pOper->info;
  SExecTaskInfo*           pTaskInfo = pOper->pTaskInfo;
  SStateWindowPhysiNode* pPhynode = (SStateWindowPhysiNode*)pOper->pPhyNode;
  pOper->status = OP_NOT_OPENED;

  resetBasicOperatorState(&pInfo->binfo);
  cleanupResultInfo(pInfo->pOperator->pTaskInfo, &pInfo->pOperator->exprSupp, &pInfo->groupResInfo, &pInfo->aggSup,
                    pInfo->cleanGroupResInfo);

  colDataDestroy(&pInfo->twAggSup.timeWindowData);
  int32_t code = initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pTaskInfo->window);
  if (code == 0) {
    code = resetAggSup(&pOper->exprSupp, &pInfo->aggSup, pTaskInfo, pPhynode->window.pFuncs, NULL,
                       sizeof(int64_t) * 2 + POINTER_BYTES, pTaskInfo->id.str, NULL,
                       &pTaskInfo->storageAPI.functionStore);
  }
  if (code == 0) {
    code = resetExprSupp(&pInfo->scalarSup, pTaskInfo, pPhynode->window.pExprs, NULL,
                         &pTaskInfo->storageAPI.functionStore);
  }

  pInfo->cleanGroupResInfo = false;
  pInfo->hasKey = false;
  pInfo->winSup.lastTs = INT64_MIN;
  cleanupGroupResInfo(&pInfo->groupResInfo);
  memset(pInfo->stateKey.pData, 0, pInfo->stateKey.bytes);
  return code;
}

// todo make this as an non-blocking operator
int32_t createStatewindowOperatorInfo(SOperatorInfo* downstream, SStateWindowPhysiNode* pStateNode,
                                      SExecTaskInfo* pTaskInfo, SOperatorInfo** pOptrInfo) {
  QRY_PARAM_CHECK(pOptrInfo);

  int32_t                   code = TSDB_CODE_SUCCESS;
  int32_t                   lino = 0;
  SStateWindowOperatorInfo* pInfo = taosMemoryCalloc(1, sizeof(SStateWindowOperatorInfo));
  SOperatorInfo*            pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
  if (pInfo == NULL || pOperator == NULL) {
    code = terrno;
    goto _error;
  }
  initOperatorCostInfo(pOperator);

  pOperator->pPhyNode = pStateNode;
  pOperator->exprSupp.hasWindowOrGroup = true;
  pOperator->exprSupp.hasWindow = true;
  int32_t      tsSlotId = ((SColumnNode*)pStateNode->window.pTspk)->slotId;
  SColumnNode* pColNode = (SColumnNode*)(pStateNode->pStateKey);

  if (pStateNode->window.pExprs != NULL) {
    int32_t    numOfScalarExpr = 0;
    SExprInfo* pScalarExprInfo = NULL;
    code = createExprInfo(pStateNode->window.pExprs, NULL, &pScalarExprInfo, &numOfScalarExpr);
    QUERY_CHECK_CODE(code, lino, _error);

    code = initExprSupp(&pInfo->scalarSup, pScalarExprInfo, numOfScalarExpr, &pTaskInfo->storageAPI.functionStore);
    if (code != TSDB_CODE_SUCCESS) {
      goto _error;
    }
  }

  pInfo->stateCol = extractColumnFromColumnNode(pColNode);
  pInfo->stateKey.type = pInfo->stateCol.type;
  pInfo->stateKey.bytes = pInfo->stateCol.bytes;
  pInfo->stateKey.pData = taosMemoryCalloc(1, pInfo->stateCol.bytes);
  if (pInfo->stateKey.pData == NULL) {
    goto _error;
  }
  pInfo->binfo.inputTsOrder = pStateNode->window.node.inputTsOrder;
  pInfo->binfo.outputTsOrder = pStateNode->window.node.outputTsOrder;

  code = filterInitFromNode((SNode*)pStateNode->window.node.pConditions, &pOperator->exprSupp.pFilterInfo, 0,
                            pTaskInfo->pStreamRuntimeInfo);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  size_t keyBufSize = sizeof(int64_t) + sizeof(int64_t) + POINTER_BYTES;

  int32_t    num = 0;
  SExprInfo* pExprInfo = NULL;
  code = createExprInfo(pStateNode->window.pFuncs, NULL, &pExprInfo, &num);
  QUERY_CHECK_CODE(code, lino, _error);

  initResultSizeInfo(&pOperator->resultInfo, 4096);

  code = initAggSup(&pOperator->exprSupp, &pInfo->aggSup, pExprInfo, num, keyBufSize, pTaskInfo->id.str,
                    NULL, &pTaskInfo->storageAPI.functionStore);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  SSDataBlock* pResBlock = createDataBlockFromDescNode(pStateNode->window.node.pOutputDataBlockDesc);
  QUERY_CHECK_NULL(pResBlock, code, lino, _error, terrno);
  initBasicInfo(&pInfo->binfo, pResBlock);
  initResultRowInfo(&pInfo->binfo.resultRowInfo);

  code = initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pTaskInfo->window);
  QUERY_CHECK_CODE(code, lino, _error);

  pInfo->tsSlotId = tsSlotId;
  pInfo->pOperator = pOperator;
  pInfo->cleanGroupResInfo = false;
  pInfo->extendOption = pStateNode->extendOption;
  pInfo->trueForInfo.trueForType = pStateNode->trueForType;
  pInfo->trueForInfo.count = pStateNode->trueForCount;
  pInfo->trueForInfo.duration = pStateNode->trueForDuration;
  pInfo->winSup.lastTs = INT64_MIN;

  setOperatorInfo(pOperator, "StateWindowOperator", QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE, true, OP_NOT_OPENED, pInfo,
                  pTaskInfo);
  pOperator->fpSet = createOperatorFpSet(openStateWindowAggOptr, doStateWindowAggNext, NULL, destroyStateWindowOperatorInfo,
                                         optrDefaultBufFn, NULL, optrDefaultGetNextExtFn, NULL);
  setOperatorResetStateFn(pOperator, resetStatewindowOperState);

  code = appendDownstream(pOperator, &downstream, 1);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  *pOptrInfo = pOperator;
  return TSDB_CODE_SUCCESS;

_error:
  if (pInfo != NULL) {
    destroyStateWindowOperatorInfo(pInfo);
  }

  destroyOperatorAndDownstreams(pOperator, &downstream, 1);
  pTaskInfo->code = code;
  return code;
}

void destroySWindowOperatorInfo(void* param) {
  SSessionAggOperatorInfo* pInfo = (SSessionAggOperatorInfo*)param;
  if (pInfo == NULL) {
    return;
  }

  cleanupBasicInfo(&pInfo->binfo);
  colDataDestroy(&pInfo->twAggSup.timeWindowData);
  if (pInfo->pOperator) {
    cleanupResultInfo(pInfo->pOperator->pTaskInfo, &pInfo->pOperator->exprSupp, &pInfo->groupResInfo, &pInfo->aggSup,
                      pInfo->cleanGroupResInfo);
    pInfo->pOperator = NULL;
  }

  cleanupAggSup(&pInfo->aggSup);
  cleanupExprSupp(&pInfo->scalarSupp);

  cleanupGroupResInfo(&pInfo->groupResInfo);
  taosMemoryFreeClear(param);
}

static int32_t resetSessionAggOperState(SOperatorInfo* pOper) {
  SSessionAggOperatorInfo* pInfo = pOper->info;
  SExecTaskInfo*           pTaskInfo = pOper->pTaskInfo;
  SSessionWinodwPhysiNode* pPhynode = (SSessionWinodwPhysiNode*)pOper->pPhyNode;
  pOper->status = OP_NOT_OPENED;

  resetBasicOperatorState(&pInfo->binfo);
  cleanupResultInfo(pInfo->pOperator->pTaskInfo, &pInfo->pOperator->exprSupp, &pInfo->groupResInfo, &pInfo->aggSup,
                    pInfo->cleanGroupResInfo);

  colDataDestroy(&pInfo->twAggSup.timeWindowData);
  int32_t code = initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pTaskInfo->window);
  if (code == 0) {
    code = resetAggSup(&pOper->exprSupp, &pInfo->aggSup, pTaskInfo, pPhynode->window.pFuncs, NULL,
                       sizeof(int64_t) * 2 + POINTER_BYTES, pTaskInfo->id.str, NULL,
                       &pTaskInfo->storageAPI.functionStore);
  }
  if (code == 0) {
    code = resetExprSupp(&pInfo->scalarSupp, pTaskInfo, pPhynode->window.pExprs, NULL,
                         &pTaskInfo->storageAPI.functionStore);
  }

  pInfo->cleanGroupResInfo = false;
  pInfo->winSup = (SWindowRowsSup){0};
  pInfo->winSup.prevTs = INT64_MIN;
  pInfo->reptScan = false;

  cleanupGroupResInfo(&pInfo->groupResInfo);
  return code;
}

int32_t createSessionAggOperatorInfo(SOperatorInfo* downstream, SSessionWinodwPhysiNode* pSessionNode,
                                     SExecTaskInfo* pTaskInfo, SOperatorInfo** pOptrInfo) {
  QRY_PARAM_CHECK(pOptrInfo);

  int32_t                  code = TSDB_CODE_SUCCESS;
  int32_t                  lino = 0;
  SSessionAggOperatorInfo* pInfo = taosMemoryCalloc(1, sizeof(SSessionAggOperatorInfo));
  SOperatorInfo*           pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
  if (pInfo == NULL || pOperator == NULL) {
    code = terrno;
    goto _error;
  }
  initOperatorCostInfo(pOperator);

  pOperator->pPhyNode = pSessionNode;
  pOperator->exprSupp.hasWindowOrGroup = true;
  pOperator->exprSupp.hasWindow = true;

  size_t keyBufSize = sizeof(int64_t) + sizeof(int64_t) + POINTER_BYTES;
  initResultSizeInfo(&pOperator->resultInfo, 4096);

  SSDataBlock* pResBlock = createDataBlockFromDescNode(pSessionNode->window.node.pOutputDataBlockDesc);
  QUERY_CHECK_NULL(pResBlock, code, lino, _error, terrno);
  initBasicInfo(&pInfo->binfo, pResBlock);

  int32_t    numOfCols = 0;
  SExprInfo* pExprInfo = NULL;
  code = createExprInfo(pSessionNode->window.pFuncs, NULL, &pExprInfo, &numOfCols);
  QUERY_CHECK_CODE(code, lino, _error);

  code = initAggSup(&pOperator->exprSupp, &pInfo->aggSup, pExprInfo, numOfCols, keyBufSize, pTaskInfo->id.str,
                    NULL, &pTaskInfo->storageAPI.functionStore);
  QUERY_CHECK_CODE(code, lino, _error);

  pInfo->gap = pSessionNode->gap;

  initResultRowInfo(&pInfo->binfo.resultRowInfo);
  code = initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pTaskInfo->window);
  QUERY_CHECK_CODE(code, lino, _error);

  pInfo->tsSlotId = ((SColumnNode*)pSessionNode->window.pTspk)->slotId;
  pInfo->binfo.pRes = pResBlock;
  pInfo->winSup.prevTs = INT64_MIN;
  pInfo->reptScan = false;
  pInfo->binfo.inputTsOrder = pSessionNode->window.node.inputTsOrder;
  pInfo->binfo.outputTsOrder = pSessionNode->window.node.outputTsOrder;

  if (pSessionNode->window.pExprs != NULL) {
    int32_t    numOfScalar = 0;
    SExprInfo* pScalarExprInfo = NULL;
    code = createExprInfo(pSessionNode->window.pExprs, NULL, &pScalarExprInfo, &numOfScalar);
    QUERY_CHECK_CODE(code, lino, _error);

    code = initExprSupp(&pInfo->scalarSupp, pScalarExprInfo, numOfScalar, &pTaskInfo->storageAPI.functionStore);
    QUERY_CHECK_CODE(code, lino, _error);
  }

  code = filterInitFromNode((SNode*)pSessionNode->window.node.pConditions, &pOperator->exprSupp.pFilterInfo, 0,
                            pTaskInfo->pStreamRuntimeInfo);
  QUERY_CHECK_CODE(code, lino, _error);

  pInfo->pOperator = pOperator;
  pInfo->cleanGroupResInfo = false;
  setOperatorInfo(pOperator, "SessionWindowAggOperator", QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION, true, OP_NOT_OPENED,
                  pInfo, pTaskInfo);
  pOperator->fpSet = createOperatorFpSet(optrDummyOpenFn, doSessionWindowAggNext, NULL, destroySWindowOperatorInfo,
                                         optrDefaultBufFn, NULL, optrDefaultGetNextExtFn, NULL);
  pOperator->pTaskInfo = pTaskInfo;
  setOperatorResetStateFn(pOperator, resetSessionAggOperState);

  code = appendDownstream(pOperator, &downstream, 1);
  QUERY_CHECK_CODE(code, lino, _error);

  *pOptrInfo = pOperator;
  return TSDB_CODE_SUCCESS;

_error:
  if (pInfo != NULL) destroySWindowOperatorInfo(pInfo);
  destroyOperatorAndDownstreams(pOperator, &downstream, 1);
  pTaskInfo->code = code;
  return code;
}

void destroyMAIOperatorInfo(void* param) {
  SMergeAlignedIntervalAggOperatorInfo* miaInfo = (SMergeAlignedIntervalAggOperatorInfo*)param;
  destroyIntervalOperatorInfo(miaInfo->intervalAggOperatorInfo);
  taosMemoryFreeClear(param);
}

static SResultRow* doSetSingleOutputTupleBuf(SResultRowInfo* pResultRowInfo, SAggSupporter* pSup) {
  SResultRow* pResult = getNewResultRow(pSup->pResultBuf, &pSup->currentPageId, pSup->resultRowSize);
  if (NULL == pResult) {
    return pResult;
  }
  pResultRowInfo->cur = (SResultRowPosition){.pageId = pResult->pageId, .offset = pResult->offset};
  return pResult;
}

static int32_t setSingleOutputTupleBuf(SResultRowInfo* pResultRowInfo, STimeWindow* win, SResultRow** pResult,
                                       SExprSupp* pExprSup, SAggSupporter* pAggSup) {
  if (*pResult == NULL) {
    *pResult = doSetSingleOutputTupleBuf(pResultRowInfo, pAggSup);
    if (*pResult == NULL) {
      return terrno;
    }
  }

  // set time window for current result
  (*pResult)->win = (*win);
  return setResultRowInitCtx((*pResult), pExprSup->pCtx, pExprSup->numOfExprs, pExprSup->rowEntryInfoOffset);
}

static void doMergeAlignedIntervalAggImpl(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResultRowInfo,
                                          SSDataBlock* pBlock, SSDataBlock* pResultBlock) {
  SMergeAlignedIntervalAggOperatorInfo* miaInfo = pOperatorInfo->info;
  SIntervalAggOperatorInfo*             iaInfo = miaInfo->intervalAggOperatorInfo;

  SExecTaskInfo* pTaskInfo = pOperatorInfo->pTaskInfo;
  SExprSupp*     pSup = &pOperatorInfo->exprSupp;
  SInterval*     pInterval = &iaInfo->interval;

  int32_t  startPos = 0;
  int64_t* tsCols = extractTsCol(pBlock, iaInfo, pTaskInfo);

  TSKEY ts = getStartTsKey(&pBlock->info.window, tsCols);

  // there is an result exists
  if (miaInfo->curTs != INT64_MIN) {
    if (ts != miaInfo->curTs) {
      finalizeResultRows(iaInfo->aggSup.pResultBuf, &pResultRowInfo->cur, pSup, pResultBlock, pTaskInfo);
      resetResultRow(miaInfo->pResultRow, iaInfo->aggSup.resultRowSize - sizeof(SResultRow));
      miaInfo->curTs = ts;
    }
  } else {
    miaInfo->curTs = ts;
  }

  STimeWindow win = {0};
  win.skey = miaInfo->curTs;
  win.ekey = taosTimeAdd(win.skey, pInterval->interval, pInterval->intervalUnit, pInterval->precision, NULL) - 1;

  int32_t ret = setSingleOutputTupleBuf(pResultRowInfo, &win, &miaInfo->pResultRow, pSup, &iaInfo->aggSup);
  if (ret != TSDB_CODE_SUCCESS || miaInfo->pResultRow == NULL) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }

  int32_t currPos = startPos;

  STimeWindow currWin = win;
  while (++currPos < pBlock->info.rows) {
    if (tsCols[currPos] == miaInfo->curTs) {
      continue;
    }

    updateTimeWindowInfo(&iaInfo->twAggSup.timeWindowData, &currWin, 1);
    ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &iaInfo->twAggSup.timeWindowData, startPos,
                                          currPos - startPos, pBlock->info.rows, pSup->numOfExprs);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    finalizeResultRows(iaInfo->aggSup.pResultBuf, &pResultRowInfo->cur, pSup, pResultBlock, pTaskInfo);
    resetResultRow(miaInfo->pResultRow, iaInfo->aggSup.resultRowSize - sizeof(SResultRow));
    miaInfo->curTs = tsCols[currPos];

    currWin.skey = miaInfo->curTs;
    currWin.ekey =
        taosTimeAdd(currWin.skey, pInterval->interval, pInterval->intervalUnit, pInterval->precision, NULL) - 1;

    startPos = currPos;
    ret = setSingleOutputTupleBuf(pResultRowInfo, &win, &miaInfo->pResultRow, pSup, &iaInfo->aggSup);
    if (ret != TSDB_CODE_SUCCESS || miaInfo->pResultRow == NULL) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    miaInfo->curTs = currWin.skey;
  }

  updateTimeWindowInfo(&iaInfo->twAggSup.timeWindowData, &currWin, 1);
  ret = applyAggFunctionOnPartialTuples(pTaskInfo, pSup->pCtx, &iaInfo->twAggSup.timeWindowData, startPos,
                                        currPos - startPos, pBlock->info.rows, pSup->numOfExprs);
  if (ret != TSDB_CODE_SUCCESS) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }
}

static void cleanupAfterGroupResultGen(SMergeAlignedIntervalAggOperatorInfo* pMiaInfo, SSDataBlock* pRes) {
  pRes->info.id.groupId = pMiaInfo->groupId;
  pMiaInfo->curTs = INT64_MIN;
  pMiaInfo->groupId = 0;
}

static void doMergeAlignedIntervalAgg(SOperatorInfo* pOperator) {
  SExecTaskInfo*                        pTaskInfo = pOperator->pTaskInfo;
  int32_t                               code = TSDB_CODE_SUCCESS;
  int32_t                               lino = 0;
  SMergeAlignedIntervalAggOperatorInfo* pMiaInfo = pOperator->info;
  SIntervalAggOperatorInfo*             pIaInfo = pMiaInfo->intervalAggOperatorInfo;

  SExprSupp*      pSup = &pOperator->exprSupp;
  SSDataBlock*    pRes = pIaInfo->binfo.pRes;
  SResultRowInfo* pResultRowInfo = &pIaInfo->binfo.resultRowInfo;
  SOperatorInfo*  downstream = pOperator->pDownstream[0];

  while (1) {
    SSDataBlock* pBlock = NULL;
    if (pMiaInfo->prefetchedBlock == NULL) {
      pBlock = getNextBlockFromDownstreamRemainDetach(pOperator, 0);
    } else {
      pBlock = pMiaInfo->prefetchedBlock;
      pMiaInfo->prefetchedBlock = NULL;

      pMiaInfo->groupId = pBlock->info.id.groupId;
    }

    // no data exists, all query processing is done
    if (pBlock == NULL) {
      // close last unclosed time window
      if (pMiaInfo->curTs != INT64_MIN) {
        finalizeResultRows(pIaInfo->aggSup.pResultBuf, &pResultRowInfo->cur, pSup, pRes, pTaskInfo);
        resetResultRow(pMiaInfo->pResultRow, pIaInfo->aggSup.resultRowSize - sizeof(SResultRow));
        cleanupAfterGroupResultGen(pMiaInfo, pRes);
        code = doFilter(pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
        QUERY_CHECK_CODE(code, lino, _end);
      }

      setOperatorCompleted(pOperator);
      break;
    }

    if (pMiaInfo->groupId == 0) {
      if (pMiaInfo->groupId != pBlock->info.id.groupId) {
        pMiaInfo->groupId = pBlock->info.id.groupId;
        pRes->info.id.groupId = pMiaInfo->groupId;
      }
    } else {
      if (pMiaInfo->groupId != pBlock->info.id.groupId) {
        // if there are unclosed time window, close it firstly.
        if (pMiaInfo->curTs == INT64_MIN) {
          pTaskInfo->code = TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
          T_LONG_JMP(pTaskInfo->env, terrno);
        }
        finalizeResultRows(pIaInfo->aggSup.pResultBuf, &pResultRowInfo->cur, pSup, pRes, pTaskInfo);
        resetResultRow(pMiaInfo->pResultRow, pIaInfo->aggSup.resultRowSize - sizeof(SResultRow));

        pMiaInfo->prefetchedBlock = pBlock;
        cleanupAfterGroupResultGen(pMiaInfo, pRes);
        code = doFilter(pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
        QUERY_CHECK_CODE(code, lino, _end);
        if (pRes->info.rows == 0) {
          // After filtering for last group, the result is empty, so we need to continue to process next group
          continue;
        } else {
          break;
        }
      } else {
        // continue
        pRes->info.id.groupId = pMiaInfo->groupId;
      }
    }

    pRes->info.scanFlag = pBlock->info.scanFlag;
    code = setInputDataBlock(pSup, pBlock, pIaInfo->binfo.inputTsOrder, pBlock->info.scanFlag, true);
    QUERY_CHECK_CODE(code, lino, _end);

    doMergeAlignedIntervalAggImpl(pOperator, &pIaInfo->binfo.resultRowInfo, pBlock, pRes);

    code = doFilter(pRes, pOperator->exprSupp.pFilterInfo, NULL, NULL);
    QUERY_CHECK_CODE(code, lino, _end);

    if (pRes->info.rows >= pOperator->resultInfo.capacity) {
      break;
    }
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
}

static int32_t mergeAlignedIntervalAggNext(SOperatorInfo* pOperator, SSDataBlock** ppRes) {
  SExecTaskInfo*                        pTaskInfo = pOperator->pTaskInfo;
  int32_t                               code = TSDB_CODE_SUCCESS;
  SMergeAlignedIntervalAggOperatorInfo* pMiaInfo = pOperator->info;
  SIntervalAggOperatorInfo*             iaInfo = pMiaInfo->intervalAggOperatorInfo;
  if (pOperator->status == OP_EXEC_DONE) {
    (*ppRes) = NULL;
    return code;
  }

  SSDataBlock* pRes = iaInfo->binfo.pRes;
  blockDataCleanup(pRes);

  if (iaInfo->binfo.mergeResultBlock) {
    while (1) {
      if (pOperator->status == OP_EXEC_DONE) {
        break;
      }

      if (pRes->info.rows >= pOperator->resultInfo.threshold) {
        break;
      }

      doMergeAlignedIntervalAgg(pOperator);
    }
  } else {
    doMergeAlignedIntervalAgg(pOperator);
  }

  (*ppRes) = (pRes->info.rows == 0) ? NULL : pRes;
  return code;
}

static int32_t resetMergeAlignedIntervalOperState(SOperatorInfo* pOper) {
  SMergeAlignedIntervalAggOperatorInfo* pInfo = pOper->info;
  
  uint64_t     groupId;  // current groupId
  int64_t      curTs;    // current ts
  SSDataBlock* prefetchedBlock;
  SResultRow*  pResultRow;

  pInfo->groupId = 0;
  pInfo->curTs = INT64_MIN;
  pInfo->prefetchedBlock = NULL;
  pInfo->pResultRow = NULL;

  return resetInterval(pOper, pInfo->intervalAggOperatorInfo);
}

int32_t createMergeAlignedIntervalOperatorInfo(SOperatorInfo* downstream, SMergeAlignedIntervalPhysiNode* pNode,
                                               SExecTaskInfo* pTaskInfo, SOperatorInfo** pOptrInfo) {
  QRY_PARAM_CHECK(pOptrInfo);

  int32_t                               code = TSDB_CODE_SUCCESS;
  int32_t                               lino = 0;
  SMergeAlignedIntervalAggOperatorInfo* miaInfo = taosMemoryCalloc(1, sizeof(SMergeAlignedIntervalAggOperatorInfo));
  SOperatorInfo*                        pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
  if (miaInfo == NULL || pOperator == NULL) {
    code = terrno;
    goto _error;
  }
  initOperatorCostInfo(pOperator);

  pOperator->pPhyNode = pNode;
  miaInfo->intervalAggOperatorInfo = taosMemoryCalloc(1, sizeof(SIntervalAggOperatorInfo));
  if (miaInfo->intervalAggOperatorInfo == NULL) {
    code = terrno;
    goto _error;
  }

  SInterval interval = {.interval = pNode->interval,
                        .sliding = pNode->sliding,
                        .intervalUnit = pNode->intervalUnit,
                        .slidingUnit = pNode->slidingUnit,
                        .offset = pNode->offset,
                        .precision = ((SColumnNode*)pNode->window.pTspk)->node.resType.precision,
                        .timeRange = pNode->timeRange};
  calcIntervalAutoOffset(&interval);

  SIntervalAggOperatorInfo* iaInfo = miaInfo->intervalAggOperatorInfo;
  SExprSupp*                pSup = &pOperator->exprSupp;
  pSup->hasWindowOrGroup = true;
  pSup->hasWindow = true;

  code = filterInitFromNode((SNode*)pNode->window.node.pConditions, &pOperator->exprSupp.pFilterInfo, 0,
                            pTaskInfo->pStreamRuntimeInfo);
  QUERY_CHECK_CODE(code, lino, _error);

  miaInfo->curTs = INT64_MIN;
  iaInfo->win = pTaskInfo->window;
  iaInfo->binfo.inputTsOrder = pNode->window.node.inputTsOrder;
  iaInfo->binfo.outputTsOrder = pNode->window.node.outputTsOrder;
  iaInfo->interval = interval;
  iaInfo->primaryTsIndex = ((SColumnNode*)pNode->window.pTspk)->slotId;
  iaInfo->binfo.mergeResultBlock = pNode->window.mergeDataBlock;

  size_t keyBufSize = sizeof(int64_t) + sizeof(int64_t) + POINTER_BYTES;
  initResultSizeInfo(&pOperator->resultInfo, 512);

  int32_t    num = 0;
  SExprInfo* pExprInfo = NULL;
  code = createExprInfo(pNode->window.pFuncs, NULL, &pExprInfo, &num);
  QUERY_CHECK_CODE(code, lino, _error);

  code = initAggSup(&pOperator->exprSupp, &iaInfo->aggSup, pExprInfo, num, keyBufSize, pTaskInfo->id.str,
                    NULL, &pTaskInfo->storageAPI.functionStore);
  QUERY_CHECK_CODE(code, lino, _error);

  SSDataBlock* pResBlock = createDataBlockFromDescNode(pNode->window.node.pOutputDataBlockDesc);
  QUERY_CHECK_NULL(pResBlock, code, lino, _error, terrno);
  initBasicInfo(&iaInfo->binfo, pResBlock);
  code = initExecTimeWindowInfo(&iaInfo->twAggSup.timeWindowData, &iaInfo->win);
  QUERY_CHECK_CODE(code, lino, _error);

  iaInfo->timeWindowInterpo = false;
  code = timeWindowinterpNeeded(pSup->pCtx, num, iaInfo, &iaInfo->timeWindowInterpo);
  QUERY_CHECK_CODE(code, lino, _error);
  if (iaInfo->timeWindowInterpo) {
    iaInfo->binfo.resultRowInfo.openWindow = tdListNew(sizeof(SOpenWindowInfo));
  }

  initResultRowInfo(&iaInfo->binfo.resultRowInfo);
  code = blockDataEnsureCapacity(iaInfo->binfo.pRes, pOperator->resultInfo.capacity);
  QUERY_CHECK_CODE(code, lino, _error);
  iaInfo->pOperator = pOperator;
  setOperatorInfo(pOperator, "TimeMergeAlignedIntervalAggOperator", QUERY_NODE_PHYSICAL_PLAN_MERGE_ALIGNED_INTERVAL,
                  false, OP_NOT_OPENED, miaInfo, pTaskInfo);

  pOperator->fpSet = createOperatorFpSet(optrDummyOpenFn, mergeAlignedIntervalAggNext, NULL, destroyMAIOperatorInfo,
                                         optrDefaultBufFn, NULL, optrDefaultGetNextExtFn, NULL);
  setOperatorResetStateFn(pOperator, resetMergeAlignedIntervalOperState);

  code = appendDownstream(pOperator, &downstream, 1);
  QUERY_CHECK_CODE(code, lino, _error);

  *pOptrInfo = pOperator;
  return TSDB_CODE_SUCCESS;

_error:
  if (miaInfo != NULL) destroyMAIOperatorInfo(miaInfo);
  destroyOperatorAndDownstreams(pOperator, &downstream, 1);
  pTaskInfo->code = code;
  return code;
}

//=====================================================================================================================
// merge interval operator
typedef struct SMergeIntervalAggOperatorInfo {
  SIntervalAggOperatorInfo intervalAggOperatorInfo;
  SList*                   groupIntervals;
  SListIter                groupIntervalsIter;
  bool                     hasGroupId;
  uint64_t                 groupId;
  SSDataBlock*             prefetchedBlock;
  bool                     inputBlocksFinished;
} SMergeIntervalAggOperatorInfo;

typedef struct SGroupTimeWindow {
  uint64_t    groupId;
  STimeWindow window;
} SGroupTimeWindow;

void destroyMergeIntervalOperatorInfo(void* param) {
  SMergeIntervalAggOperatorInfo* miaInfo = (SMergeIntervalAggOperatorInfo*)param;
  miaInfo->groupIntervals = tdListFree(miaInfo->groupIntervals);
  destroyIntervalOperatorInfo(&miaInfo->intervalAggOperatorInfo);

  taosMemoryFreeClear(param);
}

static int32_t outputPrevIntervalResult(SOperatorInfo* pOperatorInfo, uint64_t tableGroupId, SSDataBlock* pResultBlock,
                                        STimeWindow* newWin) {
  SMergeIntervalAggOperatorInfo* miaInfo = pOperatorInfo->info;
  SIntervalAggOperatorInfo*      iaInfo = &miaInfo->intervalAggOperatorInfo;
  bool                           ascScan = (iaInfo->binfo.inputTsOrder == TSDB_ORDER_ASC);

  SGroupTimeWindow groupTimeWindow = {.groupId = tableGroupId, .window = *newWin};
  int32_t          code = tdListAppend(miaInfo->groupIntervals, &groupTimeWindow);
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, __LINE__, tstrerror(code));
    return code;
  }

  SListIter iter = {0};
  tdListInitIter(miaInfo->groupIntervals, &iter, TD_LIST_FORWARD);
  SListNode* listNode = NULL;
  while ((listNode = tdListNext(&iter)) != NULL) {
    SGroupTimeWindow* prevGrpWin = (SGroupTimeWindow*)listNode->data;
    if (prevGrpWin->groupId != tableGroupId) {
      continue;
    }

    STimeWindow* prevWin = &prevGrpWin->window;
    if ((ascScan && newWin->skey > prevWin->ekey) || ((!ascScan) && newWin->skey < prevWin->ekey)) {
      SListNode* tmp = tdListPopNode(miaInfo->groupIntervals, listNode);
      taosMemoryFreeClear(tmp);
    }
  }

  return TSDB_CODE_SUCCESS;
}

static void doMergeIntervalAggImpl(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResultRowInfo, SSDataBlock* pBlock,
                                   int32_t scanFlag, SSDataBlock* pResultBlock) {
  SMergeIntervalAggOperatorInfo* miaInfo = pOperatorInfo->info;
  SIntervalAggOperatorInfo*      iaInfo = &miaInfo->intervalAggOperatorInfo;

  SExecTaskInfo* pTaskInfo = pOperatorInfo->pTaskInfo;
  SExprSupp*     pExprSup = &pOperatorInfo->exprSupp;

  int32_t     startPos = 0;
  int32_t     numOfOutput = pExprSup->numOfExprs;
  int64_t*    tsCols = extractTsCol(pBlock, iaInfo, pTaskInfo);
  uint64_t    tableGroupId = pBlock->info.id.groupId;
  bool        ascScan = (iaInfo->binfo.inputTsOrder == TSDB_ORDER_ASC);
  TSKEY       blockStartTs = getStartTsKey(&pBlock->info.window, tsCols);
  SResultRow* pResult = NULL;

  STimeWindow win = getActiveTimeWindow(iaInfo->aggSup.pResultBuf, pResultRowInfo, blockStartTs, &iaInfo->interval,
                                        iaInfo->binfo.inputTsOrder);

  int32_t ret =
      setTimeWindowOutputBuf(pResultRowInfo, &win, (scanFlag == MAIN_SCAN), &pResult, tableGroupId, pExprSup->pCtx,
                             numOfOutput, pExprSup->rowEntryInfoOffset, &iaInfo->aggSup, pTaskInfo);
  if (ret != TSDB_CODE_SUCCESS || pResult == NULL) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }

  TSKEY   ekey = ascScan ? win.ekey : win.skey;
  int32_t forwardRows = getNumOfRowsInTimeWindow(&pBlock->info, tsCols, startPos, ekey, binarySearchForKey, NULL,
                                                 iaInfo->binfo.inputTsOrder);
  if (forwardRows <= 0) {
    T_LONG_JMP(pTaskInfo->env, TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR);
  }

  // prev time window not interpolation yet.
  if (iaInfo->timeWindowInterpo) {
    SResultRowPosition pos = addToOpenWindowList(pResultRowInfo, pResult, tableGroupId, pTaskInfo);
    doInterpUnclosedTimeWindow(pOperatorInfo, numOfOutput, pResultRowInfo, pBlock, scanFlag, tsCols, &pos);

    // restore current time window
    ret = setTimeWindowOutputBuf(pResultRowInfo, &win, (scanFlag == MAIN_SCAN), &pResult, tableGroupId, pExprSup->pCtx,
                                 numOfOutput, pExprSup->rowEntryInfoOffset, &iaInfo->aggSup, pTaskInfo);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }

    // window start key interpolation
    ret = doWindowBorderInterpolation(iaInfo, pBlock, pResult, &win, startPos, forwardRows, pExprSup);
    if (ret != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, ret);
    }
  }

  updateTimeWindowInfo(&iaInfo->twAggSup.timeWindowData, &win, 1);
  ret = applyAggFunctionOnPartialTuples(pTaskInfo, pExprSup->pCtx, &iaInfo->twAggSup.timeWindowData, startPos,
                                        forwardRows, pBlock->info.rows, numOfOutput);
  if (ret != TSDB_CODE_SUCCESS) {
    T_LONG_JMP(pTaskInfo->env, ret);
  }
  doCloseWindow(pResultRowInfo, iaInfo, pResult);

  // output previous interval results after this interval (&win) is closed
  int32_t code = outputPrevIntervalResult(pOperatorInfo, tableGroupId, pResultBlock, &win);
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, __LINE__, tstrerror(code));
    T_LONG_JMP(pTaskInfo->env, code);
  }

  STimeWindow nextWin = win;
  while (1) {
    int32_t prevEndPos = forwardRows - 1 + startPos;
    startPos = getNextQualifiedWindow(&iaInfo->interval, &nextWin, &pBlock->info, tsCols, prevEndPos,
                                      iaInfo->binfo.inputTsOrder);
    if (startPos < 0) {
      break;
    }

    // null data, failed to allocate more memory buffer
    code =
        setTimeWindowOutputBuf(pResultRowInfo, &nextWin, (scanFlag == MAIN_SCAN), &pResult, tableGroupId,
                               pExprSup->pCtx, numOfOutput, pExprSup->rowEntryInfoOffset, &iaInfo->aggSup, pTaskInfo);
    if (code != TSDB_CODE_SUCCESS || pResult == NULL) {
      T_LONG_JMP(pTaskInfo->env, code);
    }

    ekey = ascScan ? nextWin.ekey : nextWin.skey;
    forwardRows = getNumOfRowsInTimeWindow(&pBlock->info, tsCols, startPos, ekey, binarySearchForKey, NULL,
                                           iaInfo->binfo.inputTsOrder);

    // window start(end) key interpolation
    code = doWindowBorderInterpolation(iaInfo, pBlock, pResult, &nextWin, startPos, forwardRows, pExprSup);
    if (code != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, code);
    }

    updateTimeWindowInfo(&iaInfo->twAggSup.timeWindowData, &nextWin, 1);
    code = applyAggFunctionOnPartialTuples(pTaskInfo, pExprSup->pCtx, &iaInfo->twAggSup.timeWindowData, startPos,
                                           forwardRows, pBlock->info.rows, numOfOutput);
    if (code != TSDB_CODE_SUCCESS) {
      T_LONG_JMP(pTaskInfo->env, code);
    }
    doCloseWindow(pResultRowInfo, iaInfo, pResult);

    // output previous interval results after this interval (&nextWin) is closed
    code = outputPrevIntervalResult(pOperatorInfo, tableGroupId, pResultBlock, &nextWin);
    if (code != TSDB_CODE_SUCCESS) {
      qError("%s failed at line %d since %s", __func__, __LINE__, tstrerror(code));
      T_LONG_JMP(pTaskInfo->env, code);
    }
  }

  if (iaInfo->timeWindowInterpo) {
    saveDataBlockLastRow(iaInfo->pPrevValues, pBlock, iaInfo->pInterpCols);
  }
}

static int32_t doMergeIntervalAggNext(SOperatorInfo* pOperator, SSDataBlock** ppRes) {
  int32_t        code = TSDB_CODE_SUCCESS;
  int32_t        lino = 0;
  SExecTaskInfo* pTaskInfo = pOperator->pTaskInfo;

  SMergeIntervalAggOperatorInfo* miaInfo = pOperator->info;
  SIntervalAggOperatorInfo*      iaInfo = &miaInfo->intervalAggOperatorInfo;
  SExprSupp*                     pExpSupp = &pOperator->exprSupp;

  if (pOperator->status == OP_EXEC_DONE) {
    (*ppRes) = NULL;
    return code;
  }

  SSDataBlock* pRes = iaInfo->binfo.pRes;
  blockDataCleanup(pRes);
  code = blockDataEnsureCapacity(pRes, pOperator->resultInfo.capacity);
  QUERY_CHECK_CODE(code, lino, _end);

  if (!miaInfo->inputBlocksFinished) {
    SOperatorInfo* downstream = pOperator->pDownstream[0];
    while (1) {
      SSDataBlock* pBlock = NULL;
      if (miaInfo->prefetchedBlock == NULL) {
        pBlock = getNextBlockFromDownstream(pOperator, 0);
      } else {
        pBlock = miaInfo->prefetchedBlock;
        miaInfo->groupId = pBlock->info.id.groupId;
        miaInfo->prefetchedBlock = NULL;
      }

      if (pBlock == NULL) {
        tdListInitIter(miaInfo->groupIntervals, &miaInfo->groupIntervalsIter, TD_LIST_FORWARD);
        miaInfo->inputBlocksFinished = true;
        break;
      }

      if (!miaInfo->hasGroupId) {
        miaInfo->hasGroupId = true;
        miaInfo->groupId = pBlock->info.id.groupId;
      } else if (miaInfo->groupId != pBlock->info.id.groupId) {
        miaInfo->prefetchedBlock = pBlock;
        break;
      }

      pRes->info.scanFlag = pBlock->info.scanFlag;
      code = setInputDataBlock(pExpSupp, pBlock, iaInfo->binfo.inputTsOrder, pBlock->info.scanFlag, true);
      QUERY_CHECK_CODE(code, lino, _end);

      doMergeIntervalAggImpl(pOperator, &iaInfo->binfo.resultRowInfo, pBlock, pBlock->info.scanFlag, pRes);

      if (pRes->info.rows >= pOperator->resultInfo.threshold) {
        break;
      }
    }

    pRes->info.id.groupId = miaInfo->groupId;
  }

  if (miaInfo->inputBlocksFinished) {
    SListNode* listNode = tdListNext(&miaInfo->groupIntervalsIter);

    if (listNode != NULL) {
      SGroupTimeWindow* grpWin = (SGroupTimeWindow*)(listNode->data);
      pRes->info.id.groupId = grpWin->groupId;
    }
  }

  if (pRes->info.rows == 0) {
    setOperatorCompleted(pOperator);
  }

_end:
  if (code != TSDB_CODE_SUCCESS) {
    qError("%s failed at line %d since %s", __func__, lino, tstrerror(code));
    pTaskInfo->code = code;
    T_LONG_JMP(pTaskInfo->env, code);
  }
  (*ppRes) = (pRes->info.rows == 0) ? NULL : pRes;
  return code;
}

static int32_t resetMergeIntervalOperState(SOperatorInfo* pOper) {
  SMergeIntervalAggOperatorInfo* pInfo = pOper->info;

  pInfo->hasGroupId = false;
  pInfo->groupId = 0;
  pInfo->prefetchedBlock = NULL;
  pInfo->inputBlocksFinished = false;
  tdListEmpty(pInfo->groupIntervals);
  
  SIntervalAggOperatorInfo* pIntervalInfo = &pInfo->intervalAggOperatorInfo;
  return resetInterval(pOper, pIntervalInfo);
}

int32_t createMergeIntervalOperatorInfo(SOperatorInfo* downstream, SMergeIntervalPhysiNode* pIntervalPhyNode,
                                        SExecTaskInfo* pTaskInfo, SOperatorInfo** pOptrInfo) {
  QRY_PARAM_CHECK(pOptrInfo);

  int32_t                        code = TSDB_CODE_SUCCESS;
  int32_t                        lino = 0;
  SMergeIntervalAggOperatorInfo* pMergeIntervalInfo = taosMemoryCalloc(1, sizeof(SMergeIntervalAggOperatorInfo));
  SOperatorInfo*                 pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
  if (pMergeIntervalInfo == NULL || pOperator == NULL) {
    code = terrno;
    goto _error;
  }
  initOperatorCostInfo(pOperator);

  pOperator->pPhyNode = pIntervalPhyNode;
  SInterval interval = {.interval = pIntervalPhyNode->interval,
                        .sliding = pIntervalPhyNode->sliding,
                        .intervalUnit = pIntervalPhyNode->intervalUnit,
                        .slidingUnit = pIntervalPhyNode->slidingUnit,
                        .offset = pIntervalPhyNode->offset,
                        .precision = ((SColumnNode*)pIntervalPhyNode->window.pTspk)->node.resType.precision,
                        .timeRange = pIntervalPhyNode->timeRange};
  calcIntervalAutoOffset(&interval);

  pMergeIntervalInfo->groupIntervals = tdListNew(sizeof(SGroupTimeWindow));

  SIntervalAggOperatorInfo* pIntervalInfo = &pMergeIntervalInfo->intervalAggOperatorInfo;
  pIntervalInfo->win = pTaskInfo->window;
  pIntervalInfo->binfo.inputTsOrder = pIntervalPhyNode->window.node.inputTsOrder;
  pIntervalInfo->interval = interval;
  pIntervalInfo->binfo.mergeResultBlock = pIntervalPhyNode->window.mergeDataBlock;
  pIntervalInfo->primaryTsIndex = ((SColumnNode*)pIntervalPhyNode->window.pTspk)->slotId;
  pIntervalInfo->binfo.outputTsOrder = pIntervalPhyNode->window.node.outputTsOrder;

  SExprSupp* pExprSupp = &pOperator->exprSupp;
  pExprSupp->hasWindowOrGroup = true;
  pExprSupp->hasWindow = true;

  size_t keyBufSize = sizeof(int64_t) + sizeof(int64_t) + POINTER_BYTES;
  initResultSizeInfo(&pOperator->resultInfo, 4096);

  int32_t    num = 0;
  SExprInfo* pExprInfo = NULL;
  code = createExprInfo(pIntervalPhyNode->window.pFuncs, NULL, &pExprInfo, &num);
  QUERY_CHECK_CODE(code, lino, _error);

  code = initAggSup(pExprSupp, &pIntervalInfo->aggSup, pExprInfo, num, keyBufSize, pTaskInfo->id.str,
                    NULL, &pTaskInfo->storageAPI.functionStore);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  SSDataBlock* pResBlock = createDataBlockFromDescNode(pIntervalPhyNode->window.node.pOutputDataBlockDesc);
  QUERY_CHECK_NULL(pResBlock, code, lino, _error, terrno);
  initBasicInfo(&pIntervalInfo->binfo, pResBlock);
  code = initExecTimeWindowInfo(&pIntervalInfo->twAggSup.timeWindowData, &pIntervalInfo->win);
  QUERY_CHECK_CODE(code, lino, _error);

  pIntervalInfo->timeWindowInterpo = false;
  code = timeWindowinterpNeeded(pExprSupp->pCtx, num, pIntervalInfo, &pIntervalInfo->timeWindowInterpo);
  QUERY_CHECK_CODE(code, lino, _error);
  if (pIntervalInfo->timeWindowInterpo) {
    pIntervalInfo->binfo.resultRowInfo.openWindow = tdListNew(sizeof(SOpenWindowInfo));
    if (pIntervalInfo->binfo.resultRowInfo.openWindow == NULL) {
      goto _error;
    }
  }

  pIntervalInfo->pOperator = pOperator;
  initResultRowInfo(&pIntervalInfo->binfo.resultRowInfo);
  setOperatorInfo(pOperator, "TimeMergeIntervalAggOperator", QUERY_NODE_PHYSICAL_PLAN_MERGE_INTERVAL, false,
                  OP_NOT_OPENED, pMergeIntervalInfo, pTaskInfo);
  pOperator->fpSet = createOperatorFpSet(optrDummyOpenFn, doMergeIntervalAggNext, NULL, destroyMergeIntervalOperatorInfo,
                                         optrDefaultBufFn, NULL, optrDefaultGetNextExtFn, NULL);
  setOperatorResetStateFn(pOperator, resetMergeIntervalOperState);

  code = appendDownstream(pOperator, &downstream, 1);
  if (code != TSDB_CODE_SUCCESS) {
    goto _error;
  }

  *pOptrInfo = pOperator;
  return TSDB_CODE_SUCCESS;
_error:
  if (pMergeIntervalInfo != NULL) {
    destroyMergeIntervalOperatorInfo(pMergeIntervalInfo);
  }
  destroyOperatorAndDownstreams(pOperator, &downstream, 1);
  pTaskInfo->code = code;
  return code;
}

taosdata / TDengine / #5011

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