fix bugs found in regression test.

This commit is contained in:
hjxilinx 2020-02-18 21:47:17 +08:00
parent 05e8b2ab7e
commit acc083b2b2
1 changed files with 121 additions and 95 deletions

View File

@ -74,7 +74,7 @@ static void validateTimestampForSupplementResult(SQueryRuntimeEnv *pRuntimeEn
static void getBasicCacheInfoSnapshot(SQuery *pQuery, SCacheInfo *pCacheInfo, int32_t vid);
static TSKEY getQueryPositionForCacheInvalid(SQueryRuntimeEnv *pRuntimeEnv, __block_search_fn_t searchFn);
static bool functionNeedToExecute(SQueryRuntimeEnv *pRuntimeEnv, SQLFunctionCtx *pCtx, int32_t functionId);
static void getNextTimeWindow(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow *pTimeWindow);
static void getNextTimeWindow(SQuery *pQuery, STimeWindow *pTimeWindow);
static int32_t getGroupResultId(int32_t groupIndex) {
int32_t base = 200000;
@ -1024,28 +1024,33 @@ SBlockInfo getBlockBasicInfo(SQueryRuntimeEnv *pRuntimeEnv, void *pBlock, int32_
* @return TRUE means query not completed, FALSE means query is completed
*/
static bool queryPausedInCurrentBlock(SQuery *pQuery, SBlockInfo *pBlockInfo, int32_t forwardStep) {
// current query completed
if ((pQuery->lastKey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(pQuery->lastKey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery))) {
setQueryStatus(pQuery, QUERY_COMPLETED);
return true;
}
// output buffer is full, pause current query
if (Q_STATUS_EQUAL(pQuery->over, QUERY_RESBUF_FULL)) {
// assert(pQuery->checkBufferInLoop == 1 && pQuery->over == QUERY_RESBUF_FULL && pQuery->pointsOffset == 0);
assert((QUERY_IS_ASC_QUERY(pQuery) && forwardStep + pQuery->pos <= pBlockInfo->size) ||
(!QUERY_IS_ASC_QUERY(pQuery) && pQuery->pos - forwardStep + 1 >= 0));
// current query completed
if ((pQuery->lastKey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(pQuery->lastKey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery))) {
setQueryStatus(pQuery, QUERY_COMPLETED);
}
return true;
} else { // query completed
if ((pQuery->ekey <= pBlockInfo->keyLast && QUERY_IS_ASC_QUERY(pQuery)) ||
(pQuery->ekey >= pBlockInfo->keyFirst && !QUERY_IS_ASC_QUERY(pQuery))) {
setQueryStatus(pQuery, QUERY_COMPLETED);
return true;
}
return false;
}
if (Q_STATUS_EQUAL(pQuery->over, QUERY_COMPLETED)) {
return true;
}
// query completed
if ((pQuery->ekey <= pBlockInfo->keyLast && QUERY_IS_ASC_QUERY(pQuery)) ||
(pQuery->ekey >= pBlockInfo->keyFirst && !QUERY_IS_ASC_QUERY(pQuery))) {
setQueryStatus(pQuery, QUERY_COMPLETED);
return true;
}
return false;
}
/**
@ -1242,18 +1247,17 @@ static void *getGenericDataBlock(SMeterObj *pMeterObj, SQueryRuntimeEnv *pRuntim
}
}
static SBlockInfo getBlockInfo(SQueryRuntimeEnv* pRuntimeEnv) {
SQuery *pQuery = pRuntimeEnv->pQuery;
SMeterObj* pMeterObj = pRuntimeEnv->pMeterObj;
static SBlockInfo getBlockInfo(SQueryRuntimeEnv *pRuntimeEnv) {
SQuery * pQuery = pRuntimeEnv->pQuery;
SMeterObj *pMeterObj = pRuntimeEnv->pMeterObj;
void *pBlock = getGenericDataBlock(pMeterObj, pRuntimeEnv, pQuery->slot);
assert(pBlock != NULL);
int32_t blockType = IS_DISK_DATA_BLOCK(pQuery) ? BLK_FILE_BLOCK : BLK_CACHE_BLOCK;
return getBlockBasicInfo(pRuntimeEnv, pBlock, blockType);
}
static int32_t getFileIdFromKey(int32_t vid, TSKEY key) {
SVnodeObj *pVnode = &vnodeList[vid];
int64_t delta = (int64_t)pVnode->cfg.daysPerFile * tsMsPerDay[(uint8_t)pVnode->cfg.precision];
@ -1513,6 +1517,15 @@ static STimeWindow getActiveTimeWindow(SWindowResInfo *pWindowResInfo, int64_t t
}
assert(ts >= w.skey && ts <= w.ekey && w.skey != 0);
// query border check
if (w.ekey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) {
w.ekey = pQuery->ekey;
}
if (w.skey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery)) {
w.skey = pQuery->ekey;
}
return w;
}
@ -1557,7 +1570,7 @@ static int32_t addNewWindowResultBuf(SWindowResult *pWindowRes, SQueryDiskbasedR
static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SWindowResInfo *pWindowResInfo, int32_t sid,
STimeWindow *win) {
assert(win->skey < win->ekey);
assert(win->skey <= win->ekey);
SQueryDiskbasedResultBuf *pResultBuf = pRuntimeEnv->pResultBuf;
SWindowResult *pWindowRes = doSetTimeWindowFromKey(pRuntimeEnv, pWindowResInfo, (char *)&win->skey, TSDB_KEYSIZE);
@ -1661,47 +1674,47 @@ static int32_t getNumOfRowsInTimeWindow(SQuery *pQuery, SBlockInfo *pBlockInfo,
TSKEY ekey, __block_search_fn_t searchFn, bool updateLastKey) {
assert(startPos >= 0 && startPos < pBlockInfo->size);
int32_t forwardStep = -1;
int32_t num = -1;
int32_t order = pQuery->order.order;
int32_t step = GET_FORWARD_DIRECTION_FACTOR(order);
if (QUERY_IS_ASC_QUERY(pQuery)) {
if (ekey < pBlockInfo->keyLast) {
forwardStep = getForwardStepsInBlock(pBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
if (forwardStep == 0) { // no qualified data in current block, do not update the lastKey value
num = getForwardStepsInBlock(pBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
if (num == 0) { // no qualified data in current block, do not update the lastKey value
assert(ekey < pPrimaryColumn[startPos]);
} else {
if (updateLastKey) {
pQuery->lastKey = MAX(ekey, pPrimaryColumn[startPos + (forwardStep - 1)]) + step;
pQuery->lastKey = MAX(ekey, pPrimaryColumn[startPos + (num - 1)]) + step;
}
}
} else {
forwardStep = pBlockInfo->size - startPos;
num = pBlockInfo->size - startPos;
if (updateLastKey) {
pQuery->lastKey = pBlockInfo->keyLast + step;
}
}
} else { // desc
if (ekey > pBlockInfo->keyFirst) {
forwardStep = getForwardStepsInBlock(pBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
if (forwardStep == 0) { // no qualified data in current block, do not update the lastKey value
num = getForwardStepsInBlock(pBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
if (num == 0) { // no qualified data in current block, do not update the lastKey value
assert(ekey > pPrimaryColumn[startPos]);
} else {
if (updateLastKey) {
pQuery->lastKey = MIN(ekey, pPrimaryColumn[startPos - (forwardStep - 1)]) + step;
pQuery->lastKey = MIN(ekey, pPrimaryColumn[startPos - (num - 1)]) + step;
}
}
} else {
forwardStep = startPos + 1;
num = startPos + 1;
if (updateLastKey) {
pQuery->lastKey = pBlockInfo->keyFirst + step;
}
}
}
assert(forwardStep >= 0);
return forwardStep;
assert(num >= 0);
return num;
}
static void doBlockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SWindowStatus *pStatus, STimeWindow *pWin,
@ -1723,7 +1736,7 @@ static void doBlockwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SWindowStat
}
}
static void doRowwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SWindowStatus *pStatus, STimeWindow *pWin) {
static void doRowwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SWindowStatus *pStatus, STimeWindow *pWin, int32_t offset) {
SQuery * pQuery = pRuntimeEnv->pQuery;
SQLFunctionCtx *pCtx = pRuntimeEnv->pCtx;
@ -1733,7 +1746,7 @@ static void doRowwiseApplyFunctions(SQueryRuntimeEnv *pRuntimeEnv, SWindowStatus
int32_t functionId = pQuery->pSelectExpr[k].pBase.functionId;
if (functionNeedToExecute(pRuntimeEnv, &pCtx[k], functionId)) {
aAggs[functionId].xFunction(&pCtx[k]);
aAggs[functionId].xFunctionF(&pCtx[k], offset);
}
}
}
@ -1745,14 +1758,14 @@ static int32_t getNextQualifiedWindow(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow
SQuery *pQuery = pRuntimeEnv->pQuery;
while (1) {
getNextTimeWindow(pRuntimeEnv, pNextWin);
getNextTimeWindow(pQuery, pNextWin);
if (pWindowResInfo->startTime > pNextWin->skey || (pNextWin->skey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(pNextWin->ekey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery))) {
return -1;
}
// next time window not in current block
// next time window is not in current block
if ((pNextWin->skey > pBlockInfo->keyLast && QUERY_IS_ASC_QUERY(pQuery)) ||
(pNextWin->ekey < pBlockInfo->keyFirst && !QUERY_IS_ASC_QUERY(pQuery))) {
return -1;
@ -1770,6 +1783,13 @@ static int32_t getNextQualifiedWindow(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow
continue;
}
if (pNextWin->ekey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) {
pNextWin->ekey = pQuery->ekey;
}
if (pNextWin->skey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery)) {
pNextWin->skey = pQuery->ekey;
}
return startPos;
}
}
@ -1832,7 +1852,7 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, int32_t
if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, pRuntimeEnv->pMeterObj->sid, &win) != TSDB_CODE_SUCCESS) {
return 0;
}
TSKEY ekey = QUERY_IS_ASC_QUERY(pQuery) ? win.ekey : win.skey;
forwardStep = getNumOfRowsInTimeWindow(pQuery, pBlockInfo, primaryKeyCol, pQuery->pos, ekey, searchFn, false);
@ -2029,7 +2049,7 @@ void clearFirstNTimeWindow(SQueryRuntimeEnv *pRuntimeEnv, int32_t num) {
int32_t numOfClosed = numOfClosedTimeWindow(pWindowResInfo);
assert(num >= 0 && num <= numOfClosed);
for (int32_t i = 0; i < num; ++i) {
SWindowResult *pResult = &pWindowResInfo->pResult[i];
if (pResult->status.closed) { // remove the window slot from hash table
@ -2038,34 +2058,34 @@ void clearFirstNTimeWindow(SQueryRuntimeEnv *pRuntimeEnv, int32_t num) {
break;
}
}
int32_t remain = pWindowResInfo->size - num;
// clear all the closed windows from the window list
for (int32_t k = 0; k < remain; ++k) {
copyTimeWindowResBuf(pRuntimeEnv, &pWindowResInfo->pResult[k], &pWindowResInfo->pResult[num + k]);
}
// move the unclosed window in the front of the window list
for (int32_t k = remain; k < pWindowResInfo->size; ++k) {
SWindowResult *pWindowRes = &pWindowResInfo->pResult[k];
clearTimeWindowResBuf(pRuntimeEnv, pWindowRes);
}
pWindowResInfo->size = remain;
for (int32_t k = 0; k < pWindowResInfo->size; ++k) {
SWindowResult *pResult = &pWindowResInfo->pResult[k];
int32_t *p = (int32_t *)taosGetDataFromHashTable(pWindowResInfo->hashList, (const char *)&pResult->window.skey,
TSDB_KEYSIZE);
int32_t v = (*p - remain);
// todo add the update function for hash table
taosDeleteFromHashTable(pWindowResInfo->hashList, (const char *)&pResult->window.skey, TSDB_KEYSIZE);
taosAddToHashTable(pWindowResInfo->hashList, (const char *)&pResult->window.skey, TSDB_KEYSIZE, (char *)&v,
sizeof(int32_t));
}
pWindowResInfo->curIndex = -1;
}
@ -2074,7 +2094,7 @@ void clearClosedTimeWindow(SQueryRuntimeEnv *pRuntimeEnv) {
if (pWindowResInfo == NULL || pWindowResInfo->capacity == 0 || pWindowResInfo->size == 0) {
return;
}
int32_t numOfClosed = numOfClosedTimeWindow(pWindowResInfo);
clearFirstNTimeWindow(pRuntimeEnv, numOfClosed);
}
@ -2297,35 +2317,34 @@ static int32_t rowwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, int32_t *
offset -= pCtx[0].startOffset;
SWindowStatus *pStatus = getTimeWindowResStatus(pWindowResInfo, curTimeWindow(pWindowResInfo));
doRowwiseApplyFunctions(pRuntimeEnv, pStatus, &win);
doRowwiseApplyFunctions(pRuntimeEnv, pStatus, &win, offset);
lastKey = ts;
int32_t prev = pWindowResInfo->curIndex;
STimeWindow nextWin = win;
int32_t index = pWindowResInfo->curIndex;
int32_t sid = pRuntimeEnv->pMeterObj->sid;
while (1) {
getNextTimeWindow(pRuntimeEnv, &nextWin);
getNextTimeWindow(pQuery, &nextWin);
if (pWindowResInfo->startTime > nextWin.skey || (nextWin.skey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(nextWin.skey > pQuery->skey && !QUERY_IS_ASC_QUERY(pQuery))) {
pWindowResInfo->curIndex = prev;
break;
}
if (ts >= nextWin.skey && ts <= nextWin.ekey) {
// null data, failed to allocate more memory buffer
if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, pRuntimeEnv->pMeterObj->sid, &nextWin) !=
TSDB_CODE_SUCCESS) {
pWindowResInfo->curIndex = prev;
break;
}
pStatus = getTimeWindowResStatus(pWindowResInfo, curTimeWindow(pWindowResInfo));
doRowwiseApplyFunctions(pRuntimeEnv, pStatus, &nextWin);
} else {
pWindowResInfo->curIndex = prev;
if (ts < nextWin.skey || ts > nextWin.ekey) {
break;
}
// null data, failed to allocate more memory buffer
if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, sid, &nextWin) != TSDB_CODE_SUCCESS) {
break;
}
pStatus = getTimeWindowResStatus(pWindowResInfo, curTimeWindow(pWindowResInfo));
doRowwiseApplyFunctions(pRuntimeEnv, pStatus, &nextWin, offset);
}
pWindowResInfo->curIndex = index;
} else { // other queries
// decide which group this rows belongs to according to current state value
if (groupbyStateValue) {
@ -2454,7 +2473,12 @@ static int32_t applyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SBlockInfo *
TSKEY lastKey = (QUERY_IS_ASC_QUERY(pQuery)) ? pBlockInfo->keyLast : pBlockInfo->keyFirst;
doCheckQueryCompleted(pRuntimeEnv, lastKey, pWindowResInfo);
// interval query with limit applied
if (pQuery->intervalTime > 0 && pQuery->limit.limit > 0 && pQuery->limit.limit <= numOfClosedTimeWindow(pWindowResInfo)) {
setQueryStatus(pQuery, QUERY_COMPLETED);
}
assert(*numOfRes >= 0);
// check if buffer is large enough for accommodating all qualified points
@ -4025,7 +4049,7 @@ static int32_t doSkipDataBlock(SQueryRuntimeEnv *pRuntimeEnv) {
assert(pBlock != NULL);
SBlockInfo blockInfo = getBlockInfo(pRuntimeEnv);
int32_t maxReads = (QUERY_IS_ASC_QUERY(pQuery)) ? blockInfo.size - pQuery->pos : pQuery->pos + 1;
assert(maxReads >= 0);
@ -4055,7 +4079,7 @@ void forwardQueryStartPosition(SQueryRuntimeEnv *pRuntimeEnv) {
void *pBlock = getGenericDataBlock(pMeterObj, pRuntimeEnv, pQuery->slot);
assert(pBlock != NULL);
SBlockInfo blockInfo = getBlockInfo(pRuntimeEnv);
// get the qualified data that can be skipped
@ -4093,9 +4117,9 @@ static bool forwardQueryStartPosIfNeeded(SQInfo *pQInfo, STableQuerySupportObj *
if (pQuery->intervalTime > 0) {
int16_t step = GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
__block_search_fn_t searchFn = vnodeSearchKeyFunc[pRuntimeEnv->pMeterObj->searchAlgorithm];
SWindowResInfo* pWindowResInfo = &pRuntimeEnv->windowResInfo;
TSKEY* primaryKey = (TSKEY*) pRuntimeEnv->primaryColBuffer->data;
SWindowResInfo * pWindowResInfo = &pRuntimeEnv->windowResInfo;
TSKEY * primaryKey = (TSKEY *)pRuntimeEnv->primaryColBuffer->data;
STimeWindow win = getActiveTimeWindow(pWindowResInfo, pWindowResInfo->prevSKey, pQuery);
while (pQuery->limit.offset > 0) {
@ -4110,7 +4134,7 @@ static bool forwardQueryStartPosIfNeeded(SQInfo *pQInfo, STableQuerySupportObj *
if (Q_STATUS_EQUAL(pQuery->over, QUERY_NO_DATA_TO_CHECK)) {
break;
}
// next block does not included in time range, abort query
blockInfo = getBlockInfo(pRuntimeEnv);
if ((blockInfo.keyFirst > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
@ -4118,7 +4142,7 @@ static bool forwardQueryStartPosIfNeeded(SQInfo *pQInfo, STableQuerySupportObj *
setQueryStatus(pQuery, QUERY_COMPLETED);
break;
}
// set the window that start from the next data block
win = getActiveTimeWindow(pWindowResInfo, blockInfo.keyFirst, pQuery);
} else {
@ -4127,18 +4151,18 @@ static bool forwardQueryStartPosIfNeeded(SQInfo *pQInfo, STableQuerySupportObj *
if (IS_DISK_DATA_BLOCK(pQuery)) {
getTimestampInDiskBlock(pRuntimeEnv, 0);
}
STimeWindow nextWin = win;
int32_t startPos =
int32_t startPos =
getNextQualifiedWindow(pRuntimeEnv, &nextWin, pWindowResInfo, &blockInfo, primaryKey, searchFn);
if (startPos < 0) { // failed to find the qualified time window
if (startPos < 0) { // failed to find the qualified time window
assert((nextWin.skey > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(nextWin.ekey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery)));
(nextWin.ekey < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery)));
setQueryStatus(pQuery, QUERY_COMPLETED);
break;
} else { // set the abort info
} else { // set the abort info
pQuery->pos = startPos;
pQuery->lastKey = primaryKey[startPos];
win = nextWin;
@ -4152,7 +4176,7 @@ static bool forwardQueryStartPosIfNeeded(SQInfo *pQInfo, STableQuerySupportObj *
if (Q_STATUS_EQUAL(pQuery->over, QUERY_NO_DATA_TO_CHECK)) {
break;
}
blockInfo = getBlockInfo(pRuntimeEnv);
if ((blockInfo.keyFirst > pQuery->ekey && QUERY_IS_ASC_QUERY(pQuery)) ||
(blockInfo.keyLast < pQuery->ekey && !QUERY_IS_ASC_QUERY(pQuery))) {
@ -5188,12 +5212,12 @@ static void doHandleDataBlockImpl(SQueryRuntimeEnv *pRuntimeEnv, SBlockInfo *pbl
}
}
static void getNextTimeWindow(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow *pTimeWindow) {
SQuery *pQuery = pRuntimeEnv->pQuery;
// previous time window may not be of the same size of pQuery->intervalTime
static void getNextTimeWindow(SQuery *pQuery, STimeWindow *pTimeWindow) {
int32_t factor = GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
pTimeWindow->skey += (pQuery->slidingTime * factor);
pTimeWindow->ekey += (pQuery->slidingTime * factor);
pTimeWindow->ekey = pTimeWindow->skey + (pQuery->intervalTime - 1);
}
static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
@ -5245,16 +5269,18 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
int32_t nextPos = accessPos + step;
/*
* set the next access position, nextPos only required by
* 1. interval query.
* 2. multi-output query that may cause buffer overflow.
* set the next access position, nextPos only required when the interval query and projection query
* that cause output buffer overflow. When the query is completed, no need to load the next block any more.
*/
if (nextPos >= blockInfo.size || nextPos < 0) {
moveToNextBlock(pRuntimeEnv, step, searchFn, !LOAD_DATA);
// slot/pos/fileId is updated in moveToNextBlock function
savePointPosition(&pRuntimeEnv->nextPos, pQuery->fileId, pQuery->slot, pQuery->pos);
} else {
savePointPosition(&pRuntimeEnv->nextPos, pQuery->fileId, pQuery->slot, accessPos + step);
if (!Q_STATUS_EQUAL(pQuery->over, QUERY_COMPLETED) && Q_STATUS_EQUAL(pQuery->over, QUERY_RESBUF_FULL)) {
if (nextPos >= blockInfo.size || nextPos < 0) {
moveToNextBlock(pRuntimeEnv, step, searchFn, !LOAD_DATA);
// slot/pos/fileId is updated in moveToNextBlock function
savePointPosition(&pRuntimeEnv->nextPos, pQuery->fileId, pQuery->slot, pQuery->pos);
} else {
savePointPosition(&pRuntimeEnv->nextPos, pQuery->fileId, pQuery->slot, nextPos);
}
}
break;
@ -7393,7 +7419,7 @@ static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *r
if (orderType == TSQL_SO_ASC) {
startIdx = pSupporter->subgroupIdx;
step = 1;
} else {// desc order copy all data
} else { // desc order copy all data
startIdx = totalSubset - pSupporter->subgroupIdx - 1;
step = -1;
}
@ -7424,7 +7450,7 @@ static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *r
for (int32_t j = 0; j < pQuery->numOfOutputCols; ++j) {
int32_t size = pRuntimeEnv->pCtx[j].outputBytes;
char *out = pQuery->sdata[j]->data + numOfResult * size;
char *in = getPosInResultPage(pRuntimeEnv, j, &result[i]);
memcpy(out, in + oldOffset * size, size * numOfRowsToCopy);