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fix TD-1334: select count(*) returns wrong result 

github #3334
This commit is contained in:
Bomin Zhang 2020-09-04 18:29:51 +08:00
parent e9c0e7d2f1
commit 379d574d7d
1 changed files with 52 additions and 7 deletions
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59
src/tsdb/src/tsdbRead.c
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@ -734,6 +734,10 @@ static int32_t doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* p
return TSDB_CODE_SUCCESS;
}
static int32_t copyDataFromFileBlock(STsdbQueryHandle* pQueryHandle, int32_t capacity, int32_t numOfRows, int32_t start, int32_t end);
static void moveDataToFront(STsdbQueryHandle* pQueryHandle, int32_t numOfRows, int32_t numOfCols);
static void doCheckGeneratedBlockRange(STsdbQueryHandle* pQueryHandle);
static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock, STableCheckInfo* pCheckInfo){
SQueryFilePos* cur = &pQueryHandle->cur;
SDataBlockInfo binfo = GET_FILE_DATA_BLOCK_INFO(pCheckInfo, pBlock);
@ -745,7 +749,6 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBloc
TSKEY key = (row != NULL)? dataRowKey(row):TSKEY_INITIAL_VAL;
tsdbDebug("%p key in mem:%"PRId64", %p", pQueryHandle, key, pQueryHandle->qinfo);
cur->pos = ASCENDING_TRAVERSE(pQueryHandle->order)? 0:(binfo.rows-1);
if ((ASCENDING_TRAVERSE(pQueryHandle->order) && (key != TSKEY_INITIAL_VAL && key <= binfo.window.ekey)) ||
(!ASCENDING_TRAVERSE(pQueryHandle->order) && (key != TSKEY_INITIAL_VAL && key >= binfo.window.skey))) {
@ -784,14 +787,54 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBloc
*
* Here the buffer is not enough, so only part of file block can be loaded into memory buffer
*/
assert(pQueryHandle->outputCapacity >= binfo.rows);
pQueryHandle->realNumOfRows = binfo.rows;
assert(pQueryHandle->outputCapacity >= binfo.rows);
if ((cur->pos == 0 && ASCENDING_TRAVERSE(pQueryHandle->order)) ||
(cur->pos == (binfo.rows - 1) && (!ASCENDING_TRAVERSE(pQueryHandle->order)))) {
pQueryHandle->realNumOfRows = binfo.rows;
cur->rows = binfo.rows;
cur->win = binfo.window;
cur->mixBlock = false;
cur->lastKey = ASCENDING_TRAVERSE(pQueryHandle->order)? (binfo.window.ekey + 1): (binfo.window.skey -1);
} else {
SDataCols* pCols = pQueryHandle->rhelper.pDataCols[0];
TSKEY* tsArray = pCols->cols[0].pData;
assert(pCols->cols[0].type == TSDB_DATA_TYPE_TIMESTAMP && pCols->cols[0].colId == PRIMARYKEY_TIMESTAMP_COL_INDEX &&
cur->pos >= 0 && cur->pos < pBlock->numOfRows &&
(tsArray[0] == binfo.window.skey && tsArray[binfo.rows - 1] == binfo.window.ekey));
if (ASCENDING_TRAVERSE(pQueryHandle->order)) {
cur->rows = binfo.rows - cur->pos;
cur->win.skey = tsArray[cur->pos];
cur->win.ekey = binfo.window.ekey;
cur->lastKey = binfo.window.ekey + 1;
int32_t numOfRows = copyDataFromFileBlock(pQueryHandle, pQueryHandle->outputCapacity, 0, cur->pos, binfo.rows-1);
assert(numOfRows == cur->rows);
} else {
cur->rows = cur->pos + 1;
cur->win.skey = binfo.window.skey;
cur->win.ekey = tsArray[cur->pos];
cur->lastKey = binfo.window.skey - 1;
int32_t numOfRows = copyDataFromFileBlock(pQueryHandle, pQueryHandle->outputCapacity, 0, 0, cur->pos);
assert(numOfRows == cur->rows);
int32_t numOfCols = (int32_t)(QH_GET_NUM_OF_COLS(pQueryHandle));
moveDataToFront(pQueryHandle, numOfRows, numOfCols);
doCheckGeneratedBlockRange(pQueryHandle);
}
pQueryHandle->realNumOfRows = cur->rows;
cur->mixBlock = true;
}
cur->rows = binfo.rows;
cur->win = binfo.window;
cur->mixBlock = false;
cur->blockCompleted = true;
cur->lastKey = binfo.window.ekey + (ASCENDING_TRAVERSE(pQueryHandle->order)? 1:-1);
pCheckInfo->lastKey = cur->lastKey;
}
@ -823,6 +866,7 @@ static int32_t loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBl
assert(pCheckInfo->lastKey <= pBlock->keyLast);
doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock);
} else { // the whole block is loaded in to buffer
cur->pos = ASCENDING_TRAVERSE(pQueryHandle->order)? 0:(pBlock->numOfRows-1);
code = handleDataMergeIfNeeded(pQueryHandle, pBlock, pCheckInfo);
}
} else { //desc order, query ended in current block
@ -842,6 +886,7 @@ static int32_t loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBl
assert(pCheckInfo->lastKey >= pBlock->keyFirst);
doMergeTwoLevelData(pQueryHandle, pCheckInfo, pBlock);
} else {
cur->pos = ASCENDING_TRAVERSE(pQueryHandle->order)? 0:(pBlock->numOfRows-1);
code = handleDataMergeIfNeeded(pQueryHandle, pBlock, pCheckInfo);
}
}