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[td-3662] <fix>: fix invalid write caused by top/bottom query.

This commit is contained in:
Haojun Liao 2021-04-03 23:45:56 +08:00
parent 49b78ead9e
commit 272494d1c5
3 changed files with 46 additions and 2 deletions
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2
src/client/inc/tscUtil.h
View File

@ -129,6 +129,8 @@ bool tscIsPointInterpQuery(SQueryInfo* pQueryInfo);
bool tscIsTWAQuery(SQueryInfo* pQueryInfo);
bool tscIsSecondStageQuery(SQueryInfo* pQueryInfo);
bool tscGroupbyColumn(SQueryInfo* pQueryInfo);
bool tscIsTopbotQuery(SQueryInfo* pQueryInfo);
int32_t tscGetTopbotQueryParam(SQueryInfo* pQueryInfo);
bool tscNonOrderedProjectionQueryOnSTable(SQueryInfo *pQueryInfo, int32_t tableIndex);
bool tscOrderedProjectionQueryOnSTable(SQueryInfo* pQueryInfo, int32_t tableIndex);

11
src/client/src/tscLocalMerge.c
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@ -338,12 +338,19 @@ void tscCreateLocalMerger(tExtMemBuffer **pMemBuffer, int32_t numOfBuffer, tOrde
pReducer->resColModel->capacity = pReducer->nResultBufSize;
pReducer->finalModel = pFFModel;
int32_t expandFactor = 1;
if (finalmodel->rowSize > 0) {
pReducer->resColModel->capacity /= finalmodel->rowSize;
bool topBotQuery = tscIsTopbotQuery(pQueryInfo);
if (topBotQuery) {
expandFactor = tscGetTopbotQueryParam(pQueryInfo);
pReducer->resColModel->capacity /= (finalmodel->rowSize * expandFactor);
} else {
pReducer->resColModel->capacity /= finalmodel->rowSize;
}
}
assert(finalmodel->rowSize > 0 && finalmodel->rowSize <= pReducer->rowSize);
pReducer->pFinalRes = calloc(1, pReducer->rowSize * pReducer->resColModel->capacity);
pReducer->pFinalRes = calloc(1, pReducer->rowSize * pReducer->resColModel->capacity * expandFactor);
if (pReducer->pTempBuffer == NULL || pReducer->discardData == NULL || pReducer->pResultBuf == NULL ||
pReducer->pFinalRes == NULL || pReducer->prevRowOfInput == NULL) {

35
src/client/src/tscUtil.c
View File

@ -271,6 +271,41 @@ bool tscIsTWAQuery(SQueryInfo* pQueryInfo) {
return false;
}
bool tscIsTopbotQuery(SQueryInfo* pQueryInfo) {
size_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
for (int32_t i = 0; i < numOfExprs; ++i) {
SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
if (pExpr == NULL) {
continue;
}
int32_t functionId = pExpr->functionId;
if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM) {
return true;
}
}
return false;
}
int32_t tscGetTopbotQueryParam(SQueryInfo* pQueryInfo) {
size_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
for (int32_t i = 0; i < numOfExprs; ++i) {
SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
if (pExpr == NULL) {
continue;
}
int32_t functionId = pExpr->functionId;
if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM) {
return pExpr->param[0].i64;
}
}
return 0;
}
void tscClearInterpInfo(SQueryInfo* pQueryInfo) {
if (!tscIsPointInterpQuery(pQueryInfo)) {
return;