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[TD-2563]<fix>: fix invalid write caused by top/bottom query at client side.

This commit is contained in:
Haojun Liao 2020-12-26 17:08:26 +08:00
parent ab2f4ad389
commit 04e5bb2c38
1 changed files with 5 additions and 1 deletions
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6
src/client/src/tscLocalMerge.c
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@ -93,7 +93,7 @@ static void tscInitSqlContext(SSqlCmd *pCmd, SLocalReducer *pReducer, tOrderDesc
// for top/bottom function, the output of timestamp is the first column
int32_t functionId = pExpr->functionId;
if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM) {
if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF) {
pCtx->ptsOutputBuf = pReducer->pCtx[0].aOutputBuf;
pCtx->param[2].i64Key = pQueryInfo->order.order;
pCtx->param[2].nType = TSDB_DATA_TYPE_BIGINT;
@ -1296,6 +1296,10 @@ void resetOutputBuf(SQueryInfo *pQueryInfo, SLocalReducer *pLocalReducer) {// re
for (int32_t i = 0; i < t; ++i) {
SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
pLocalReducer->pCtx[i].aOutputBuf = pLocalReducer->pResultBuf->data + pExpr->offset * pLocalReducer->resColModel->capacity;
if (pExpr->functionId == TSDB_FUNC_TOP || pExpr->functionId == TSDB_FUNC_BOTTOM || pExpr->functionId == TSDB_FUNC_DIFF) {
pLocalReducer->pCtx[i].ptsOutputBuf = pLocalReducer->pCtx[0].aOutputBuf;
}
}
memset(pLocalReducer->pResultBuf, 0, pLocalReducer->nResultBufSize + sizeof(tFilePage));