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enh(query): support count(NULL) = 0

This commit is contained in:
Ganlin Zhao 2022-05-18 16:03:59 +08:00
parent 26c618e5ad
commit a52e0027cf
1 changed files with 12 additions and 2 deletions
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14
source/libs/function/src/builtinsimpl.c
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@ -330,8 +330,18 @@ static FORCE_INLINE int32_t getNumofElem(SqlFunctionCtx* pCtx) {
int32_t countFunction(SqlFunctionCtx* pCtx) {
int32_t numOfElem = getNumofElem(pCtx);
SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
char* buf = GET_ROWCELL_INTERBUF(pResInfo);
*((int64_t*)buf) += numOfElem;
SInputColumnInfoData* pInput = &pCtx->input;
int32_t type = pInput->pData[0]->info.type;
char* buf = GET_ROWCELL_INTERBUF(pResInfo);
if (IS_NULL_TYPE(type)) {
//select count(NULL) returns 0
numOfElem = 1;
*((int64_t*)buf) = 0;
} else {
*((int64_t*)buf) += numOfElem;
}
SET_VAL(pResInfo, numOfElem, 1);
return TSDB_CODE_SUCCESS;