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[TD-2199]<fix>: fix bugs in percentile in case of no data in table.

This commit is contained in:
Haojun Liao 2020-12-04 15:12:23 +08:00
parent 7d22ca3fb9
commit f91e989fd3
1 changed files with 8 additions and 6 deletions
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14
src/client/src/tscFunctionImpl.c
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@ -2466,7 +2466,7 @@ static bool percentile_function_setup(SQLFunctionCtx *pCtx) {
static void percentile_function(SQLFunctionCtx *pCtx) {
int32_t notNullElems = 0;
SResultRowCellInfo * pResInfo = GET_RES_INFO(pCtx);
SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
SPercentileInfo *pInfo = GET_ROWCELL_INTERBUF(pResInfo);
// the first stage, only acquire the min/max value
@ -2567,12 +2567,14 @@ static void percentile_finalizer(SQLFunctionCtx *pCtx) {
double v = pCtx->param[0].nType == TSDB_DATA_TYPE_INT ? pCtx->param[0].i64Key : pCtx->param[0].dKey;
SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
tMemBucket * pMemBucket = ((SPercentileInfo *)GET_ROWCELL_INTERBUF(pResInfo))->pMemBucket;
if (pMemBucket->total > 0) { // check for null
*(double *)pCtx->aOutputBuf = getPercentile(pMemBucket, v);
} else {
SPercentileInfo* ppInfo = (SPercentileInfo *) GET_ROWCELL_INTERBUF(pResInfo);
tMemBucket * pMemBucket = ppInfo->pMemBucket;
if (pMemBucket == NULL || pMemBucket->total == 0) { // check for null
assert(ppInfo->numOfElems == 0);
setNull(pCtx->aOutputBuf, pCtx->outputType, pCtx->outputBytes);
} else {
*(double *)pCtx->aOutputBuf = getPercentile(pMemBucket, v);
}
tMemBucketDestroy(pMemBucket);