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fix(query): avg/stddev divide 0 handling 

TD-16762
This commit is contained in:
Ganlin Zhao 2022-06-23 13:58:36 +08:00
parent 044f27bbca
commit cfad058333
1 changed files with 5 additions and 0 deletions
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5
source/libs/function/src/builtinsimpl.c
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@ -1774,6 +1774,11 @@ int32_t stddevFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
pStddevRes->result = sqrt(fabs(pStddevRes->quadraticDSum / ((double)pStddevRes->count) - avg * avg)); pStddevRes->result = sqrt(fabs(pStddevRes->quadraticDSum / ((double)pStddevRes->count) - avg * avg));
} }
// check for overflow
if (isinf(pStddevRes->result) || isnan(pStddevRes->result)) {
GET_RES_INFO(pCtx)->numOfRes = 0;
}
return functionFinalize(pCtx, pBlock); return functionFinalize(pCtx, pBlock);
} }