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Fix another 0 count error in dropValue

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mariadb-AndreyPiskunov
2022-09-09 21:34:20 +03:00
committed by Leonid Fedorov
parent e7cab8445c
commit 680633a350
9 changed files with 160 additions and 87 deletions
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37
utils/regr/regr_r2.cpp
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@ -218,23 +218,32 @@ mcsv1_UDAF::ReturnCode regr_r2::dropValue(mcsv1Context* context, ColumnDatum* va
long double cxyPrev = data->cxy;
--data->cnt;
uint64_t cnt = data->cnt;
if (cnt == 0)
{
data->avgx = 0;
data->avgy = 0;
data->varx = 0;
data->vary = 0;
data->cxy = 0;
}
else
{
long double dx = valx - avgxPrev;
long double dy = valy - avgyPrev;
long double dx = valx - avgxPrev;
long double dy = valy - avgyPrev;
avgyPrev -= dy / cnt;
avgxPrev -= dx / cnt;
avgyPrev -= dy / cnt;
avgxPrev -= dx / cnt;
varxPrev -= dx * (valx - avgxPrev);
varyPrev -= dy * (valy - avgyPrev);
varxPrev -= dx * (valx - avgxPrev);
varyPrev -= dy * (valy - avgyPrev);
cxyPrev -= dx * (valy - avgyPrev);
data->avgx = avgxPrev;
data->avgy = avgyPrev;
data->varx = varxPrev;
data->vary = varyPrev;
data->cxy = cxyPrev;
cxyPrev -= dx * (valy - avgyPrev);
data->avgx = avgxPrev;
data->avgy = avgyPrev;
data->varx = varxPrev;
data->vary = varyPrev;
data->cxy = cxyPrev;
}
return mcsv1_UDAF::SUCCESS;
}