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Remade dropValue

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This commit is contained in:
mariadb-AndreyPiskunov
2022-09-02 14:14:33 +03:00
committed by Leonid Fedorov
parent 6ffa0000da
commit 14b976991b
2 changed files with 15 additions and 8 deletions
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21
utils/regr/regr_sxy.cpp
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@ -147,20 +147,27 @@ mcsv1_UDAF::ReturnCode regr_sxy::evaluate(mcsv1Context* context, static_any::any
}
return mcsv1_UDAF::SUCCESS;
}
/*
mcsv1_UDAF::ReturnCode regr_sxy::dropValue(mcsv1Context* context, ColumnDatum* valsDropped)
{
double valy = toDouble(valsDropped[0]);
double valx = toDouble(valsDropped[1]);
struct regr_sxy_data* data = (struct regr_sxy_data*)context->getUserData()->data;
data->avgy -= valy;
data->avgx -= valx;
data->cxy -= valx * valy;
long double avgyPrev = data->avgy;
long double avgxPrev = data->avgx;
long double cxyPrev = data->cxy;
--data->cnt;
uint64_t cnt = data->cnt;
long double dx = valx - avgxPrev;
avgyPrev -= (valy - avgyPrev) / cnt;
avgxPrev -= dx / cnt;
cxyPrev -= dx * (valy - avgyPrev);
data->avgx = avgxPrev;
data->avgy = avgyPrev;
data->cxy = cxyPrev;
return mcsv1_UDAF::SUCCESS;
}
*/