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MCOL-1983 Use long double for internal calculations of regr_*** functions.

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David Hall
2019-01-21 14:39:51 -06:00
parent eb75d3cd7e
commit 16a6a0a27c
11 changed files with 100 additions and 100 deletions
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22
utils/regr/regr_intercept.cpp
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@@ -39,10 +39,10 @@ static Add_regr_intercept_ToUDAFMap addToMap;
struct regr_intercept_data
{
uint64_t cnt;
double sumx;
double sumx2; // sum of (x squared)
double sumy;
double sumxy; // sum of (x*y)
long double sumx;
long double sumx2; // sum of (x squared)
long double sumy;
long double sumxy; // sum of x * y
};
@@ -148,15 +148,15 @@ mcsv1_UDAF::ReturnCode regr_intercept::evaluate(mcsv1Context* context, static_an
double N = data->cnt;
if (N > 1)
{
double sumx = data->sumx;
double sumy = data->sumy;
double sumx2 = data->sumx2;
double sumxy = data->sumxy;
double numerator = sumy * sumx2 - sumx * sumxy;
double var_pop = (N * sumx2) - (sumx * sumx);
long double sumx = data->sumx;
long double sumy = data->sumy;
long double sumx2 = data->sumx2;
long double sumxy = data->sumxy;
long double numerator = sumy * sumx2 - sumx * sumxy;
long double var_pop = (N * sumx2) - (sumx * sumx);
if (var_pop != 0)
{
valOut = numerator / var_pop;
valOut = static_cast<double>(numerator / var_pop);
}
}
return mcsv1_UDAF::SUCCESS;