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Welford's algorithm STD and VAR on window functions

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This commit is contained in:
Andrey Piskunov
2022-06-01 19:05:33 +03:00
parent c5fa27475d
commit 66c69c7609
6 changed files with 31809 additions and 15 deletions
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4
utils/windowfunction/wf_stats.h
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@ -40,8 +40,8 @@ class WF_stats : public WindowFunctionType
static boost::shared_ptr<WindowFunctionType> makeFunction(int, const string&, int, WindowFunctionColumn*);
protected:
long double fSum1;
long double fSum2;
long double fMean;
long double fM2sum;
uint64_t fCount;
double fStats;
};