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Re: Should the function get_variable_numdistinct consider the case when stanullfrac is 1.0? - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Should the function get_variable_numdistinct consider the case when stanullfrac is 1.0?
Date
Msg-id 685722.1603723026@sss.pgh.pa.us
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In response to Should the function get_variable_numdistinct consider the case when stanullfrac is 1.0?  (Zhenghua Lyu <zlyu@vmware.com>)
Responses Re: Should the function get_variable_numdistinct consider the case when stanullfrac is 1.0?  (Zhenghua Lyu <zlyu@vmware.com>)
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Zhenghua Lyu <zlyu@vmware.com> writes:
>    It seems the function `get_variable_numdistinct` ignore the case when stanullfrac is 1.0:

I don't like this patch at all.  What's the argument for having a special
case for this value?  When would we ever get exactly 1.0 in practice?

            regards, tom lane

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