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Re: [HACKERS] selectivity calculation for or_clause is wrong ? - Mailing list pgsql-hackers

From Tom Lane
Subject Re: [HACKERS] selectivity calculation for or_clause is wrong ?
Date
Msg-id 29708.932484718@sss.pgh.pa.us
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In response to selectivity calculation for or_clause is wrong ?  ("Hiroshi Inoue" <Inoue@tpf.co.jp>)
Responses RE: [HACKERS] selectivity calculation for or_clause is wrong ?
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"Hiroshi Inoue" <Inoue@tpf.co.jp> writes:
> Why is valid_or_clause(clausenode) necessary ?

Looks like a waste of cycles to me too.

If the subclauses of an OR could get rearranged during optimization
then this might be a necessary check, but AFAIK they don't.
        regards, tom lane

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