Re: UNION JOIN vs UNION SELECT

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От Tom Lane
Тема Re: UNION JOIN vs UNION SELECT
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Msg-id 21599.971668756@sss.pgh.pa.us
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Ответ на Re: UNION JOIN vs UNION SELECT  (Bruce Momjian <pgman@candle.pha.pa.us>)
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Bruce Momjian <pgman@candle.pha.pa.us> writes:
>> I think it's time to bite the bullet and put in a lookahead filter.
>> What say you?

> Hmmm.  Not real excited about that for performance reasons.  Other options?

It's been in there for a month.  I'll bet lunch you will be unable to
measure any performance cost --- one extra function call and if-test
per token lexed is just not going to show on the radar screen.
        regards, tom lane


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