Re: LIKE without wildcard different from =

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От Tom Lane
Тема Re: LIKE without wildcard different from =
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Msg-id 21547.1280941085@sss.pgh.pa.us
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Ответ на Re: LIKE without wildcard different from =  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
Ответы Re: LIKE without wildcard different from =  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
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"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> To be clear, though, the problem isn't that it didn't turn a LIKE
> with no wildcard characters into an equality test, it's that it
> would have been three orders of magnitude faster (because of an
> available index with an opclass specification) if it had treated an
> equality test as a LIKE.

Ah.  Well, the real fix for that is also in 8.4: we got rid of the
separate ~=~ operator, so a text_pattern_ops index is now usable
for plain =.

            regards, tom lane

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