Re: grep -f keyword data query

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От Tom Lane
Тема Re: grep -f keyword data query
Дата
Msg-id 2978.1451241536@sss.pgh.pa.us
обсуждение исходный текст
Ответ на Re: grep -f keyword data query  (Andreas Kretschmer <andreas@a-kretschmer.de>)
Ответы Re: grep -f keyword data query  (Hiroyuki Sato <hiroysato@gmail.com>)
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Andreas Kretschmer <andreas@a-kretschmer.de> writes:
>> Tom Lane <tgl@sss.pgh.pa.us> hat am 27. Dezember 2015 um 19:11 geschrieben:
>> What in the world is this @~ operator?  And what sort of index are
>> you using now, that can accept it?  Are the rowcount estimates in
>> the EXPLAIN output accurate?  (If they are, it's hardly surprising
>> that the query takes a long time.)

> in a privat mail he called an other operator: ~~. I think, the @~ is an error.

Well, ~~ isn't directly indexable by btree indexes either, so there's
still something wrong with either the EXPLAIN output or the claimed
index definitions.

            regards, tom lane


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