Re: text_pattern_ops index not being used for prefix query

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От Alexander Staubo
Тема Re: text_pattern_ops index not being used for prefix query
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Msg-id 2172C7ED-714D-4BA5-A584-3F04E7498E90@purefiction.net
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Ответ на Re: text_pattern_ops index not being used for prefix query  (Maxim Boguk <maxim.boguk@gmail.com>)
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On 20 Oct 2016, at 23:37, Maxim Boguk <maxim.boguk@gmail.com> wrote:
> ​Underscore in like pattern have a special meaning of "any symbol".
> From documentation on the https://www.postgresql.org/docs/9.4/static/functions-matching.html :
> "An underscore (_) in pattern stands for (matches) any single character;"
> This could be useful as well: "To match a literal underscore or percent sign without matching other characters, the
respectivecharacter in pattern must be preceded by the escape character.” 

Oops, how embarrassing. For some reason I thought PostgreSQL only had "%". Thanks for clearing that up.



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