Re: Addition to / Clarification in 9.7.1. LIKE

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: GPT <gptmailinglists(at)gmail(dot)com>
Cc: pgsql-docs(at)postgresql(dot)org
Subject: Re: Addition to / Clarification in 9.7.1. LIKE
Date: 2018-01-26 13:22:13
Message-ID: 20180126132213.GF20836@momjian.us
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On Fri, Jan 26, 2018 at 09:52:07AM +0100, GPT wrote:
> Between 1st (The LIKE expression...) and 2nd (If pattern does not...)
> paragraphs, it could be added something like:
>
> <begin>
> Caution
> Contrary to some other databases, in Postgresql only two characters
> are used in LIKE patterns: underscore (_) and percent sign (%).
> The use of any other character will lead to an error.
> <end>
>
> The error message also would be more clarified to inform user about
> the use of not supported characters.

Uh, I still don't understand what error you are talking about. Here are
some examples:

SELECT 'abc' LIKE 'a_c';
?column?
----------
t

SELECT 'abc' LIKE 'a%c';
?column?
----------
t

SELECT 'abc' LIKE 'a%*c';
?column?
----------
f

Can you show me an example?

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Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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