Re: Could regexp_matches be immutable?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Rod Taylor <rod(dot)taylor(at)gmail(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Could regexp_matches be immutable?
Date: 2009-10-14 20:51:03
Message-ID: 5520.1255553463@sss.pgh.pa.us
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Rod Taylor <rod(dot)taylor(at)gmail(dot)com> writes:
> I tried making a functional index based on an expression containing
> the 2 argument regexp_matches() function. Is there a reason why this
> function is not marked immutable instead of normal?

regex_flavor affects its result.

regards, tom lane

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