Could regexp_matches be immutable?

From: Rod Taylor <rod(dot)taylor(at)gmail(dot)com>
To: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Could regexp_matches be immutable?
Date: 2009-10-14 20:21:41
Message-ID: 751261b20910141321l7268ea73pe4f406a0ace3b4b2@mail.gmail.com
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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?

regards,

Rod Taylor

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