Bruce Momjian <bruce@momjian.us> writes:
>> If we do it, basically the response to anyone who complains about loss
>> of performance should be "fix your function to be marked stable or
>> immutable, as appropriate".

> Agreed. Are we doing this, or is it a TODO?

It's done:
http://archives.postgresql.org/pgsql...8/msg00358.php

regards, tom lane

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