Re: ALTER TYPE 3: add facility to identify further no-work cases

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Noah Misch <noah(at)leadboat(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: ALTER TYPE 3: add facility to identify further no-work cases
Date: 2011-01-27 14:46:56
Message-ID: 21936.1296139616@sss.pgh.pa.us
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> OK. I was thinking that instead moving this into
> eval_const_expressions(), we just make the logic in
> find_coercion_pathway() call the "exemptor" function (or whatever we
> call it) right around here:

No, no, no, no. Didn't you read yesterday's discussion? parse_coerce
is entirely the wrong place for this.

regards, tom lane

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