Re: some possible parser cleaning: drop support column(table) syntax

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: some possible parser cleaning: drop support column(table) syntax
Date: 2009-10-22 15:37:28
Message-ID: 1029.1256225848@sss.pgh.pa.us
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Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> 2009/10/22 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>> It is not --- it's the recommended solution for emulating computed
>> columns. The column-as-f(x) direction maybe isn't terribly exciting,
>> but the function-as-x.col direction definitely is.

> is it documented?

Yes, see "SQL Functions on Composite Types" (34.4.2 as of CVS HEAD),
down near the end of that subsection.

regards, tom lane

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