From: | "Pavel Stehule" <pavel(dot)stehule(at)hotmail(dot)com> |
---|---|
To: | tgl(at)sss(dot)pgh(dot)pa(dot)us |
Cc: | pgsql-patches(at)postgresql(dot)org |
Subject: | Re: Table function support |
Date: | 2007-04-11 07:16:16 |
Message-ID: | BAY20-F162A01A3DE31F6F2550166F95F0@phx.gbl |
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Thread: | |
Lists: | pgsql-patches |
>I've been looking at this, and my feeling is that we should drop the
>PROARGMODE_TABLE business and just define RETURNS TABLE(x int, y int)
>as exactly equivalent to RETURNS SETOF RECORD with x and y treated as
>OUT parameters. There isn't any advantage to distinguishing the cases
>that outweighs breaking client code that looks at pg_proc.proargmodes.
>I don't believe that the SQL spec prevents us from exposing those
>parameter names to PL functions, especially since none of our PLs are
>in the standard at all.
>
Reason for PROARGMODE_TABLE was protection before name's collision, and x,
and y are table attributies (not variables) and then we are protected before
collision. It's shortcut for
create function foo() returns setof record as ...
select * from foo() as (x int, y int);
Regards
Pavel Stehule
_________________________________________________________________
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