From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
---|---|
To: | Scott Ribe <scott_ribe(at)elevated-dev(dot)com>, Postgresql General <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: scope quirk in copy in function |
Date: | 2015-03-23 14:19:30 |
Message-ID: | 551020F2.9070903@aklaver.com |
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Lists: | pgsql-general |
On 03/23/2015 06:59 AM, Scott Ribe wrote:
> create or replace function archive_some_stuff() returns void as $$
> declare cutoff timestamptz;
> begin
> cutoff := now() - '1 day'::interval;
> copy (select * from log where end_when < cutoff) to ...
> ...
>
> Gives me an error that there is column named cutoff. (Other uses of cutoff in queries not inside a copy, iow the delete from commands, work.)
>
> Is there any alternative to just duplicating the now() expression inside every copy?
http://www.postgresql.org/docs/9.3/interactive/plpgsql-implementation.html#PLPGSQL-VAR-SUBST
"Variable substitution currently works only in SELECT, INSERT, UPDATE,
and DELETE commands, because the main SQL engine allows query parameters
only in these commands. To use a non-constant name or value in other
statement types (generically called utility statements), you must
construct the utility statement as a string and EXECUTE it."
>
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
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