Skip site navigation (1) Skip section navigation (2)

Re: RangeTblEntry modifications

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alex Pilosov <alex(at)pilosoft(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: RangeTblEntry modifications
Date: 2001-07-01 04:47:41
Message-ID: 15248.993962861@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Alex Pilosov <alex(at)pilosoft(dot)com> writes:
> I think I just understood what you were saying: having tupleDesc in RTE is
> not kosher, because RTE can last longer than a given tupleDesc?

Depends where you got the tupleDesc from --- if you copy it into the
parse context then it's OK in terms of not disappearing.  However,
that doesn't mean it's still *valid*.  Consider

	begin;
	declare foo cursor for select * from bar;
	create view v1 as select * from cursor foo;
	end;

Now the cursor foo is no more, but v1 still exists ... what happens
when we try to select from v1?

			regards, tom lane

In response to

Responses

pgsql-hackers by date

Next:From: Alex PilosovDate: 2001-07-01 12:58:28
Subject: Re: RangeTblEntry modifications
Previous:From: Alex PilosovDate: 2001-07-01 00:01:54
Subject: Re: RangeTblEntry modifications

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group