On Thu, Sep 3, 2009 at 12:48 AM, Keith Cascio<ke...@cs.ucla.edu> wrote:
> Pavel,
>
> On Thu, 3 Sep 2009, Pavel Stehule wrote:
>
>> it's not bug - PostgreSQL doesn't support parameter placeholder on this
>> position. Use dynamic query instead - plpgsql statement EXECUTE.
>
> Thank you for your reply.  I appreciate your suggestion, but it still seems 
> like
> a bug to me.  Please comment on the fact that the following code succeeds:
>
> create function reproduce() returns table(foo integer) language plpgsql as
> 'begin return query select 1 bar; end;';
>
> Output in psql is:
> CREATE FUNCTION
>
> Why should it succeed with "bar" but not with "foo"?

This is a very common gotcha in plpgsql.  I always prefix function
arguments and and locals with _;

merlin

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