Re: Cursors and recursion

On Wed, Dec 28, 2005 at 10:48:25AM -0500, Tom Lane wrote:
> Don Croata <el(dot)croata(at)gmail(dot)com> writes:
> > It's a function who has a cursor and calls itself, but the problem raises
> > after the first recursion, when PgSQL complains:
>
> > ERROR: cursor "cur" already in use
>
> > Are the cursors kept globally? or cached like TEMP TABLE?
>
> Cursor names are global within a particular session.
>
> IIRC there is a syntax for opening a cursor without specifying a name,
> in which case plpgsql will pick one that's not in use. This is probably
> what you want to use.

Or, if possible, use "FOR record_or_row IN query LOOP" instead of
an explicit cursor.

http://www.postgresql.org/docs/8.1/interactive/plpgsql-control-structures.html#PLPGSQL-RECORDS-ITERATING

--
Michael Fuhr