Обсуждение: OID of current function

Is there an easy way to get the OID of the currently running function?
(IE: the function you're in when you execute the code to see what
function you're in, if that makes any sense).
--
Jim C. Nasby, Database Consultant               decibel@decibel.org
Give your computer some brain candy! www.distributed.net Team #1828

Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"

Jim C. Nasby wrote:
> Is there an easy way to get the OID of the currently running function?
> (IE: the function you're in when you execute the code to see what
> function you're in, if that makes any sense).

In what language? In C you can use:

Datum your_function(PG_FUNCTION_ARGS)
{
    Oid funcOid = fcinfo->flinfo->fn_oid;
    ...
}

Regards,
Thomas Hallgren

On Wed, Jan 12, 2005 at 04:08:28PM +0100, Thomas Hallgren wrote:
> Jim C. Nasby wrote:
> >Is there an easy way to get the OID of the currently running function?
> >(IE: the function you're in when you execute the code to see what
> >function you're in, if that makes any sense).
>
> In what language? In C you can use:
>
> Datum your_function(PG_FUNCTION_ARGS)
> {
>     Oid funcOid = fcinfo->flinfo->fn_oid;
>     ...
> }

This would be in plpgsql.

Some other info:

What I'm trying to do is use contrib/userlock to serialize access to a
function. The only effective way to come up with a unique lock number
that I've been able to think of is to use the OID of the function
itself.

What I find somewhat interesting is every other database I've used that
exposes some kind of 'object ID' has a set of functions to map between
an object name and it's ID, and vice-versa. It seems like this is
something that would be good for PostgreSQL to have.
--
Jim C. Nasby, Database Consultant               decibel@decibel.org
Give your computer some brain candy! www.distributed.net Team #1828

Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"

"Jim C. Nasby" <decibel@decibel.org> writes:
> What I find somewhat interesting is every other database I've used that
> exposes some kind of 'object ID' has a set of functions to map between
> an object name and it's ID, and vice-versa.

regression=# create function myfunc(int) returns int as 'select $1' language sql;
CREATE FUNCTION

regression=# SELECT 'myfunc(int)'::regprocedure::oid;
  oid
--------
 431373
(1 row)

regression=# select 431373::regprocedure;
  regprocedure
-----------------
 myfunc(integer)
(1 row)

            regards, tom lane