Обсуждение: trigger parameters, what am I doing wrong ??

Hi guys. I'm trying to pass a parameter to trigger procedure but it's not working and I have no idea why since it looks pretty ok. Here's what I do :

CREATE OR REPLACE FUNCTION test_proc()
  RETURNS "trigger" AS
$BODY$
DECLARE
chk     boolean;
par    integer := TG_ARGV[0];

BEGIN
RAISE NOTICE 'TG_ARGV = %, TG_NARGS = %, par = %', TG_ARGV[0], TG_NARGS, par;

-- [...] some computations

RETURN NEW;
END;

$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

CREATE TRIGGER jks_test_proc_tg
  AFTER UPDATE
  ON test_table
  FOR EACH ROW
  EXECUTE PROCEDURE test_proc(42);

And here's what RAISE NOTICE looks like : NOTICE:  TG_ARGV = <NULL>, TG_NARGS = 0, par = <NULL>

What's wrong with it ?? I'm running 8.1.4

regards
mk

With some version (but I don't remember which) I had the same problem.

I solved it by assigning TG_ARGV[0] to a variable and use the variable in the RAISE NOTICE.


>>> Tom Lane <tgl@sss.pgh.pa.us> 2008-10-09 19:22 >>>
"Marcin Krawczyk" <jankes.mk@gmail.com> writes:
> And here's what RAISE NOTICE looks like : NOTICE:  TG_ARGV = <NULL>,
> TG_NARGS = 0, par = <NULL>
> What's wrong with it ?? I'm running 8.1.4

Works for me:

regression=# insert into test_table values(1);
INSERT 0 1
regression=# update test_table set f1 = 2;
NOTICE:  TG_ARGV = 42, TG_NARGS = 1, par = 42
UPDATE 1

You need to show a more complete example of what you're doing.

regards, tom lane

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