Hi,
I received this message, but I think it should go here.Please, reply directly to the original sender.Thanks,
[]s,
Mario O.de Menezes "Many are the plans in a man's heart, but IPEN-CNEN/SP is the Lord's
purposethat prevails"
http://curiango.ipen.br/~mario Prov. 19.21 http://www.revistalinux.com.br
---------- Forwarded message ----------
Date: Thu, 18 Nov 1999 18:41:07 +0900
From: Shanthala Rao <S.Rao@toa.toasia.co.jp>
To: mario@curiango.ipen.br
Subject: please help me on pl/pgsql triggers
My problem goes like this..........
Suppose there are 3 tables say a1,a2,a3.
I want to delete a row from a2 & a3 before
deleting the same row from a1.
I wrote a trigger for this.
The problem is the row in table a2 & a3 are
getting deleted. But the same row in a1 is not
getting deleted.
code is as follows.
create function p_delete() returns opaque as'begin
delete from a2 where a2.id = a1.id;
delete from a3 where a3.id = a1.id;
return old;
end;
'language 'plpgsql';
create trigger t1 before delete on a1
for each row execute procedure p_delete();
Here is the function which first executes the statement
delete from a1 written in JDBC
private void a1_delete() { try { long id = in.readLong(); PreparedStatement prep =
connection.prepareStatement( "DELETE FROM a1 WHERE Id=?"); prep.setDouble(1,taskid); if
(prep.executeUpdate() < 0) { throw new Exception("Error in a1 delete"); } } catch (Exception e) {
setError(e); } }
hope to receive an early reply from u. thanks, Shanthala
