Cascading deletions does not seem to work inside PL/PGSQL functions.

Hi folks,

This problem has been troubling me for quite sometime and
I would be very thankful for your help.

I have included the complete commented script to recreate the problem in
question.

The problem is inside a plpgsql function i do not see the records in the slave tables
getting deleted when i delete the corresponing referenced record from the master table.

But things as expected  inside a Transaction at  the PSQL prompt.


any help is very much appreciated.

regds
mallah.



-------------------- stuff in test_case.sql -----------------------
--  W A R N I N G
--- scripts will delete tables t_master and t_slave and a function t_test()
---

DROP TABLE t_master; --clean up stuff first.
DROP TABLE t_slave;


CREATE  TABLE t_master (id integer primary key);
CREATE  TABLE t_slave  (id integer references t_master
            on delete cascade             on update cascade unique                        );

INSERT  INTO t_master values (1);
INSERT  INTO t_slave values (1);

-- Demonstrate that record in salve table do get
-- deleted when the master record is deleted.

BEGIN work;
delete from t_master where id=1;
select id from t_slave where id=1;  --  <-- this selects returns no record.
ROLLBACK;

-- Same stuff tried inside a PL/PGSQL function...

DROP FUNCTION t_test();
CREATE OR REPLACE FUNCTION  t_test () RETURNS integer AS '
DECLARE rec RECORD;
BEGIN       DELETE FROM t_master where id=1;       SELECT INTO rec id from t_slave where id=1; -- <-- this selects
returnsrecord.        RAISE NOTICE ''id in slave table is %'' , rec.id ;        RETURN 1; 
END;

' LANGUAGE 'plpgsql' ;

select t_test();


--------------------------- the end -----------------------------------


--
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

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