Re: Multiple Rules :: Postgres Is confused !! - Mailing list pgsql-general

From Najib Abi Fadel
Subject Re: Multiple Rules :: Postgres Is confused !!
Date
Msg-id 008e01c4a619$1ba296d0$f664a8c0@najib
Whole thread Raw
In response to Multiple Rules :: Postgres Is confused !!  ("Najib Abi Fadel" <nabifadel@usj.edu.lb>)
Responses Re: Multiple Rules :: Postgres Is confused !!
List pgsql-general
Details:

I have a table "transactions_sco" and a view "transactions_sco_v" defined as
:
create view transactions_sco_v as select * from transactions_sco;

I have the following Rules:

CREATE RULE transactions_sco_up1 AS ON
 UPDATE TO transactions_sco_v DO INSTEAD UPDATE transactions_sco SET traiter
= new.traiter WHERE
 (((((transactions_sco.cursus_id = old.cursus_id) AND
(transactions_sco.vers_id = old.vers_id))
AND (transactions_sco.traiter = old.traiter)) AND
(transactions_sco.code_type_academic = old.cod
e_type_academic)) AND (transactions_sco.cod_etu = old.cod_etu));

CREATE RULE transactions_sco_up2 AS ON
 UPDATE TO transactions_sco_v DO INSTEAD UPDATE transactions_sco SET traiter
= new.traiter WHERE
 ((((transactions_sco.cursus_id = old.cursus_id) AND
(transactions_sco.vers_id = old.vers_id)) A
ND (transactions_sco.traiter = old.traiter)) AND
(transactions_sco.code_type_academic = old.code
_type_academic));


CREATE RULE transactions_sco_up8 AS ON
 UPDATE TO transactions_sco_v DO INSTEAD UPDATE transactions_sco SET traiter
= new.traiter WHERE
 (transactions_sco.id = old.id);


Now look what is happening:

SELECT count(1) from transactions_sco where traiter='f';
count
-------
 17591

update transactions_sco_v set traiter='t' where id = 53597;
UPDATE 1

SELECT count(1) from transactions_sco where traiter='f';
 count
-------
 17589

AS YOU CAN SEE TWO ROWS WHERE UPDATED INSTEAD OF ONE !!
THE COMMON THINGS BETWEEN THE TWO ROWS  IS THAT THE FIELDS: cod_etu,
cursus_id,vers_id,code_type_academic  are the same

IF I REMOVE the rules transactions_sco_up1  and transactions_sco_up2  the
update works fine ...

Thx for any help.







pgsql-general by date:

Previous
From: "Gregory S. Williamson"
Date:
Subject: Setting search paths inside a function (plpgsql)
Next
From: Richard Huxton
Date:
Subject: Re: Multiple Rules :: Postgres Is confused !!