Message-ID: <01b101c58c43$08405b20$0b00a8c0@forge>
From: "Andy" <frum@ar-sd.net>
To: "daq16" <daq@ugyvitelszolgaltato.hu>
Cc: <Pgsql-sql@postgresql.org>
References: <00e001c58b93$ad30b130$0b00a8c0@forge>
	<1285936906.20050718153208@ugyvitelszolgaltato.hu>
Subject: Re: Create trigger for auto update function >>  SOLVED!!!
Date: Tue, 19 Jul 2005 12:19:57 +0300
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CREATE OR REPLACE FUNCTION u9() RETURNS TRIGGER AS'
BEGIN
    NEW.pass_md5=md5(NEW.pass);
    return NEW;
END
'language plpgsql;

CREATE TRIGGER t8
 BEFORE INSERT OR UPDATE
 ON hoy FOR EACH ROW
    EXECUTE PROCEDURE u9();

Ok. This is the solution. It works well, for inserts and updates. Took some 
time to figure it out.
(ignore the function names --- test functions)

Best regards,
Andy.

----- Original Message ----- 
From: "daq" <daq@ugyvitelszolgaltato.hu>
To: "Andrei Bintintan" <klodoma@ar-sd.net>
Cc: <Pgsql-sql@postgresql.org>
Sent: Monday, July 18, 2005 4:32 PM
Subject: Re: [SQL] Create trigger for auto update function


> Hello Andrei,
>
> Monday, July 18, 2005, 2:24:41 PM, you wrote:
>
> AB> Hi to all,
>
> AB> I have a table:
> AB> create table hoy(
> AB> id serial,
> AB> pass varchar(40),
> AB> pass_md5 varchar(40);
>
> AB> Now, I want to write a trigger function that automatically updates the 
> pass_md5 with the md5 function of the pass.
>
> AB> I tried this:
>
> AB> CREATE FUNCTION update_pass(integer) RETURNS integer AS $$
> AB>     UPDATE hoy SET pass_md5=md5(pass) WHERE id=$1;
> AB>    SELECT 1;
> AB> $$ LANGUAGE SQL;
>
> AB> and
>
> AB> CREATE TRIGGER triger_users_pass_md5
> AB>  AFTER INSERT OR UPDATE
> AB>  ON hoy
> AB>     EXECUTE PROCEDURE update_pass(integer);
>
> What will be the param of the trigger procedure?
>
> Try this way:
>
> CREATE FUNCTION update_pass() RETURNS integer AS $$
>     UPDATE hoy SET pass_md5=md5(pass) WHERE id=new.id;
>    SELECT 1;
> $$ LANGUAGE SQL;
>
> CREATE TRIGGER triger_users_pass_md5
>  AFTER INSERT OR UPDATE
>  ON hoy FOR EACH ROW
>     EXECUTE PROCEDURE update_pass;
>
>
> DAQ
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>       choose an index scan if your joining column's datatypes do not
>       match
>
>