Re: trigger function with arguments from a sql command

It works!!!! Tks a lot, your the men!!


----- Original Message -----
From: "A. Kretschmer" <andreas.kretschmer@schollglas.com>
To: <pgsql-novice@postgresql.org>
Sent: Wednesday, December 07, 2005 3:20 PM
Subject: Re: [NOVICE] trigger function with arguments from a sql command


> am  07.12.2005, um 15:09:00 -0000 mailte Luis Silva folgendes:
>> hi there, i'm having a big problem. I have this table
>>
>>
>> CREATE TABLE test {
>>
>>     id int8 NOT NULL,
>>     asname varchar(80) NOT NULL,
>>     priority int2 NOT NULL,
>>     serviceid,
>>     ...
>>
>>     CONSTRAIN PRIMARY KEY (id),
>>     CONSTRAIN FOREIGN KEY (serviceid) REFERENCES service (id) MATCH FULL
>> }
>>
>> and i need to make a trigger function that accept arguments insert in
>> a INSERT INTO. The priority value must be unique for the same
>> serviceid but it can be the same for different serviceid. how can i do
>> that, pass the arguments of a command? tks in advance
>
> 1. you can't pass arguments to a trigger
> 2. you can create a unique index on (priority,serviceid).
>
> test=# create table foobar (id int not null, prio int not null, serviceid
> int not null);
> CREATE TABLE
> test=# create unique index idx_foobar on foobar (prio, serviceid);
> CREATE INDEX
> test=# insert into foobar values (1,1,1);
> INSERT 0 1
> test=# insert into foobar values (1,1,2);
> INSERT 0 1
> test=# insert into foobar values (1,2,2);
> INSERT 0 1
> test=# insert into foobar values (1,2,2);
> ERROR:  duplicate key violates unique constraint "idx_foobar"
>
>
> HTH, Andreas
> --
> Andreas Kretschmer    (Kontakt: siehe Header)
> Heynitz:  035242/47212,      D1: 0160/7141639
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