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

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
GnuPG-ID 0x3FFF606C http://wwwkeys.de.pgp.net
=== Schollglas Unternehmensgruppe ===

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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
> GnuPG-ID 0x3FFF606C http://wwwkeys.de.pgp.net
> === Schollglas Unternehmensgruppe ===
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org
>

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