Re: Insert rule and seqences

Bo Lorentsen wrote:
>
> CREATE SEQUENCE entity_seq;
>
> CREATE TABLE A (
> id INTEGER DEFAULT nextval( 'entity_seq' ),
> name TEXT
> );
>
> CREATE TABLE B (
> name TEXT,
> a_ref INTEGER NOT NULL -- REFERENCES A( id )
> );
>
> CREATE RULE insert_on_a
> AS ON INSERT
> TO A (
> INSERT INTO B name, a_ref VALUES( name, currval( 'entity_seq' ));
> );
>
> Is this all wrong, or is the another way to get the new 'id' value from
> the A table ?

I wouldn't use a RULE but a TRIGGER. Something like the one below
(please check syntax ;) ).

CREATE TRIGGER tr_insert_on_a AFTER INSERT OR UPDATE ON A
FOR EACH ROW EXECUTE PROCEDURE fn_insert_on_a();

CREATE function fn_insert_on_a() RETURNS OPAQUE AS '
BEGIN
INSERT INTO B name, a_ref VALUES(NEW.name, NEW.id);
END;
' LANGUAGE 'plpgsql';

Jochem