From: Joe Conway <mail@joeconway.com>
To: miker@n2bb.com
Cc: pgsql-sql@postgresql.org
Subject: Re: casting to arrays
Date: Fri, 18 Jul 2003 14:34:43 -0700
Message-ID: <3F1867F3.7000109@joeconway.com> (raw)
In-Reply-To: <200307181707.48441.miker@n2bb.com>
References: <200307181707.48441.miker@n2bb.com>
Mike Rylander wrote:
> I have a rather odd table structure that I would like to simplify to be a view
> (for some definition of simplify). The current idea I have is to shovel
> values from multiple rows in one table into an array in the view. The tables
> look something like this:
>
<snip>
>
> Is anything like this possible? I know this may not be good form, but
> unfortunately (or perhaps fortunately, since it means I have a job) there are
> business reasons for this, supporting old apps and such.
>
Not possible in current releases, but it will be in 7.4 (about to start
beta). It looks like this:
create table person (id integer, name varchar);
insert into person values(1,'Bob');
insert into person values(2,'Sue');
create table stuff (person_id integer, stuff_name text);
insert into stuff values(1,'chair');
insert into stuff values(1,'couch');
insert into stuff values(1,'lamp');
insert into stuff values(2,'table');
insert into stuff values(2,'shirt');
create or replace view person_with_stuff as select p.id as id, p.name as
name, ARRAY(select s.stuff_name from stuff s where s.person_id = p.id)
as stuff from person p;
regression=# select * from person_with_stuff;
id | name | stuff
----+------+--------------------
1 | Bob | {chair,couch,lamp}
2 | Sue | {table,shirt}
(2 rows)
HTH,
Joe
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To: pgsql-sql@postgresql.org
Cc: mail@joeconway.com, miker@n2bb.com
Subject: Re: casting to arrays
In-Reply-To: <3F1867F3.7000109@joeconway.com>
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