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From: Michael Fuhr <[email protected]>
To: Jim C. Nasby <[email protected]>
Cc: [email protected]
Subject: Re: Turning a subselect into an array
Date: Thu, 28 Oct 2004 17:21:52 -0600
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Thu, Oct 28, 2004 at 05:37:29PM -0500, Jim C. Nasby wrote:
> I'm sure this has been answered before, but the search seems to be down
> again.
> 
> How can I convert the results of a subselect into an array? IE:
> 
> CREATE TABLE a(a int, b int, c int[]);
> INSERT INTO table_a
>     SELECT a, b, (SELECT c FROM table_c WHERE table_c.parent = table_b.id)
>         FROM table_b

See the "Array Constructors" section in the PostgreSQL documentation:

http://www.postgresql.org/docs/7.4/static/sql-expressions.html#SQL-SYNTAX-ARRAY-CONSTRUCTORS

INSERT INTO table_a
  SELECT a, b, ARRAY(SELECT c FROM table_c WHERE table_c.parent = table_b.id)
  FROM table_b

-- 
Michael Fuhr
http://www.fuhr.org/~mfuhr/

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