From: george young <gry@ll.mit.edu>
To: pgsql-sql@postgresql.org
Subject: Re: Expressing a result set as an array (and vice versa)?
Date: Sat, 25 Mar 2006 22:11:02 -0500
Message-ID: <20060325221102.31de88d7.gry@ll.mit.edu> (raw)
In-Reply-To: <F3E0C44C-6118-41C6-AC71-2B19258F4F07@genome.stanford.edu>
References: <F3E0C44C-6118-41C6-AC71-2B19258F4F07@genome.stanford.edu>
On Thu, 23 Mar 2006 11:44:32 -0800
Don Maier <dMaier@genome.stanford.edu> threw this fish to the penguins:
> Is it possible to construct an array from an appropriate select
> expression that generates a result set of unknown cardinality?
> To focus on the simple case: Is it possible to construct a one-
> dimensional array from a select of a single column in a table with an
> unknown number of rows?
select array(select some_int_field from my_table where something);
produces an array of integers. No user defined function is required.
> Conversely, is it possible to construct a (single column) result set
> from a select expression on a one-dimensional array with an unknown
> number of elements?
Not so easy without a custom function.
> Thanks for any hints!
>
> Regards,
> Don Maier
>
>
>
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--
"Are the gods not just?" "Oh no, child.
What would become of us if they were?" (CSL)
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To: pgsql-sql@postgresql.org
Cc: gry@ll.mit.edu
Subject: Re: Expressing a result set as an array (and vice versa)?
In-Reply-To: <20060325221102.31de88d7.gry@ll.mit.edu>
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