Re: Expressing a result set as an array (and vice versa)?

On Thu, 23 Mar 2006 11:44:32 -0800
Don Maier <dMaier(at)genome(dot)stanford(dot)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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