Re: Recursive select

On Fri, Oct 26, 2001 at 02:57:18PM +0800, Jason Kwok wrote:
> I have a table :
>
> MyID parentID
> ================
> 5 6
> 6 7
> 3 13
> 7 3
>
> Is there any simple select statement that can get all rows with MyID = 5 and
> all its parents?

Dan Wickstrom, of the OpenACS.org team, implemented a bunch of PL/pgSQL
functions to do what you're after. It simulates the CONNECT BY behaviour
in Oracle.

OpenACS 4 is GPL'd, so you can look at the source. I need to extract the
relevant sections and post them in the PostgreSQL Cookbook (actually, I
think there are a couple tree functions in there -
http://www.brasileiro.net/postgres/)

-Roberto
--
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Roberto Mello - Computer Science, USU - http://www.brasileiro.net
http://www.sdl.usu.edu - Space Dynamics Lab, Developer
Always forgive your enemies. They hate that!