Re: generating a parent/child relationship in a trigger

As long as your input is well-defined, you could certainly do something
like this in a trigger.

Instinctively, I would think that plperl might be a little more wieldy
than plpgsql for the required parsing, but I'm pretty sure a plpgsql
solution could be created. Don't have one handy, though...

-tfo

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On Apr 12, 2005, at 12:51 PM, Mark Harrison wrote:

> Suppose I'm adding row to a table, and one of the columns is
> a pathname.
>
> I would like to generate in a separate table parent/child
> relationships based on the path.
>
> For example, adding "/foo/bar/baz" and "/foo/bar/bot" would
> generate the following relationships
>
> parent      child
> ------      -----
> /foo        /foo/bar
> /foo/bar    /foo/bar/baz
> /foo/bar    /foo/bar/bot
>
> Is this a reasonable thing to do in a trigger?  Does anybody
> have a pl/sql snippet to do this?
>
> Many TIA,
> Mark
>
> --
> Mark Harrison
> Pixar Animation Studios
>
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