Re: Q: Tree traversal with SQL query?

Adrian von Bidder wrote:
> Hi,
>
> Is there any way to do tree traversal with only one SQL query (no
> procedure/function)?
>
> CREATE TABLE foo (
> node INTEGER,
> parent INTEGER REFERENCES foo(node)
> );
>
> Ideally the output would be a depth-first tree traversal starting at root
> (marked by parent == node, for example.)
>
> Obviously, I can do this with "normal" programming and loops, but it bugged
> me a while if its at all possible doing this in one query.

Have a look at contrib/ltree ;)

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Alban Hertroys
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