contrib/ltree might be of use to you.
On Nov 14, 2006, at 3:46 PM, Eric E wrote:
> We're trying to use connectby to transform a tree into an ordered
> set of rows, specifically requirements rows.
>
> We have data stored in a table with
> keyid and parent_id, as described in the examples for
>
> keyid is also the primary key of a table A, which has the field
> A.seq_number.
>
> We can successfully sort the output of connectby using seqnumber.
> connectby does return as branch the concatenation of the keyids
> from root to leaf for each branch.
>
> However, we would like to return a numbering the items based on the
> order they return, like so;
>
> 1 (first item)
> 1.1 (1 branch, 1st item)
> 1.2 (1 branch, 2nd item)
> 1.2.1 (1.2 branch, 1st item)
> 1.2.2
> 1.2.2.1
> 1.3
> 2
> 2.1
> 2.1.1
> 2.1.2
> 2.1.3
> 2.2
> 2.3
>
> etc.
> Is there an option in connectby to do this directly, or do we need
> to write another function to do this?
>
> Thanks,
>
> Eric
>
>
>
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>
--
Jim Nasby jim@nasby.net
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
