Luiz Angelo Daros de Luca wrote:
I have a directed graph, or better, a tree in postgresql 8.3. One
table are the nodes and another one are the connections. Given any
node, I need to get all nodes down to it(to the leafs) that have
relation with anotherTable. Also, this connection change on time, so I
have a connectionDate and a disconnectionDate for each connection
(which might be null to represent open interval). This way, I wrote a
pgsql function (I rename the tables and columns to generic names).
These are the tables and the function:
Hello Luiz,
If you could upgrade to 8.4, you could use WITH RECURSIVE - my
experience is that it is several orders of magnitude faster than
recursive functions.
http://developer.postgresql.org/pgdocs/postgres/queries-with.html
regards,
Yeb Havinga
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