On Sat, 4 Jun 2016 Andrew Beverley <andy@xxxxxxxxxxx> wrote: > I'm performing a query with many joins, with a WHERE condition on the > "root" table. As far as I am aware, each join is indexed, as is the > WHERE clause. To my simple mind, this is just a case of taking a set > of conditional indexed values, and then "adding on" the relevant > indexed data. Apologies, I think I've found the problem. All the joined table are meant to have only a single value for the "root" table, but there were actually several for some, which was exponentially adding many rows for all the joins. I've not tried it yet, but I suspect that once I fix that the performance will be as expected. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
