On Thu, Sep 3, 2009 at 3:44 AM, Allan Kamau <kamauallan@xxxxxxxxx> wrote: > Hi, > I do have a query which make use of the results of an aggregate > function (for example bit_or) several times in the output column list > of the SELECT clause, does PostgreSQL simply execute the aggregate > function only once and provide the output to the other calls to the > same aggregate function. > How about the case of non volatile functions? Do they get executed as > many times as they occur in the select clause? I don't think so...could you provide a better example? It sounds like your query is one that might benefit from use of CTE... merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
