Allan Kamau 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 did not see a reply to this. Does anyone know the answer?
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Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
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