Whit Armstrong escribió: > Ansis <ansis_no_ AT inbox.lv>13 Jan 2006 16:41:05 > An aggregate multiplication function, an analog of "sum" (the same > should be defined also for other numeric types): > > CREATE OR REPLACE FUNCTION mul2(FLOAT,FLOAT) > RETURNS FLOAT AS ' > DECLARE > a ALIAS FOR $1; > b ALIAS FOR $2;
[...] > but that example looks pretty different than the ones found in the 8.3 > manual (avg for instance): The main difference is that the 8.3 docs example piggybacks on C language functions that you must compile and install separately, whereas the comment function uses a plpgsql function and is self-contained. Other than that (and the fact that the second one is for averages not multiplication), both examples are technically identical ... -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
