Re: Alternative to "Money" ...
От | Harald Fuchs |
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Тема | Re: Alternative to "Money" ... |
Дата | |
Msg-id | pur7xct9pb.fsf@srv.protecting.net обсуждение исходный текст |
Ответ на | Re: Alternative to "Money" ... ("Matt Clark" <matt@ymogen.net>) |
Ответы |
Re: Alternative to "Money" ...
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Список | pgsql-admin |
In article <20040203160813.81708.qmail@web13808.mail.yahoo.com>, Chris Gamache <cgg007@yahoo.com> writes: > That does make more sense (cents? :) ). > View and rule still apply, tho. Better performance still? > create temporary table new_money (product text, cents int4); > create view v_new_money as select product, (cents::numeric/100)::numeric(10,2) > as dollars from new_money; > create rule v_new_money_upd as on update to v_new_money do instead update > new_money set product=new.product, cents=new.dollars * 100 where product = > old.product; > create rule v_new_money_del as on delete to v_new_money do instead delete from > new_money where product = old.product; > create rule v_new_money_ins as on insert to v_new_money do instead insert into > new_money (product, cents) values (new.product, new.dollars * 100); > insert into new_money (product, cents) values ('Flowbee','1995'); > insert into new_money (product, cents) values ('Country Hits','995'); > insert into v_new_money (product, dollars) values ('ThighMaster','39.95'); > update v_new_money set dollars = '14.95' where product='Flowbee'; From where would you get this '14.95'? From your application? If yes, what type is it? A string or a float? A string would be inefficient (like SQLs NUMERIC), a float would not be exact (like SQLs FLOAT).
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