Re: numeric/decimal docs bug?
От | Tatsuo Ishii |
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Тема | Re: numeric/decimal docs bug? |
Дата | |
Msg-id | 20020312110117E.t-ishii@sra.co.jp обсуждение исходный текст |
Ответ на | Re: numeric/decimal docs bug? (Bruce Momjian <pgman@candle.pha.pa.us>) |
Ответы |
Re: numeric/decimal docs bug?
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Список | pgsql-hackers |
> Jan Wieck wrote: > > > The hard limit is certainly no more than 64K, since we store these > > > numbers in half of an atttypmod. In practice I suspect the limit may > > > be less; Jan would be more likely to remember... > > > > It is arbitrary of course. I don't recall completely, have to > > dig into the code, but there might be some side effect when > > mucking with it. > > > > The NUMERIC code increases the actual internal precision when > > doing multiply and divide, what happens a gazillion times > > when doing higher functions like trigonometry. I think there > > was some connection between the max precision and how high > > this internal precision can grow, so increasing the precision > > might affect the computational performance of such higher > > functions significantly. > > Oh, interesting, maybe we should just leave it alone. So are we going to just fix the docs? -- Tatsuo Ishii
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