Re: AW: type conversion discussion
От | Peter Eisentraut |
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Тема | Re: AW: type conversion discussion |
Дата | |
Msg-id | Pine.LNX.4.21.0005190413370.349-100000@localhost.localdomain обсуждение исходный текст |
Ответ на | Re: AW: type conversion discussion (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: AW: type conversion discussion
|
Список | pgsql-hackers |
Tom Lane writes: > (The SQL guys probably did not foresee people implementing NUMERIC > with wider range than FLOAT ;-) ... but the fact that we did so > doesn't give us license to ignore that aspect of the spec ...) I think that must have been it, why else would they (implicitly) rank floats above numerics. If we submit to that notion, then I agree with the promotion tree you suggested. The problem remains that upward casting will not be guaranteed to work all the time, which is something that needs to be addressed; in potentially unpretty ways, because not every casting decision is necessarily a linear ladder-climb, it might be affected by other casting decisions going on in parallel. (The workaround here could be to convert numerics that are wider than floats to `infinity' :-) -- Peter Eisentraut Sernanders väg 10:115 peter_e@gmx.net 75262 Uppsala http://yi.org/peter-e/ Sweden
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