From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
Cc: | Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-patches(at)postgresql(dot)org |
Subject: | Re: Numeric 508 datatype |
Date: | 2005-12-02 21:30:54 |
Message-ID: | 7352.1133559054@sss.pgh.pa.us |
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Lists: | pgsql-general pgsql-hackers pgsql-patches |
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Wow, check this out:
> test=> SELECT CAST (pow(10::numeric, 10000) + 1 AS TEXT)
> It works fine! I have all the digits, and the trailing 1.0:
> 000001.0000000000000000
> while SELECT pow(10::numeric, 10000) fails.
That's just about as wacky as can be, because numeric_text() is
implemented on top of numeric_out() ... there's no way that numeric_out
can be delivering the wrong answer if the cast produces the right text.
So somewhere between numeric_out and the delivery to the client,
something's getting confused. I think it's time you got out your
debugger and started tracing through the backend ...
regards, tom lane
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