| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Jim C(dot) Nasby" <decibel(at)decibel(dot)org> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Issues with factorial operator |
| Date: | 2007-06-09 14:22:04 |
| Message-ID: | 16015.1181398924@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Jim C. Nasby" <decibel(at)decibel(dot)org> writes:
> So at the very least the documentation is confusing:
> The type numeric can store numbers with up to 1000 digits of precision
> and perform calculations exactly.
This documentation is outright wrong. The grain of truth behind the
statement is that the parser won't let you declare numeric(N) columns
with N > 1000. But unconstrained numeric can be a lot larger. The
hard limit of the format seems to be 10^128K.
I agree that a CHECK_FOR_INTERRUPTS in numeric_fac wouldn't be a bad
idea, and we can reject arguments that are clearly going to overflow.
regards, tom lane
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