| From: | Joe Nelson <joe(at)begriffs(dot)com> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: POC: rational number type (fractions) |
| Date: | 2020-02-22 02:24:23 |
| Message-ID: | 20200222022423.GH42864@begriffs.com |
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| Lists: | pgsql-hackers |
Joe Nelson wrote:
> where the denominator is made positive whenever possible (not possible
> when it's -INT_MAX).
(I meant INT_MIN rather than -INT_MAX.)
Another more-than-one-way-to-do-it task is converting a float to a
fraction. I translated John Kennedy's method [0] to C, but Github user
adegert sent an alternative [1] that matches the way the CPython
implementation works.
0: https://begriffs.com/pdf/dec2frac.pdf
1: https://github.com/begriffs/pg_rational/pull/13
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