Horton

Re: Rounding strategy

Laurenz Albe <laurenz.albe@cybertec.at>

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From: Laurenz Albe <laurenz.albe@cybertec.at>
To: rudolphfroger@dreamsolution.nl, pgsql-docs@lists.postgresql.org
Date: 2021-04-22T16:54:54Z
Lists: pgsql-docs

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On Mon, 2021-04-19 at 08:00 +0000, PG Doc comments form wrote:
> The 'round' mathematical function documentation doesn't specify its rounding
> strategy. If this would be documented then users can rely on its rounding
> behavior. For double precision the rounding probably depends on your
> platform. For numeric the function seems to round to nearest with ties going
> away from zero (sometimes referred to as "round half up). 6.5 -> 7.0 and
> -6.5 -> -7.0.

Here is a proposed patch.

Yours,
Laurenz Albe

Commits

  1. Doc: document the tie-breaking behavior of the round() function.