Re: [GENERAL] Floating point error

Abhijit Menon-Sen wrote:
> Sorry to nitpick, but I don't like that either, on the grounds that if I
> had been in Tom Duffey's place, this addition to the docs wouldn't help
> me to understand and resolve the problem.
>
> I'm not entirely convinced that any brief mention of extra_float_digits
> would suffice, but here's a proposed rewording:
>
> The <xref linkend="guc-extra-float-digits"> setting controls the
> number of extra significant digits included when a floating point
> value is converted to text for output. With the default value of
> <literal>0</literal>, the output is portable to every platform
> supported by PostgreSQL. Increasing it will produce output that
> is closer to the stored value, but may be unportable.
>
> It's a pretty generic sort of warning, but maybe it would help?

If I understood the original complaint right, anything that gives you
a hint that the textual representation is "truncated" would be helpful.

I like your suggestion and elaborated it a little.

What do you think of the attached version?

Yours,
Laurenz Albe