Horton

Re: Ryu floating point output patch

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>, pgsql-hackers@postgresql.org, "David G. Johnston" <david.g.johnston@gmail.com>, Donald Dong <xdong@csumb.edu>, Andres Freund <andres@anarazel.de>, Robert Haas <robertmhaas@gmail.com>, Chapman Flack <chap@anastigmatix.net>
Date: 2019-02-17T23:49:04Z
Lists: pgsql-hackers 
Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> "Andrew" == Andrew Dunstan <andrew.dunstan@2ndquadrant.com> writes:
>  Andrew> Would you like to reformulate this, then?

> How about:

>     Use the specified value of extra_float_digits when dumping
>     floating-point data, instead of the maximum available precision.
>     Routine dumps made for backup purposes should not use this option.

OK by me.

			regards, tom lane

Commits

  1. Provide an extra-float-digits setting for pg_dump / pg_dumpall

  2. Change floating-point output format for improved performance.

  3. Use strtof() and not strtod() for float4 input.