From 1a1e79751d5c6bd1a1d63ffbd993cd921d3e3974 Mon Sep 17 00:00:00 2001 From: Alvaro Herrera Date: Tue, 2 Jul 2013 12:21:16 -0400 Subject: [PATCH] Mention extra_float_digits in floating point docs Make it easier for readers of the FP docs to find out about possibly truncated values. Per complaint from Tom Duffey in message F0E0F874-C86F-48D1-AA2A-0C5365BF5118@trillitech.com Author: Albe Laurenz Reviewed by: Abhijit Menon-Sen --- doc/src/sgml/config.sgml | 1 + doc/src/sgml/datatype.sgml | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index ab40ea7612..088473a828 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -4739,6 +4739,7 @@ SET XML OPTION { DOCUMENT | CONTENT }; partially-significant digits; this is especially useful for dumping float data that needs to be restored exactly. Or it can be set negative to suppress unwanted digits. + See also . diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml index 0e07cc35ea..f15a47a2f4 100644 --- a/doc/src/sgml/datatype.sgml +++ b/doc/src/sgml/datatype.sgml @@ -663,6 +663,17 @@ NUMERIC from zero will cause an underflow error. + + + The 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 + 0, the output is the same on every platform + supported by PostgreSQL. Increasing it will produce output that + more accurately represents the stored value, but may be unportable. + + + not a number double precision -- 2.50.0