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| -rw-r--r-- | doc/src/sgml/config.sgml | 1 | ||||
| -rw-r--r-- | doc/src/sgml/datatype.sgml | 11 |
2 files changed, 12 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 940ed6ef58b..437dbb7711c 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -5366,6 +5366,7 @@ 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 <xref linkend="datatype-float">. </para> </listitem> </varlistentry> diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml index f73e6b2e3a5..87668ea0c1c 100644 --- a/doc/src/sgml/datatype.sgml +++ b/doc/src/sgml/datatype.sgml @@ -681,6 +681,17 @@ NUMERIC from zero will cause an underflow error. </para> + <note> + <para> + 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 the same on every platform + supported by PostgreSQL. Increasing it will produce output that + more accurately represents the stored value, but may be unportable. + </para> + </note> + <indexterm> <primary>not a number</primary> <secondary>double precision</secondary> |