postgres.git / summary / log / commit / refs

commit    cfb33bc33a233c77571e007102bc4242e402762a
Author:   Bruce Momjian <bruce@momjian.us>
Date:     Sat Jul 02 15:22:35 2016 +0000

    doc: mention dependency on collation libraries
    
    Document that index storage is dependent on the operating system's
    collation library ordering, and any change in that ordering can create
    invalid indexes.
    
    Discussion: 20160617154311.GB19359@momjian.us
    
    Backpatch-through: 9.1


 doc/src/sgml/runtime.sgml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index 1045b398ab0..9f22be9fcd0 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -183,6 +183,15 @@ postgres$ <userinput>initdb -D /usr/local/pgsql/data</userinput>
    locale setting.  For details see <xref linkend="multibyte">.
   </para>
 
+  <para>
+   Non<literal>C</> and and non-<literal>POSIX</> locales rely on the
+   operating system's collation library for character set ordering.
+   This controls the ordering of keys stored in indexes.  For this reason,
+   a cluster cannot switch to an incompatible collation library version,
+   either through snapshot restore, binary streaming replication, or
+   <application>pg_upgrade</> run.
+  </para>
+
   <sect2 id="creating-cluster-mount-points">
    <title>Use of Secondary File Systems</title>
 


[parent: dd41661d2c61]