diff options
| author | Bruce Momjian | 2016-07-02 15:22:36 +0000 |
|---|---|---|
| committer | Bruce Momjian | 2016-07-02 15:22:36 +0000 |
| commit | b54f7a9ac9646845138f6851fdf3097e22daa383 (patch) | |
| tree | 9575bd51ddef36473b8fd382e625ebcf6b394814 | |
| parent | 7b67a0a49c19a566ee735f3b156677dab11bd902 (diff) | |
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
| -rw-r--r-- | doc/src/sgml/runtime.sgml | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml index 4a0e35a5eba..6d39ce7f22b 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> |