Don't show unusable collations in psql's \dO command.

"Unusable" collations are those not matching the current database's
encoding.  The former behavior inconsistently showed such collations
some of the time, depending on the details of the pattern argument.

1 files changed, 5 insertions, 3 deletions

diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index 24e8ee0a368..ac351d32d42 100644
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -1264,7 +1264,7 @@ testdb=>
         <term><literal>\dL[S+] [ <link linkend="APP-PSQL-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
         <listitem>
         <para>
-        Lists all procedural languages. If <replaceable
+        Lists procedural languages. If <replaceable
         class="parameter">pattern</replaceable>
         is specified, only languages whose names match the pattern are listed.
         By default, only user-created languages
@@ -1311,7 +1311,6 @@ testdb=&gt;
 
       <varlistentry>
         <term><literal>\dO[S+] [ <link linkend="APP-PSQL-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
-
         <listitem>
         <para>
         Lists collations.
@@ -1320,8 +1319,11 @@ testdb=&gt;
         listed.  By default, only user-created objects are shown;
         supply a pattern or the <literal>S</literal> modifier to
         include system objects.  If <literal>+</literal> is appended
-        to the command name, each object is listed with its associated
+        to the command name, each collation is listed with its associated
         description, if any.
+        Note that only collations usable with the current database's encoding
+        are shown, so the results may vary in different databases of the
+        same installation.
         </para>
         </listitem>
       </varlistentry>