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

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"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.
This commit is contained in:
Tom Lane 2011-04-09 14:08:41 -04:00
parent fe1438da8a
commit 7c76906b7e
2 changed files with 16 additions and 6 deletions
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8
doc/src/sgml/ref/psql-ref.sgml
View File

@ -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>

14
src/bin/psql/describe.c
View File

@ -2883,7 +2883,7 @@ listCasts(const char *pattern)
/*
* \dO
*
* Describes collations
* Describes collations.
*/
bool
listCollations(const char *pattern, bool verbose, bool showSystem)
@ -2907,17 +2907,25 @@ listCollations(const char *pattern, bool verbose, bool showSystem)
if (verbose)
appendPQExpBuffer(&buf,
",\n pg_catalog.obj_description(c.oid, 'pg_collation') AS \"%s\"",
",\n pg_catalog.obj_description(c.oid, 'pg_collation') AS \"%s\"",
gettext_noop("Description"));
appendPQExpBuffer(&buf,
"FROM pg_catalog.pg_collation c, pg_catalog.pg_namespace n\n"
"\nFROM pg_catalog.pg_collation c, pg_catalog.pg_namespace n\n"
"WHERE n.oid = c.collnamespace\n");
if (!showSystem && !pattern)
appendPQExpBuffer(&buf, " AND n.nspname <> 'pg_catalog'\n"
" AND n.nspname <> 'information_schema'\n");
/*
* Hide collations that aren't usable in the current database's encoding.
* If you think to change this, note that pg_collation_is_visible rejects
* unusable collations, so you will need to hack name pattern processing
* somehow to avoid inconsistent behavior.
*/
appendPQExpBuffer(&buf, " AND c.collencoding IN (-1, pg_catalog.pg_char_to_encoding(pg_catalog.getdatabaseencoding()))\n");
processSQLNamePattern(pset.db, &buf, pattern, true, false,
"n.nspname", "c.collname", NULL,
"pg_catalog.pg_collation_is_visible(c.oid)");