[CF 5498] v3 - Adding extension default version to \dx

This branch was automatically generated by a robot using patches from an
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https://commitfest.postgresql.org/patch/5498

The branch will be overwritten each time a new patch version is posted to
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Patch(es): https://www.postgresql.org/message-id/[email protected]
Author(s): Magnus Hagander, Jelte Fennema-Nio

Author: Commitfest Bot

src/bin/psql/describe.c

@@ -6188,13 +6188,16 @@ listExtensions(const char *pattern)
 	initPQExpBuffer(&buf);
 	printfPQExpBuffer(&buf,
 					  "SELECT e.extname AS \"%s\", "
-					  "e.extversion AS \"%s\", n.nspname AS \"%s\", c.description AS \"%s\"\n"
+					  "e.extversion AS \"%s\", ae.default_version AS \"%s\","
+					  "n.nspname AS \"%s\", d.description AS \"%s\"\n"
 					  "FROM pg_catalog.pg_extension e "
 					  "LEFT JOIN pg_catalog.pg_namespace n ON n.oid = e.extnamespace "
-					  "LEFT JOIN pg_catalog.pg_description c ON c.objoid = e.oid "
-					  "AND c.classoid = 'pg_catalog.pg_extension'::pg_catalog.regclass\n",
+					  "LEFT JOIN pg_catalog.pg_description d ON d.objoid = e.oid "
+					  "LEFT JOIN pg_catalog.pg_available_extensions() ae(name, default_version, comment) ON ae.name = e.extname "
+					  "AND d.classoid = 'pg_catalog.pg_extension'::pg_catalog.regclass\n",
 					  gettext_noop("Name"),
 					  gettext_noop("Version"),
+					  gettext_noop("Default version"),
 					  gettext_noop("Schema"),
 					  gettext_noop("Description"));
 

src/test/regress/expected/psql.out

@@ -6460,9 +6460,9 @@ List of schemas
 (0 rows)
 
 \dx "no.such.installed.extension"
-     List of installed extensions
- Name | Version | Schema | Description 
-------+---------+--------+-------------
+              List of installed extensions
+ Name | Version | Default version | Schema | Description 
+------+---------+-----------------+--------+-------------
 (0 rows)
 
 \dX "no.such.extended.statistics"