From 48019ed5546c3acf9bbdef32314a2c0e2174365e Mon Sep 17 00:00:00 2001
From: Daniel Friesen <dantman@users.mediawiki.org>
Date: Mon, 30 Jun 2008 05:16:38 +0000
Subject: [PATCH] Some missing changes for the $wgShared(DB|Prefix|Tables)
 setup: * $wgCookiePrefix: ** Shared stuff should always come before local
 stuff when setting the cookie prefix (by my count, if you set $wgSharedDB and
 $wgDBprefix with the old order, even though your usertable is shared, your
 cookies would be local and logins wouldn't be shared right. ** Because the
 user table isn't always shared anymore, we only want shared code when
 $wgSharedTables has 'user' set inside of it. ** We now have $wgSharedPrefix,
 this should also be accounted for in the cookie prefix. * updaders.inc: The
 logic for the $doUser test has changed since the conditions that the user
 table is shared has changed. Now when $shared is true we only want to $doUser
 when we have a shared database and 'user' is being shared, otherwise if
 $shared is false, we only want to $doUser when there is no shared database,
 or 'user' is not being shared.

Check MediaWiki.org's $wgSharedDB documentation for those on 1.12, I'll post a link there to a patch I maintain for 1.12.
---
 includes/Setup.php       | 8 +++++---
 maintenance/updaters.inc | 4 ++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/includes/Setup.php b/includes/Setup.php
index 2e0f15bdb8..61b31739ad 100644
--- a/includes/Setup.php
+++ b/includes/Setup.php
@@ -204,10 +204,12 @@ wfProfileIn( $fname.'-SetupSession' );
 # Set default shared prefix
 if( $wgSharedPrefix === false ) $wgSharedPrefix = $wgDBprefix;
 
-if ( $wgDBprefix ) {
-	$wgCookiePrefix = $wgDBname . '_' . $wgDBprefix;
-} elseif ( $wgSharedDB ) {
+if ( in_array('user', $wgSharedTables) && $wgSharedDB && $wgSharedPrefix ) {
+	$wgCookiePrefix = $wgSharedDB . '_' . $wgSharedPrefix;
+} elseif ( in_array('user', $wgSharedTables) && $wgSharedDB ) {
 	$wgCookiePrefix = $wgSharedDB;
+} elseif ( $wgDBprefix ) {
+	$wgCookiePrefix = $wgDBname . '_' . $wgDBprefix;
 } else {
 	$wgCookiePrefix = $wgDBname;
 }
diff --git a/maintenance/updaters.inc b/maintenance/updaters.inc
index c83893b2dc..a882dae46f 100644
--- a/maintenance/updaters.inc
+++ b/maintenance/updaters.inc
@@ -1034,11 +1034,11 @@ function purge_cache() {
 }
 
 function do_all_updates( $shared = false, $purge = true ) {
-	global $wgNewTables, $wgNewFields, $wgRenamedTables, $wgSharedDB, $wgDatabase, $wgDBtype, $IP;
+	global $wgNewTables, $wgNewFields, $wgRenamedTables, $wgSharedDB, $wgSharedTables, $wgDatabase, $wgDBtype, $IP;
 
 	wfRunHooks('LoadExtensionSchemaUpdates');
 
-	$doUser = !$wgSharedDB || $shared;
+	$doUser = $shared ? $wgSharedDB && in_array('user', $wgSharedTables) : !$wgSharedDB || !in_array('user', $wgSharedTables);
 
 	if ($wgDBtype === 'postgres') {
 		do_postgres_updates();
-- 
2.20.1