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https://github.com/YunoHost-Apps/mediawiki_ynh.git
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91 lines
3.2 KiB
PHP
91 lines
3.2 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Maintenance
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*/
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/**
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* When using shared tables that are referenced by foreign keys on local
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* tables you have to change the constraints on local tables.
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*
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* The shared tables have to have GRANT REFERENCE on shared tables to local schema
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* i.e.: GRANT REFERENCES (user_id) ON mwuser TO hubclient;
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*/
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require_once __DIR__ . '/../Maintenance.php';
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class AlterSharedConstraints extends Maintenance {
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public function __construct() {
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parent::__construct();
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$this->mDescription = "Alter foreign key to reference master tables in shared database setup.";
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}
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public function getDbType() {
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return Maintenance::DB_ADMIN;
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}
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public function execute() {
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global $wgSharedDB, $wgSharedTables, $wgSharedPrefix, $wgDBprefix;
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if ( $wgSharedDB == null ) {
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$this->output( "Database sharing is not enabled\n" );
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return;
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}
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$dbw = wfGetDB( DB_MASTER );
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foreach ( $wgSharedTables as $table ) {
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$stable = $dbw->tableNameInternal( $table );
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if ( $wgSharedPrefix != null ) {
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$ltable = preg_replace( "/^$wgSharedPrefix(.*)/i", "$wgDBprefix\\1", $stable );
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} else {
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$ltable = "{$wgDBprefix}{$stable}";
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}
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$result = $dbw->query( "SELECT uc.constraint_name, uc.table_name, ucc.column_name, uccpk.table_name pk_table_name, uccpk.column_name pk_column_name, uc.delete_rule, uc.deferrable, uc.deferred
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FROM user_constraints uc, user_cons_columns ucc, user_cons_columns uccpk
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WHERE uc.constraint_type = 'R'
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AND ucc.constraint_name = uc.constraint_name
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AND uccpk.constraint_name = uc.r_constraint_name
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AND uccpk.table_name = '$ltable'" );
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while ( ( $row = $result->fetchRow() ) !== false ) {
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$this->output( "Altering {$row['constraint_name']} ..." );
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try {
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$dbw->query( "ALTER TABLE {$row['table_name']} DROP CONSTRAINT {$wgDBprefix}{$row['constraint_name']}" );
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} catch ( DBQueryError $exdb ) {
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if ( $exdb->errno != 2443 ) {
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throw $exdb;
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}
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}
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$deleteRule = $row['delete_rule'] == 'NO ACTION' ? '' : "ON DELETE {$row['delete_rule']}";
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$dbw->query( "ALTER TABLE {$row['table_name']} ADD CONSTRAINT {$wgDBprefix}{$row['constraint_name']}
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FOREIGN KEY ({$row['column_name']})
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REFERENCES {$wgSharedDB}.$stable({$row['pk_column_name']})
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{$deleteRule} {$row['deferrable']} INITIALLY {$row['deferred']}" );
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$this->output( "DONE\n" );
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}
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}
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}
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}
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$maintClass = "AlterSharedConstraints";
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require_once RUN_MAINTENANCE_IF_MAIN;
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