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<?php /** * Performs some operations specific to SQLite database backend. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file * @ingroup Maintenance */ use Wikimedia\AtEase\AtEase; use Wikimedia\Rdbms\DBConnRef; use Wikimedia\Rdbms\IMaintainableDatabase; // @codeCoverageIgnoreStart require_once __DIR__ . '/Maintenance.php'; // @codeCoverageIgnoreEnd /** * Maintenance script that performs some operations specific to SQLite database backend. * * @ingroup Maintenance */ class SqliteMaintenance extends Maintenance { public function __construct() { parent::__construct(); $this->addDescription( 'Performs some operations specific to SQLite database backend' ); $this->addOption( 'vacuum', 'Clean up database by removing deleted pages. Decreases database file size' ); $this->addOption( 'integrity', 'Check database for integrity' ); $this->addOption( 'backup-to', 'Backup database to the given file', false, true ); $this->addOption( 'check-syntax', 'Check SQL file(s) for syntax errors', false, true ); } public function execute() { // Should work even if we use a non-SQLite database if ( $this->hasOption( 'check-syntax' ) ) { $this->checkSyntax(); return; } $lb = $this->getServiceContainer()->getDBLoadBalancer(); $dbw = $lb->getMaintenanceConnectionRef( DB_PRIMARY ); if ( $dbw->getType() !== 'sqlite' ) { $this->error( "This maintenance script requires a SQLite database.\n" ); return; } if ( $this->hasOption( 'vacuum' ) ) { $this->vacuum( $dbw ); } if ( $this->hasOption( 'integrity' ) ) { $this->integrityCheck( $dbw ); } if ( $this->hasOption( 'backup-to' ) ) { $this->backup( $dbw, $this->getOption( 'backup-to' ) ); } } private function vacuum( DBConnRef $dbw ) { // Call non-standard DatabaseSqlite::getDbFilePath method $prevSize = filesize( $dbw->__call( 'getDbFilePath', [] ) ); if ( $prevSize == 0 ) { $this->fatalError( "Can't vacuum an empty database.\n" ); } $this->output( 'VACUUM: ' ); if ( $dbw->query( 'VACUUM', __METHOD__ ) ) { clearstatcache(); $newSize = filesize( $dbw->getDbFilePath() ); $this->output( sprintf( "Database size was %d, now %d (%.1f%% reduction).\n", $prevSize, $newSize, ( $prevSize - $newSize ) * 100.0 / $prevSize ) ); } else { $this->output( 'Error\n' ); } } private function integrityCheck( IMaintainableDatabase $dbw ) { $this->output( "Performing database integrity checks:\n" ); $res = $dbw->query( 'PRAGMA integrity_check', __METHOD__ ); if ( !$res || $res->numRows() == 0 ) { $this->error( "Error: integrity check query returned nothing.\n" ); return; } foreach ( $res as $row ) { $this->output( $row->integrity_check ); } } private function backup( DBConnRef $dbw, $fileName ) { $this->output( "Backing up database:\n Locking..." ); $dbw->query( 'BEGIN IMMEDIATE TRANSACTION', __METHOD__ ); $ourFile = $dbw->__call( 'getDbFilePath', [] ); $this->output( " Copying database file $ourFile to $fileName..." ); AtEase::suppressWarnings(); if ( !copy( $ourFile, $fileName ) ) { $err = error_get_last(); $this->error( " {$err['message']}" ); } AtEase::restoreWarnings(); $this->output( " Releasing lock...\n" ); $dbw->query( 'COMMIT TRANSACTION', __METHOD__ ); } private function checkSyntax() { if ( !Sqlite::isPresent() ) { $this->error( "Error: SQLite support not found\n" ); } $files = [ $this->getOption( 'check-syntax' ) ]; $files = array_merge( $files, $this->mArgs ); $result = Sqlite::checkSqlSyntax( $files ); if ( $result === true ) { $this->output( "SQL syntax check: no errors detected.\n" ); } else { $this->error( "Error: $result\n" ); } } } // @codeCoverageIgnoreStart $maintClass = SqliteMaintenance::class; require_once RUN_MAINTENANCE_IF_MAIN; // @codeCoverageIgnoreEnd
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