cleanupAncientTables.php

Go to the documentation of this file.

<?php
require_once __DIR__ . '/Maintenance.php';
 
class CleanupAncientTables extends Maintenance {
 
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Cleanup ancient tables and indexes' );
        $this->addOption( 'force', 'Actually run this script' );
    }
 
    public function execute() {
        if ( !$this->hasOption( 'force' ) ) {
            $this->error( "This maintenance script will remove old columns and indexes.\n"
                . "It is recommended to backup your database first, and ensure all your data has\n"
                . "been migrated to newer tables. If you want to continue, run this script again\n"
                . "with --force.\n"
            );
        }
 
        $db = $this->getDB( DB_MASTER );
        $ancientTables = [
            'blobs', // 1.4
            'brokenlinks', // 1.4
            'cur', // 1.4
            'ip_blocks_old', // Temporary in 1.6
            'links', // 1.4
            'linkscc', // 1.4
            // 'math', // 1.18, but don't want to drop if math extension is enabled...
            'old', // 1.4
            'oldwatchlist', // pre 1.1?
            'trackback', // 1.19
            'user_rights', // 1.5
            'validate', // 1.6
        ];
 
        foreach ( $ancientTables as $table ) {
            if ( $db->tableExists( $table, __METHOD__ ) ) {
                $this->output( "Dropping table $table..." );
                $db->dropTable( $table, __METHOD__ );
                $this->output( "done.\n" );
            }
        }
 
        $this->output( "Cleaning up text table\n" );
 
        $oldIndexes = [
            'old_namespace',
            'old_timestamp',
            'name_title_timestamp',
            'user_timestamp',
            'usertext_timestamp',
        ];
        foreach ( $oldIndexes as $index ) {
            if ( $db->indexExists( 'text', $index, __METHOD__ ) ) {
                $this->output( "Dropping index $index from the text table..." );
                $db->query( "DROP INDEX " . $db->addIdentifierQuotes( $index )
                    . " ON " . $db->tableName( 'text' ) );
                $this->output( "done.\n" );
            }
        }
 
        $oldFields = [
            'old_namespace',
            'old_title',
            'old_comment',
            'old_user',
            'old_user_text',
            'old_timestamp',
            'old_minor_edit',
            'inverse_timestamp',
        ];
        foreach ( $oldFields as $field ) {
            if ( $db->fieldExists( 'text', $field, __METHOD__ ) ) {
                $this->output( "Dropping the $field field from the text table..." );
                $db->query( "ALTER TABLE  " . $db->tableName( 'text' )
                    . " DROP COLUMN " . $db->addIdentifierQuotes( $field ) );
                $this->output( "done.\n" );
            }
        }
        $this->output( "Done!\n" );
    }
}
 
$maintClass = "CleanupAncientTables";
require_once RUN_MAINTENANCE_IF_MAIN;