wikimedia/mediawiki-core

<?php

// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd

/**
 * Maintenance script that merges the revision_actor_temp table into the
 * revision table.
 *
 * @ingroup Maintenance
 * @since 1.37
 */
class MigrateRevisionActorTemp extends LoggedUpdateMaintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription(
            'Copy the data from the revision_actor_temp into the revision table'
        );
        $this->addOption(
            'sleep',
            'Sleep time (in seconds) between every batch. Default: 0',
            false,
            true
        );
        $this->addOption( 'start', 'Start after this rev_id', false, true );
    }

    protected function getUpdateKey() {
        return __CLASS__;
    }

    protected function doDBUpdates() {
        $batchSize = $this->getBatchSize();

        $dbw = $this->getDB( DB_PRIMARY );
        if ( !$dbw->fieldExists( 'revision', 'rev_actor', __METHOD__ ) ) {
            $this->output( "Run update.php to create rev_actor.\n" );
            return false;
        }
        if ( !$dbw->tableExists( 'revision_actor_temp', __METHOD__ ) ) {
            $this->output( "revision_actor_temp does not exist, so nothing to do.\n" );
            return true;
        }

        $this->output( "Merging the revision_actor_temp table into the revision table...\n" );
        $conds = [];
        $updated = 0;
        $start = (int)$this->getOption( 'start', 0 );
        if ( $start > 0 ) {
            $conds[] = $dbw->expr( 'rev_id', '>=', $start );
        }
        while ( true ) {
            $res = $dbw->newSelectQueryBuilder()
                ->select( [ 'rev_id', 'rev_actor', 'revactor_actor' ] )
                ->from( 'revision' )
                ->join( 'revision_actor_temp', null, 'rev_id=revactor_rev' )
                ->where( $conds )
                ->limit( $batchSize )
                ->orderBy( 'rev_id' )
                ->caller( __METHOD__ )
                ->fetchResultSet();

            $numRows = $res->numRows();

            $last = null;
            foreach ( $res as $row ) {
                $last = $row->rev_id;
                if ( !$row->rev_actor ) {
                    $dbw->newUpdateQueryBuilder()
                        ->update( 'revision' )
                        ->set( [ 'rev_actor' => $row->revactor_actor ] )
                        ->where( [ 'rev_id' => $row->rev_id ] )
                        ->caller( __METHOD__ )->execute();
                    $updated += $dbw->affectedRows();
                } elseif ( $row->rev_actor !== $row->revactor_actor ) {
                    $this->error(
                        "Revision ID $row->rev_id has rev_actor = $row->rev_actor and "
                        . "revactor_actor = $row->revactor_actor. Ignoring the latter."
                    );
                }
            }

            if ( $numRows < $batchSize ) {
                // We must have reached the end
                break;
            }

            // @phan-suppress-next-line PhanTypeSuspiciousStringExpression last is not-null when used
            $this->output( "... rev_id=$last, updated $updated\n" );
            $conds = [ $dbw->expr( 'rev_id', '>', $last ) ];

            // Sleep between batches for replication to catch up
            $this->waitForReplication();
            $sleep = (int)$this->getOption( 'sleep', 0 );
            if ( $sleep > 0 ) {
                sleep( $sleep );
            }
        }

        $this->output(
            "Completed merge of revision_actor into the revision table, "
            . "$updated rows updated.\n"
        );

        return true;
    }

}

// @codeCoverageIgnoreStart
$maintClass = MigrateRevisionActorTemp::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd