migrateRevisionCommentTemp.php

Go to the documentation of this file.

<?php
// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd
 
class MigrateRevisionCommentTemp extends LoggedUpdateMaintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription(
            'Copy the data from the revision_comment_temp into the revision table'
        );
        $this->addOption(
            'sleep',
            'Sleep time (in seconds) between every batch. Default: 0',
            false,
            true
        );
    }
 
    protected function getUpdateKey() {
        return __CLASS__;
    }
 
    protected function doDBUpdates() {
        $batchSize = $this->getBatchSize();
 
        $dbw = $this->getDB( DB_PRIMARY );
        if ( !$dbw->fieldExists( 'revision', 'rev_comment_id', __METHOD__ ) ) {
            $this->output( "Run update.php to create rev_comment_id.\n" );
            return false;
        }
        if ( !$dbw->tableExists( 'revision_comment_temp', __METHOD__ ) ) {
            $this->output( "revision_comment_temp does not exist, so nothing to do.\n" );
            return true;
        }
 
        $this->output( "Merging the revision_comment_temp table into the revision table...\n" );
        $conds = [];
        $updated = 0;
        $sleep = (int)$this->getOption( 'sleep', 0 );
        while ( true ) {
            $res = $dbw->newSelectQueryBuilder()
                ->select( [ 'rev_id', 'revcomment_comment_id' ] )
                ->from( 'revision' )
                ->join( 'revision_comment_temp', null, 'rev_id=revcomment_rev' )
                ->where( [ 'rev_comment_id' => 0 ] )
                ->andWhere( $conds )
                ->limit( $batchSize )
                ->orderBy( 'rev_id' )
                ->caller( __METHOD__ )
                ->fetchResultSet();
 
            $numRows = $res->numRows();
 
            $last = null;
            foreach ( $res as $row ) {
                $last = $row->rev_id;
                $dbw->newUpdateQueryBuilder()
                    ->update( 'revision' )
                    ->set( [ 'rev_comment_id' => $row->revcomment_comment_id ] )
                    ->where( [ 'rev_id' => $row->rev_id ] )
                    ->caller( __METHOD__ )->execute();
                $updated += $dbw->affectedRows();
            }
 
            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();
            if ( $sleep > 0 ) {
                sleep( $sleep );
            }
        }
        $this->output(
            "Completed merge of revision_comment_temp into the revision table, "
            . "$updated rows updated.\n"
        );
        return true;
    }
}
 
// @codeCoverageIgnoreStart
$maintClass = MigrateRevisionCommentTemp::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd