populateBacklinkNamespace.php

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<?php
require_once __DIR__ . '/Maintenance.php';

class PopulateBacklinkNamespace extends LoggedUpdateMaintenance {
    public function __construct() {
        parent::__construct();
        $this->mDescription = "Populate the *_from_namespace fields";
        $this->addOption( 'lastUpdatedId', "Highest page_id with updated links", false, true );
    }

    protected function getUpdateKey() {
        return 'populate *_from_namespace';
    }

    protected function updateSkippedMessage() {
        return '*_from_namespace column of backlink tables already populated.';
    }

    public function doDBUpdates() {
        $force = $this->getOption( 'force' );

        $db = $this->getDB( DB_MASTER );

        $this->output( "Updating *_from_namespace fields in links tables.\n" );

        $start = $this->getOption( 'lastUpdatedId' );
        if ( !$start ) {
            $start = $db->selectField( 'page', 'MIN(page_id)', false, __METHOD__ );
        }
        if ( !$start ) {
            $this->output( "Nothing to do." );
            return false;
        }
        $end = $db->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );

        # Do remaining chunk
        $end += $this->mBatchSize - 1;
        $blockStart = $start;
        $blockEnd = $start + $this->mBatchSize - 1;
        while ( $blockEnd <= $end ) {
            $this->output( "...doing page_id from $blockStart to $blockEnd\n" );
            $cond = "page_id BETWEEN $blockStart AND $blockEnd";
            $res = $db->select( 'page', array( 'page_id', 'page_namespace' ), $cond, __METHOD__ );
            foreach ( $res as $row ) {
                $db->update( 'pagelinks',
                    array( 'pl_from_namespace' => $row->page_namespace ),
                    array( 'pl_from' => $row->page_id ),
                    __METHOD__
                );
                $db->update( 'templatelinks',
                    array( 'tl_from_namespace' => $row->page_namespace ),
                    array( 'tl_from' => $row->page_id ),
                    __METHOD__
                );
                $db->update( 'imagelinks',
                    array( 'il_from_namespace' => $row->page_namespace ),
                    array( 'il_from' => $row->page_id ),
                    __METHOD__
                );
            }
            $blockStart += $this->mBatchSize - 1;
            $blockEnd += $this->mBatchSize - 1;
            wfWaitForSlaves();
        }
        return true;
    }
}

$maintClass = "PopulateBacklinkNamespace";
require_once RUN_MAINTENANCE_IF_MAIN;