sql.php

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

class MwSql extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Send SQL queries to a MediaWiki database. ' .
            'Takes a file name containing SQL as argument or runs interactively.' );
        $this->addOption( 'query',
            'Run a single query instead of running interactively', false, true );
        $this->addOption( 'cluster', 'Use an external cluster by name', false, true );
        $this->addOption( 'wikidb',
            'The database wiki ID to use if not the current one', false, true );
        $this->addOption( 'replicadb',
            'Replica DB server to use instead of the master DB (can be "any")', false, true );
    }

    public function execute() {
        global $IP;

        // We wan't to allow "" for the wikidb, meaning don't call select_db()
        $wiki = $this->hasOption( 'wikidb' ) ? $this->getOption( 'wikidb' ) : false;
        // Get the appropriate load balancer (for this wiki)
        if ( $this->hasOption( 'cluster' ) ) {
            $lb = wfGetLBFactory()->getExternalLB( $this->getOption( 'cluster' ), $wiki );
        } else {
            $lb = wfGetLB( $wiki );
        }
        // Figure out which server to use
        $replicaDB = $this->getOption( 'replicadb', $this->getOption( 'slave', '' ) );
        if ( $replicaDB === 'any' ) {
            $index = DB_REPLICA;
        } elseif ( $replicaDB != '' ) {
            $index = null;
            $serverCount = $lb->getServerCount();
            for ( $i = 0; $i < $serverCount; ++$i ) {
                if ( $lb->getServerName( $i ) === $replicaDB ) {
                    $index = $i;
                    break;
                }
            }
            if ( $index === null ) {
                $this->error( "No replica DB server configured with the name '$replicaDB'.", 1 );
            }
        } else {
            $index = DB_MASTER;
        }

        $db = $lb->getConnection( $index, [], $wiki );
        if ( $replicaDB != '' && $db->getLBInfo( 'master' ) !== null ) {
            $this->error( "The server selected ({$db->getServer()}) is not a replica DB.", 1 );
        }

        if ( $index === DB_MASTER ) {
            $updater = DatabaseUpdater::newForDB( $db, true, $this );
            $db->setSchemaVars( $updater->getSchemaVars() );
        }

        if ( $this->hasArg( 0 ) ) {
            $file = fopen( $this->getArg( 0 ), 'r' );
            if ( !$file ) {
                $this->error( "Unable to open input file", true );
            }

            $error = $db->sourceStream( $file, null, [ $this, 'sqlPrintResult' ] );
            if ( $error !== true ) {
                $this->error( $error, true );
            } else {
                exit( 0 );
            }
        }

        if ( $this->hasOption( 'query' ) ) {
            $query = $this->getOption( 'query' );
            $this->sqlDoQuery( $db, $query, /* dieOnError */ true );
            wfWaitForSlaves();
            return;
        }

        if (
            function_exists( 'readline_add_history' ) &&
            Maintenance::posix_isatty( 0 /*STDIN*/ )
        ) {
            $historyFile = isset( $_ENV['HOME'] ) ?
                "{$_ENV['HOME']}/.mwsql_history" : "$IP/maintenance/.mwsql_history";
            readline_read_history( $historyFile );
        } else {
            $historyFile = null;
        }

        $wholeLine = '';
        $newPrompt = '> ';
        $prompt = $newPrompt;
        $doDie = !Maintenance::posix_isatty( 0 );
        while ( ( $line = Maintenance::readconsole( $prompt ) ) !== false ) {
            if ( !$line ) {
                # User simply pressed return key
                continue;
            }
            $done = $db->streamStatementEnd( $wholeLine, $line );

            $wholeLine .= $line;

            if ( !$done ) {
                $wholeLine .= ' ';
                $prompt = '    -> ';
                continue;
            }
            if ( $historyFile ) {
                # Delimiter is eated by streamStatementEnd, we add it
                # up in the history (bug 37020)
                readline_add_history( $wholeLine . ';' );
                readline_write_history( $historyFile );
            }
            $this->sqlDoQuery( $db, $wholeLine, $doDie );
            $prompt = $newPrompt;
            $wholeLine = '';
        }
        wfWaitForSlaves();
    }

    protected function sqlDoQuery( IDatabase $db, $line, $dieOnError ) {
        try {
            $res = $db->query( $line );
            $this->sqlPrintResult( $res, $db );
        } catch ( DBQueryError $e ) {
            $this->error( $e, $dieOnError );
        }
    }

    public function sqlPrintResult( $res, $db ) {
        if ( !$res ) {
            // Do nothing
            return;
        } elseif ( is_object( $res ) && $res->numRows() ) {
            foreach ( $res as $row ) {
                $this->output( print_r( $row, true ) );
            }
        } else {
            $affected = $db->affectedRows();
            $this->output( "Query OK, $affected row(s) affected\n" );
        }
    }

    public function getDbType() {
        return Maintenance::DB_ADMIN;
    }
}

$maintClass = "MwSql";
require_once RUN_MAINTENANCE_IF_MAIN;