sql.php

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

class MwSql extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->mDescription = "Send SQL queries to a MediaWiki database";
        $this->addOption( 'cluster', 'Use an external cluster by name', false, true );
        $this->addOption( 'slave', 'Use a slave server (either "any" or by name)', false, true );
    }

    public function execute() {
        // Get the appropriate load balancer (for this wiki)
        if ( $this->hasOption( 'cluster' ) ) {
            $lb = wfGetLBFactory()->getExternalLB( $this->getOption( 'cluster' ) );
        } else {
            $lb = wfGetLB();
        }
        // Figure out which server to use
        if ( $this->hasOption( 'slave' ) ) {
            $server = $this->getOption( 'slave' );
            if ( $server === 'any' ) {
                $index = DB_SLAVE;
            } else {
                $index = null;
                for ( $i = 0; $i < $lb->getServerCount(); ++$i ) {
                    if ( $lb->getServerName( $i ) === $server ) {
                        $index = $i;
                        break;
                    }
                }
                if ( $index === null ) {
                    $this->error( "No slave server configured with the name '$server'.", 1 );
                }
            }
        } else {
            $index = DB_MASTER;
        }
        // Get a DB handle (with this wiki's DB selected) from the appropriate load balancer
        $dbw = $lb->getConnection( $index );
        if ( $this->hasOption( 'slave' ) && $dbw->getLBInfo( 'master' ) !== null ) {
            $this->error( "The server selected ({$dbw->getServer()}) is not a slave.", 1 );
        }

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

            $error = $dbw->sourceStream( $file, false, array( $this, 'sqlPrintResult' ) );
            if ( $error !== true ) {
                $this->error( $error, true );
            } else {
                exit( 0 );
            }
        }

        $useReadline = function_exists( 'readline_add_history' )
                && Maintenance::posix_isatty( 0 /*STDIN*/ );

        if ( $useReadline ) {
            global $IP;
            $historyFile = isset( $_ENV['HOME'] ) ?
                    "{$_ENV['HOME']}/.mwsql_history" : "$IP/maintenance/.mwsql_history";
            readline_read_history( $historyFile );
        }

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

            $wholeLine .= $line;

            if ( !$done ) {
                $wholeLine .= ' ';
                $prompt = '    -> ';
                continue;
            }
            if ( $useReadline ) {
                # Delimiter is eated by streamStatementEnd, we add it
                # up in the history (bug 37020)
                readline_add_history( $wholeLine . $dbw->getDelimiter() );
                readline_write_history( $historyFile );
            }
            try {
                $res = $dbw->query( $wholeLine );
                $this->sqlPrintResult( $res, $dbw );
                $prompt = $newPrompt;
                $wholeLine = '';
            } catch ( DBQueryError $e ) {
                $doDie = ! Maintenance::posix_isatty( 0 );
                $this->error( $e, $doDie );
            }
        }
        wfWaitForSlaves();
    }

    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;