1 files changed, 57 insertions, 11 deletions

diff --git a/maintenance/sql.php b/maintenance/sql.php
index 04e98d91..a628b0bc 100644
--- a/maintenance/sql.php
+++ b/maintenance/sql.php
@@ -22,7 +22,7 @@
  * @ingroup Maintenance
  */
 
-require_once( __DIR__ . '/Maintenance.php' );
+require_once __DIR__ . '/Maintenance.php';
 
 /**
  * Maintenance script that sends SQL queries from the specified file to the database.
@@ -33,13 +33,45 @@ 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() {
-		$dbw = wfGetDB( DB_MASTER );
-		if ( $this->hasArg() ) {
-			$fileName = $this->getArg();
-			$file = fopen( $fileName, 'r' );
+		// 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 );
 			}
@@ -63,26 +95,39 @@ class MwSql extends Maintenance {
 		}
 
 		$wholeLine = '';
-		while ( ( $line = Maintenance::readconsole() ) !== false ) {
+		$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 ) {
-				readline_add_history( $wholeLine );
+				# 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{
+			try {
 				$res = $dbw->query( $wholeLine );
 				$this->sqlPrintResult( $res, $dbw );
+				$prompt = $newPrompt;
 				$wholeLine = '';
-			} catch (DBQueryError $e) {
-				$this->error( $e, true );
+			} catch ( DBQueryError $e ) {
+				$doDie = ! Maintenance::posix_isatty( 0 );
+				$this->error( $e, $doDie );
 			}
 		}
+		wfWaitForSlaves();
 	}
 
 	/**
@@ -93,6 +138,7 @@ class MwSql extends Maintenance {
 	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 ) );
@@ -112,4 +158,4 @@ class MwSql extends Maintenance {
 }
 
 $maintClass = "MwSql";
-require_once( RUN_MAINTENANCE_IF_MAIN );
+require_once RUN_MAINTENANCE_IF_MAIN;