update to MediaWiki 1.16.0

1 files changed, 453 insertions, 0 deletions

diff --git a/includes/db/DatabaseMysql.php b/includes/db/DatabaseMysql.php
new file mode 100644
index 00000000..ea7ef5b9
--- /dev/null
+++ b/includes/db/DatabaseMysql.php
@@ -0,0 +1,453 @@
+<?php
+/**
+ * Database abstraction object for mySQL
+ * Inherit all methods and properties of Database::Database()
+ *
+ * @ingroup Database
+ * @see Database
+ */
+class DatabaseMysql extends DatabaseBase {
+	function getType() {
+		return 'mysql';
+	}
+
+	/*private*/ function doQuery( $sql ) {
+		if( $this->bufferResults() ) {
+			$ret = mysql_query( $sql, $this->mConn );
+		} else {
+			$ret = mysql_unbuffered_query( $sql, $this->mConn );
+		}
+		return $ret;
+	}
+
+	function open( $server, $user, $password, $dbName ) {
+		global $wgAllDBsAreLocalhost;
+		wfProfileIn( __METHOD__ );
+
+		# Test for missing mysql.so
+		# First try to load it
+		if (!@extension_loaded('mysql')) {
+			@dl('mysql.so');
+		}
+
+		# Fail now
+		# Otherwise we get a suppressed fatal error, which is very hard to track down
+		if ( !function_exists( 'mysql_connect' ) ) {
+			throw new DBConnectionError( $this, "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
+		}
+
+		# Debugging hack -- fake cluster
+		if ( $wgAllDBsAreLocalhost ) {
+			$realServer = 'localhost';
+		} else {
+			$realServer = $server;
+		}
+		$this->close();
+		$this->mServer = $server;
+		$this->mUser = $user;
+		$this->mPassword = $password;
+		$this->mDBname = $dbName;
+
+		$success = false;
+
+		wfProfileIn("dbconnect-$server");
+
+		# The kernel's default SYN retransmission period is far too slow for us,
+		# so we use a short timeout plus a manual retry. Retrying means that a small
+		# but finite rate of SYN packet loss won't cause user-visible errors.
+		$this->mConn = false;
+		if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
+			$numAttempts = 2;
+		} else {
+			$numAttempts = 1;
+		}
+		$this->installErrorHandler();
+		for ( $i = 0; $i < $numAttempts && !$this->mConn; $i++ ) {
+			if ( $i > 1 ) {
+				usleep( 1000 );
+			}
+			if ( $this->mFlags & DBO_PERSISTENT ) {
+				$this->mConn = mysql_pconnect( $realServer, $user, $password );
+			} else {
+				# Create a new connection...
+				$this->mConn = mysql_connect( $realServer, $user, $password, true );
+			}
+			if ($this->mConn === false) {
+				#$iplus = $i + 1;
+				#wfLogDBError("Connect loop error $iplus of $max ($server): " . mysql_errno() . " - " . mysql_error()."\n"); 
+			}
+		}
+		$phpError = $this->restoreErrorHandler();
+		# Always log connection errors
+		if ( !$this->mConn ) {
+			$error = $this->lastError();
+			if ( !$error ) {
+				$error = $phpError;
+			}
+			wfLogDBError( "Error connecting to {$this->mServer}: $error\n" );
+			wfDebug( "DB connection error\n" );
+			wfDebug( "Server: $server, User: $user, Password: " .
+				substr( $password, 0, 3 ) . "..., error: " . mysql_error() . "\n" );
+			$success = false;
+		}
+		
+		wfProfileOut("dbconnect-$server");
+
+		if ( $dbName != '' && $this->mConn !== false ) {
+			$success = @/**/mysql_select_db( $dbName, $this->mConn );
+			if ( !$success ) {
+				$error = "Error selecting database $dbName on server {$this->mServer} " .
+					"from client host " . wfHostname() . "\n";
+				wfLogDBError(" Error selecting database $dbName on server {$this->mServer} \n");
+				wfDebug( $error );
+			}
+		} else {
+			# Delay USE query
+			$success = (bool)$this->mConn;
+		}
+
+		if ( $success ) {
+			$version = $this->getServerVersion();
+			if ( version_compare( $version, '4.1' ) >= 0 ) {
+				// Tell the server we're communicating with it in UTF-8.
+				// This may engage various charset conversions.
+				global $wgDBmysql5;
+				if( $wgDBmysql5 ) {
+					$this->query( 'SET NAMES utf8', __METHOD__ );
+				}
+				// Turn off strict mode
+				$this->query( "SET sql_mode = ''", __METHOD__ );
+			}
+
+			// Turn off strict mode if it is on
+		} else {
+			$this->reportConnectionError( $phpError );
+		}
+
+		$this->mOpened = $success;
+		wfProfileOut( __METHOD__ );
+		return $success;
+	}
+
+	function close() {
+		$this->mOpened = false;
+		if ( $this->mConn ) {
+			if ( $this->trxLevel() ) {
+				$this->commit();
+			}
+			return mysql_close( $this->mConn );
+		} else {
+			return true;
+		}
+	}
+
+	function freeResult( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		if ( !@/**/mysql_free_result( $res ) ) {
+			throw new DBUnexpectedError( $this, "Unable to free MySQL result" );
+		}
+	}
+
+	function fetchObject( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		@/**/$row = mysql_fetch_object( $res );
+		if( $this->lastErrno() ) {
+			throw new DBUnexpectedError( $this, 'Error in fetchObject(): ' . htmlspecialchars( $this->lastError() ) );
+		}
+		return $row;
+	}
+
+ 	function fetchRow( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		@/**/$row = mysql_fetch_array( $res );
+		if ( $this->lastErrno() ) {
+			throw new DBUnexpectedError( $this, 'Error in fetchRow(): ' . htmlspecialchars( $this->lastError() ) );
+		}
+		return $row;
+	}
+
+	function numRows( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		@/**/$n = mysql_num_rows( $res );
+		if( $this->lastErrno() ) {
+			throw new DBUnexpectedError( $this, 'Error in numRows(): ' . htmlspecialchars( $this->lastError() ) );
+		}
+		return $n;
+	}
+
+	function numFields( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return mysql_num_fields( $res );
+	}
+
+	function fieldName( $res, $n ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return mysql_field_name( $res, $n );
+	}
+
+	function insertId() { return mysql_insert_id( $this->mConn ); }
+
+	function dataSeek( $res, $row ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return mysql_data_seek( $res, $row );
+	}
+
+	function lastErrno() {
+		if ( $this->mConn ) {
+			return mysql_errno( $this->mConn );
+		} else {
+			return mysql_errno();
+		}
+	}
+
+	function lastError() {
+		if ( $this->mConn ) {
+			# Even if it's non-zero, it can still be invalid
+			wfSuppressWarnings();
+			$error = mysql_error( $this->mConn );
+			if ( !$error ) {
+				$error = mysql_error();
+			}
+			wfRestoreWarnings();
+		} else {
+			$error = mysql_error();
+		}
+		if( $error ) {
+			$error .= ' (' . $this->mServer . ')';
+		}
+		return $error;
+	}
+
+	function affectedRows() { return mysql_affected_rows( $this->mConn ); }
+	
+	/**
+	 * Estimate rows in dataset
+	 * Returns estimated count, based on EXPLAIN output
+	 * Takes same arguments as Database::select()
+	 */
+	public function estimateRowCount( $table, $vars='*', $conds='', $fname = 'Database::estimateRowCount', $options = array() ) {
+		$options['EXPLAIN'] = true;
+		$res = $this->select( $table, $vars, $conds, $fname, $options );
+		if ( $res === false )
+			return false;
+		if ( !$this->numRows( $res ) ) {
+			$this->freeResult($res);
+			return 0;
+		}
+
+		$rows = 1;
+		while( $plan = $this->fetchObject( $res ) ) {
+			$rows *= $plan->rows > 0 ? $plan->rows : 1; // avoid resetting to zero
+		}
+
+		$this->freeResult($res);
+		return $rows;		
+	}
+
+	function fieldInfo( $table, $field ) {
+		$table = $this->tableName( $table );
+		$res = $this->query( "SELECT * FROM $table LIMIT 1" );
+		$n = mysql_num_fields( $res->result );
+		for( $i = 0; $i < $n; $i++ ) {
+			$meta = mysql_fetch_field( $res->result, $i );
+			if( $field == $meta->name ) {
+				return new MySQLField($meta);
+			}
+		}
+		return false;
+	}
+
+	function selectDB( $db ) {
+		$this->mDBname = $db;
+		return mysql_select_db( $db, $this->mConn );
+	}
+
+	function strencode( $s ) {
+		return mysql_real_escape_string( $s, $this->mConn );
+	}
+
+	function ping() {
+		if( !function_exists( 'mysql_ping' ) ) {
+			wfDebug( "Tried to call mysql_ping but this is ancient PHP version. Faking it!\n" );
+			return true;
+		}
+		$ping = mysql_ping( $this->mConn );
+		if ( $ping ) {
+			return true;
+		}
+
+		// Need to reconnect manually in MySQL client 5.0.13+
+		if ( version_compare( mysql_get_client_info(), '5.0.13', '>=' ) ) {
+			mysql_close( $this->mConn );
+			$this->mOpened = false;
+			$this->mConn = false;
+			$this->open( $this->mServer, $this->mUser, $this->mPassword, $this->mDBname );
+			return true;
+		}
+		return false;
+	}
+
+	function getServerVersion() {
+		return mysql_get_server_info( $this->mConn );
+	}
+
+	function useIndexClause( $index ) {
+		return "FORCE INDEX (" . $this->indexName( $index ) . ")";
+	}
+
+	function lowPriorityOption() {
+		return 'LOW_PRIORITY';
+	}
+
+	function getSoftwareLink() {
+		return '[http://www.mysql.com/ MySQL]';
+	}
+
+	function standardSelectDistinct() {
+		return false;
+	}
+
+	public function setTimeout( $timeout ) {
+		$this->query( "SET net_read_timeout=$timeout" );
+		$this->query( "SET net_write_timeout=$timeout" );
+	}
+
+	public function lock( $lockName, $method, $timeout = 5 ) {
+		$lockName = $this->addQuotes( $lockName );
+		$result = $this->query( "SELECT GET_LOCK($lockName, $timeout) AS lockstatus", $method );
+		$row = $this->fetchObject( $result );
+		$this->freeResult( $result );
+
+		if( $row->lockstatus == 1 ) {
+			return true;
+		} else {
+			wfDebug( __METHOD__." failed to acquire lock\n" );
+			return false;
+		}
+	}
+
+	public function unlock( $lockName, $method ) {
+		$lockName = $this->addQuotes( $lockName );
+		$result = $this->query( "SELECT RELEASE_LOCK($lockName) as lockstatus", $method );
+		$row = $this->fetchObject( $result );
+		return $row->lockstatus;
+	}
+
+	public function lockTables( $read, $write, $method, $lowPriority = true ) {
+		$items = array();
+
+		foreach( $write as $table ) {
+			$tbl = $this->tableName( $table ) . 
+					( $lowPriority ? ' LOW_PRIORITY' : '' ) . 
+					' WRITE';
+			$items[] = $tbl;
+		}
+		foreach( $read as $table ) {
+			$items[] = $this->tableName( $table ) . ' READ';
+		}
+		$sql = "LOCK TABLES " . implode( ',', $items );
+		$this->query( $sql, $method );
+	}
+
+	public function unlockTables( $method ) {
+		$this->query( "UNLOCK TABLES", $method );
+	}
+
+	public function setBigSelects( $value = true ) {
+		if ( $value === 'default' ) {
+			if ( $this->mDefaultBigSelects === null ) {
+				# Function hasn't been called before so it must already be set to the default
+				return;
+			} else {
+				$value = $this->mDefaultBigSelects;
+			}
+		} elseif ( $this->mDefaultBigSelects === null ) {
+			$this->mDefaultBigSelects = (bool)$this->selectField( false, '@@sql_big_selects' );
+		}
+		$encValue = $value ? '1' : '0';
+		$this->query( "SET sql_big_selects=$encValue", __METHOD__ );
+	}
+
+	
+	/**
+	 * Determines if the last failure was due to a deadlock
+	 */
+	function wasDeadlock() {
+		return $this->lastErrno() == 1213;
+	}
+
+	/**
+	 * Determines if the last query error was something that should be dealt 
+	 * with by pinging the connection and reissuing the query
+	 */
+	function wasErrorReissuable() {
+		return $this->lastErrno() == 2013 || $this->lastErrno() == 2006;
+	}
+
+	/**
+	 * Determines if the last failure was due to the database being read-only.
+	 */
+	function wasReadOnlyError() {
+		return $this->lastErrno() == 1223 || 
+			( $this->lastErrno() == 1290 && strpos( $this->lastError(), '--read-only' ) !== false );
+	}
+
+	function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseMysql::duplicateTableStructure' ) {
+		$tmp = $temporary ? 'TEMPORARY ' : '';
+		if ( strcmp( $this->getServerVersion(), '4.1' ) < 0 ) {
+			# Hack for MySQL versions < 4.1, which don't support
+			# "CREATE TABLE ... LIKE". Note that
+			# "CREATE TEMPORARY TABLE ... SELECT * FROM ... LIMIT 0"
+			# would not create the indexes we need....
+			#
+			# Note that we don't bother changing around the prefixes here be-
+			# cause we know we're using MySQL anyway.
+
+			$res = $this->query( "SHOW CREATE TABLE $oldName" );
+			$row = $this->fetchRow( $res );
+			$oldQuery = $row[1];
+			$query = preg_replace( '/CREATE TABLE `(.*?)`/', 
+				"CREATE $tmp TABLE `$newName`", $oldQuery );
+			if ($oldQuery === $query) {
+				# Couldn't do replacement
+				throw new MWException( "could not create temporary table $newName" );
+			}
+		} else {
+			$query = "CREATE $tmp TABLE $newName (LIKE $oldName)";
+		}
+		$this->query( $query, $fname );
+	}
+
+}
+
+/**
+ * Legacy support: Database == DatabaseMysql
+ */
+class Database extends DatabaseMysql {}
+
+class MySQLMasterPos {
+	var $file, $pos;
+
+	function __construct( $file, $pos ) {
+		$this->file = $file;
+		$this->pos = $pos;
+	}
+
+	function __toString() {
+		return "{$this->file}/{$this->pos}";
+	}
+}