Merge branch 'archwiki'

Conflicts: extensions/FluxBBAuthPlugin.php extensions/SyntaxHighlight_GeSHi/README extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.class.php extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.i18n.php extensions/SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.php extensions/SyntaxHighlight_GeSHi/geshi/docs/CHANGES extensions/SyntaxHighlight_GeSHi/geshi/docs/THANKS extensions/SyntaxHighlight_GeSHi/geshi/docs/TODO extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractClass.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractClass_logo.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractMethod.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateClass.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateClass_logo.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/AbstractPrivateMethod.png extensions/SyntaxHighlight_GeSHi/geshi/docs/api/media/images/Class.png 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extensions/SyntaxHighlight_GeSHi/geshi/geshi/vala.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/vb.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/vbnet.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/verilog.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/vhdl.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/vim.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/visualfoxpro.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/visualprolog.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/whitespace.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/whois.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/winbatch.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/xbasic.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/xml.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/xorg_conf.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/xpp.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/yaml.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/z80.php extensions/SyntaxHighlight_GeSHi/geshi/geshi/zxbasic.php
author: Luke Shumaker <LukeShu@sbcglobal.net> 2014-01-28 09:50:25 -0500
committer: Luke Shumaker <LukeShu@sbcglobal.net> 2014-01-28 09:50:25 -0500
commit: 5744df39e15f85c6cc8a9faf8924d77e76d2b216 (patch)
tree: a8c8dd40a94d1fa0d5377566aa5548ae55a163da /includes/db/DatabaseMysqlBase.php
parent: 4bb2aeca1d198391ca856aa16c40b8559c68daec (diff)
parent: 224b22a051051f6c2e494c3a2fb4adb42898e2d1 (diff)
1 files changed, 1161 insertions, 0 deletions
diff --git a/includes/db/DatabaseMysqlBase.php b/includes/db/DatabaseMysqlBase.php
new file mode 100644
index 00000000..8f12b92d
--- /dev/null
+++ b/includes/db/DatabaseMysqlBase.php
@@ -0,0 +1,1161 @@
+<?php
+/**
+ * This is the MySQL database abstraction layer.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Database
+ */
+
+/**
+ * Database abstraction object for MySQL.
+ * Defines methods independent on used MySQL extension.
+ *
+ * @ingroup Database
+ * @since 1.22
+ * @see Database
+ */
+abstract class DatabaseMysqlBase extends DatabaseBase {
+	/** @var MysqlMasterPos */
+	protected $lastKnownSlavePos;
+
+	/**
+	 * @return string
+	 */
+	function getType() {
+		return 'mysql';
+	}
+
+	/**
+	 * @param $server string
+	 * @param $user string
+	 * @param $password string
+	 * @param $dbName string
+	 * @return bool
+	 * @throws DBConnectionError
+	 */
+	function open( $server, $user, $password, $dbName ) {
+		global $wgAllDBsAreLocalhost, $wgDBmysql5, $wgSQLMode;
+		wfProfileIn( __METHOD__ );
+
+		# Debugging hack -- fake cluster
+		if ( $wgAllDBsAreLocalhost ) {
+			$realServer = 'localhost';
+		} else {
+			$realServer = $server;
+		}
+		$this->close();
+		$this->mServer = $server;
+		$this->mUser = $user;
+		$this->mPassword = $password;
+		$this->mDBname = $dbName;
+
+		wfProfileIn( "dbconnect-$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;
+		$this->installErrorHandler();
+		try {
+			$this->mConn = $this->mysqlConnect( $realServer );
+		} catch ( Exception $ex ) {
+			wfProfileOut( "dbconnect-$server" );
+			wfProfileOut( __METHOD__ );
+			throw $ex;
+		}
+		$error = $this->restoreErrorHandler();
+
+		wfProfileOut( "dbconnect-$server" );
+
+		# Always log connection errors
+		if ( !$this->mConn ) {
+			if ( !$error ) {
+				$error = $this->lastError();
+			}
+			wfLogDBError( "Error connecting to {$this->mServer}: $error\n" );
+			wfDebug( "DB connection error\n" .
+				"Server: $server, User: $user, Password: " .
+				substr( $password, 0, 3 ) . "..., error: " . $error . "\n" );
+
+			wfProfileOut( __METHOD__ );
+			return $this->reportConnectionError( $error );
+		}
+
+		if ( $dbName != '' ) {
+			wfSuppressWarnings();
+			$success = $this->selectDB( $dbName );
+			wfRestoreWarnings();
+			if ( !$success ) {
+				wfLogDBError( "Error selecting database $dbName on server {$this->mServer}\n" );
+				wfDebug( "Error selecting database $dbName on server {$this->mServer} " .
+					"from client host " . wfHostname() . "\n" );
+
+				wfProfileOut( __METHOD__ );
+				return $this->reportConnectionError( "Error selecting database $dbName" );
+			}
+		}
+
+		// Tell the server we're communicating with it in UTF-8.
+		// This may engage various charset conversions.
+		if ( $wgDBmysql5 ) {
+			$this->query( 'SET NAMES utf8', __METHOD__ );
+		} else {
+			$this->query( 'SET NAMES binary', __METHOD__ );
+		}
+		// Set SQL mode, default is turning them all off, can be overridden or skipped with null
+		if ( is_string( $wgSQLMode ) ) {
+			$mode = $this->addQuotes( $wgSQLMode );
+			$this->query( "SET sql_mode = $mode", __METHOD__ );
+		}
+
+		$this->mOpened = true;
+		wfProfileOut( __METHOD__ );
+		return true;
+	}
+
+	/**
+	 * Open a connection to a MySQL server
+	 *
+	 * @param $realServer string
+	 * @return mixed Raw connection
+	 * @throws DBConnectionError
+	 */
+	abstract protected function mysqlConnect( $realServer );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @throws DBUnexpectedError
+	 */
+	function freeResult( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		wfSuppressWarnings();
+		$ok = $this->mysqlFreeResult( $res );
+		wfRestoreWarnings();
+		if ( !$ok ) {
+			throw new DBUnexpectedError( $this, "Unable to free MySQL result" );
+		}
+	}
+
+	/**
+	 * Free result memory
+	 *
+	 * @param $res Raw result
+	 * @return bool
+	 */
+	abstract protected function mysqlFreeResult( $res );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @return object|bool
+	 * @throws DBUnexpectedError
+	 */
+	function fetchObject( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		wfSuppressWarnings();
+		$row = $this->mysqlFetchObject( $res );
+		wfRestoreWarnings();
+
+		$errno = $this->lastErrno();
+		// Unfortunately, mysql_fetch_object does not reset the last errno.
+		// Only check for CR_SERVER_LOST and CR_UNKNOWN_ERROR, as
+		// these are the only errors mysql_fetch_object can cause.
+		// See http://dev.mysql.com/doc/refman/5.0/en/mysql-fetch-row.html.
+		if ( $errno == 2000 || $errno == 2013 ) {
+			throw new DBUnexpectedError( $this, 'Error in fetchObject(): ' . htmlspecialchars( $this->lastError() ) );
+		}
+		return $row;
+	}
+
+	/**
+	 * Fetch a result row as an object
+	 *
+	 * @param $res Raw result
+	 * @return stdClass
+	 */
+	abstract protected function mysqlFetchObject( $res );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @return array|bool
+	 * @throws DBUnexpectedError
+	 */
+	function fetchRow( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		wfSuppressWarnings();
+		$row = $this->mysqlFetchArray( $res );
+		wfRestoreWarnings();
+
+		$errno = $this->lastErrno();
+		// Unfortunately, mysql_fetch_array does not reset the last errno.
+		// Only check for CR_SERVER_LOST and CR_UNKNOWN_ERROR, as
+		// these are the only errors mysql_fetch_array can cause.
+		// See http://dev.mysql.com/doc/refman/5.0/en/mysql-fetch-row.html.
+		if ( $errno == 2000 || $errno == 2013 ) {
+			throw new DBUnexpectedError( $this, 'Error in fetchRow(): ' . htmlspecialchars( $this->lastError() ) );
+		}
+		return $row;
+	}
+
+	/**
+	 * Fetch a result row as an associative and numeric array
+	 *
+	 * @param $res Raw result
+	 * @return array
+	 */
+	abstract protected function mysqlFetchArray( $res );
+
+	/**
+	 * @throws DBUnexpectedError
+	 * @param $res ResultWrapper
+	 * @return int
+	 */
+	function numRows( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		wfSuppressWarnings();
+		$n = $this->mysqlNumRows( $res );
+		wfRestoreWarnings();
+		// Unfortunately, mysql_num_rows does not reset the last errno.
+		// We are not checking for any errors here, since
+		// these are no errors mysql_num_rows can cause.
+		// See http://dev.mysql.com/doc/refman/5.0/en/mysql-fetch-row.html.
+		// See https://bugzilla.wikimedia.org/42430
+		return $n;
+	}
+
+	/**
+	 * Get number of rows in result
+	 *
+	 * @param $res Raw result
+	 * @return int
+	 */
+	abstract protected function mysqlNumRows( $res );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @return int
+	 */
+	function numFields( $res ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return $this->mysqlNumFields( $res );
+	}
+
+	/**
+	 * Get number of fields in result
+	 *
+	 * @param $res Raw result
+	 * @return int
+	 */
+	abstract protected function mysqlNumFields( $res );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @param $n string
+	 * @return string
+	 */
+	function fieldName( $res, $n ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return $this->mysqlFieldName( $res, $n );
+	}
+
+	/**
+	 * Get the name of the specified field in a result
+	 *
+	 * @param $res Raw result
+	 * @param $n int
+	 * @return string
+	 */
+	abstract protected function mysqlFieldName( $res, $n );
+
+	/**
+	 * @param $res ResultWrapper
+	 * @param $row
+	 * @return bool
+	 */
+	function dataSeek( $res, $row ) {
+		if ( $res instanceof ResultWrapper ) {
+			$res = $res->result;
+		}
+		return $this->mysqlDataSeek( $res, $row );
+	}
+
+	/**
+	 * Move internal result pointer
+	 *
+	 * @param $res Raw result
+	 * @param $row int
+	 * @return bool
+	 */
+	abstract protected function mysqlDataSeek( $res, $row );
+
+	/**
+	 * @return string
+	 */
+	function lastError() {
+		if ( $this->mConn ) {
+			# Even if it's non-zero, it can still be invalid
+			wfSuppressWarnings();
+			$error = $this->mysqlError( $this->mConn );
+			if ( !$error ) {
+				$error = $this->mysqlError();
+			}
+			wfRestoreWarnings();
+		} else {
+			$error = $this->mysqlError();
+		}
+		if ( $error ) {
+			$error .= ' (' . $this->mServer . ')';
+		}
+		return $error;
+	}
+
+	/**
+	 * Returns the text of the error message from previous MySQL operation
+	 *
+	 * @param $conn Raw connection
+	 * @return string
+	 */
+	abstract protected function mysqlError( $conn = null );
+
+	/**
+	 * @param $table string
+	 * @param $uniqueIndexes
+	 * @param $rows array
+	 * @param $fname string
+	 * @return ResultWrapper
+	 */
+	function replace( $table, $uniqueIndexes, $rows, $fname = __METHOD__ ) {
+		return $this->nativeReplace( $table, $rows, $fname );
+	}
+
+	/**
+	 * Estimate rows in dataset
+	 * Returns estimated count, based on EXPLAIN output
+	 * Takes same arguments as Database::select()
+	 *
+	 * @param $table string|array
+	 * @param $vars string|array
+	 * @param $conds string|array
+	 * @param $fname string
+	 * @param $options string|array
+	 * @return int
+	 */
+	public function estimateRowCount( $table, $vars = '*', $conds = '', $fname = __METHOD__, $options = array() ) {
+		$options['EXPLAIN'] = true;
+		$res = $this->select( $table, $vars, $conds, $fname, $options );
+		if ( $res === false ) {
+			return false;
+		}
+		if ( !$this->numRows( $res ) ) {
+			return 0;
+		}
+
+		$rows = 1;
+		foreach ( $res as $plan ) {
+			$rows *= $plan->rows > 0 ? $plan->rows : 1; // avoid resetting to zero
+		}
+		return $rows;
+	}
+
+	/**
+	 * @param $table string
+	 * @param $field string
+	 * @return bool|MySQLField
+	 */
+	function fieldInfo( $table, $field ) {
+		$table = $this->tableName( $table );
+		$res = $this->query( "SELECT * FROM $table LIMIT 1", __METHOD__, true );
+		if ( !$res ) {
+			return false;
+		}
+		$n = $this->mysqlNumFields( $res->result );
+		for ( $i = 0; $i < $n; $i++ ) {
+			$meta = $this->mysqlFetchField( $res->result, $i );
+			if ( $field == $meta->name ) {
+				return new MySQLField( $meta );
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Get column information from a result
+	 *
+	 * @param $res Raw result
+	 * @param $n int
+	 * @return stdClass
+	 */
+	abstract protected function mysqlFetchField( $res, $n );
+
+	/**
+	 * Get information about an index into an object
+	 * Returns false if the index does not exist
+	 *
+	 * @param $table string
+	 * @param $index string
+	 * @param $fname string
+	 * @return bool|array|null False or null on failure
+	 */
+	function indexInfo( $table, $index, $fname = __METHOD__ ) {
+		# SHOW INDEX works in MySQL 3.23.58, but SHOW INDEXES does not.
+		# SHOW INDEX should work for 3.x and up:
+		# http://dev.mysql.com/doc/mysql/en/SHOW_INDEX.html
+		$table = $this->tableName( $table );
+		$index = $this->indexName( $index );
+
+		$sql = 'SHOW INDEX FROM ' . $table;
+		$res = $this->query( $sql, $fname );
+
+		if ( !$res ) {
+			return null;
+		}
+
+		$result = array();
+
+		foreach ( $res as $row ) {
+			if ( $row->Key_name == $index ) {
+				$result[] = $row;
+			}
+		}
+		return empty( $result ) ? false : $result;
+	}
+
+	/**
+	 * @param $s string
+	 *
+	 * @return string
+	 */
+	function strencode( $s ) {
+		$sQuoted = $this->mysqlRealEscapeString( $s );
+
+		if ( $sQuoted === false ) {
+			$this->ping();
+			$sQuoted = $this->mysqlRealEscapeString( $s );
+		}
+		return $sQuoted;
+	}
+
+	/**
+	 * MySQL uses `backticks` for identifier quoting instead of the sql standard "double quotes".
+	 *
+	 * @param $s string
+	 *
+	 * @return string
+	 */
+	public function addIdentifierQuotes( $s ) {
+		// Characters in the range \u0001-\uFFFF are valid in a quoted identifier
+		// Remove NUL bytes and escape backticks by doubling
+		return '`' . str_replace( array( "\0", '`' ), array( '', '``' ), $s )  . '`';
+	}
+
+	/**
+	 * @param $name string
+	 * @return bool
+	 */
+	public function isQuotedIdentifier( $name ) {
+		return strlen( $name ) && $name[0] == '`' && substr( $name, -1, 1 ) == '`';
+	}
+
+	/**
+	 * @return bool
+	 */
+	function ping() {
+		$ping = $this->mysqlPing();
+		if ( $ping ) {
+			return true;
+		}
+
+		$this->closeConnection();
+		$this->mOpened = false;
+		$this->mConn = false;
+		$this->open( $this->mServer, $this->mUser, $this->mPassword, $this->mDBname );
+		return true;
+	}
+
+	/**
+	 * Ping a server connection or reconnect if there is no connection
+	 *
+	 * @return bool
+	 */
+	abstract protected function mysqlPing();
+
+	/**
+	 * Returns slave lag.
+	 *
+	 * This will do a SHOW SLAVE STATUS
+	 *
+	 * @return int
+	 */
+	function getLag() {
+		if ( !is_null( $this->mFakeSlaveLag ) ) {
+			wfDebug( "getLag: fake slave lagged {$this->mFakeSlaveLag} seconds\n" );
+			return $this->mFakeSlaveLag;
+		}
+
+		return $this->getLagFromSlaveStatus();
+	}
+
+	/**
+	 * @return bool|int
+	 */
+	function getLagFromSlaveStatus() {
+		$res = $this->query( 'SHOW SLAVE STATUS', __METHOD__ );
+		if ( !$res ) {
+			return false;
+		}
+		$row = $res->fetchObject();
+		if ( !$row ) {
+			return false;
+		}
+		if ( strval( $row->Seconds_Behind_Master ) === '' ) {
+			return false;
+		} else {
+			return intval( $row->Seconds_Behind_Master );
+		}
+	}
+
+	/**
+	 * @deprecated in 1.19, use getLagFromSlaveStatus
+	 *
+	 * @return bool|int
+	 */
+	function getLagFromProcesslist() {
+		wfDeprecated( __METHOD__, '1.19' );
+		$res = $this->query( 'SHOW PROCESSLIST', __METHOD__ );
+		if ( !$res ) {
+			return false;
+		}
+		# Find slave SQL thread
+		foreach ( $res as $row ) {
+			/* This should work for most situations - when default db
+			 * for thread is not specified, it had no events executed,
+			 * and therefore it doesn't know yet how lagged it is.
+			 *
+			 * Relay log I/O thread does not select databases.
+			 */
+			if ( $row->User == 'system user' &&
+				$row->State != 'Waiting for master to send event' &&
+				$row->State != 'Connecting to master' &&
+				$row->State != 'Queueing master event to the relay log' &&
+				$row->State != 'Waiting for master update' &&
+				$row->State != 'Requesting binlog dump' &&
+				$row->State != 'Waiting to reconnect after a failed master event read' &&
+				$row->State != 'Reconnecting after a failed master event read' &&
+				$row->State != 'Registering slave on master'
+				) {
+				# This is it, return the time (except -ve)
+				if ( $row->Time > 0x7fffffff ) {
+					return false;
+				} else {
+					return $row->Time;
+				}
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Wait for the slave to catch up to a given master position.
+	 * @TODO: return values for this and base class are rubbish
+	 *
+	 * @param $pos DBMasterPos object
+	 * @param $timeout Integer: the maximum number of seconds to wait for synchronisation
+	 * @return bool|string
+	 */
+	function masterPosWait( DBMasterPos $pos, $timeout ) {
+		if ( $this->lastKnownSlavePos && $this->lastKnownSlavePos->hasReached( $pos ) ) {
+			return '0'; // http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html
+		}
+
+		wfProfileIn( __METHOD__ );
+		# Commit any open transactions
+		$this->commit( __METHOD__, 'flush' );
+
+		if ( !is_null( $this->mFakeSlaveLag ) ) {
+			$status = parent::masterPosWait( $pos, $timeout );
+			wfProfileOut( __METHOD__ );
+			return $status;
+		}
+
+		# Call doQuery() directly, to avoid opening a transaction if DBO_TRX is set
+		$encFile = $this->addQuotes( $pos->file );
+		$encPos = intval( $pos->pos );
+		$sql = "SELECT MASTER_POS_WAIT($encFile, $encPos, $timeout)";
+		$res = $this->doQuery( $sql );
+
+		$status = false;
+		if ( $res && $row = $this->fetchRow( $res ) ) {
+			$status = $row[0]; // can be NULL, -1, or 0+ per the MySQL manual
+			if ( ctype_digit( $status ) ) { // success
+				$this->lastKnownSlavePos = $pos;
+			}
+		}
+
+		wfProfileOut( __METHOD__ );
+		return $status;
+	}
+
+	/**
+	 * Get the position of the master from SHOW SLAVE STATUS
+	 *
+	 * @return MySQLMasterPos|bool
+	 */
+	function getSlavePos() {
+		if ( !is_null( $this->mFakeSlaveLag ) ) {
+			return parent::getSlavePos();
+		}
+
+		$res = $this->query( 'SHOW SLAVE STATUS', 'DatabaseBase::getSlavePos' );
+		$row = $this->fetchObject( $res );
+
+		if ( $row ) {
+			$pos = isset( $row->Exec_master_log_pos ) ? $row->Exec_master_log_pos : $row->Exec_Master_Log_Pos;
+			return new MySQLMasterPos( $row->Relay_Master_Log_File, $pos );
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Get the position of the master from SHOW MASTER STATUS
+	 *
+	 * @return MySQLMasterPos|bool
+	 */
+	function getMasterPos() {
+		if ( $this->mFakeMaster ) {
+			return parent::getMasterPos();
+		}
+
+		$res = $this->query( 'SHOW MASTER STATUS', 'DatabaseBase::getMasterPos' );
+		$row = $this->fetchObject( $res );
+
+		if ( $row ) {
+			return new MySQLMasterPos( $row->File, $row->Position );
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * @param $index
+	 * @return string
+	 */
+	function useIndexClause( $index ) {
+		return "FORCE INDEX (" . $this->indexName( $index ) . ")";
+	}
+
+	/**
+	 * @return string
+	 */
+	function lowPriorityOption() {
+		return 'LOW_PRIORITY';
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getSoftwareLink() {
+		$version = $this->getServerVersion();
+		if ( strpos( $version, 'MariaDB' ) !== false ) {
+			return '[{{int:version-db-mariadb-url}} MariaDB]';
+		} elseif ( strpos( $version, 'percona' ) !== false ) {
+			return '[{{int:version-db-percona-url}} Percona Server]';
+		} else {
+			return '[{{int:version-db-mysql-url}} MySQL]';
+		}
+	}
+
+	/**
+	 * @param $options array
+	 */
+	public function setSessionOptions( array $options ) {
+		if ( isset( $options['connTimeout'] ) ) {
+			$timeout = (int)$options['connTimeout'];
+			$this->query( "SET net_read_timeout=$timeout" );
+			$this->query( "SET net_write_timeout=$timeout" );
+		}
+	}
+
+	public function streamStatementEnd( &$sql, &$newLine ) {
+		if ( strtoupper( substr( $newLine, 0, 9 ) ) == 'DELIMITER' ) {
+			preg_match( '/^DELIMITER\s+(\S+)/', $newLine, $m );
+			$this->delimiter = $m[1];
+			$newLine = '';
+		}
+		return parent::streamStatementEnd( $sql, $newLine );
+	}
+
+	/**
+	 * Check to see if a named lock is available. This is non-blocking.
+	 *
+	 * @param string $lockName name of lock to poll
+	 * @param string $method name of method calling us
+	 * @return Boolean
+	 * @since 1.20
+	 */
+	public function lockIsFree( $lockName, $method ) {
+		$lockName = $this->addQuotes( $lockName );
+		$result = $this->query( "SELECT IS_FREE_LOCK($lockName) AS lockstatus", $method );
+		$row = $this->fetchObject( $result );
+		return ( $row->lockstatus == 1 );
+	}
+
+	/**
+	 * @param $lockName string
+	 * @param $method string
+	 * @param $timeout int
+	 * @return bool
+	 */
+	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 );
+
+		if ( $row->lockstatus == 1 ) {
+			return true;
+		} else {
+			wfDebug( __METHOD__ . " failed to acquire lock\n" );
+			return false;
+		}
+	}
+
+	/**
+	 * FROM MYSQL DOCS: http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_release-lock
+	 * @param $lockName string
+	 * @param $method string
+	 * @return bool
+	 */
+	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 == 1 );
+	}
+
+	/**
+	 * @param $read array
+	 * @param $write array
+	 * @param $method string
+	 * @param $lowPriority bool
+	 * @return bool
+	 */
+	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 );
+		return true;
+	}
+
+	/**
+	 * @param $method string
+	 * @return bool
+	 */
+	public function unlockTables( $method ) {
+		$this->query( "UNLOCK TABLES", $method );
+		return true;
+	}
+
+	/**
+	 * Get search engine class. All subclasses of this
+	 * need to implement this if they wish to use searching.
+	 *
+	 * @return String
+	 */
+	public function getSearchEngine() {
+		return 'SearchMySQL';
+	}
+
+	/**
+	 * @param bool $value
+	 * @return mixed
+	 */
+	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__ );
+	}
+
+	/**
+	 * DELETE where the condition is a join. MySql uses multi-table deletes.
+	 * @param $delTable string
+	 * @param $joinTable string
+	 * @param $delVar string
+	 * @param $joinVar string
+	 * @param $conds array|string
+	 * @param bool|string $fname bool
+	 * @throws DBUnexpectedError
+	 * @return bool|ResultWrapper
+	 */
+	function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = __METHOD__ ) {
+		if ( !$conds ) {
+			throw new DBUnexpectedError( $this, 'DatabaseBase::deleteJoin() called with empty $conds' );
+		}
+
+		$delTable = $this->tableName( $delTable );
+		$joinTable = $this->tableName( $joinTable );
+		$sql = "DELETE $delTable FROM $delTable, $joinTable WHERE $delVar=$joinVar ";
+
+		if ( $conds != '*' ) {
+			$sql .= ' AND ' . $this->makeList( $conds, LIST_AND );
+		}
+
+		return $this->query( $sql, $fname );
+	}
+
+	/**
+	 * @param string $table
+	 * @param array $rows
+	 * @param array $uniqueIndexes
+	 * @param array $set
+	 * @param string $fname
+	 * @param array $options
+	 * @return bool
+	 */
+	public function upsert(
+		$table, array $rows, array $uniqueIndexes, array $set, $fname = __METHOD__
+	) {
+		if ( !count( $rows ) ) {
+			return true; // nothing to do
+		}
+		$rows = is_array( reset( $rows ) ) ? $rows : array( $rows );
+
+		$table = $this->tableName( $table );
+		$columns = array_keys( $rows[0] );
+
+		$sql = "INSERT INTO $table (" . implode( ',', $columns ) . ') VALUES ';
+		$rowTuples = array();
+		foreach ( $rows as $row ) {
+			$rowTuples[] = '(' . $this->makeList( $row ) . ')';
+		}
+		$sql .= implode( ',', $rowTuples );
+		$sql .= " ON DUPLICATE KEY UPDATE " . $this->makeList( $set, LIST_SET );
+
+		return (bool)$this->query( $sql, $fname );
+	}
+
+	/**
+	 * Determines how long the server has been up
+	 *
+	 * @return int
+	 */
+	function getServerUptime() {
+		$vars = $this->getMysqlStatus( 'Uptime' );
+		return (int)$vars['Uptime'];
+	}
+
+	/**
+	 * Determines if the last failure was due to a deadlock
+	 *
+	 * @return bool
+	 */
+	function wasDeadlock() {
+		return $this->lastErrno() == 1213;
+	}
+
+	/**
+	 * Determines if the last failure was due to a lock timeout
+	 *
+	 * @return bool
+	 */
+	function wasLockTimeout() {
+		return $this->lastErrno() == 1205;
+	}
+
+	/**
+	 * Determines if the last query error was something that should be dealt
+	 * with by pinging the connection and reissuing the query
+	 *
+	 * @return bool
+	 */
+	function wasErrorReissuable() {
+		return $this->lastErrno() == 2013 || $this->lastErrno() == 2006;
+	}
+
+	/**
+	 * Determines if the last failure was due to the database being read-only.
+	 *
+	 * @return bool
+	 */
+	function wasReadOnlyError() {
+		return $this->lastErrno() == 1223 ||
+			( $this->lastErrno() == 1290 && strpos( $this->lastError(), '--read-only' ) !== false );
+	}
+
+	/**
+	 * @param $oldName
+	 * @param $newName
+	 * @param $temporary bool
+	 * @param $fname string
+	 */
+	function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = __METHOD__ ) {
+		$tmp = $temporary ? 'TEMPORARY ' : '';
+		$newName = $this->addIdentifierQuotes( $newName );
+		$oldName = $this->addIdentifierQuotes( $oldName );
+		$query = "CREATE $tmp TABLE $newName (LIKE $oldName)";
+		$this->query( $query, $fname );
+	}
+
+	/**
+	 * List all tables on the database
+	 *
+	 * @param string $prefix Only show tables with this prefix, e.g. mw_
+	 * @param string $fname calling function name
+	 * @return array
+	 */
+	function listTables( $prefix = null, $fname = __METHOD__ ) {
+		$result = $this->query( "SHOW TABLES", $fname );
+
+		$endArray = array();
+
+		foreach ( $result as $table ) {
+			$vars = get_object_vars( $table );
+			$table = array_pop( $vars );
+
+			if ( !$prefix || strpos( $table, $prefix ) === 0 ) {
+				$endArray[] = $table;
+			}
+		}
+
+		return $endArray;
+	}
+
+	/**
+	 * @param $tableName
+	 * @param $fName string
+	 * @return bool|ResultWrapper
+	 */
+	public function dropTable( $tableName, $fName = __METHOD__ ) {
+		if ( !$this->tableExists( $tableName, $fName ) ) {
+			return false;
+		}
+		return $this->query( "DROP TABLE IF EXISTS " . $this->tableName( $tableName ), $fName );
+	}
+
+	/**
+	 * @return array
+	 */
+	protected function getDefaultSchemaVars() {
+		$vars = parent::getDefaultSchemaVars();
+		$vars['wgDBTableOptions'] = str_replace( 'TYPE', 'ENGINE', $GLOBALS['wgDBTableOptions'] );
+		$vars['wgDBTableOptions'] = str_replace( 'CHARSET=mysql4', 'CHARSET=binary', $vars['wgDBTableOptions'] );
+		return $vars;
+	}
+
+	/**
+	 * Get status information from SHOW STATUS in an associative array
+	 *
+	 * @param $which string
+	 * @return array
+	 */
+	function getMysqlStatus( $which = "%" ) {
+		$res = $this->query( "SHOW STATUS LIKE '{$which}'" );
+		$status = array();
+
+		foreach ( $res as $row ) {
+			$status[$row->Variable_name] = $row->Value;
+		}
+
+		return $status;
+	}
+
+	/**
+	 * Lists VIEWs in the database
+	 *
+	 * @param string $prefix   Only show VIEWs with this prefix, eg.
+	 * unit_test_, or $wgDBprefix. Default: null, would return all views.
+	 * @param string $fname    Name of calling function
+	 * @return array
+	 * @since 1.22
+	 */
+	public function listViews( $prefix = null, $fname = __METHOD__ ) {
+
+		if ( !isset( $this->allViews ) ) {
+
+			// The name of the column containing the name of the VIEW
+			$propertyName = 'Tables_in_' . $this->mDBname;
+
+			// Query for the VIEWS
+			$result = $this->query( 'SHOW FULL TABLES WHERE TABLE_TYPE = "VIEW"' );
+			$this->allViews = array();
+			while ( ($row = $this->fetchRow($result)) !== false ) {
+				array_push( $this->allViews, $row[$propertyName] );
+			}
+		}
+
+		if ( is_null($prefix) || $prefix === '' ) {
+			return $this->allViews;
+		}
+
+		$filteredViews = array();
+		foreach ( $this->allViews as $viewName ) {
+			// Does the name of this VIEW start with the table-prefix?
+			if ( strpos( $viewName, $prefix ) === 0 ) {
+				array_push( $filteredViews, $viewName );
+			}
+		}
+		return $filteredViews;
+	}
+
+	/**
+	 * Differentiates between a TABLE and a VIEW.
+	 *
+	 * @param $name string: Name of the TABLE/VIEW to test
+	 * @return bool
+	 * @since 1.22
+	 */
+	public function isView( $name, $prefix = null ) {
+		return in_array( $name, $this->listViews( $prefix ) );
+	}
+
+}
+
+
+
+/**
+ * Utility class.
+ * @ingroup Database
+ */
+class MySQLField implements Field {
+	private $name, $tablename, $default, $max_length, $nullable,
+		$is_pk, $is_unique, $is_multiple, $is_key, $type, $binary;
+
+	function __construct( $info ) {
+		$this->name = $info->name;
+		$this->tablename = $info->table;
+		$this->default = $info->def;
+		$this->max_length = $info->max_length;
+		$this->nullable = !$info->not_null;
+		$this->is_pk = $info->primary_key;
+		$this->is_unique = $info->unique_key;
+		$this->is_multiple = $info->multiple_key;
+		$this->is_key = ( $this->is_pk || $this->is_unique || $this->is_multiple );
+		$this->type = $info->type;
+		$this->binary = isset( $info->binary ) ? $info->binary : false;
+	}
+
+	/**
+	 * @return string
+	 */
+	function name() {
+		return $this->name;
+	}
+
+	/**
+	 * @return string
+	 */
+	function tableName() {
+		return $this->tableName;
+	}
+
+	/**
+	 * @return string
+	 */
+	function type() {
+		return $this->type;
+	}
+
+	/**
+	 * @return bool
+	 */
+	function isNullable() {
+		return $this->nullable;
+	}
+
+	function defaultValue() {
+		return $this->default;
+	}
+
+	/**
+	 * @return bool
+	 */
+	function isKey() {
+		return $this->is_key;
+	}
+
+	/**
+	 * @return bool
+	 */
+	function isMultipleKey() {
+		return $this->is_multiple;
+	}
+
+	function isBinary() {
+		return $this->binary;
+	}
+}
+
+class MySQLMasterPos implements DBMasterPos {
+	var $file, $pos;
+
+	function __construct( $file, $pos ) {
+		$this->file = $file;
+		$this->pos = $pos;
+	}
+
+	function __toString() {
+		// e.g db1034-bin.000976/843431247
+		return "{$this->file}/{$this->pos}";
+	}
+
+	/**
+	 * @return array|false (int, int)
+	 */
+	protected function getCoordinates() {
+		$m = array();
+		if ( preg_match( '!\.(\d+)/(\d+)$!', (string)$this, $m ) ) {
+			return array( (int)$m[1], (int)$m[2] );
+		}
+		return false;
+	}
+
+	function hasReached( MySQLMasterPos $pos ) {
+		$thisPos = $this->getCoordinates();
+		$thatPos = $pos->getCoordinates();
+		return ( $thisPos && $thatPos && $thisPos >= $thatPos );
+	}
+}
author	Luke Shumaker <LukeShu@sbcglobal.net>	2014-01-28 09:50:25 -0500
committer	Luke Shumaker <LukeShu@sbcglobal.net>	2014-01-28 09:50:25 -0500
commit	5744df39e15f85c6cc8a9faf8924d77e76d2b216 (patch)
tree	a8c8dd40a94d1fa0d5377566aa5548ae55a163da /includes/db/DatabaseMysqlBase.php
parent	4bb2aeca1d198391ca856aa16c40b8559c68daec (diff)
parent	224b22a051051f6c2e494c3a2fb4adb42898e2d1 (diff)