596 lines
15 KiB
PHP
596 lines
15 KiB
PHP
<?php
|
|
/**
|
|
* This is the MySQL database abstraction layer.
|
|
*
|
|
* @file
|
|
* @ingroup Database
|
|
*/
|
|
|
|
/**
|
|
* 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__ );
|
|
|
|
# Load mysql.so if we don't have it
|
|
wfDl( 'mysql' );
|
|
|
|
# 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 = $dbName;
|
|
|
|
wfProfileIn("dbconnect-$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__ );
|
|
} else {
|
|
$this->query( 'SET NAMES binary', __METHOD__ );
|
|
}
|
|
// Set SQL mode, default is turning them all off, can be overridden or skipped with null
|
|
global $wgSQLMode;
|
|
if ( is_string( $wgSQLMode ) ) {
|
|
$mode = $this->addQuotes( $wgSQLMode );
|
|
$this->query( "SET sql_mode = $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 = 'DatabaseMysql::estimateRowCount', $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;
|
|
}
|
|
|
|
function fieldInfo( $table, $field ) {
|
|
$table = $this->tableName( $table );
|
|
$res = $this->query( "SELECT * FROM $table LIMIT 1", __METHOD__, true );
|
|
if ( !$res ) {
|
|
return false;
|
|
}
|
|
$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;
|
|
}
|
|
|
|
/**
|
|
* Get information about an index into an object
|
|
* Returns false if the index does not exist
|
|
*/
|
|
function indexInfo( $table, $index, $fname = 'DatabaseMysql::indexInfo' ) {
|
|
# 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;
|
|
}
|
|
|
|
function selectDB( $db ) {
|
|
$this->mDBname = $db;
|
|
return mysql_select_db( $db, $this->mConn );
|
|
}
|
|
|
|
function strencode( $s ) {
|
|
$sQuoted = mysql_real_escape_string( $s, $this->mConn );
|
|
|
|
if($sQuoted === false) {
|
|
$this->ping();
|
|
$sQuoted = mysql_real_escape_string( $s, $this->mConn );
|
|
}
|
|
return $sQuoted;
|
|
}
|
|
|
|
function ping() {
|
|
$ping = mysql_ping( $this->mConn );
|
|
if ( $ping ) {
|
|
return true;
|
|
}
|
|
|
|
mysql_close( $this->mConn );
|
|
$this->mOpened = false;
|
|
$this->mConn = false;
|
|
$this->open( $this->mServer, $this->mUser, $this->mPassword, $this->mDBname );
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns slave lag.
|
|
* At the moment, this will only work if the DB user has the PROCESS privilege
|
|
* @result int
|
|
*/
|
|
function getLag() {
|
|
if ( !is_null( $this->mFakeSlaveLag ) ) {
|
|
wfDebug( "getLag: fake slave lagged {$this->mFakeSlaveLag} seconds\n" );
|
|
return $this->mFakeSlaveLag;
|
|
}
|
|
$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;
|
|
}
|
|
|
|
function getServerVersion() {
|
|
return mysql_get_server_info( $this->mConn );
|
|
}
|
|
|
|
function useIndexClause( $index ) {
|
|
return "FORCE INDEX (" . $this->indexName( $index ) . ")";
|
|
}
|
|
|
|
function lowPriorityOption() {
|
|
return 'LOW_PRIORITY';
|
|
}
|
|
|
|
public static 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 );
|
|
|
|
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
|
|
*/
|
|
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 );
|
|
}
|
|
|
|
/**
|
|
* 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';
|
|
}
|
|
|
|
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__ );
|
|
}
|
|
|
|
public function unixTimestamp( $field ) {
|
|
return "UNIX_TIMESTAMP($field)";
|
|
}
|
|
|
|
/**
|
|
* 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 {}
|
|
|
|
/**
|
|
* Utility class.
|
|
* @ingroup Database
|
|
*/
|
|
class MySQLField implements Field {
|
|
private $name, $tablename, $default, $max_length, $nullable,
|
|
$is_pk, $is_unique, $is_multiple, $is_key, $type;
|
|
|
|
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;
|
|
}
|
|
|
|
function name() {
|
|
return $this->name;
|
|
}
|
|
|
|
function tableName() {
|
|
return $this->tableName;
|
|
}
|
|
|
|
function type() {
|
|
return $this->type;
|
|
}
|
|
|
|
function isNullable() {
|
|
return $this->nullable;
|
|
}
|
|
|
|
function defaultValue() {
|
|
return $this->default;
|
|
}
|
|
|
|
function isKey() {
|
|
return $this->is_key;
|
|
}
|
|
|
|
function isMultipleKey() {
|
|
return $this->is_multiple;
|
|
}
|
|
}
|
|
|
|
class MySQLMasterPos {
|
|
var $file, $pos;
|
|
|
|
function __construct( $file, $pos ) {
|
|
$this->file = $file;
|
|
$this->pos = $pos;
|
|
}
|
|
|
|
function __toString() {
|
|
return "{$this->file}/{$this->pos}";
|
|
}
|
|
}
|