/**
* This file deals with MySQL interface functions
* and query specifics/optimisations
- * @package MediaWiki
*/
-/**
- * Depends on the CacheManager
- */
-require_once( 'CacheManager.php' );
-
-/** See Database::makeList() */
-define( 'LIST_COMMA', 0 );
-define( 'LIST_AND', 1 );
-define( 'LIST_SET', 2 );
-define( 'LIST_NAMES', 3);
-define( 'LIST_OR', 4);
-
/** Number of times to re-try an operation in case of deadlock */
define( 'DEADLOCK_TRIES', 4 );
/** Minimum time to wait before retry, in microseconds */
/** Maximum time to wait before retry */
define( 'DEADLOCK_DELAY_MAX', 1500000 );
+/******************************************************************************
+ * Utility classes
+ *****************************************************************************/
+
+/**
+ * Utility class.
+ * @addtogroup Database
+ */
class DBObject {
- var $mData;
+ public $mData;
function DBObject($data) {
$this->mData = $data;
}
};
+/**
+ * Utility class
+ * @addtogroup Database
+ *
+ * This allows us to distinguish a blob from a normal string and an array of strings
+ */
+class Blob {
+ private $mData;
+ function __construct($data) {
+ $this->mData = $data;
+ }
+ function fetch() {
+ return $this->mData;
+ }
+};
+
+/**
+ * Utility class.
+ * @addtogroup Database
+ */
+class MySQLField {
+ private $name, $tablename, $default, $max_length, $nullable,
+ $is_pk, $is_unique, $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 defaultValue() {
+ return $this->default;
+ }
+
+ function maxLength() {
+ return $this->max_length;
+ }
+
+ function nullable() {
+ return $this->nullable;
+ }
+
+ function isKey() {
+ return $this->is_key;
+ }
+
+ function isMultipleKey() {
+ return $this->is_multiple;
+ }
+
+ function type() {
+ return $this->type;
+ }
+}
+
+/******************************************************************************
+ * Error classes
+ *****************************************************************************/
+
+/**
+ * Database error base class
+ * @addtogroup Database
+ */
+class DBError extends MWException {
+ public $db;
+
+ /**
+ * Construct a database error
+ * @param Database $db The database object which threw the error
+ * @param string $error A simple error message to be used for debugging
+ */
+ function __construct( Database &$db, $error ) {
+ $this->db =& $db;
+ parent::__construct( $error );
+ }
+}
+
+/**
+ * @addtogroup Database
+ */
+class DBConnectionError extends DBError {
+ public $error;
+
+ function __construct( Database &$db, $error = 'unknown error' ) {
+ $msg = 'DB connection error';
+ if ( trim( $error ) != '' ) {
+ $msg .= ": $error";
+ }
+ $this->error = $error;
+ parent::__construct( $db, $msg );
+ }
+
+ function useOutputPage() {
+ // Not likely to work
+ return false;
+ }
+
+ function useMessageCache() {
+ // Not likely to work
+ return false;
+ }
+
+ function getText() {
+ return $this->getMessage() . "\n";
+ }
+
+ function getLogMessage() {
+ # Don't send to the exception log
+ return false;
+ }
+
+ function getPageTitle() {
+ global $wgSitename;
+ return "$wgSitename has a problem";
+ }
+
+ function getHTML() {
+ global $wgTitle, $wgUseFileCache, $title, $wgInputEncoding;
+ global $wgSitename, $wgServer, $wgMessageCache;
+
+ # I give up, Brion is right. Getting the message cache to work when there is no DB is tricky.
+ # Hard coding strings instead.
+
+ $noconnect = "<p><strong>Sorry! This site is experiencing technical difficulties.</strong></p><p>Try waiting a few minutes and reloading.</p><p><small>(Can't contact the database server: $1)</small></p>";
+ $mainpage = 'Main Page';
+ $searchdisabled = <<<EOT
+<p style="margin: 1.5em 2em 1em">$wgSitename search is disabled for performance reasons. You can search via Google in the meantime.
+<span style="font-size: 89%; display: block; margin-left: .2em">Note that their indexes of $wgSitename content may be out of date.</span></p>',
+EOT;
+
+ $googlesearch = "
+<!-- SiteSearch Google -->
+<FORM method=GET action=\"http://www.google.com/search\">
+<TABLE bgcolor=\"#FFFFFF\"><tr><td>
+<A HREF=\"http://www.google.com/\">
+<IMG SRC=\"http://www.google.com/logos/Logo_40wht.gif\"
+border=\"0\" ALT=\"Google\"></A>
+</td>
+<td>
+<INPUT TYPE=text name=q size=31 maxlength=255 value=\"$1\">
+<INPUT type=submit name=btnG VALUE=\"Google Search\">
+<font size=-1>
+<input type=hidden name=domains value=\"$wgServer\"><br /><input type=radio name=sitesearch value=\"\"> WWW <input type=radio name=sitesearch value=\"$wgServer\" checked> $wgServer <br />
+<input type='hidden' name='ie' value='$2'>
+<input type='hidden' name='oe' value='$2'>
+</font>
+</td></tr></TABLE>
+</FORM>
+<!-- SiteSearch Google -->";
+ $cachederror = "The following is a cached copy of the requested page, and may not be up to date. ";
+
+ # No database access
+ if ( is_object( $wgMessageCache ) ) {
+ $wgMessageCache->disable();
+ }
+
+ if ( trim( $this->error ) == '' ) {
+ $this->error = $this->db->getProperty('mServer');
+ }
+
+ $text = str_replace( '$1', $this->error, $noconnect );
+ $text .= wfGetSiteNotice();
+
+ if($wgUseFileCache) {
+ if($wgTitle) {
+ $t =& $wgTitle;
+ } else {
+ if($title) {
+ $t = Title::newFromURL( $title );
+ } elseif (@/**/$_REQUEST['search']) {
+ $search = $_REQUEST['search'];
+ return $searchdisabled .
+ str_replace( array( '$1', '$2' ), array( htmlspecialchars( $search ),
+ $wgInputEncoding ), $googlesearch );
+ } else {
+ $t = Title::newFromText( $mainpage );
+ }
+ }
+
+ $cache = new HTMLFileCache( $t );
+ if( $cache->isFileCached() ) {
+ // @todo, FIXME: $msg is not defined on the next line.
+ $msg = '<p style="color: red"><b>'.$msg."<br />\n" .
+ $cachederror . "</b></p>\n";
+
+ $tag = '<div id="article">';
+ $text = str_replace(
+ $tag,
+ $tag . $msg,
+ $cache->fetchPageText() );
+ }
+ }
+
+ return $text;
+ }
+}
+
+/**
+ * @addtogroup Database
+ */
+class DBQueryError extends DBError {
+ public $error, $errno, $sql, $fname;
+
+ function __construct( Database &$db, $error, $errno, $sql, $fname ) {
+ $message = "A database error has occurred\n" .
+ "Query: $sql\n" .
+ "Function: $fname\n" .
+ "Error: $errno $error\n";
+
+ parent::__construct( $db, $message );
+ $this->error = $error;
+ $this->errno = $errno;
+ $this->sql = $sql;
+ $this->fname = $fname;
+ }
+
+ function getText() {
+ if ( $this->useMessageCache() ) {
+ return wfMsg( 'dberrortextcl', htmlspecialchars( $this->getSQL() ),
+ htmlspecialchars( $this->fname ), $this->errno, htmlspecialchars( $this->error ) ) . "\n";
+ } else {
+ return $this->getMessage();
+ }
+ }
+
+ function getSQL() {
+ global $wgShowSQLErrors;
+ if( !$wgShowSQLErrors ) {
+ return $this->msg( 'sqlhidden', 'SQL hidden' );
+ } else {
+ return $this->sql;
+ }
+ }
+
+ function getLogMessage() {
+ # Don't send to the exception log
+ return false;
+ }
+
+ function getPageTitle() {
+ return $this->msg( 'databaseerror', 'Database error' );
+ }
+
+ function getHTML() {
+ if ( $this->useMessageCache() ) {
+ return wfMsgNoDB( 'dberrortext', htmlspecialchars( $this->getSQL() ),
+ htmlspecialchars( $this->fname ), $this->errno, htmlspecialchars( $this->error ) );
+ } else {
+ return nl2br( htmlspecialchars( $this->getMessage() ) );
+ }
+ }
+}
+
+/**
+ * @addtogroup Database
+ */
+class DBUnexpectedError extends DBError {}
+
+/******************************************************************************/
+
/**
* Database abstraction object
- * @package MediaWiki
+ * @addtogroup Database
*/
class Database {
#------------------------------------------------------------------------------
# Variables
#------------------------------------------------------------------------------
- /**#@+
- * @private
- */
- var $mLastQuery = '';
- var $mServer, $mUser, $mPassword, $mConn = null, $mDBname;
- var $mOut, $mOpened = false;
+ protected $mLastQuery = '';
- var $mFailFunction;
- var $mTablePrefix;
- var $mFlags;
- var $mTrxLevel = 0;
- var $mErrorCount = 0;
- var $mLBInfo = array();
- /**#@-*/
+ protected $mServer, $mUser, $mPassword, $mConn = null, $mDBname;
+ protected $mOut, $mOpened = false;
+
+ protected $mFailFunction;
+ protected $mTablePrefix;
+ protected $mFlags;
+ protected $mTrxLevel = 0;
+ protected $mErrorCount = 0;
+ protected $mLBInfo = array();
#------------------------------------------------------------------------------
# Accessors
* Output page, used for reporting errors
* FALSE means discard output
*/
- function &setOutputPage( &$out ) {
- $this->mOut =& $out;
+ function setOutputPage( $out ) {
+ $this->mOut = $out;
}
/**
* Turns on (false) or off (true) the automatic generation and sending
* of a "we're sorry, but there has been a database error" page on
* database errors. Default is on (false). When turned off, the
- * code should use wfLastErrno() and wfLastError() to handle the
+ * code should use lastErrno() and lastError() to handle the
* situation as appropriate.
*/
function ignoreErrors( $ignoreErrors = NULL ) {
}
}
+ /**
+ * Returns true if this database supports (and uses) cascading deletes
+ */
+ function cascadingDeletes() {
+ return false;
+ }
+
+ /**
+ * Returns true if this database supports (and uses) triggers (e.g. on the page table)
+ */
+ function cleanupTriggers() {
+ return false;
+ }
+
+ /**
+ * Returns true if this database is strict about what can be put into an IP field.
+ * Specifically, it uses a NULL value instead of an empty string.
+ */
+ function strictIPs() {
+ return false;
+ }
+
+ /**
+ * Returns true if this database uses timestamps rather than integers
+ */
+ function realTimestamps() {
+ return false;
+ }
+
+ /**
+ * Returns true if this database does an implicit sort when doing GROUP BY
+ */
+ function implicitGroupby() {
+ return true;
+ }
+
+ /**
+ * Returns true if this database does an implicit order by when the column has an index
+ * For example: SELECT page_title FROM page LIMIT 1
+ */
+ function implicitOrderby() {
+ return true;
+ }
+
+ /**
+ * Returns true if this database can do a native search on IP columns
+ * e.g. this works as expected: .. WHERE rc_ip = '127.42.12.102/32';
+ */
+ function searchableIPs() {
+ return false;
+ }
+
+ /**
+ * Returns true if this database can use functional indexes
+ */
+ function functionalIndexes() {
+ return false;
+ }
+
/**#@+
* Get function
*/
return !!($this->mFlags & $flag);
}
+ /**
+ * General read-only accessor
+ */
+ function getProperty( $name ) {
+ return $this->$name;
+ }
+
#------------------------------------------------------------------------------
# Other functions
#------------------------------------------------------------------------------
/**@{{
+ * Constructor.
* @param string $server database server host
* @param string $user database user name
* @param string $password database user password
* @param string $dbname database name
- */
-
- /**
* @param failFunction
* @param $flags
* @param $tablePrefix String: database table prefixes. By default use the prefix gave in LocalSettings.php
*/
- function Database( $server = false, $user = false, $password = false, $dbName = false,
+ function __construct( $server = false, $user = false, $password = false, $dbName = false,
$failFunction = false, $flags = 0, $tablePrefix = 'get from global' ) {
global $wgOut, $wgDBprefix, $wgCommandLineMode;
* @param failFunction
* @param $flags
*/
- function newFromParams( $server, $user, $password, $dbName,
- $failFunction = false, $flags = 0 )
+ static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0 )
{
return new Database( $server, $user, $password, $dbName, $failFunction, $flags );
}
*/
function open( $server, $user, $password, $dbName ) {
global $wguname;
+ wfProfileIn( __METHOD__ );
# Test for missing mysql.so
# First try to load it
@dl('mysql.so');
}
+ # Fail now
# Otherwise we get a suppressed fatal error, which is very hard to track down
if ( !function_exists( 'mysql_connect' ) ) {
- wfDie( "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
+ throw new DBConnectionError( $this, "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
}
$this->close();
$success = false;
- if ( $this->mFlags & DBO_PERSISTENT ) {
- @/**/$this->mConn = mysql_pconnect( $server, $user, $password );
- } else {
- # Create a new connection...
- if( version_compare( PHP_VERSION, '4.2.0', 'ge' ) ) {
- @/**/$this->mConn = mysql_connect( $server, $user, $password, true );
+ wfProfileIn("dbconnect-$server");
+
+ # LIVE PATCH by Tim, ask Domas for why: retry loop
+ $this->mConn = false;
+ $max = 3;
+ for ( $i = 0; $i < $max && !$this->mConn; $i++ ) {
+ if ( $i > 1 ) {
+ usleep( 1000 );
+ }
+ if ( $this->mFlags & DBO_PERSISTENT ) {
+ @/**/$this->mConn = mysql_pconnect( $server, $user, $password );
} else {
- # On PHP 4.1 the new_link parameter is not available. We cannot
- # guarantee that we'll actually get a new connection, and this
- # may cause some operations to fail possibly.
- @/**/$this->mConn = mysql_connect( $server, $user, $password );
+ # Create a new connection...
+ @/**/$this->mConn = mysql_connect( $server, $user, $password, true );
+ }
+ if ($this->mConn === false) {
+ #$iplus = $i + 1;
+ #wfLogDBError("Connect loop error $iplus of $max ($server): " . mysql_errno() . " - " . mysql_error()."\n");
}
}
+
+ wfProfileOut("dbconnect-$server");
if ( $dbName != '' ) {
if ( $this->mConn !== false ) {
if ( !$success ) {
$error = "Error selecting database $dbName on server {$this->mServer} " .
"from client host {$wguname['nodename']}\n";
+ wfLogDBError(" Error selecting database $dbName on server {$this->mServer} \n");
wfDebug( $error );
}
} else {
$success = (bool)$this->mConn;
}
- if ( !$success ) {
- $this->reportConnectionError();
- }
+ 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__ );
+ }
- global $wgDBmysql5;
- if( $wgDBmysql5 ) {
- // Tell the server we're communicating with it in UTF-8.
- // This may engage various charset conversions.
- $this->query( 'SET NAMES utf8' );
+ // Turn off strict mode if it is on
+ } else {
+ $this->reportConnectionError();
}
$this->mOpened = $success;
+ wfProfileOut( __METHOD__ );
return $success;
}
/**@}}*/
}
/**
- * @private
* @param string $error fallback error message, used if none is given by MySQL
*/
function reportConnectionError( $error = 'Unknown error' ) {
}
if ( $this->mFailFunction ) {
+ # Legacy error handling method
if ( !is_int( $this->mFailFunction ) ) {
$ff = $this->mFailFunction;
$ff( $this, $error );
}
} else {
- wfEmergencyAbort( $this, $error );
+ # New method
+ wfLogDBError( "Connection error: $error\n" );
+ throw new DBConnectionError( $this, $error );
}
}
/**
- * Usually aborts on failure
- * If errors are explicitly ignored, returns success
- */
- function query( $sql, $fname = '', $tempIgnore = false ) {
+ * Usually aborts on failure. If errors are explicitly ignored, returns success.
+ *
+ * @param $sql String: SQL query
+ * @param $fname String: Name of the calling function, for profiling/SHOW PROCESSLIST
+ * comment (you can use __METHOD__ or add some extra info)
+ * @param $tempIgnore Bool: Whether to avoid throwing an exception on errors...
+ * maybe best to catch the exception instead?
+ * @return true for a successful write query, ResultWrapper object for a successful read query,
+ * or false on failure if $tempIgnore set
+ * @throws DBQueryError Thrown when the database returns an error of any kind
+ */
+ public function query( $sql, $fname = '', $tempIgnore = false ) {
global $wgProfiling;
if ( $wgProfiling ) {
$this->mLastQuery = $sql;
# Add a comment for easy SHOW PROCESSLIST interpretation
- if ( $fname ) {
- $commentedSql = preg_replace("/\s/", " /* $fname */ ", $sql, 1);
- } else {
- $commentedSql = $sql;
- }
+ #if ( $fname ) {
+ global $wgUser;
+ if ( is_object( $wgUser ) && !($wgUser instanceof StubObject) ) {
+ $userName = $wgUser->getName();
+ if ( mb_strlen( $userName ) > 15 ) {
+ $userName = mb_substr( $userName, 0, 15 ) . '...';
+ }
+ $userName = str_replace( '/', '', $userName );
+ } else {
+ $userName = '';
+ }
+ $commentedSql = preg_replace('/\s/', " /* $fname $userName */ ", $sql, 1);
+ #} else {
+ # $commentedSql = $sql;
+ #}
# If DBO_TRX is set, start a transaction
- if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() && $sql != 'BEGIN' ) {
- $this->begin();
+ if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() &&
+ $sql != 'BEGIN' && $sql != 'COMMIT' && $sql != 'ROLLBACK') {
+ // avoid establishing transactions for SHOW and SET statements too -
+ // that would delay transaction initializations to once connection
+ // is really used by application
+ $sqlstart = substr($sql,0,10); // very much worth it, benchmark certified(tm)
+ if (strpos($sqlstart,"SHOW ")!==0 and strpos($sqlstart,"SET ")!==0)
+ $this->begin();
}
if ( $this->debug() ) {
wfDebug( "Connection lost, reconnecting...\n" );
if ( $this->ping() ) {
wfDebug( "Reconnected\n" );
+ $sqlx = substr( $commentedSql, 0, 500 );
+ $sqlx = strtr( $sqlx, "\t\n", ' ' );
+ global $wgRequestTime;
+ $elapsed = round( microtime(true) - $wgRequestTime, 3 );
+ wfLogDBError( "Connection lost and reconnected after {$elapsed}s, query: $sqlx\n" );
$ret = $this->doQuery( $commentedSql );
} else {
wfDebug( "Failed\n" );
wfProfileOut( $queryProf );
wfProfileOut( $totalProf );
}
- return $ret;
+ return $this->resultObject( $ret );
}
/**
* The DBMS-dependent part of query()
- * @param string $sql SQL query.
+ * @param $sql String: SQL query.
+ * @return Result object to feed to fetchObject, fetchRow, ...; or false on failure
+ * @access private
*/
- function doQuery( $sql ) {
+ /*private*/ function doQuery( $sql ) {
if( $this->bufferResults() ) {
$ret = mysql_query( $sql, $this->mConn );
} else {
* @param bool $tempIgnore
*/
function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
- global $wgCommandLineMode, $wgFullyInitialised, $wgColorErrors;
+ global $wgCommandLineMode;
# Ignore errors during error handling to avoid infinite recursion
$ignore = $this->ignoreErrors( true );
++$this->mErrorCount;
if( $ignore || $tempIgnore ) {
wfDebug("SQL ERROR (ignored): $error\n");
+ $this->ignoreErrors( $ignore );
} else {
$sql1line = str_replace( "\n", "\\n", $sql );
wfLogDBError("$fname\t{$this->mServer}\t$errno\t$error\t$sql1line\n");
wfDebug("SQL ERROR: " . $error . "\n");
- if ( $wgCommandLineMode || !$this->mOut || empty( $wgFullyInitialised ) ) {
- $message = "A database error has occurred\n" .
- "Query: $sql\n" .
- "Function: $fname\n" .
- "Error: $errno $error\n";
- if ( !$wgCommandLineMode ) {
- $message = nl2br( $message );
- }
- if( $wgCommandLineMode && $wgColorErrors && !wfIsWindows() && posix_isatty(1) ) {
- $color = 31; // bright red!
- $message = "\x1b[1;{$color}m{$message}\x1b[0m";
- }
- wfDebugDieBacktrace( $message );
- } else {
- // this calls wfAbruptExit()
- $this->mOut->databaseError( $fname, $sql, $error, $errno );
- }
+ throw new DBQueryError( $this, $error, $errno, $sql, $fname );
}
- $this->ignoreErrors( $ignore );
}
case '\\!': return '!';
case '\\&': return '&';
}
- list( $n, $arg ) = each( $this->preparedArgs );
+ list( /* $n */ , $arg ) = each( $this->preparedArgs );
switch( $matches[1] ) {
case '?': return $this->addQuotes( $arg );
case '!': return $arg;
case '&':
# return $this->addQuotes( file_get_contents( $arg ) );
- wfDebugDieBacktrace( '& mode is not implemented. If it\'s really needed, uncomment the line above.' );
+ throw new DBUnexpectedError( $this, '& mode is not implemented. If it\'s really needed, uncomment the line above.' );
default:
- wfDebugDieBacktrace( 'Received invalid match. This should never happen!' );
+ throw new DBUnexpectedError( $this, 'Received invalid match. This should never happen!' );
}
}
* Free a result object
*/
function freeResult( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
if ( !@/**/mysql_free_result( $res ) ) {
- wfDebugDieBacktrace( "Unable to free MySQL result\n" );
+ throw new DBUnexpectedError( $this, "Unable to free MySQL result" );
}
}
/**
- * Fetch the next row from the given result object, in object form
+ * Fetch the next row from the given result object, in object form.
+ * Fields can be retrieved with $row->fieldname, with fields acting like
+ * member variables.
+ *
+ * @param $res SQL result object as returned from Database::query(), etc.
+ * @return MySQL row object
+ * @throws DBUnexpectedError Thrown if the database returns an error
*/
function fetchObject( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@/**/$row = mysql_fetch_object( $res );
- if( mysql_errno() ) {
- wfDebugDieBacktrace( 'Error in fetchObject(): ' . htmlspecialchars( mysql_error() ) );
+ if( $this->lastErrno() ) {
+ throw new DBUnexpectedError( $this, 'Error in fetchObject(): ' . htmlspecialchars( $this->lastError() ) );
}
return $row;
}
/**
- * Fetch the next row from the given result object
- * Returns an array
+ * Fetch the next row from the given result object, in associative array
+ * form. Fields are retrieved with $row['fieldname'].
+ *
+ * @param $res SQL result object as returned from Database::query(), etc.
+ * @return MySQL row object
+ * @throws DBUnexpectedError Thrown if the database returns an error
*/
function fetchRow( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@/**/$row = mysql_fetch_array( $res );
- if (mysql_errno() ) {
- wfDebugDieBacktrace( 'Error in fetchRow(): ' . htmlspecialchars( mysql_error() ) );
+ if ( $this->lastErrno() ) {
+ throw new DBUnexpectedError( $this, 'Error in fetchRow(): ' . htmlspecialchars( $this->lastError() ) );
}
return $row;
}
* Get the number of rows in a result object
*/
function numRows( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@/**/$n = mysql_num_rows( $res );
- if( mysql_errno() ) {
- wfDebugDieBacktrace( 'Error in numRows(): ' . htmlspecialchars( mysql_error() ) );
+ if( $this->lastErrno() ) {
+ throw new DBUnexpectedError( $this, 'Error in numRows(): ' . htmlspecialchars( $this->lastError() ) );
}
return $n;
}
* Get the number of fields in a result object
* See documentation for mysql_num_fields()
*/
- function numFields( $res ) { return mysql_num_fields( $res ); }
+ function numFields( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return mysql_num_fields( $res );
+ }
/**
* Get a field name in a result object
* See documentation for mysql_field_name():
* http://www.php.net/mysql_field_name
*/
- function fieldName( $res, $n ) { return mysql_field_name( $res, $n ); }
+ function fieldName( $res, $n ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return mysql_field_name( $res, $n );
+ }
/**
* Get the inserted value of an auto-increment row
* Change the position of the cursor in a result object
* See mysql_data_seek()
*/
- function dataSeek( $res, $row ) { return mysql_data_seek( $res, $row ); }
+ function dataSeek( $res, $row ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return mysql_data_seek( $res, $row );
+ }
/**
* Get the last error number
* @return array
*/
function makeSelectOptions( $options ) {
- $tailOpts = '';
+ $preLimitTail = $postLimitTail = '';
$startOpts = '';
$noKeyOptions = array();
}
}
- if ( isset( $options['GROUP BY'] ) ) $tailOpts .= " GROUP BY {$options['GROUP BY']}";
- if ( isset( $options['ORDER BY'] ) ) $tailOpts .= " ORDER BY {$options['ORDER BY']}";
+ if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
+ if ( isset( $options['HAVING'] ) ) $preLimitTail .= " HAVING {$options['HAVING']}";
+ if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
- if (isset($options['LIMIT'])) {
- $tailOpts .= $this->limitResult('', $options['LIMIT'],
- isset($options['OFFSET']) ? $options['OFFSET'] : false);
- }
+ //if (isset($options['LIMIT'])) {
+ // $tailOpts .= $this->limitResult('', $options['LIMIT'],
+ // isset($options['OFFSET']) ? $options['OFFSET']
+ // : false);
+ //}
- if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $tailOpts .= ' FOR UPDATE';
- if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $tailOpts .= ' LOCK IN SHARE MODE';
- if ( isset( $noKeyOptions['DISTINCT'] ) && isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
+ if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $postLimitTail .= ' FOR UPDATE';
+ if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $postLimitTail .= ' LOCK IN SHARE MODE';
+ if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
# Various MySQL extensions
+ if ( isset( $noKeyOptions['STRAIGHT_JOIN'] ) ) $startOpts .= ' /*! STRAIGHT_JOIN */';
if ( isset( $noKeyOptions['HIGH_PRIORITY'] ) ) $startOpts .= ' HIGH_PRIORITY';
if ( isset( $noKeyOptions['SQL_BIG_RESULT'] ) ) $startOpts .= ' SQL_BIG_RESULT';
if ( isset( $noKeyOptions['SQL_BUFFER_RESULT'] ) ) $startOpts .= ' SQL_BUFFER_RESULT';
$useIndex = '';
}
- return array( $startOpts, $useIndex, $tailOpts );
+ return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
}
/**
* SELECT wrapper
+ *
+ * @param mixed $table Array or string, table name(s) (prefix auto-added)
+ * @param mixed $vars Array or string, field name(s) to be retrieved
+ * @param mixed $conds Array or string, condition(s) for WHERE
+ * @param string $fname Calling function name (use __METHOD__) for logs/profiling
+ * @param array $options Associative array of options (e.g. array('GROUP BY' => 'page_title')),
+ * see Database::makeSelectOptions code for list of supported stuff
+ * @return mixed Database result resource (feed to Database::fetchObject or whatever), or false on failure
*/
function select( $table, $vars, $conds='', $fname = 'Database::select', $options = array() )
{
$options = array( $options );
}
if( is_array( $table ) ) {
- if ( @is_array( $options['USE INDEX'] ) )
+ if ( isset( $options['USE INDEX'] ) && is_array( $options['USE INDEX'] ) )
$from = ' FROM ' . $this->tableNamesWithUseIndex( $table, $options['USE INDEX'] );
else
$from = ' FROM ' . implode( ',', array_map( array( &$this, 'tableName' ), $table ) );
} elseif ($table!='') {
- $from = ' FROM ' . $this->tableName( $table );
+ if ($table{0}==' ') {
+ $from = ' FROM ' . $table;
+ } else {
+ $from = ' FROM ' . $this->tableName( $table );
+ }
} else {
$from = '';
}
- list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $options );
+ list( $startOpts, $useIndex, $preLimitTail, $postLimitTail ) = $this->makeSelectOptions( $options );
if( !empty( $conds ) ) {
if ( is_array( $conds ) ) {
$conds = $this->makeList( $conds, LIST_AND );
}
- $sql = "SELECT $startOpts $vars $from $useIndex WHERE $conds $tailOpts";
+ $sql = "SELECT $startOpts $vars $from $useIndex WHERE $conds $preLimitTail";
} else {
- $sql = "SELECT $startOpts $vars $from $useIndex $tailOpts";
+ $sql = "SELECT $startOpts $vars $from $useIndex $preLimitTail";
}
+ if (isset($options['LIMIT']))
+ $sql = $this->limitResult($sql, $options['LIMIT'],
+ isset($options['OFFSET']) ? $options['OFFSET'] : false);
+ $sql = "$sql $postLimitTail";
+
+ if (isset($options['EXPLAIN'])) {
+ $sql = 'EXPLAIN ' . $sql;
+ }
return $this->query( $sql, $fname );
}
return $obj;
}
+
+ /**
+ * Estimate rows in dataset
+ * Returns estimated count, based on EXPLAIN output
+ * Takes same arguments as Database::select()
+ */
+
+ 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;
+ }
+
/**
* Removes most variables from an SQL query and replaces them with X or N for numbers.
* @param string $sql A SQL Query
* @static
*/
- function generalizeSQL( $sql ) {
+ static function generalizeSQL( $sql ) {
# This does the same as the regexp below would do, but in such a way
# as to avoid crashing php on some large strings.
# $sql = preg_replace ( "/'([^\\\\']|\\\\.)*'|\"([^\\\\\"]|\\\\.)*\"/", "'X'", $sql);
$sql = preg_replace ('/".*"/s', "'X'", $sql);
# All newlines, tabs, etc replaced by single space
- $sql = preg_replace ( "/\s+/", ' ', $sql);
+ $sql = preg_replace ( '/\s+/', ' ', $sql);
# All numbers => N
$sql = preg_replace ('/-?[0-9]+/s', 'N', $sql);
return NULL;
}
+ $result = array();
while ( $row = $this->fetchObject( $res ) ) {
if ( $row->Key_name == $index ) {
- return $row;
+ $result[] = $row;
}
}
- return false;
+ $this->freeResult($res);
+
+ return empty($result) ? false : $result;
}
/**
function fieldInfo( $table, $field ) {
$table = $this->tableName( $table );
$res = $this->query( "SELECT * FROM $table LIMIT 1" );
- $n = mysql_num_fields( $res );
+ $n = mysql_num_fields( $res->result );
for( $i = 0; $i < $n; $i++ ) {
- $meta = mysql_fetch_field( $res, $i );
+ $meta = mysql_fetch_field( $res->result, $i );
if( $field == $meta->name ) {
- return $meta;
+ return new MySQLField($meta);
}
}
return false;
* mysql_field_type() wrapper
*/
function fieldType( $res, $index ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
return mysql_field_type( $res, $index );
}
if ( !$indexInfo ) {
return NULL;
}
- return !$indexInfo->Non_unique;
+ return !$indexInfo[0]->Non_unique;
}
/**
* (for the log)
* @param array $options An array of UPDATE options, can be one or
* more of IGNORE, LOW_PRIORITY
+ * @return bool
*/
function update( $table, $values, $conds, $fname = 'Database::update', $options = array() ) {
$table = $this->tableName( $table );
if ( $conds != '*' ) {
$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
}
- $this->query( $sql, $fname );
+ return $this->query( $sql, $fname );
}
/**
- * Makes a wfStrencoded list from an array
+ * Makes an encoded list of strings from an array
* $mode:
* LIST_COMMA - comma separated, no field names
* LIST_AND - ANDed WHERE clause (without the WHERE)
*/
function makeList( $a, $mode = LIST_COMMA ) {
if ( !is_array( $a ) ) {
- wfDebugDieBacktrace( 'Database::makeList called with incorrect parameters' );
+ throw new DBUnexpectedError( $this, 'Database::makeList called with incorrect parameters' );
}
$first = true;
}
if ( ($mode == LIST_AND || $mode == LIST_OR) && is_numeric( $field ) ) {
$list .= "($value)";
- } elseif ( ($mode == LIST_AND || $mode == LIST_OR) && is_array ($value) ) {
- $list .= $field." IN (".$this->makeList($value).") ";
+ } elseif ( ($mode == LIST_SET) && is_numeric( $field ) ) {
+ $list .= "$value";
+ } elseif ( ($mode == LIST_AND || $mode == LIST_OR) && is_array($value) ) {
+ if( count( $value ) == 0 ) {
+ // Empty input... or should this throw an error?
+ $list .= '0';
+ } elseif( count( $value ) == 1 ) {
+ // Special-case single values, as IN isn't terribly efficient
+ $list .= $field." = ".$this->addQuotes( $value[0] );
+ } else {
+ $list .= $field." IN (".$this->makeList($value).") ";
+ }
+ } elseif( is_null($value) ) {
+ if ( $mode == LIST_AND || $mode == LIST_OR ) {
+ $list .= "$field IS ";
+ } elseif ( $mode == LIST_SET ) {
+ $list .= "$field = ";
+ }
+ $list .= 'NULL';
} else {
if ( $mode == LIST_AND || $mode == LIST_OR || $mode == LIST_SET ) {
$list .= "$field = ";
global $wgSharedDB;
# Skip quoted literals
if ( $name{0} != '`' ) {
- if ( $this->mTablePrefix !== '' && strpos( '.', $name ) === false ) {
+ if ( $this->mTablePrefix !== '' && strpos( $name, '.' ) === false ) {
$name = "{$this->mTablePrefix}$name";
}
if ( isset( $wgSharedDB ) && "{$this->mTablePrefix}user" == $name ) {
* $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
* WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
*/
- function tableNames() {
+ public function tableNames() {
$inArray = func_get_args();
$retVal = array();
foreach ( $inArray as $name ) {
}
return $retVal;
}
+
+ /**
+ * Fetch a number of table names into an zero-indexed numerical array
+ * This is handy when you need to construct SQL for joins
+ *
+ * Example:
+ * list( $user, $watchlist ) = $dbr->tableNamesN('user','watchlist');
+ * $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
+ * WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
+ */
+ public function tableNamesN() {
+ $inArray = func_get_args();
+ $retVal = array();
+ foreach ( $inArray as $name ) {
+ $retVal[] = $this->tableName( $name );
+ }
+ return $retVal;
+ }
/**
* @private
* @return string slashed string.
*/
function strencode( $s ) {
- return addslashes( $s );
+ return mysql_real_escape_string( $s, $this->mConn );
}
/**
*/
function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'Database::deleteJoin' ) {
if ( !$conds ) {
- wfDebugDieBacktrace( 'Database::deleteJoin() called with empty $conds' );
+ throw new DBUnexpectedError( $this, 'Database::deleteJoin() called with empty $conds' );
}
$delTable = $this->tableName( $delTable );
$row = $this->fetchObject( $res );
$this->freeResult( $res );
- if ( preg_match( "/\((.*)\)/", $row->Type, $m ) ) {
+ $m = array();
+ if ( preg_match( '/\((.*)\)/', $row->Type, $m ) ) {
$size = $m[1];
} else {
$size = -1;
*/
function delete( $table, $conds, $fname = 'Database::delete' ) {
if ( !$conds ) {
- wfDebugDieBacktrace( 'Database::delete() called with no conditions' );
+ throw new DBUnexpectedError( $this, 'Database::delete() called with no conditions' );
}
$table = $this->tableName( $table );
$sql = "DELETE FROM $table";
*/
function limitResult($sql, $limit, $offset=false) {
if( !is_numeric($limit) ) {
- wfDie( "Invalid non-numeric limit passed to limitResult()\n" );
+ throw new DBUnexpectedError( $this, "Invalid non-numeric limit passed to limitResult()\n" );
}
return " $sql LIMIT "
. ( (is_numeric($offset) && $offset != 0) ? "{$offset}," : "" )
}
/**
- * Begin a transaction, or if a transaction has already started, continue it
+ * Begin a transaction, committing any previously open transaction
*/
function begin( $fname = 'Database::begin' ) {
- if ( !$this->mTrxLevel ) {
- $this->immediateBegin( $fname );
- } else {
- $this->mTrxLevel++;
- }
+ $this->query( 'BEGIN', $fname );
+ $this->mTrxLevel = 1;
}
/**
- * End a transaction, or decrement the nest level if transactions are nested
+ * End a transaction
*/
function commit( $fname = 'Database::commit' ) {
- if ( $this->mTrxLevel ) {
- $this->mTrxLevel--;
- }
- if ( !$this->mTrxLevel ) {
- $this->immediateCommit( $fname );
- }
+ $this->query( 'COMMIT', $fname );
+ $this->mTrxLevel = 0;
}
/**
- * Rollback a transaction
+ * Rollback a transaction.
+ * No-op on non-transactional databases.
*/
function rollback( $fname = 'Database::rollback' ) {
- $this->query( 'ROLLBACK', $fname );
+ $this->query( 'ROLLBACK', $fname, true );
$this->mTrxLevel = 0;
}
/**
* Begin a transaction, committing any previously open transaction
+ * @deprecated use begin()
*/
function immediateBegin( $fname = 'Database::immediateBegin' ) {
- $this->query( 'BEGIN', $fname );
- $this->mTrxLevel = 1;
+ $this->begin();
}
/**
* Commit transaction, if one is open
+ * @deprecated use commit()
*/
function immediateCommit( $fname = 'Database::immediateCommit' ) {
- $this->query( 'COMMIT', $fname );
- $this->mTrxLevel = 0;
+ $this->commit();
}
/**
*/
function resultObject( $result ) {
if( empty( $result ) ) {
- return NULL;
+ return false;
+ } elseif ( $result instanceof ResultWrapper ) {
+ return $result;
+ } elseif ( $result === true ) {
+ // Successful write query
+ return $result;
} else {
return new ResultWrapper( $this, $result );
}
* @return string Version information from the database
*/
function getServerVersion() {
- return mysql_get_server_info();
+ return mysql_get_server_info( $this->mConn );
}
/**
*/
function getLag() {
$res = $this->query( 'SHOW PROCESSLIST' );
- # Find slave SQL thread. Assumed to be the second one running, which is a bit
- # dubious, but unfortunately there's no easy rigorous way
- $slaveThreads = 0;
+ # Find slave SQL thread
while ( $row = $this->fetchObject( $res ) ) {
- if ( $row->User == 'system user' ) {
- if ( ++$slaveThreads == 2 ) {
- # This is it, return the time (except -ve)
- if ( $row->Time > 0x7fffffff ) {
- return false;
- } else {
- return $row->Time;
- }
+ /* 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'
+ ) {
+ # This is it, return the time (except -ve)
+ if ( $row->Time > 0x7fffffff ) {
+ return false;
+ } else {
+ return $row->Time;
}
}
}
return $b;
}
+ function decodeBlob($b) {
+ return $b;
+ }
+
+ /**
+ * Override database's default connection timeout.
+ * May be useful for very long batch queries such as
+ * full-wiki dumps, where a single query reads out
+ * over hours or days.
+ * @param int $timeout in seconds
+ */
+ public function setTimeout( $timeout ) {
+ $this->query( "SET net_read_timeout=$timeout" );
+ $this->query( "SET net_write_timeout=$timeout" );
+ }
+
/**
* Read and execute SQL commands from a file.
* Returns true on success, error string on failure
+ * @param string $filename File name to open
+ * @param callback $lineCallback Optional function called before reading each line
+ * @param callback $resultCallback Optional function called for each MySQL result
*/
- function sourceFile( $filename ) {
+ function sourceFile( $filename, $lineCallback = false, $resultCallback = false ) {
$fp = fopen( $filename, 'r' );
if ( false === $fp ) {
- return "Could not open \"{$fname}\".\n";
+ return "Could not open \"{$filename}\".\n";
}
+ $error = $this->sourceStream( $fp, $lineCallback, $resultCallback );
+ fclose( $fp );
+ return $error;
+ }
+ /**
+ * Read and execute commands from an open file handle
+ * Returns true on success, error string on failure
+ * @param string $fp File handle
+ * @param callback $lineCallback Optional function called before reading each line
+ * @param callback $resultCallback Optional function called for each MySQL result
+ */
+ function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
$cmd = "";
$done = false;
$dollarquote = false;
while ( ! feof( $fp ) ) {
+ if ( $lineCallback ) {
+ call_user_func( $lineCallback );
+ }
$line = trim( fgets( $fp, 1024 ) );
$sl = strlen( $line ) - 1;
if ( $done ) {
$cmd = str_replace(';;', ";", $cmd);
$cmd = $this->replaceVars( $cmd );
- $res = $this->query( $cmd, 'dbsource', true );
+ $res = $this->query( $cmd, __METHOD__, true );
+ if ( $resultCallback ) {
+ call_user_func( $resultCallback, $res );
+ }
if ( false === $res ) {
$err = $this->lastError();
$done = false;
}
}
- fclose( $fp );
return true;
}
+
/**
* Replace variables in sourced SQL
*/
- function replaceVars( $ins ) {
+ protected function replaceVars( $ins ) {
$varnames = array(
'wgDBserver', 'wgDBname', 'wgDBintlname', 'wgDBuser',
'wgDBpassword', 'wgDBsqluser', 'wgDBsqlpassword',
- 'wgDBadminuser', 'wgDBadminpassword',
+ 'wgDBadminuser', 'wgDBadminpassword', 'wgDBTableOptions',
);
// Ordinary variables
foreach ( $varnames as $var ) {
if( isset( $GLOBALS[$var] ) ) {
- $val = addslashes( $GLOBALS[$var] );
+ $val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
$ins = str_replace( '{$' . $var . '}', $val, $ins );
$ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
$ins = str_replace( '/*$' . $var . '*/', $val, $ins );
* Table name callback
* @private
*/
- function tableNameCallback( $matches ) {
+ protected function tableNameCallback( $matches ) {
return $this->tableName( $matches[1] );
}
+ /*
+ * Build a concatenation list to feed into a SQL query
+ */
+ function buildConcat( $stringList ) {
+ return 'CONCAT(' . implode( ',', $stringList ) . ')';
+ }
+
}
/**
* Database abstraction object for mySQL
* Inherit all methods and properties of Database::Database()
*
- * @package MediaWiki
+ * @addtogroup Database
* @see Database
*/
class DatabaseMysql extends Database {
/**
* Result wrapper for grabbing data queried by someone else
- *
- * @package MediaWiki
+ * @addtogroup Database
*/
-class ResultWrapper {
- var $db, $result;
+class ResultWrapper implements Iterator {
+ var $db, $result, $pos = 0, $currentRow = null;
/**
- * @todo document
+ * Create a new result object from a result resource and a Database object
*/
- function ResultWrapper( &$database, $result ) {
- $this->db =& $database;
- $this->result =& $result;
+ function ResultWrapper( $database, $result ) {
+ $this->db = $database;
+ if ( $result instanceof ResultWrapper ) {
+ $this->result = $result->result;
+ } else {
+ $this->result = $result;
+ }
}
/**
- * @todo document
+ * Get the number of rows in a result object
*/
function numRows() {
return $this->db->numRows( $this->result );
}
/**
- * @todo document
+ * Fetch the next row from the given result object, in object form.
+ * Fields can be retrieved with $row->fieldname, with fields acting like
+ * member variables.
+ *
+ * @param $res SQL result object as returned from Database::query(), etc.
+ * @return MySQL row object
+ * @throws DBUnexpectedError Thrown if the database returns an error
*/
function fetchObject() {
return $this->db->fetchObject( $this->result );
}
/**
- * @todo document
+ * Fetch the next row from the given result object, in associative array
+ * form. Fields are retrieved with $row['fieldname'].
+ *
+ * @param $res SQL result object as returned from Database::query(), etc.
+ * @return MySQL row object
+ * @throws DBUnexpectedError Thrown if the database returns an error
*/
- function &fetchRow() {
+ function fetchRow() {
return $this->db->fetchRow( $this->result );
}
/**
- * @todo document
+ * Free a result object
*/
function free() {
$this->db->freeResult( $this->result );
unset( $this->db );
}
+ /**
+ * Change the position of the cursor in a result object
+ * See mysql_data_seek()
+ */
function seek( $row ) {
$this->db->dataSeek( $this->result, $row );
}
-}
-
-
-#------------------------------------------------------------------------------
-# Global functions
-#------------------------------------------------------------------------------
-
-/**
- * Standard fail function, called by default when a connection cannot be
- * established.
- * Displays the file cache if possible
- */
-function wfEmergencyAbort( &$conn, $error ) {
- global $wgTitle, $wgUseFileCache, $title, $wgInputEncoding, $wgOutputEncoding;
- global $wgSitename, $wgServer, $wgMessageCache, $wgLogo;
-
- # I give up, Brion is right. Getting the message cache to work when there is no DB is tricky.
- # Hard coding strings instead.
-
- $noconnect = "<h1><img src='$wgLogo' style='float:left;margin-right:1em' alt=''>$wgSitename has a problem</h1><p><strong>Sorry! This site is experiencing technical difficulties.</strong></p><p>Try waiting a few minutes and reloading.</p><p><small>(Can't contact the database server: $1)</small></p>";
- $mainpage = 'Main Page';
- $searchdisabled = <<<EOT
-<p style="margin: 1.5em 2em 1em">$wgSitename search is disabled for performance reasons. You can search via Google in the meantime.
-<span style="font-size: 89%; display: block; margin-left: .2em">Note that their indexes of $wgSitename content may be out of date.</span></p>',
-EOT;
-
- $googlesearch = "
-<!-- SiteSearch Google -->
-<FORM method=GET action=\"http://www.google.com/search\">
-<TABLE bgcolor=\"#FFFFFF\"><tr><td>
-<A HREF=\"http://www.google.com/\">
-<IMG SRC=\"http://www.google.com/logos/Logo_40wht.gif\"
-border=\"0\" ALT=\"Google\"></A>
-</td>
-<td>
-<INPUT TYPE=text name=q size=31 maxlength=255 value=\"$1\">
-<INPUT type=submit name=btnG VALUE=\"Google Search\">
-<font size=-1>
-<input type=hidden name=domains value=\"$wgServer\"><br /><input type=radio name=sitesearch value=\"\"> WWW <input type=radio name=sitesearch value=\"$wgServer\" checked> $wgServer <br />
-<input type='hidden' name='ie' value='$2'>
-<input type='hidden' name='oe' value='$2'>
-</font>
-</td></tr></TABLE>
-</FORM>
-<!-- SiteSearch Google -->";
- $cachederror = "The following is a cached copy of the requested page, and may not be up to date. ";
-
+ /*********************
+ * Iterator functions
+ * Note that using these in combination with the non-iterator functions
+ * above may cause rows to be skipped or repeated.
+ */
- if( !headers_sent() ) {
- header( 'HTTP/1.0 500 Internal Server Error' );
- header( 'Content-type: text/html; charset='.$wgOutputEncoding );
- /* Don't cache error pages! They cause no end of trouble... */
- header( 'Cache-control: none' );
- header( 'Pragma: nocache' );
+ function rewind() {
+ if ($this->numRows()) {
+ $this->db->dataSeek($this->result, 0);
+ }
+ $this->pos = 0;
+ $this->currentRow = null;
}
- # No database access
- if ( is_object( $wgMessageCache ) ) {
- $wgMessageCache->disable();
+ function current() {
+ if ( is_null( $this->currentRow ) ) {
+ $this->next();
+ }
+ return $this->currentRow;
}
- if ( trim( $error ) == '' ) {
- $error = $this->mServer;
+ function key() {
+ return $this->pos;
}
- wfLogDBError( "Connection error: $error\n" );
-
- $text = str_replace( '$1', $error, $noconnect );
- $text .= wfGetSiteNotice();
-
- if($wgUseFileCache) {
- if($wgTitle) {
- $t =& $wgTitle;
- } else {
- if($title) {
- $t = Title::newFromURL( $title );
- } elseif (@/**/$_REQUEST['search']) {
- $search = $_REQUEST['search'];
- echo $searchdisabled;
- echo str_replace( array( '$1', '$2' ), array( htmlspecialchars( $search ),
- $wgInputEncoding ), $googlesearch );
- wfErrorExit();
- } else {
- $t = Title::newFromText( $mainpage );
- }
- }
-
- $cache = new CacheManager( $t );
- if( $cache->isFileCached() ) {
- $msg = '<p style="color: red"><b>'.$msg."<br />\n" .
- $cachederror . "</b></p>\n";
-
- $tag = '<div id="article">';
- $text = str_replace(
- $tag,
- $tag . $msg,
- $cache->fetchPageText() );
- }
+ function next() {
+ $this->pos++;
+ $this->currentRow = $this->fetchObject();
+ return $this->currentRow;
}
- echo $text;
- wfErrorExit();
+ function valid() {
+ return $this->current() !== false;
+ }
}
-?>
+
dépôts / lhc / web / wiklou.git / blobdiff