<?php
-require_once( "FulltextStoplist.php" );
-require_once( "CacheManager.php" );
+/**
+ * This file deals with MySQL interface functions
+ * and query specifics/optimisations
+ * @package MediaWiki
+ */
-define( "DB_READ", -1 );
-define( "DB_WRITE", -2 );
-define( "DB_LAST", -3 );
+/**
+ * Depends on the CacheManager
+ */
+require_once( 'CacheManager.php' );
-define( "LIST_COMMA", 0 );
-define( "LIST_AND", 1 );
-define( "LIST_SET", 2 );
+/** See Database::makeList() */
+define( 'LIST_COMMA', 0 );
+define( 'LIST_AND', 1 );
+define( 'LIST_SET', 2 );
+define( 'LIST_NAMES', 3);
+/** Number of times to re-try an operation in case of deadlock */
+define( 'DEADLOCK_TRIES', 4 );
+/** Minimum time to wait before retry, in microseconds */
+define( 'DEADLOCK_DELAY_MIN', 500000 );
+/** Maximum time to wait before retry */
+define( 'DEADLOCK_DELAY_MAX', 1500000 );
+
+/**
+ * Database abstraction object
+ * @package MediaWiki
+ */
class Database {
#------------------------------------------------------------------------------
# Variables
-#------------------------------------------------------------------------------
- /* private */ var $mLastQuery = "";
- /* private */ var $mBufferResults = true;
- /* private */ var $mIgnoreErrors = false;
+#------------------------------------------------------------------------------
+ /**#@+
+ * @access private
+ */
+ var $mLastQuery = '';
- /* private */ var $mServer, $mUser, $mPassword, $mConn, $mDBname;
- /* private */ var $mOut, $mDebug, $mOpened = false;
+ var $mServer, $mUser, $mPassword, $mConn, $mDBname;
+ var $mOut, $mOpened = false;
- /* private */ var $mFailFunction;
+ var $mFailFunction;
+ var $mTablePrefix;
+ var $mFlags;
+ var $mTrxLevel = 0;
+ /**#@-*/
#------------------------------------------------------------------------------
# Accessors
#------------------------------------------------------------------------------
- # Set functions
- # These set a variable and return the previous state
+ # These optionally set a variable and return the previous state
- # Fail function, takes a Database as a parameter
- # Set to false for default, 1 for ignore errors
- function setFailFunction( $function ) { return wfSetVar( $this->mFailFunction, $function ); }
+ /**
+ * Fail function, takes a Database as a parameter
+ * Set to false for default, 1 for ignore errors
+ */
+ function failFunction( $function = NULL ) {
+ return wfSetVar( $this->mFailFunction, $function );
+ }
- # Output page, used for reporting errors
- # FALSE means discard output
- function &setOutputPage( &$out ) { return wfSetRef( $this->mOut, $out ); }
+ /**
+ * Output page, used for reporting errors
+ * FALSE means discard output
+ */
+ function &setOutputPage( &$out ) {
+ $this->mOut =& $out;
+ }
- # Boolean, controls output of large amounts of debug information
- function setDebug( $debug ) { return wfSetVar( $this->mDebug, $debug ); }
+ /**
+ * Boolean, controls output of large amounts of debug information
+ */
+ function debug( $debug = NULL ) {
+ return wfSetBit( $this->mFlags, DBO_DEBUG, $debug );
+ }
- # Turns buffering of SQL result sets on (true) or off (false). Default is
- # "on" and it should not be changed without good reasons.
- function setBufferResults( $buffer ) { return wfSetVar( $this->mBufferResults, $buffer ); }
+ /**
+ * Turns buffering of SQL result sets on (true) or off (false).
+ * Default is "on" and it should not be changed without good reasons.
+ */
+ function bufferResults( $buffer = NULL ) {
+ if ( is_null( $buffer ) ) {
+ return !(bool)( $this->mFlags & DBO_NOBUFFER );
+ } else {
+ return !wfSetBit( $this->mFlags, DBO_NOBUFFER, !$buffer );
+ }
+ }
- # 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
- # situation as appropriate.
- function setIgnoreErrors( $ignoreErrors ) { return wfSetVar( $this->mIgnoreErrors, $ignoreErrors ); }
-
- # Get functions
+ /**
+ * 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
+ * situation as appropriate.
+ */
+ function ignoreErrors( $ignoreErrors = NULL ) {
+ return wfSetBit( $this->mFlags, DBO_IGNORE, $ignoreErrors );
+ }
+ /**
+ * The current depth of nested transactions
+ * @param integer $level
+ */
+ function trxLevel( $level = NULL ) {
+ return wfSetVar( $this->mTrxLevel, $level );
+ }
+
+ /**#@+
+ * Get function
+ */
function lastQuery() { return $this->mLastQuery; }
function isOpen() { return $this->mOpened; }
+ /**#@-*/
#------------------------------------------------------------------------------
# Other functions
#------------------------------------------------------------------------------
- function Database()
- {
- global $wgOut;
+ /**#@+
+ * @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 string $tablePrefix Database table prefixes. By default use the prefix gave in LocalSettings.php
+ */
+ function Database( $server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global' ) {
+
+ global $wgOut, $wgDBprefix, $wgCommandLineMode;
# Can't get a reference if it hasn't been set yet
if ( !isset( $wgOut ) ) {
$wgOut = NULL;
}
$this->mOut =& $wgOut;
-
+
+ $this->mFailFunction = $failFunction;
+ $this->mFlags = $flags;
+
+ if ( $this->mFlags & DBO_DEFAULT ) {
+ if ( $wgCommandLineMode ) {
+ $this->mFlags &= ~DBO_TRX;
+ } else {
+ $this->mFlags |= DBO_TRX;
+ }
+ }
+
+ /** Get the default table prefix*/
+ if ( $tablePrefix == 'get from global' ) {
+ $this->mTablePrefix = $wgDBprefix;
+ } else {
+ $this->mTablePrefix = $tablePrefix;
+ }
+
+ if ( $server ) {
+ $this->open( $server, $user, $password, $dbName );
+ }
}
- /* static */ function newFromParams( $server, $user, $password, $dbName,
- $failFunction = false, $debug = false, $bufferResults = true, $ignoreErrors = false )
+ /**
+ * @static
+ * @param failFunction
+ * @param $flags
+ */
+ function newFromParams( $server, $user, $password, $dbName,
+ $failFunction = false, $flags = 0 )
{
- $db = new Database;
- $db->mFailFunction = $failFunction;
- $db->mIgnoreErrors = $ignoreErrors;
- $db->mDebug = $debug;
- $db->mBufferResults = $bufferResults;
- $db->open( $server, $user, $password, $dbName );
- return $db;
- }
-
- # Usually aborts on failure
- # If the failFunction is set to a non-zero integer, returns success
- function open( $server, $user, $password, $dbName )
- {
- global $wgEmergencyContact;
+ return new Database( $server, $user, $password, $dbName, $failFunction, $flags );
+ }
+
+ /**
+ * Usually aborts on failure
+ * If the failFunction is set to a non-zero integer, returns success
+ */
+ function open( $server, $user, $password, $dbName ) {
+ # Test for missing mysql.so
+ # First try to load it
+ if (!@extension_loaded('mysql')) {
+ @dl('mysql.so');
+ }
+
+ # Otherwise we get a suppressed fatal error, which is very hard to track down
+ if ( !function_exists( 'mysql_connect' ) ) {
+ die( "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
+ }
$this->close();
$this->mServer = $server;
$success = false;
- @$this->mConn = mysql_connect( $server, $user, $password );
- if ( $dbName != "" ) {
+ @/**/$this->mConn = mysql_connect( $server, $user, $password );
+ if ( $dbName != '' ) {
if ( $this->mConn !== false ) {
- $success = @mysql_select_db( $dbName, $this->mConn );
+ $success = @/**/mysql_select_db( $dbName, $this->mConn );
if ( !$success ) {
wfDebug( "Error selecting database \"$dbName\": " . $this->lastError() . "\n" );
}
$this->mOpened = $success;
return $success;
}
+ /**#@-*/
- # Closes a database connection, if it is open
- # Returns success, true if already closed
+ /**
+ * Closes a database connection.
+ * if it is open : commits any open transactions
+ *
+ * @return bool operation success. true if already closed.
+ */
function close()
{
$this->mOpened = false;
if ( $this->mConn ) {
+ if ( $this->trxLevel() ) {
+ $this->immediateCommit();
+ }
return mysql_close( $this->mConn );
} else {
return true;
}
}
- /* private */ function reportConnectionError( $msg = "")
- {
+ /**
+ * @access private
+ * @param string $msg error message ?
+ * @todo parameter $msg is not used
+ */
+ function reportConnectionError( $msg = '') {
if ( $this->mFailFunction ) {
if ( !is_int( $this->mFailFunction ) ) {
- $this->$mFailFunction( $this );
+ $ff = $this->mFailFunction;
+ $ff( $this, mysql_error() );
}
} else {
- wfEmergencyAbort( $this );
+ wfEmergencyAbort( $this, mysql_error() );
}
}
- # Usually aborts on failure
- # If errors are explicitly ignored, returns success
- function query( $sql, $fname = "" )
- {
- global $wgProfiling;
+ /**
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns success
+ */
+ function query( $sql, $fname = '', $tempIgnore = false ) {
+ global $wgProfiling, $wgCommandLineMode;
if ( $wgProfiling ) {
# generalizeSQL will probably cut down the query to reasonable
# logging size most of the time. The substr is really just a sanity check.
- $profName = "query: " . substr( Database::generalizeSQL( $sql ), 0, 255 );
+ $profName = 'query: ' . substr( Database::generalizeSQL( $sql ), 0, 255 );
wfProfileIn( $profName );
}
$this->mLastQuery = $sql;
- if ( $this->mDebug ) {
+ if ( $this->debug() ) {
$sqlx = substr( $sql, 0, 500 );
- $sqlx = wordwrap(strtr($sqlx,"\t\n"," "));
+ $sqlx = wordwrap(strtr($sqlx,"\t\n",' '));
wfDebug( "SQL: $sqlx\n" );
}
- if( $this->mBufferResults ) {
- $ret = mysql_query( $sql, $this->mConn );
+ # Add a comment for easy SHOW PROCESSLIST interpretation
+ if ( $fname ) {
+ $commentedSql = "/* $fname */ $sql";
} else {
- $ret = mysql_unbuffered_query( $sql, $this->mConn );
+ $commentedSql = $sql;
}
-
- if ( false === $ret ) {
- $error = mysql_error( $this->mConn );
- $errno = mysql_errno( $this->mConn );
- if( $this->mIgnoreErrors ) {
- wfDebug("SQL ERROR (ignored): " . $error . "\n");
- } else {
- wfDebug("SQL ERROR: " . $error . "\n");
- if ( $this->mOut ) {
- // this calls wfAbruptExit()
- $this->mOut->databaseError( $fname, $sql, $error, $errno );
- }
- }
+
+ # If DBO_TRX is set, start a transaction
+ if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() && $sql != 'BEGIN' ) {
+ $this->begin();
}
+ # Do the query and handle errors
+ $ret = $this->doQuery( $commentedSql );
+ if ( false === $ret ) {
+ $this->reportQueryError( $this->lastError(), $this->lastErrno(), $sql, $fname, $tempIgnore );
+ }
+
if ( $wgProfiling ) {
wfProfileOut( $profName );
}
return $ret;
}
+ /**
+ * The DBMS-dependent part of query()
+ * @param string $sql SQL query.
+ */
+ function doQuery( $sql ) {
+ if( $this->bufferResults() ) {
+ $ret = mysql_query( $sql, $this->mConn );
+ } else {
+ $ret = mysql_unbuffered_query( $sql, $this->mConn );
+ }
+ return $ret;
+ }
+
+ /**
+ * @param $error
+ * @param $errno
+ * @param $sql
+ * @param string $fname
+ * @param bool $tempIgnore
+ */
+ function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
+ global $wgCommandLineMode, $wgFullyInitialised;
+ # Ignore errors during error handling to avoid infinite recursion
+ $ignore = $this->ignoreErrors( true );
+
+ if( $ignore || $tempIgnore ) {
+ wfDebug("SQL ERROR (ignored): " . $error . "\n");
+ } else {
+ $sql1line = str_replace( "\n", "\\n", $sql );
+ wfLogDBError("$fname\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 );
+ }
+ wfDebugDieBacktrace( $message );
+ } else {
+ // this calls wfAbruptExit()
+ $this->mOut->databaseError( $fname, $sql, $error, $errno );
+ }
+ }
+ $this->ignoreErrors( $ignore );
+ }
+
+
+ /**
+ * Intended to be compatible with the PEAR::DB wrapper functions.
+ * http://pear.php.net/manual/en/package.database.db.intro-execute.php
+ *
+ * ? = scalar value, quoted as necessary
+ * ! = raw SQL bit (a function for instance)
+ * & = filename; reads the file and inserts as a blob
+ * (we don't use this though...)
+ */
+ function prepare( $sql, $func = 'Database::prepare' ) {
+ /* MySQL doesn't support prepared statements (yet), so just
+ pack up the query for reference. We'll manually replace
+ the bits later. */
+ return array( 'query' => $sql, 'func' => $func );
+ }
+
+ function freePrepared( $prepared ) {
+ /* No-op for MySQL */
+ }
+
+ /**
+ * Execute a prepared query with the various arguments
+ * @param string $prepared the prepared sql
+ * @param mixed $args Either an array here, or put scalars as varargs
+ */
+ function execute( $prepared, $args = null ) {
+ if( !is_array( $args ) ) {
+ # Pull the var args
+ $args = func_get_args();
+ array_shift( $args );
+ }
+ $sql = $this->fillPrepared( $prepared['query'], $args );
+ return $this->query( $sql, $prepared['func'] );
+ }
+
+ /**
+ * Prepare & execute an SQL statement, quoting and inserting arguments
+ * in the appropriate places.
+ * @param string $query
+ * @param string $args (default null)
+ */
+ function safeQuery( $query, $args = null ) {
+ $prepared = $this->prepare( $query, 'Database::safeQuery' );
+ if( !is_array( $args ) ) {
+ # Pull the var args
+ $args = func_get_args();
+ array_shift( $args );
+ }
+ $retval = $this->execute( $prepared, $args );
+ $this->freePrepared( $prepared );
+ return $retval;
+ }
+
+ /**
+ * For faking prepared SQL statements on DBs that don't support
+ * it directly.
+ * @param string $preparedSql - a 'preparable' SQL statement
+ * @param array $args - array of arguments to fill it with
+ * @return string executable SQL
+ */
+ function fillPrepared( $preparedQuery, $args ) {
+ $n = 0;
+ reset( $args );
+ $this->preparedArgs =& $args;
+ return preg_replace_callback( '/(\\\\[?!&]|[?!&])/',
+ array( &$this, 'fillPreparedArg' ), $preparedQuery );
+ }
+
+ /**
+ * preg_callback func for fillPrepared()
+ * The arguments should be in $this->preparedArgs and must not be touched
+ * while we're doing this.
+ *
+ * @param array $matches
+ * @return string
+ * @access private
+ */
+ function fillPreparedArg( $matches ) {
+ switch( $matches[1] ) {
+ case '\\?': return '?';
+ case '\\!': return '!';
+ case '\\&': return '&';
+ }
+ 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.' );
+ default:
+ wfDebugDieBacktrace( 'Received invalid match. This should never happen!' );
+ }
+ }
+
+ /**#@+
+ * @param mixed $res A SQL result
+ */
+ /**
+ * Free a result object
+ */
function freeResult( $res ) {
- if ( !@mysql_free_result( $res ) ) {
+ if ( !@/**/mysql_free_result( $res ) ) {
wfDebugDieBacktrace( "Unable to free MySQL result\n" );
}
}
+
+ /**
+ * Fetch the next row from the given result object, in object form
+ */
function fetchObject( $res ) {
- @$row = mysql_fetch_object( $res );
- # FIXME: HACK HACK HACK HACK debug
+ @/**/$row = mysql_fetch_object( $res );
if( mysql_errno() ) {
- wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( mysql_error() ) );
+ wfDebugDieBacktrace( 'Error in fetchObject(): ' . htmlspecialchars( mysql_error() ) );
}
return $row;
}
+
+ /**
+ * Fetch the next row from the given result object
+ * Returns an array
+ */
+ function fetchRow( $res ) {
+ @/**/$row = mysql_fetch_array( $res );
+ if (mysql_errno() ) {
+ wfDebugDieBacktrace( 'Error in fetchRow(): ' . htmlspecialchars( mysql_error() ) );
+ }
+ return $row;
+ }
+
+ /**
+ * Get the number of rows in a result object
+ */
function numRows( $res ) {
- @$n = mysql_num_rows( $res );
+ @/**/$n = mysql_num_rows( $res );
if( mysql_errno() ) {
- wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( mysql_error() ) );
+ wfDebugDieBacktrace( 'Error in numRows(): ' . htmlspecialchars( mysql_error() ) );
}
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 ); }
+
+ /**
+ * Get a field name in a result object
+ * See documentation for mysql_field_name()
+ */
function fieldName( $res, $n ) { return mysql_field_name( $res, $n ); }
+
+ /**
+ * Get the inserted value of an auto-increment row
+ *
+ * The value inserted should be fetched from nextSequenceValue()
+ *
+ * Example:
+ * $id = $dbw->nextSequenceValue('page_page_id_seq');
+ * $dbw->insert('page',array('page_id' => $id));
+ * $id = $dbw->insertId();
+ */
function insertId() { return mysql_insert_id( $this->mConn ); }
+
+ /**
+ * 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 lastErrno() { return mysql_errno(); }
- function lastError() { return mysql_error(); }
- function affectedRows() { return mysql_affected_rows( $this->mConn ); }
- # Simple UPDATE wrapper
- # Usually aborts on failure
- # If errors are explicitly ignored, returns success
- function set( $table, $var, $value, $cond, $fname = "Database::set" )
- {
- $sql = "UPDATE $table SET $var = '" .
- wfStrencode( $value ) . "' WHERE ($cond)";
- return !!$this->query( $sql, DB_WRITE, $fname );
+ /**
+ * Get the last error number
+ * See mysql_errno()
+ */
+ function lastErrno() {
+ if ( $this->mConn ) {
+ return mysql_errno( $this->mConn );
+ } else {
+ return mysql_errno();
+ }
}
- # Simple SELECT wrapper, returns a single field, input must be encoded
- # Usually aborts on failure
- # If errors are explicitly ignored, returns FALSE on failure
- function get( $table, $var, $cond, $fname = "Database::get" )
+ /**
+ * Get a description of the last error
+ * See mysql_error() for more details
+ */
+ function lastError() {
+ if ( $this->mConn ) {
+ $error = mysql_error( $this->mConn );
+ } else {
+ $error = mysql_error();
+ }
+ if( $error ) {
+ $error .= ' (' . $this->mServer . ')';
+ }
+ return $error;
+ }
+ /**
+ * Get the number of rows affected by the last write query
+ * See mysql_affected_rows() for more details
+ */
+ function affectedRows() { return mysql_affected_rows( $this->mConn ); }
+ /**#@-*/ // end of template : @param $result
+
+ /**
+ * Simple UPDATE wrapper
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns success
+ *
+ * This function exists for historical reasons, Database::update() has a more standard
+ * calling convention and feature set
+ */
+ function set( $table, $var, $value, $cond, $fname = 'Database::set' )
{
- $sql = "SELECT $var FROM $table WHERE ($cond)";
- $result = $this->query( $sql, DB_READ, $fname );
+ $table = $this->tableName( $table );
+ $sql = "UPDATE $table SET $var = '" .
+ $this->strencode( $value ) . "' WHERE ($cond)";
+ return !!$this->query( $sql, DB_MASTER, $fname );
+ }
- $ret = "";
- if ( mysql_num_rows( $result ) > 0 ) {
- $s = mysql_fetch_object( $result );
- $ret = $s->$var;
- mysql_free_result( $result );
+ /**
+ * Simple SELECT wrapper, returns a single field, input must be encoded
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns FALSE on failure
+ */
+ function selectField( $table, $var, $cond='', $fname = 'Database::selectField', $options = array() ) {
+ if ( !is_array( $options ) ) {
+ $options = array( $options );
+ }
+ $options['LIMIT'] = 1;
+
+ $res = $this->select( $table, $var, $cond, $fname, $options );
+ if ( $res === false || !$this->numRows( $res ) ) {
+ return false;
+ }
+ $row = $this->fetchRow( $res );
+ if ( $row !== false ) {
+ $this->freeResult( $res );
+ return $row[0];
+ } else {
+ return false;
}
- return $ret;
}
- # More complex SELECT wrapper, single row only
- # Aborts or returns FALSE on error
- # Takes an array of selected variables, and a condition map, which is ANDed
- # e.g. getArray( "cur", array( "cur_id" ), array( "cur_namespace" => 0, "cur_title" => "Astronomy" ) )
- # would return an object where $obj->cur_id is the ID of the Astronomy article
- function getArray( $table, $vars, $conds, $fname = "Database::getArray" )
+ /**
+ * Returns an optional USE INDEX clause to go after the table, and a
+ * string to go at the end of the query
+ */
+ function makeSelectOptions( $options ) {
+ if ( !is_array( $options ) ) {
+ $options = array( $options );
+ }
+
+ $tailOpts = '';
+
+ if ( isset( $options['ORDER BY'] ) ) {
+ $tailOpts .= " ORDER BY {$options['ORDER BY']}";
+ }
+ if ( isset( $options['LIMIT'] ) ) {
+ $tailOpts .= " LIMIT {$options['LIMIT']}";
+ }
+
+ if ( is_numeric( array_search( 'FOR UPDATE', $options ) ) ) {
+ $tailOpts .= ' FOR UPDATE';
+ }
+
+ if ( is_numeric( array_search( 'LOCK IN SHARE MODE', $options ) ) ) {
+ $tailOpts .= ' LOCK IN SHARE MODE';
+ }
+
+ if ( isset( $options['USE INDEX'] ) ) {
+ $useIndex = $this->useIndexClause( $options['USE INDEX'] );
+ } else {
+ $useIndex = '';
+ }
+ return array( $useIndex, $tailOpts );
+ }
+
+ /**
+ * SELECT wrapper
+ */
+ function select( $table, $vars, $conds='', $fname = 'Database::select', $options = array() )
{
- $vars = implode( ",", $vars );
- $where = Database::makeList( $conds, LIST_AND );
- $sql = "SELECT $vars FROM $table WHERE $where LIMIT 1";
- $res = $this->query( $sql, $fname );
+ if( is_array( $vars ) ) {
+ $vars = implode( ',', $vars );
+ }
+ if( is_array( $table ) ) {
+ $from = ' FROM ' . implode( ',', array_map( array( &$this, 'tableName' ), $table ) );
+ } elseif ($table!='') {
+ $from = ' FROM ' .$this->tableName( $table );
+ } else {
+ $from = '';
+ }
+
+ list( $useIndex, $tailOpts ) = $this->makeSelectOptions( $options );
+
+ if( !empty( $conds ) ) {
+ if ( is_array( $conds ) ) {
+ $conds = $this->makeList( $conds, LIST_AND );
+ }
+ $sql = "SELECT $vars $from $useIndex WHERE $conds $tailOpts";
+ } else {
+ $sql = "SELECT $vars $from $useIndex $tailOpts";
+ }
+ return $this->query( $sql, $fname );
+ }
+
+ /**
+ * Single row SELECT wrapper
+ * Aborts or returns FALSE on error
+ *
+ * $vars: the selected variables
+ * $conds: a condition map, terms are ANDed together.
+ * Items with numeric keys are taken to be literal conditions
+ * Takes an array of selected variables, and a condition map, which is ANDed
+ * e.g: selectRow( "page", array( "page_id" ), array( "page_namespace" =>
+ * NS_MAIN, "page_title" => "Astronomy" ) ) would return an object where
+ * $obj- >page_id is the ID of the Astronomy article
+ *
+ * @todo migrate documentation to phpdocumentor format
+ */
+ function selectRow( $table, $vars, $conds, $fname = 'Database::selectRow', $options = array() ) {
+ $options['LIMIT'] = 1;
+ $res = $this->select( $table, $vars, $conds, $fname, $options );
if ( $res === false || !$this->numRows( $res ) ) {
return false;
}
$obj = $this->fetchObject( $res );
$this->freeResult( $res );
return $obj;
+
}
- # Removes most variables from an SQL query and replaces them with X or N for numbers.
- # It's only slightly flawed. Don't use for anything important.
- /* static */ function generalizeSQL( $sql )
- {
+ /**
+ * Removes most variables from an SQL query and replaces them with X or N for numbers.
+ * It's only slightly flawed. Don't use for anything important.
+ *
+ * @param string $sql A SQL Query
+ * @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 = str_replace ( "\\\\", "", $sql);
- $sql = str_replace ( "\\'", "", $sql);
- $sql = str_replace ( "\\\"", "", $sql);
+ $sql = str_replace ( "\\\\", '', $sql);
+ $sql = str_replace ( "\\'", '', $sql);
+ $sql = str_replace ( "\\\"", '', $sql);
$sql = preg_replace ("/'.*'/s", "'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);
+ $sql = preg_replace ('/-?[0-9]+/s', 'N', $sql);
return $sql;
}
- # Determines whether a field exists in a table
- # Usually aborts on failure
- # If errors are explicitly ignored, returns NULL on failure
- function fieldExists( $table, $field, $fname = "Database::fieldExists" )
- {
- $res = $this->query( "DESCRIBE $table", DB_READ, $fname );
+ /**
+ * Determines whether a field exists in a table
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns NULL on failure
+ */
+ function fieldExists( $table, $field, $fname = 'Database::fieldExists' ) {
+ $table = $this->tableName( $table );
+ $res = $this->query( 'DESCRIBE '.$table, DB_SLAVE, $fname );
if ( !$res ) {
return NULL;
}
return $found;
}
- # Determines whether an index exists
- # Usually aborts on failure
- # If errors are explicitly ignored, returns NULL on failure
- function indexExists( $table, $index, $fname = "Database::indexExists" )
- {
- $sql = "SHOW INDEXES FROM $table";
- $res = $this->query( $sql, DB_READ, $fname );
+ /**
+ * Determines whether an index exists
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns NULL on failure
+ */
+ function indexExists( $table, $index, $fname = 'Database::indexExists' ) {
+ $info = $this->indexInfo( $table, $index, $fname );
+ if ( is_null( $info ) ) {
+ return NULL;
+ } else {
+ return $info !== false;
+ }
+ }
+
+
+ /**
+ * Get information about an index into an object
+ * Returns false if the index does not exist
+ */
+ function indexInfo( $table, $index, $fname = 'Database::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 );
+ $sql = 'SHOW INDEX FROM '.$table;
+ $res = $this->query( $sql, $fname );
if ( !$res ) {
return NULL;
}
- $found = false;
-
while ( $row = $this->fetchObject( $res ) ) {
if ( $row->Key_name == $index ) {
- $found = true;
- break;
+ return $row;
}
}
- return $found;
+ return false;
}
- function tableExists( $table )
- {
- $old = $this->mIgnoreErrors;
- $this->mIgnoreErrors = true;
+ /**
+ * Query whether a given table exists
+ */
+ function tableExists( $table ) {
+ $table = $this->tableName( $table );
+ $old = $this->ignoreErrors( true );
$res = $this->query( "SELECT 1 FROM $table LIMIT 1" );
- $this->mIgnoreErrors = $old;
+ $this->ignoreErrors( $old );
if( $res ) {
$this->freeResult( $res );
return true;
}
}
- function fieldInfo( $table, $field )
- {
+ /**
+ * mysql_fetch_field() wrapper
+ * Returns false if the field doesn't exist
+ *
+ * @param $table
+ * @param $field
+ */
+ function fieldInfo( $table, $field ) {
+ $table = $this->tableName( $table );
$res = $this->query( "SELECT * FROM $table LIMIT 1" );
$n = mysql_num_fields( $res );
for( $i = 0; $i < $n; $i++ ) {
}
return false;
}
+
+ /**
+ * mysql_field_type() wrapper
+ */
+ function fieldType( $res, $index ) {
+ return mysql_field_type( $res, $index );
+ }
- # INSERT wrapper, inserts an array into a table
- # Keys are field names, values are values
- # Usually aborts on failure
- # If errors are explicitly ignored, returns success
- function insertArray( $table, $a, $fname = "Database::insertArray" )
- {
- $sql1 = "INSERT INTO $table (";
- $sql2 = "VALUES (" . Database::makeList( $a );
- $first = true;
- foreach ( $a as $field => $value ) {
- if ( !$first ) {
- $sql1 .= ",";
+ /**
+ * Determines if a given index is unique
+ */
+ function indexUnique( $table, $index ) {
+ $indexInfo = $this->indexInfo( $table, $index );
+ if ( !$indexInfo ) {
+ return NULL;
+ }
+ return !$indexInfo->Non_unique;
+ }
+
+ /**
+ * INSERT wrapper, inserts an array into a table
+ *
+ * $a may be a single associative array, or an array of these with numeric keys, for
+ * multi-row insert.
+ *
+ * Usually aborts on failure
+ * If errors are explicitly ignored, returns success
+ */
+ function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
+ # No rows to insert, easy just return now
+ if ( !count( $a ) ) {
+ return true;
+ }
+
+ $table = $this->tableName( $table );
+ if ( !is_array( $options ) ) {
+ $options = array( $options );
+ }
+ if ( isset( $a[0] ) && is_array( $a[0] ) ) {
+ $multi = true;
+ $keys = array_keys( $a[0] );
+ } else {
+ $multi = false;
+ $keys = array_keys( $a );
+ }
+
+ $sql = 'INSERT ' . implode( ' ', $options ) .
+ " INTO $table (" . implode( ',', $keys ) . ') VALUES ';
+
+ if ( $multi ) {
+ $first = true;
+ foreach ( $a as $row ) {
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= '(' . $this->makeList( $row ) . ')';
}
- $first = false;
- $sql1 .= $field;
+ } else {
+ $sql .= '(' . $this->makeList( $a ) . ')';
}
- $sql = "$sql1) $sql2)";
return !!$this->query( $sql, $fname );
}
-
- # A cross between insertArray and getArray, takes a condition array and a SET array
- function updateArray( $table, $values, $conds, $fname = "Database::updateArray" )
- {
+
+ /**
+ * UPDATE wrapper, takes a condition array and a SET array
+ */
+ function update( $table, $values, $conds, $fname = 'Database::update' ) {
+ $table = $this->tableName( $table );
$sql = "UPDATE $table SET " . $this->makeList( $values, LIST_SET );
$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
$this->query( $sql, $fname );
}
- # Makes a wfStrencoded list from an array
- # $mode: LIST_COMMA - comma separated, no field names
- # LIST_AND - ANDed WHERE clause (without the WHERE)
- # LIST_SET - comma separated with field names, like a SET clause
- /* static */ function makeList( $a, $mode = LIST_COMMA )
- {
+ /**
+ * Makes a wfStrencoded list from an array
+ * $mode: LIST_COMMA - comma separated, no field names
+ * LIST_AND - ANDed WHERE clause (without the WHERE)
+ * LIST_SET - comma separated with field names, like a SET clause
+ * LIST_NAMES - comma separated field names
+ */
+ function makeList( $a, $mode = LIST_COMMA ) {
+ if ( !is_array( $a ) ) {
+ wfDebugDieBacktrace( 'Database::makeList called with incorrect parameters' );
+ }
+
$first = true;
- $list = "";
+ $list = '';
foreach ( $a as $field => $value ) {
if ( !$first ) {
if ( $mode == LIST_AND ) {
- $list .= " AND ";
+ $list .= ' AND ';
} else {
- $list .= ",";
+ $list .= ',';
}
} else {
$first = false;
}
- if ( $mode == LIST_AND || $mode == LIST_SET ) {
- $list .= "$field=";
- }
- if ( !is_numeric( $value ) ) {
- $list .= "'" . wfStrencode( $value ) . "'";
+ if ( $mode == LIST_AND && is_numeric( $field ) ) {
+ $list .= "($value)";
+ } elseif ( $mode == LIST_AND && is_array ($value) ) {
+ $list .= $field." IN (".$this->makeList($value).") ";
} else {
- $list .= $value;
+ if ( $mode == LIST_AND || $mode == LIST_SET ) {
+ $list .= $field.'=';
+ }
+ $list .= ($mode==LIST_NAMES?$value:$this->addQuotes( $value ));
}
}
return $list;
}
- function selectDB( $db )
- {
+ /**
+ * Change the current database
+ */
+ function selectDB( $db ) {
$this->mDBname = $db;
- mysql_select_db( $db, $this->mConn );
+ return mysql_select_db( $db, $this->mConn );
}
- function startTimer( $timeout )
- {
+ /**
+ * Starts a timer which will kill the DB thread after $timeout seconds
+ */
+ function startTimer( $timeout ) {
global $IP;
+ if( function_exists( 'mysql_thread_id' ) ) {
+ # This will kill the query if it's still running after $timeout seconds.
+ $tid = mysql_thread_id( $this->mConn );
+ exec( "php $IP/includes/killthread.php $timeout $tid &>/dev/null &" );
+ }
+ }
+
+ /**
+ * Stop a timer started by startTimer()
+ * Currently unimplemented.
+ *
+ */
+ function stopTimer() { }
- $tid = mysql_thread_id( $this->mConn );
- exec( "php $IP/killthread.php $timeout $tid &>/dev/null &" );
+ /**
+ * Format a table name ready for use in constructing an SQL query
+ *
+ * This does two important things: it quotes table names which as necessary,
+ * and it adds a table prefix if there is one.
+ *
+ * All functions of this object which require a table name call this function
+ * themselves. Pass the canonical name to such functions. This is only needed
+ * when calling query() directly.
+ *
+ * @param string $name database table name
+ */
+ function tableName( $name ) {
+ global $wgSharedDB;
+ if ( $this->mTablePrefix !== '' ) {
+ if ( strpos( '.', $name ) === false ) {
+ $name = $this->mTablePrefix . $name;
+ }
+ }
+ if ( isset( $wgSharedDB ) && 'user' == $name ) {
+ $name = $wgSharedDB . '.' . $name;
+ }
+ if( $name == 'group' ) {
+ $name = '`' . $name . '`';
+ }
+ return $name;
}
- function stopTimer()
- {
+ /**
+ * Fetch a number of table names into an array
+ * This is handy when you need to construct SQL for joins
+ *
+ * Example:
+ * extract($dbr->tableNames('user','watchlist'));
+ * $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
+ * WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
+ */
+ function tableNames() {
+ $inArray = func_get_args();
+ $retVal = array();
+ foreach ( $inArray as $name ) {
+ $retVal[$name] = $this->tableName( $name );
+ }
+ return $retVal;
+ }
+
+ /**
+ * Wrapper for addslashes()
+ * @param string $s String to be slashed.
+ * @return string slashed string.
+ */
+ function strencode( $s ) {
+ return addslashes( $s );
+ }
+
+ /**
+ * If it's a string, adds quotes and backslashes
+ * Otherwise returns as-is
+ */
+ function addQuotes( $s ) {
+ if ( is_null( $s ) ) {
+ $s = 'NULL';
+ } else {
+ # This will also quote numeric values. This should be harmless,
+ # and protects against weird problems that occur when they really
+ # _are_ strings such as article titles and string->number->string
+ # conversion is not 1:1.
+ $s = "'" . $this->strencode( $s ) . "'";
+ }
+ return $s;
+ }
+
+ /**
+ * Returns an appropriately quoted sequence value for inserting a new row.
+ * MySQL has autoincrement fields, so this is just NULL. But the PostgreSQL
+ * subclass will return an integer, and save the value for insertId()
+ */
+ function nextSequenceValue( $seqName ) {
+ return NULL;
+ }
+
+ /**
+ * USE INDEX clause
+ * PostgreSQL doesn't have them and returns ""
+ */
+ function useIndexClause( $index ) {
+ return 'USE INDEX ('.$index.')';
+ }
+
+ /**
+ * REPLACE query wrapper
+ * PostgreSQL simulates this with a DELETE followed by INSERT
+ * $row is the row to insert, an associative array
+ * $uniqueIndexes is an array of indexes. Each element may be either a
+ * field name or an array of field names
+ *
+ * It may be more efficient to leave off unique indexes which are unlikely to collide.
+ * However if you do this, you run the risk of encountering errors which wouldn't have
+ * occurred in MySQL
+ *
+ * @todo migrate comment to phodocumentor format
+ */
+ function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
+ $table = $this->tableName( $table );
+
+ # Single row case
+ if ( !is_array( reset( $rows ) ) ) {
+ $rows = array( $rows );
+ }
+
+ $sql = "REPLACE INTO $table (" . implode( ',', array_keys( $rows[0] ) ) .') VALUES ';
+ $first = true;
+ foreach ( $rows as $row ) {
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= '(' . $this->makeList( $row ) . ')';
+ }
+ return $this->query( $sql, $fname );
+ }
+
+ /**
+ * DELETE where the condition is a join
+ * MySQL does this with a multi-table DELETE syntax, PostgreSQL does it with sub-selects
+ *
+ * For safety, an empty $conds will not delete everything. If you want to delete all rows where the
+ * join condition matches, set $conds='*'
+ *
+ * DO NOT put the join condition in $conds
+ *
+ * @param string $delTable The table to delete from.
+ * @param string $joinTable The other table.
+ * @param string $delVar The variable to join on, in the first table.
+ * @param string $joinVar The variable to join on, in the second table.
+ * @param array $conds Condition array of field names mapped to variables, ANDed together in the WHERE clause
+ */
+ function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'Database::deleteJoin' ) {
+ if ( !$conds ) {
+ wfDebugDieBacktrace( 'Database::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 );
+ }
+
+ /**
+ * Returns the size of a text field, or -1 for "unlimited"
+ */
+ function textFieldSize( $table, $field ) {
+ $table = $this->tableName( $table );
+ $sql = "SHOW COLUMNS FROM $table LIKE \"$field\";";
+ $res = $this->query( $sql, 'Database::textFieldSize' );
+ $row = $this->fetchObject( $res );
+ $this->freeResult( $res );
+
+ if ( preg_match( "/\((.*)\)/", $row->Type, $m ) ) {
+ $size = $m[1];
+ } else {
+ $size = -1;
+ }
+ return $size;
+ }
+
+ /**
+ * @return string Always return 'LOW_PRIORITY'
+ */
+ function lowPriorityOption() {
+ return 'LOW_PRIORITY';
+ }
+
+ /**
+ * DELETE query wrapper
+ *
+ * Use $conds == "*" to delete all rows
+ */
+ function delete( $table, $conds, $fname = 'Database::delete' ) {
+ if ( !$conds ) {
+ wfDebugDieBacktrace( 'Database::delete() called with no conditions' );
+ }
+ $table = $this->tableName( $table );
+ $sql = "DELETE FROM $table ";
+ if ( $conds != '*' ) {
+ $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
+ }
+ return $this->query( $sql, $fname );
+ }
+
+ /**
+ * INSERT SELECT wrapper
+ * $varMap must be an associative array of the form array( 'dest1' => 'source1', ...)
+ * Source items may be literals rather than field names, but strings should be quoted with Database::addQuotes()
+ * $conds may be "*" to copy the whole table
+ * srcTable may be an array of tables.
+ */
+ function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'Database::insertSelect' ) {
+ $destTable = $this->tableName( $destTable );
+ if( is_array( $srcTable ) ) {
+ $srcTable = implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
+ } else {
+ $srcTable = $this->tableName( $srcTable );
+ }
+ $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
+ ' SELECT ' . implode( ',', $varMap ) .
+ " FROM $srcTable";
+ if ( $conds != '*' ) {
+ $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
+ }
+ return $this->query( $sql, $fname );
+ }
+
+ /**
+ * Construct a LIMIT query with optional offset
+ * This is used for query pages
+ */
+ function limitResult($limit,$offset) {
+ return ' LIMIT '.(is_numeric($offset)?"{$offset},":"")."{$limit} ";
+ }
+
+ /**
+ * Returns an SQL expression for a simple conditional.
+ * Uses IF on MySQL.
+ *
+ * @param string $cond SQL expression which will result in a boolean value
+ * @param string $trueVal SQL expression to return if true
+ * @param string $falseVal SQL expression to return if false
+ * @return string SQL fragment
+ */
+ function conditional( $cond, $trueVal, $falseVal ) {
+ return " IF($cond, $trueVal, $falseVal) ";
+ }
+
+ /**
+ * Determines if the last failure was due to a deadlock
+ */
+ function wasDeadlock() {
+ return $this->lastErrno() == 1213;
+ }
+
+ /**
+ * Perform a deadlock-prone transaction.
+ *
+ * This function invokes a callback function to perform a set of write
+ * queries. If a deadlock occurs during the processing, the transaction
+ * will be rolled back and the callback function will be called again.
+ *
+ * Usage:
+ * $dbw->deadlockLoop( callback, ... );
+ *
+ * Extra arguments are passed through to the specified callback function.
+ *
+ * Returns whatever the callback function returned on its successful,
+ * iteration, or false on error, for example if the retry limit was
+ * reached.
+ */
+ function deadlockLoop() {
+ $myFname = 'Database::deadlockLoop';
+
+ $this->query( 'BEGIN', $myFname );
+ $args = func_get_args();
+ $function = array_shift( $args );
+ $oldIgnore = $this->ignoreErrors( true );
+ $tries = DEADLOCK_TRIES;
+ if ( is_array( $function ) ) {
+ $fname = $function[0];
+ } else {
+ $fname = $function;
+ }
+ do {
+ $retVal = call_user_func_array( $function, $args );
+ $error = $this->lastError();
+ $errno = $this->lastErrno();
+ $sql = $this->lastQuery();
+
+ if ( $errno ) {
+ if ( $this->wasDeadlock() ) {
+ # Retry
+ usleep( mt_rand( DEADLOCK_DELAY_MIN, DEADLOCK_DELAY_MAX ) );
+ } else {
+ $this->reportQueryError( $error, $errno, $sql, $fname );
+ }
+ }
+ } while( $this->wasDeadlock() && --$tries > 0 );
+ $this->ignoreErrors( $oldIgnore );
+ if ( $tries <= 0 ) {
+ $this->query( 'ROLLBACK', $myFname );
+ $this->reportQueryError( $error, $errno, $sql, $fname );
+ return false;
+ } else {
+ $this->query( 'COMMIT', $myFname );
+ return $retVal;
+ }
+ }
+
+ /**
+ * Do a SELECT MASTER_POS_WAIT()
+ *
+ * @param string $file the binlog file
+ * @param string $pos the binlog position
+ * @param integer $timeout the maximum number of seconds to wait for synchronisation
+ */
+ function masterPosWait( $file, $pos, $timeout ) {
+ $fname = 'Database::masterPosWait';
+ wfProfileIn( $fname );
+
+
+ # Commit any open transactions
+ $this->immediateCommit();
+
+ # Call doQuery() directly, to avoid opening a transaction if DBO_TRX is set
+ $encFile = $this->strencode( $file );
+ $sql = "SELECT MASTER_POS_WAIT('$encFile', $pos, $timeout)";
+ $res = $this->doQuery( $sql );
+ if ( $res && $row = $this->fetchRow( $res ) ) {
+ $this->freeResult( $res );
+ return $row[0];
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Get the position of the master from SHOW SLAVE STATUS
+ */
+ function getSlavePos() {
+ $res = $this->query( 'SHOW SLAVE STATUS', 'Database::getSlavePos' );
+ $row = $this->fetchObject( $res );
+ if ( $row ) {
+ return array( $row->Master_Log_File, $row->Read_Master_Log_Pos );
+ } else {
+ return array( false, false );
+ }
+ }
+
+ /**
+ * Get the position of the master from SHOW MASTER STATUS
+ */
+ function getMasterPos() {
+ $res = $this->query( 'SHOW MASTER STATUS', 'Database::getMasterPos' );
+ $row = $this->fetchObject( $res );
+ if ( $row ) {
+ return array( $row->File, $row->Position );
+ } else {
+ return array( false, false );
+ }
+ }
+
+ /**
+ * Begin a transaction, or if a transaction has already started, continue it
+ */
+ function begin( $fname = 'Database::begin' ) {
+ if ( !$this->mTrxLevel ) {
+ $this->immediateBegin( $fname );
+ } else {
+ $this->mTrxLevel++;
+ }
+ }
+
+ /**
+ * End a transaction, or decrement the nest level if transactions are nested
+ */
+ function commit( $fname = 'Database::commit' ) {
+ if ( $this->mTrxLevel ) {
+ $this->mTrxLevel--;
+ }
+ if ( !$this->mTrxLevel ) {
+ $this->immediateCommit( $fname );
+ }
+ }
+
+ /**
+ * Rollback a transaction
+ */
+ function rollback( $fname = 'Database::rollback' ) {
+ $this->query( 'ROLLBACK', $fname );
+ $this->mTrxLevel = 0;
+ }
+
+ /**
+ * Begin a transaction, committing any previously open transaction
+ */
+ function immediateBegin( $fname = 'Database::immediateBegin' ) {
+ $this->query( 'BEGIN', $fname );
+ $this->mTrxLevel = 1;
+ }
+
+ /**
+ * Commit transaction, if one is open
+ */
+ function immediateCommit( $fname = 'Database::immediateCommit' ) {
+ $this->query( 'COMMIT', $fname );
+ $this->mTrxLevel = 0;
+ }
+
+ /**
+ * Return MW-style timestamp used for MySQL schema
+ */
+ function timestamp( $ts=0 ) {
+ return wfTimestamp(TS_MW,$ts);
+ }
+
+ /**
+ * @todo document
+ */
+ function &resultObject( &$result ) {
+ if( empty( $result ) ) {
+ return NULL;
+ } else {
+ return new ResultWrapper( $this, $result );
+ }
+ }
+
+ /**
+ * Return aggregated value alias
+ */
+ function aggregateValue ($valuedata,$valuename='value') {
+ return $valuename;
+ }
+
+ /**
+ * @return string wikitext of a link to the server software's web site
+ */
+ function getSoftwareLink() {
+ return "[http://www.mysql.com/ MySQL]";
}
+
+ /**
+ * @return string Version information from the database
+ */
+ function getServerVersion() {
+ return mysql_get_server_info();
+ }
+}
+
+/**
+ * Database abstraction object for mySQL
+ * Inherit all methods and properties of Database::Database()
+ *
+ * @package MediaWiki
+ * @see Database
+ */
+class DatabaseMysql extends Database {
+ # Inherit all
+}
+
+/**
+ * Result wrapper for grabbing data queried by someone else
+ *
+ * @package MediaWiki
+ */
+class ResultWrapper {
+ var $db, $result;
+
+ /**
+ * @todo document
+ */
+ function ResultWrapper( $database, $result ) {
+ $this->db =& $database;
+ $this->result =& $result;
+ }
+
+ /**
+ * @todo document
+ */
+ function numRows() {
+ return $this->db->numRows( $this->result );
+ }
+
+ /**
+ * @todo document
+ */
+ function &fetchObject() {
+ return $this->db->fetchObject( $this->result );
+ }
+
+ /**
+ * @todo document
+ */
+ function &fetchRow() {
+ return $this->db->fetchRow( $this->result );
+ }
+
+ /**
+ * @todo document
+ */
+ function free() {
+ $this->db->freeResult( $this->result );
+ unset( $this->result );
+ unset( $this->db );
+ }
}
#------------------------------------------------------------------------------
# Global functions
#------------------------------------------------------------------------------
-/* Standard fail function, called by default when a connection cannot be established
- Displays the file cache if possible */
-function wfEmergencyAbort( &$conn ) {
+/**
+ * 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, $wgSiteNotice, $wgOutputEncoding;
+ global $wgSitename, $wgServer;
- header( "Content-type: text/html; charset=$wgOutputEncoding" );
+ # I give up, Brion is right. Getting the message cache to work when there is no DB is tricky.
+ # Hard coding strings instead.
+
+ $noconnect = 'Sorry! The wiki is experiencing some technical difficulties, and cannot contact the database server. <br />
+$1';
+ $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 -->";
+ $cachederror = "The following is a cached copy of the requested page, and may not be up to date. ";
+
+
+ if( !headers_sent() ) {
+ header( 'HTTP/1.0 500 Internal Server Error' );
+ header( 'Content-type: text/html; charset='.$wgOutputEncoding );
+ /* Don't cache error pages! They cause no end of trouble... */
+ header( 'Cache-control: none' );
+ header( 'Pragma: nocache' );
+ }
$msg = $wgSiteNotice;
- if($msg == "") $msg = wfMsgNoDB( "noconnect" );
+ if($msg == '') {
+ $msg = str_replace( '$1', $error, $noconnect );
+ }
$text = $msg;
if($wgUseFileCache) {
} else {
if($title) {
$t = Title::newFromURL( $title );
- } elseif (@$_REQUEST['search']) {
+ } elseif (@/**/$_REQUEST['search']) {
$search = $_REQUEST['search'];
- echo wfMsgNoDB( "searchdisabled" );
- echo wfMsgNoDB( "googlesearch", htmlspecialchars( $search ), $wgInputEncoding );
- wfAbruptExit();
+ echo $searchdisabled;
+ echo str_replace( array( '$1', '$2' ), array( htmlspecialchars( $search ),
+ $wgInputEncoding ), $googlesearch );
+ wfErrorExit();
} else {
- $t = Title::newFromText( wfMsgNoDB( "mainpage" ) );
+ $t = Title::newFromText( $mainpage );
}
}
$cache = new CacheManager( $t );
if( $cache->isFileCached() ) {
- $msg = "<p style='color: red'><b>$msg<br />\n" .
- wfMsgNoDB( "cachederror" ) . "</b></p>\n";
+ $msg = '<p style="color: red"><b>'.$msg."<br />\n" .
+ $cachederror . "</b></p>\n";
- $tag = "<div id='article'>";
+ $tag = '<div id="article">';
$text = str_replace(
$tag,
$tag . $msg,
}
}
- /* Don't cache error pages! They cause no end of trouble... */
- header( "Cache-control: none" );
- header( "Pragma: nocache" );
echo $text;
- wfAbruptExit();
-}
-
-function wfStrencode( $s )
-{
- return addslashes( $s );
-}
-
-# Ideally we'd be using actual time fields in the db
-function wfTimestamp2Unix( $ts ) {
- return gmmktime( ( (int)substr( $ts, 8, 2) ),
- (int)substr( $ts, 10, 2 ), (int)substr( $ts, 12, 2 ),
- (int)substr( $ts, 4, 2 ), (int)substr( $ts, 6, 2 ),
- (int)substr( $ts, 0, 4 ) );
+ wfErrorExit();
}
-function wfUnix2Timestamp( $unixtime ) {
- return gmdate( "YmdHis", $unixtime );
-}
-
-function wfTimestampNow() {
- # return NOW
- return gmdate( "YmdHis" );
-}
-
-# Sorting hack for MySQL 3, which doesn't use index sorts for DESC
-function wfInvertTimestamp( $ts ) {
- return strtr(
- $ts,
- "0123456789",
- "9876543210"
- );
-}
?>
dépôts / lhc / web / wiklou.git / blobdiff