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*/ $this->mTablePrefix = $tablePrefix == 'get from global' ? $wgDBprefix : $tablePrefix; if ($server) $this->open($server, $user, $password, $dbName); } /** * todo: check if these should be true like parent class */ function implicitGroupby() { return false; } function implicitOrderby() { return false; } static function newFromParams($server, $user, $password, $dbName, $failFunction = false, $flags = 0) { return new DatabaseMssql($server, $user, $password, $dbName, $failFunction, $flags); } /** Open an MSSQL database and return a resource handle to it * NOTE: only $dbName is used, the other parameters are irrelevant for MSSQL databases */ function open($server,$user,$password,$dbName) { wfProfileIn(__METHOD__); # Test for missing mysql.so # First try to load it if (!@extension_loaded('mssql')) { @dl('mssql.so'); } # Fail now # Otherwise we get a suppressed fatal error, which is very hard to track down if (!function_exists( 'mssql_connect')) { throw new DBConnectionError( $this, "MSSQL functions missing, have you compiled PHP with the --with-mssql option?\n" ); } $this->close(); $this->mServer = $server; $this->mUser = $user; $this->mPassword = $password; $this->mDBname = $dbName; wfProfileIn("dbconnect-$server"); # Try to connect up to three times # The kernel's default SYN retransmission period is far too slow for us, # so we use a short timeout plus a manual retry. $this->mConn = false; $max = 3; for ( $i = 0; $i < $max && !$this->mConn; $i++ ) { if ( $i > 1 ) { usleep( 1000 ); } if ($this->mFlags & DBO_PERSISTENT) { @/**/$this->mConn = mssql_pconnect($server, $user, $password); } else { # Create a new connection... @/**/$this->mConn = mssql_connect($server, $user, $password, true); } } wfProfileOut("dbconnect-$server"); if ($dbName != '') { if ($this->mConn !== false) { $success = @/**/mssql_select_db($dbName, $this->mConn); if (!$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 { wfDebug("DB connection error\n"); wfDebug("Server: $server, User: $user, Password: ".substr($password, 0, 3)."...\n"); $success = false; } } else { # Delay USE query $success = (bool)$this->mConn; } if (!$success) $this->reportConnectionError(); $this->mOpened = $success; wfProfileOut(__METHOD__); return $success; } /** * Close an MSSQL database */ function close() { $this->mOpened = false; if ($this->mConn) { if ($this->trxLevel()) $this->immediateCommit(); return mssql_close($this->mConn); } else return true; } /** * - MSSQL doesn't seem to do buffered results * - the trasnaction syntax is modified here to avoid having to replicate * Database::query which uses BEGIN, COMMIT, ROLLBACK */ function doQuery($sql) { if ($sql == 'BEGIN' || $sql == 'COMMIT' || $sql == 'ROLLBACK') return true; # $sql .= ' TRANSACTION'; $sql = preg_replace('|[^\x07-\x7e]|','?',$sql); # TODO: need to fix unicode - just removing it here while testing $ret = mssql_query($sql, $this->mConn); if ($ret === false) { $err = mssql_get_last_message(); if ($err) $this->mlastError = $err; $row = mssql_fetch_row(mssql_query('select @@ERROR')); if ($row[0]) $this->mlastErrorNo = $row[0]; } else $this->mlastErrorNo = false; return $ret; } /**#@+ * @param mixed $res A SQL result */ /** * Free a result object */ function freeResult( $res ) { if ( $res instanceof ResultWrapper ) { $res = $res->result; } if ( !@/**/mssql_free_result( $res ) ) { throw new DBUnexpectedError( $this, "Unable to free MSSQL result" ); } } /** * 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 = mssql_fetch_object( $res ); if ( $this->lastErrno() ) { throw new DBUnexpectedError( $this, 'Error in fetchObject(): ' . htmlspecialchars( $this->lastError() ) ); } return $row; } /** * 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 = mssql_fetch_array( $res ); 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 = mssql_num_rows( $res ); 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 ) { if ( $res instanceof ResultWrapper ) { $res = $res->result; } return mssql_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 ) { if ( $res instanceof ResultWrapper ) { $res = $res->result; } return mssql_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() { $row = mssql_fetch_row(mssql_query('select @@IDENTITY')); return $row[0]; } /** * Change the position of the cursor in a result object * See mysql_data_seek() */ function dataSeek( $res, $row ) { if ( $res instanceof ResultWrapper ) { $res = $res->result; } return mssql_data_seek( $res, $row ); } /** * Get the last error number */ function lastErrno() { return $this->mlastErrorNo; } /** * Get a description of the last error */ function lastError() { return $this->mlastError; } /** * Get the number of rows affected by the last write query */ function affectedRows() { return mssql_rows_affected( $this->mConn ); } /** * 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, $fname = 'Database::set' ) { if ($value == "NULL") $value = "''"; # see comments in makeListWithoutNulls() $table = $this->tableName( $table ); $sql = "UPDATE $table SET $var = '" . $this->strencode( $value ) . "' WHERE ($cond)"; return (bool)$this->query( $sql, $fname ); } /** * 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; } } /** * Returns an optional USE INDEX clause to go after the table, and a * string to go at the end of the query * * @private * * @param array $options an associative array of options to be turned into * an SQL query, valid keys are listed in the function. * @return array */ function makeSelectOptions( $options ) { $preLimitTail = $postLimitTail = ''; $startOpts = ''; $noKeyOptions = array(); foreach ( $options as $key => $option ) { if ( is_numeric( $key ) ) { $noKeyOptions[$option] = true; } } 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( $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'; if ( isset( $noKeyOptions['SQL_SMALL_RESULT'] ) ) $startOpts .= ' SQL_SMALL_RESULT'; if ( isset( $noKeyOptions['SQL_CALC_FOUND_ROWS'] ) ) $startOpts .= ' SQL_CALC_FOUND_ROWS'; if ( isset( $noKeyOptions['SQL_CACHE'] ) ) $startOpts .= ' SQL_CACHE'; if ( isset( $noKeyOptions['SQL_NO_CACHE'] ) ) $startOpts .= ' SQL_NO_CACHE'; if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) { $useIndex = $this->useIndexClause( $options['USE INDEX'] ); } else { $useIndex = ''; } 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() ) { if( is_array( $vars ) ) { $vars = implode( ',', $vars ); } if( !is_array( $options ) ) { $options = array( $options ); } if( is_array( $table ) ) { 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!='') { if ($table{0}==' ') { $from = ' FROM ' . $table; } else { $from = ' FROM ' . $this->tableName( $table ); } } else { $from = ''; } 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 $preLimitTail"; } else { $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 ); } /** * 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() ) { $rows = 0; $res = $this->select ($table, 'COUNT(*)', $conds, $fname, $options ); if ($res) { $row = $this->fetchObject($res); $rows = $row[0]; } $this->freeResult($res); return $rows; } /** * 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 ); $sql = "SELECT TOP 1 * FROM $table"; $res = $this->query( $sql, 'Database::fieldExists' ); $found = false; while ( $row = $this->fetchArray( $res ) ) { if ( isset($row[$field]) ) { $found = true; break; } } $this->freeResult( $res ); return $found; } /** * Get information about an index into an object * Returns false if the index does not exist */ function indexInfo( $table, $index, $fname = 'Database::indexInfo' ) { throw new DBUnexpectedError( $this, 'Database::indexInfo called which is not supported yet' ); return NULL; $table = $this->tableName( $table ); $sql = 'SHOW INDEX FROM '.$table; $res = $this->query( $sql, $fname ); if ( !$res ) { return NULL; } $result = array(); while ( $row = $this->fetchObject( $res ) ) { if ( $row->Key_name == $index ) { $result[] = $row; } } $this->freeResult($res); return empty($result) ? false : $result; } /** * Query whether a given table exists */ function tableExists( $table ) { $table = $this->tableName( $table ); $res = $this->query( "SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '$table'" ); $exist = ($res->numRows() > 0); $this->freeResult($res); return $exist; } /** * 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 TOP 1 * FROM $table" ); $n = mssql_num_fields( $res->result ); for( $i = 0; $i < $n; $i++ ) { $meta = mssql_fetch_field( $res->result, $i ); if( $field == $meta->name ) { return new MSSQLField($meta); } } return false; } /** * mysql_field_type() wrapper */ function fieldType( $res, $index ) { if ( $res instanceof ResultWrapper ) { $res = $res->result; } return mssql_field_type( $res, $index ); } /** * 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 * * Same as parent class implementation except that it removes primary key from column lists * because MSSQL doesn't support writing nulls to IDENTITY (AUTO_INCREMENT) columns */ 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 ); } # todo: need to record primary keys at table create time, and remove NULL assignments to them if ( isset( $a[0] ) && is_array( $a[0] ) ) { $multi = true; $keys = array_keys( $a[0] ); # if (ereg('_id$',$keys[0])) { foreach ($a as $i) { if (is_null($i[$keys[0]])) unset($i[$keys[0]]); # remove primary-key column from multiple insert lists if empty value } # } $keys = array_keys( $a[0] ); } else { $multi = false; $keys = array_keys( $a ); # if (ereg('_id$',$keys[0]) && empty($a[$keys[0]])) unset($a[$keys[0]]); # remove primary-key column from insert list if empty value if (is_null($a[$keys[0]])) unset($a[$keys[0]]); # remove primary-key column from insert list if empty value $keys = array_keys( $a ); } # handle IGNORE option # example: # MySQL: INSERT IGNORE INTO user_groups (ug_user,ug_group) VALUES ('1','sysop') # MSSQL: IF NOT EXISTS (SELECT * FROM user_groups WHERE ug_user = '1') INSERT INTO user_groups (ug_user,ug_group) VALUES ('1','sysop') $ignore = in_array('IGNORE',$options); # remove IGNORE from options list if ($ignore) { $oldoptions = $options; $options = array(); foreach ($oldoptions as $o) if ($o != 'IGNORE') $options[] = $o; } $keylist = implode(',', $keys); $sql = 'INSERT '.implode(' ', $options)." INTO $table (".implode(',', $keys).') VALUES '; if ($multi) { if ($ignore) { # If multiple and ignore, then do each row as a separate conditional insert foreach ($a as $row) { $prival = $row[$keys[0]]; $sql = "IF NOT EXISTS (SELECT * FROM $table WHERE $keys[0] = '$prival') $sql"; if (!$this->query("$sql (".$this->makeListWithoutNulls($row).')', $fname)) return false; } return true; } else { $first = true; foreach ($a as $row) { if ($first) $first = false; else $sql .= ','; $sql .= '('.$this->makeListWithoutNulls($row).')'; } } } else { if ($ignore) { $prival = $a[$keys[0]]; $sql = "IF NOT EXISTS (SELECT * FROM $table WHERE $keys[0] = '$prival') $sql"; } $sql .= '('.$this->makeListWithoutNulls($a).')'; } return (bool)$this->query( $sql, $fname ); } /** * MSSQL doesn't allow implicit casting of NULL's into non-null values for NOT NULL columns * for now I've just converted the NULL's in the lists for updates and inserts into empty strings * which get implicitly casted to 0 for numeric columns * NOTE: the set() method above converts NULL to empty string as well but not via this method */ function makeListWithoutNulls($a, $mode = LIST_COMMA) { return str_replace("NULL","''",$this->makeList($a,$mode)); } /** * UPDATE wrapper, takes a condition array and a SET array * * @param string $table The table to UPDATE * @param array $values An array of values to SET * @param array $conds An array of conditions (WHERE). Use '*' to update all rows. * @param string $fname The Class::Function calling this function * (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 ); $opts = $this->makeUpdateOptions( $options ); $sql = "UPDATE $opts $table SET " . $this->makeListWithoutNulls( $values, LIST_SET ); if ( $conds != '*' ) { $sql .= " WHERE " . $this->makeList( $conds, LIST_AND ); } return $this->query( $sql, $fname ); } /** * Make UPDATE options for the Database::update function * * @private * @param array $options The options passed to Database::update * @return string */ function makeUpdateOptions( $options ) { if( !is_array( $options ) ) { $options = array( $options ); } $opts = array(); if ( in_array( 'LOW_PRIORITY', $options ) ) $opts[] = $this->lowPriorityOption(); if ( in_array( 'IGNORE', $options ) ) $opts[] = 'IGNORE'; return implode(' ', $opts); } /** * Change the current database */ function selectDB( $db ) { $this->mDBname = $db; return mssql_select_db( $db, $this->mConn ); } /** * MSSQL has a problem with the backtick quoting, so all this does is ensure the prefix is added exactly once */ function tableName($name) { return strpos($name, $this->mTablePrefix) === 0 ? $name : "{$this->mTablePrefix}$name"; } /** * MSSQL doubles quotes instead of escaping them * @param string $s String to be slashed. * @return string slashed string. */ function strencode($s) { return str_replace("'","''",$s); } /** * USE INDEX clause */ function useIndexClause( $index ) { return ""; } /** * 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 ) { throw new DBUnexpectedError( $this, '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 = "SELECT TOP 1 * FROM $table;"; $res = $this->query( $sql, 'Database::textFieldSize' ); $row = $this->fetchObject( $res ); $this->freeResult( $res ); $m = array(); if ( preg_match( '/\((.*)\)/', $row->Type, $m ) ) { $size = $m[1]; } else { $size = -1; } return $size; } /** * @return string Returns the text of the low priority option if it is supported, or a blank string otherwise */ function lowPriorityOption() { return 'LOW_PRIORITY'; } /** * 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', $insertOptions = array(), $selectOptions = array() ) { $destTable = $this->tableName( $destTable ); if ( is_array( $insertOptions ) ) { $insertOptions = implode( ' ', $insertOptions ); } if( !is_array( $selectOptions ) ) { $selectOptions = array( $selectOptions ); } list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions ); if( is_array( $srcTable ) ) { $srcTable = implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) ); } else { $srcTable = $this->tableName( $srcTable ); } $sql = "INSERT $insertOptions INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' . " SELECT $startOpts " . implode( ',', $varMap ) . " FROM $srcTable $useIndex "; if ( $conds != '*' ) { $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND ); } $sql .= " $tailOpts"; return $this->query( $sql, $fname ); } /** * Construct a LIMIT query with optional offset * This is used for query pages * $sql string SQL query we will append the limit to * $limit integer the SQL limit * $offset integer the SQL offset (default false) */ function limitResult($sql, $limit, $offset=false) { if( !is_numeric($limit) ) { throw new DBUnexpectedError( $this, "Invalid non-numeric limit passed to limitResult()\n" ); } if ($offset) { throw new DBUnexpectedError( $this, 'Database::limitResult called with non-zero offset which is not supported yet' ); } else { $sql = ereg_replace("^SELECT", "SELECT TOP $limit", $sql); } return $sql; } /** * Returns an SQL expression for a simple conditional. * * @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 " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) "; } /** * Should determine if the last failure was due to a deadlock * @return bool */ function wasDeadlock() { return $this->lastErrno() == 1205; } /** * Begin a transaction, committing any previously open transaction * @deprecated use begin() */ function immediateBegin( $fname = 'Database::immediateBegin' ) { $this->begin(); } /** * Commit transaction, if one is open * @deprecated use commit() */ function immediateCommit( $fname = 'Database::immediateCommit' ) { $this->commit(); } /** * Return MW-style timestamp used for MySQL schema */ function timestamp( $ts=0 ) { return wfTimestamp(TS_MW,$ts); } /** * Local database timestamp format or null */ function timestampOrNull( $ts = null ) { if( is_null( $ts ) ) { return null; } else { return $this->timestamp( $ts ); } } /** * @return string wikitext of a link to the server software's web site */ function getSoftwareLink() { return "[http://www.microsoft.com/sql/default.mspx Microsoft SQL Server 2005 Home]"; } /** * @return string Version information from the database */ function getServerVersion() { $row = mssql_fetch_row(mssql_query('select @@VERSION')); return ereg("^(.+[0-9]+\\.[0-9]+\\.[0-9]+) ",$row[0],$m) ? $m[1] : $row[0]; } function limitResultForUpdate($sql, $num) { return $sql; } /** * not done */ public function setTimeout($timeout) { return; } function ping() { wfDebug("Function ping() not written for MSSQL yet"); return true; } /** * How lagged is this slave? */ public function getLag() { return 0; } /** * Called by the installer script * - this is the same way as DatabasePostgresql.php, MySQL reads in tables.sql and interwiki.sql using dbsource (which calls db->sourceFile) */ public function setup_database() { global $IP,$wgDBTableOptions; $wgDBTableOptions = ''; $mysql_tmpl = "$IP/maintenance/tables.sql"; $mysql_iw = "$IP/maintenance/interwiki.sql"; $mssql_tmpl = "$IP/maintenance/mssql/tables.sql"; # Make an MSSQL template file if it doesn't exist (based on the same one MySQL uses to create a new wiki db) if (!file_exists($mssql_tmpl)) { # todo: make this conditional again $sql = file_get_contents($mysql_tmpl); $sql = preg_replace('/^\s*--.*?$/m','',$sql); # strip comments $sql = preg_replace('/^\s*(UNIQUE )?(INDEX|KEY|FULLTEXT).+?$/m', '', $sql); # These indexes should be created with a CREATE INDEX query $sql = preg_replace('/(\sKEY) [^\(]+\(/is', '$1 (', $sql); # "KEY foo (foo)" should just be "KEY (foo)" $sql = preg_replace('/(varchar\([0-9]+\))\s+binary/i', '$1', $sql); # "varchar(n) binary" cannot be followed by "binary" $sql = preg_replace('/(var)?binary\(([0-9]+)\)/ie', '"varchar(".strlen(pow(2,$2)).")"', $sql); # use varchar(chars) not binary(bits) $sql = preg_replace('/ (var)?binary/i', ' varchar', $sql); # use varchar not binary $sql = preg_replace('/(varchar\([0-9]+\)(?! N))/', '$1 NULL', $sql); # MSSQL complains if NULL is put into a varchar #$sql = preg_replace('/ binary/i',' varchar',$sql); # MSSQL binary's can't be assigned with strings, so use varchar's instead #$sql = preg_replace('/(binary\([0-9]+\) (NOT NULL )?default) [\'"].*?[\'"]/i','$1 0',$sql); # binary default cannot be string $sql = preg_replace('/[a-z]*(blob|text)([ ,])/i', 'text$2', $sql); # no BLOB types in MSSQL $sql = preg_replace('/\).+?;/',');', $sql); # remove all table options $sql = preg_replace('/ (un)?signed/i', '', $sql); $sql = preg_replace('/ENUM\(.+?\)/','TEXT',$sql); # Make ENUM's into TEXT's $sql = str_replace(' bool ', ' bit ', $sql); $sql = str_replace('auto_increment', 'IDENTITY(1,1)', $sql); #$sql = preg_replace('/NOT NULL(?! IDENTITY)/', 'NULL', $sql); # Allow NULL's for non IDENTITY columns # Tidy up and write file $sql = preg_replace('/,\s*\)/s', "\n)", $sql); # Remove spurious commas left after INDEX removals $sql = preg_replace('/^\s*^/m', '', $sql); # Remove empty lines $sql = preg_replace('/;$/m', ";\n", $sql); # Separate each statement with an empty line file_put_contents($mssql_tmpl, $sql); } # Parse the MSSQL template replacing inline variables such as /*$wgDBprefix*/ $err = $this->sourceFile($mssql_tmpl); if ($err !== true) $this->reportQueryError($err,0,$sql,__FUNCTION__); # Use DatabasePostgres's code to populate interwiki from MySQL template $f = fopen($mysql_iw,'r'); if ($f == false) dieout("
  • Could not find the interwiki.sql file"); $sql = "INSERT INTO {$this->mTablePrefix}interwiki(iw_prefix,iw_url,iw_local) VALUES "; while (!feof($f)) { $line = fgets($f,1024); $matches = array(); if (!preg_match('/^\s*(\(.+?),(\d)\)/', $line, $matches)) continue; $this->query("$sql $matches[1],$matches[2])"); } } /** * No-op lock functions */ public function lock( $lockName, $method ) { return true; } public function unlock( $lockName, $method ) { return true; } } /** * @ingroup Database */ class MSSQLField extends MySQLField { function __construct() { } static function fromText($db, $table, $field) { $n = new MSSQLField; $n->name = $field; $n->tablename = $table; return $n; } } // end DatabaseMssql class