--- /dev/null
+<?php
+/**
+ * This script is the MSSQL Server database abstraction layer
+ * - Licenced under LGPL (http://www.gnu.org/copyleft/lesser.html)
+ * - Author: [http://www.organicdesign.co.nz/nad User:Nad]
+ *
+ * {{php}}{{category:Extensions|DatabaseMssql.php}}
+ */
+
+/**
+ * @addtogroup Database
+ */
+class DatabaseMssql extends Database {
+
+ var $mAffectedRows;
+ var $mLastResult;
+ var $mDatabaseFile;
+
+ /**
+ * Constructor
+ */
+ function __construct($server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global') {
+
+ global $wgOut, $wgDBprefix, $wgCommandLineMode;
+ if (!isset($wgOut)) $wgOut = NULL; # Can't get a reference if it hasn't been set yet
+ $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*/
+ $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
+ */
+ function doQuery($sql) {
+ print "<pre>\n$sql\n</pre>";
+ $ret = mssql_query($sql, $this->mConn);
+ 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() {
+ $row = mssql_fetch_row(mssql_query('select @@ERROR'));
+ return $row[0];
+ }
+
+ /**
+ * Get a description of the last error
+ */
+ function lastError() {
+ return mssql_get_last_message();
+ return $error;
+ }
+
+ /**
+ * 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, $this->mConn );
+ }
+
+ /**
+ * Use MySQL's naming (accounts for prefix etc) but remove surrounding backticks
+ */
+ function tableName($name) {
+ return str_replace('`','',parent::tableName($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
+ * - don't know how to do this in MSSQL
+ */
+ function wasDeadlock() {
+ return false;
+ }
+
+ /**
+ * Begin a transaction, committing any previously open transaction
+ */
+ function begin( $fname = 'Database::begin' ) {
+ $this->query( 'BEGIN TRANSACTION', $fname );
+ $this->mTrxLevel = 1;
+ }
+
+ /**
+ * End a transaction
+ */
+ function commit( $fname = 'Database::commit' ) {
+ $this->query( 'COMMIT TRANSACTION', $fname );
+ $this->mTrxLevel = 0;
+ }
+
+ /**
+ * Rollback a transaction.
+ * No-op on non-transactional databases.
+ */
+ function rollback( $fname = 'Database::rollback' ) {
+ $this->query( 'ROLLBACK TRANSACTION', $fname, true );
+ $this->mTrxLevel = 0;
+ }
+
+ /**
+ * 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 (when modified according to the MediaWikiLite installation instructions)
+ * - this is the same way PostgreSQL works, 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 (1 || !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("<li>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])");
+ }
+ }
+
+}
+
+/**
+ * @addtogroup 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
+
dépôts / lhc / web / wiklou.git / commitdiff