* @author Joel Penner <a-joelpe at microsoft dot com>
* @author Chris Pucci <a-cpucci at microsoft dot com>
* @author Ryan Biesemeyer <v-ryanbi at microsoft dot com>
+ * @author Ryan Schmidt <skizzerz at gmail dot com>
*/
/**
* @ingroup Database
*/
class DatabaseMssql extends DatabaseBase {
- /** @var resource */
+ protected $mInsertId = null;
protected $mLastResult = null;
-
- /** @var int The number of rows affected as an integer */
protected $mAffectedRows = null;
+ protected $mSubqueryId = 0;
+ protected $mScrollableCursor = true;
+ protected $mPrepareStatements = true;
+ protected $mBinaryColumnCache = null;
+ protected $mBitColumnCache = null;
+ protected $mIgnoreDupKeyErrors = false;
- /**
- * @var int Post number for database
- * @todo Unused and can be removed?
- */
protected $mPort;
- /** @var int */
- private $mInsertId = null;
-
- function cascadingDeletes() {
+ public function cascadingDeletes() {
return true;
}
- function cleanupTriggers() {
- return true;
+ public function cleanupTriggers() {
+ return false;
}
- function strictIPs() {
- return true;
+ public function strictIPs() {
+ return false;
}
- function realTimestamps() {
- return true;
+ public function realTimestamps() {
+ return false;
}
- function implicitGroupby() {
+ public function implicitGroupby() {
return false;
}
- function implicitOrderby() {
+ public function implicitOrderby() {
return false;
}
- function functionalIndexes() {
+ public function functionalIndexes() {
return true;
}
- function unionSupportsOrderAndLimit() {
+ public function unionSupportsOrderAndLimit() {
return false;
}
* @throws DBConnectionError
* @return bool|DatabaseBase|null
*/
- function open( $server, $user, $password, $dbName ) {
+ public function open( $server, $user, $password, $dbName ) {
# Test for driver support, to avoid suppressed fatal error
if ( !function_exists( 'sqlsrv_connect' ) ) {
throw new DBConnectionError(
$this,
- "MS Sql Server Native (sqlsrv) functions missing. You can download " .
- "the driver from: http://go.microsoft.com/fwlink/?LinkId=123470\n" );
+ "Microsoft SQL Server Native (sqlsrv) functions missing.
+ You can download the driver from: http://go.microsoft.com/fwlink/?LinkId=123470\n"
+ );
}
- global $wgDBport;
+ global $wgDBport, $wgDBWindowsAuthentication;
# e.g. the class is being loaded
if ( !strlen( $user ) ) {
$connectionInfo['Database'] = $dbName;
}
- // Start NT Auth Hack
- // Quick and dirty work around to provide NT Auth designation support.
- // Current solution requires installer to know to input 'ntauth' for
- // both username and password to trigger connection via NT Auth. Ugly,
- // ugly, ugly!
- // @todo Make this better and add NT Auth choice to MW installer when
- // SQL Server option is chosen.
- $ntAuthUserTest = strtolower( $user );
- $ntAuthPassTest = strtolower( $password );
-
// Decide which auth scenerio to use
- if ( $ntAuthPassTest == 'ntauth' && $ntAuthUserTest == 'ntauth' ) {
- // Don't add credentials to $connectionInfo
- } else {
+ // if we are using Windows auth, don't add credentials to $connectionInfo
+ if ( !$wgDBWindowsAuthentication ) {
$connectionInfo['UID'] = $user;
$connectionInfo['PWD'] = $password;
}
- // End NT Auth Hack
wfSuppressWarnings();
$this->mConn = sqlsrv_connect( $server, $connectionInfo );
wfRestoreWarnings();
if ( $this->mConn === false ) {
- wfDebug( "DB connection error\n" );
- wfDebug( "Server: $server, Database: $dbName, User: $user, Password: " .
- substr( $password, 0, 3 ) . "...\n" );
- wfDebug( $this->lastError() . "\n" );
-
- return false;
+ throw new DBConnectionError( $this, $this->lastError() );
}
$this->mOpened = true;
return sqlsrv_close( $this->mConn );
}
+ /**
+ * @param bool|MssqlResultWrapper|resource $result
+ * @return bool|MssqlResultWrapper
+ */
+ public function resultObject( $result ) {
+ if ( empty( $result ) ) {
+ return false;
+ } elseif ( $result instanceof MssqlResultWrapper ) {
+ return $result;
+ } elseif ( $result === true ) {
+ // Successful write query
+ return $result;
+ } else {
+ return new MssqlResultWrapper( $this, $result );
+ }
+ }
+
/**
* @param string $sql
* @return bool|MssqlResult
* @throws DBUnexpectedError
*/
protected function doQuery( $sql ) {
- wfDebug( "SQL: [$sql]\n" );
+ global $wgDebugDumpSql;
+ if ( $wgDebugDumpSql ) {
+ wfDebug( "SQL: [$sql]\n" );
+ }
+ $this->offset = 0;
// several extensions seem to think that all databases support limits
// via LIMIT N after the WHERE clause well, MSSQL uses SELECT TOP N,
}
// perform query
- $stmt = sqlsrv_query( $this->mConn, $sql );
- if ( $stmt == false ) {
- $message = "A database error has occurred. Did you forget " .
- "to run maintenance/update.php after upgrading? See: " .
- "http://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script\n" .
- "Query: " . htmlentities( $sql ) . "\n" .
- "Function: " . __METHOD__ . "\n";
- // process each error (our driver will give us an array of errors unlike other providers)
- foreach ( sqlsrv_errors() as $error ) {
- $message .= $message . "ERROR[" . $error['code'] . "] " . $error['message'] . "\n";
- }
- throw new DBUnexpectedError( $this, $message );
+ // SQLSRV_CURSOR_STATIC is slower than SQLSRV_CURSOR_CLIENT_BUFFERED (one of the two is
+ // needed if we want to be able to seek around the result set), however CLIENT_BUFFERED
+ // has a bug in the sqlsrv driver where wchar_t types (such as nvarchar) that are empty
+ // strings make php throw a fatal error "Severe error translating Unicode"
+ if ( $this->mScrollableCursor ) {
+ $scrollArr = array( 'Scrollable' => SQLSRV_CURSOR_STATIC );
+ } else {
+ $scrollArr = array();
}
- // remember number of rows affected
- $this->mAffectedRows = sqlsrv_rows_affected( $stmt );
- // if it is a SELECT statement, or an insert with a request to output
- // something we want to return a row.
- if ( ( preg_match( '#\bSELECT\s#i', $sql ) ) ||
- ( preg_match( '#\bINSERT\s#i', $sql ) && preg_match( '#\bOUTPUT\s+INSERTED\b#i', $sql ) )
- ) {
- // this is essentially a rowset, but Mediawiki calls these 'result'
- // the rowset owns freeing the statement
- $res = new MssqlResult( $stmt );
+ if ( $this->mPrepareStatements ) {
+ // we do prepare + execute so we can get its field metadata for later usage if desired
+ $stmt = sqlsrv_prepare( $this->mConn, $sql, array(), $scrollArr );
+ $success = sqlsrv_execute( $stmt );
} else {
- // otherwise we simply return it was successful, failure throws an exception
- $res = true;
+ $stmt = sqlsrv_query( $this->mConn, $sql, array(), $scrollArr );
+ $success = (bool)$stmt;
}
- return $res;
- }
+ if ( $this->mIgnoreDupKeyErrors ) {
+ // ignore duplicate key errors, but nothing else
+ // this emulates INSERT IGNORE in MySQL
+ if ( $success === false ) {
+ $errors = sqlsrv_errors( SQLSRV_ERR_ERRORS );
+ $success = true;
+
+ foreach ( $errors as $err ) {
+ if ( $err['SQLSTATE'] == '23000' && $err['code'] == '2601' ) {
+ continue; // duplicate key error
+ } elseif ( $err['SQLSTATE'] == '01000' && $err['code'] == '3621' ) {
+ continue; // generic "the statement has been terminated" error
+ }
- /**
- * @param mixed|ResultWrapper $res
- */
- function freeResult( $res ) {
- if ( $res instanceof ResultWrapper ) {
- $res = $res->result;
+ $success = false; // getting here means we got an error we weren't expecting
+ break;
+ }
+
+ if ( $success ) {
+ $this->mAffectedRows = 0;
+ return true;
+ }
+ }
+ }
+
+ if ( $success === false ) {
+ return false;
}
- $res->free();
+ // remember number of rows affected
+ $this->mAffectedRows = sqlsrv_rows_affected( $stmt );
+
+ return $stmt;
}
- /**
- * @param ResultWrapper|stdClass $res
- * @return stdClass
- */
- function fetchObject( $res ) {
+ public function freeResult( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
- $row = $res->fetch( 'OBJECT' );
- return $row;
+ sqlsrv_free_stmt( $res );
}
/**
- * @return string
+ * @param MssqlResultWrapper $res
+ * @return stdClass
*/
- function getErrors() {
- $strRet = '';
- $retErrors = sqlsrv_errors( SQLSRV_ERR_ALL );
- if ( $retErrors != null ) {
- foreach ( $retErrors as $arrError ) {
- $strRet .= "SQLState: " . $arrError['SQLSTATE'] . "\n";
- $strRet .= "Error Code: " . $arrError['code'] . "\n";
- $strRet .= "Message: " . $arrError['message'] . "\n";
- }
- } else {
- $strRet = "No errors found";
- }
-
- return $strRet;
+ public function fetchObject( $res ) {
+ // $res is expected to be an instance of MssqlResultWrapper here
+ return $res->fetchObject();
}
/**
- * @param resource $res
- * @return Blob
+ * @param MssqlResultWrapper $res
+ * @return array
*/
- function fetchRow( $res ) {
- if ( $res instanceof ResultWrapper ) {
- $res = $res->result;
- }
- $row = $res->fetch( SQLSRV_FETCH_BOTH );
-
- return $row;
+ public function fetchRow( $res ) {
+ return $res->fetchRow();
}
/**
* @param mixed $res
* @return int
*/
- function numRows( $res ) {
+ public function numRows( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
- return ( $res ) ? $res->numrows() : 0;
+ return sqlsrv_num_rows( $res );
}
- function numFields( $res ) {
+ /**
+ * @param mixed $res
+ * @return int
+ */
+ public function numFields( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
- return ( $res ) ? $res->numfields() : 0;
+ return sqlsrv_num_fields( $res );
}
- function fieldName( $res, $n ) {
+ /**
+ * @param mixed $res
+ * @param int $n
+ * @return int
+ */
+ public function fieldName( $res, $n ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
- return ( $res ) ? $res->fieldname( $n ) : 0;
+ $metadata = sqlsrv_field_metadata( $res );
+ return $metadata[$n]['Name'];
}
/**
* This must be called after nextSequenceVal
* @return int|null
*/
- function insertId() {
+ public function insertId() {
return $this->mInsertId;
}
/**
- * @param mixed $res
+ * @param MssqlResultWrapper $res
* @param int $row
* @return bool
*/
- function dataSeek( $res, $row ) {
- if ( $res instanceof ResultWrapper ) {
- $res = $res->result;
- }
-
- return ( $res ) ? $res->seek( $row ) : false;
+ public function dataSeek( $res, $row ) {
+ return $res->seek( $row );
}
- function lastError() {
- if ( $this->mConn ) {
- return $this->getErrors();
+ /**
+ * @return string
+ */
+ public function lastError() {
+ $strRet = '';
+ $retErrors = sqlsrv_errors( SQLSRV_ERR_ALL );
+ if ( $retErrors != null ) {
+ foreach ( $retErrors as $arrError ) {
+ $strRet .= $this->formatError( $arrError ) . "\n";
+ }
} else {
- return "No database connection";
+ $strRet = "No errors found";
}
+
+ return $strRet;
+ }
+
+ /**
+ * @return string
+ */
+ private function formatError( $err ) {
+ return '[SQLSTATE ' . $err['SQLSTATE'] . '][Error Code ' . $err['code'] . ']' . $err['message'];
}
- function lastErrno() {
+ /**
+ * @return string
+ */
+ public function lastErrno() {
$err = sqlsrv_errors( SQLSRV_ERR_ALL );
- if ( $err[0] ) {
+ if ( $err !== null && isset( $err[0] ) ) {
return $err[0]['code'];
} else {
return 0;
}
}
- function affectedRows() {
+ /**
+ * @return int
+ */
+ public function affectedRows() {
return $this->mAffectedRows;
}
* @return mixed Database result resource (feed to Database::fetchObject
* or whatever), or false on failure
*/
- function select( $table, $vars, $conds = '', $fname = __METHOD__,
+ public function select( $table, $vars, $conds = '', $fname = __METHOD__,
$options = array(), $join_conds = array()
) {
$sql = $this->selectSQLText( $table, $vars, $conds, $fname, $options, $join_conds );
if ( isset( $options['EXPLAIN'] ) ) {
- sqlsrv_query( $this->mConn, "SET SHOWPLAN_ALL ON;" );
- $ret = $this->query( $sql, $fname );
- sqlsrv_query( $this->mConn, "SET SHOWPLAN_ALL OFF;" );
+ try {
+ $this->mScrollableCursor = false;
+ $this->mPrepareStatements = false;
+ $this->query( "SET SHOWPLAN_ALL ON" );
+ $ret = $this->query( $sql, $fname );
+ $this->query( "SET SHOWPLAN_ALL OFF" );
+ } catch ( DBQueryError $dqe ) {
+ if ( isset( $options['FOR COUNT'] ) ) {
+ // likely don't have privs for SHOWPLAN, so run a select count instead
+ $this->query( "SET SHOWPLAN_ALL OFF" );
+ unset( $options['EXPLAIN'] );
+ $ret = $this->select(
+ $table,
+ 'COUNT(*) AS EstimateRows',
+ $conds,
+ $fname,
+ $options,
+ $join_conds
+ );
+ } else {
+ // someone actually wanted the query plan instead of an est row count
+ // let them know of the error
+ $this->mScrollableCursor = true;
+ $this->mPrepareStatements = true;
+ throw $dqe;
+ }
+ }
+ $this->mScrollableCursor = true;
+ $this->mPrepareStatements = true;
return $ret;
}
* (e.g. array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
* @return string The SQL text
*/
- function selectSQLText( $table, $vars, $conds = '', $fname = __METHOD__,
+ public function selectSQLText( $table, $vars, $conds = '', $fname = __METHOD__,
$options = array(), $join_conds = array()
) {
if ( isset( $options['EXPLAIN'] ) ) {
unset( $options['EXPLAIN'] );
}
- return parent::selectSQLText( $table, $vars, $conds, $fname, $options, $join_conds );
+ $sql = parent::selectSQLText( $table, $vars, $conds, $fname, $options, $join_conds );
+
+ // try to rewrite aggregations of bit columns (currently MAX and MIN)
+ if ( strpos( $sql, 'MAX(' ) !== false || strpos( $sql, 'MIN(' ) !== false ) {
+ $bitColumns = array();
+ if ( is_array( $table ) ) {
+ foreach ( $table as $t ) {
+ $bitColumns += $this->getBitColumns( $this->tableName( $t ) );
+ }
+ } else {
+ $bitColumns = $this->getBitColumns( $this->tableName( $table ) );
+ }
+
+ foreach ( $bitColumns as $col => $info ) {
+ $replace = array(
+ "MAX({$col})" => "MAX(CAST({$col} AS tinyint))",
+ "MIN({$col})" => "MIN(CAST({$col} AS tinyint))",
+ );
+ $sql = str_replace( array_keys( $replace ), array_values( $replace ), $sql );
+ }
+ }
+
+ return $sql;
+ }
+
+ public function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds,
+ $fname = __METHOD__
+ ) {
+ $this->mScrollableCursor = false;
+ try {
+ parent::deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname );
+ } catch ( Exception $e ) {
+ $this->mScrollableCursor = true;
+ throw $e;
+ }
+ $this->mScrollableCursor = true;
+ }
+
+ public function delete( $table, $conds, $fname = __METHOD__ ) {
+ $this->mScrollableCursor = false;
+ try {
+ parent::delete( $table, $conds, $fname );
+ } catch ( Exception $e ) {
+ $this->mScrollableCursor = true;
+ throw $e;
+ }
+ $this->mScrollableCursor = true;
}
/**
* @param array $options
* @return int
*/
- function estimateRowCount( $table, $vars = '*', $conds = '',
+ public function estimateRowCount( $table, $vars = '*', $conds = '',
$fname = __METHOD__, $options = array()
) {
// http://msdn2.microsoft.com/en-us/library/aa259203.aspx
$options['EXPLAIN'] = true;
+ $options['FOR COUNT'] = true;
$res = $this->select( $table, $vars, $conds, $fname, $options );
$rows = -1;
if ( $res ) {
$row = $this->fetchRow( $res );
+
if ( isset( $row['EstimateRows'] ) ) {
$rows = $row['EstimateRows'];
}
* @param string $fname
* @return array|bool|null
*/
- function indexInfo( $table, $index, $fname = __METHOD__ ) {
+ public function indexInfo( $table, $index, $fname = __METHOD__ ) {
# This does not return the same info as MYSQL would, but that's OK
# because MediaWiki never uses the returned value except to check for
# the existance of indexes.
* @throws DBQueryError
* @return bool
*/
- function insert( $table, $arrToInsert, $fname = __METHOD__, $options = array() ) {
+ public function insert( $table, $arrToInsert, $fname = __METHOD__, $options = array() ) {
# No rows to insert, easy just return now
if ( !count( $arrToInsert ) ) {
return true;
$arrToInsert = array( 0 => $arrToInsert ); // make everything multi row compatible
}
- $allOk = true;
-
// We know the table we're inserting into, get its identity column
$identity = null;
- // strip matching square brackets from table name
- $tableRaw = preg_replace( '#\[([^\]]*)\]#', '$1', $table );
+ // strip matching square brackets and the db/schema from table name
+ $tableRawArr = explode( '.', preg_replace( '#\[([^\]]*)\]#', '$1', $table ) );
+ $tableRaw = array_pop( $tableRawArr );
$res = $this->doQuery(
"SELECT NAME AS idColumn FROM SYS.IDENTITY_COLUMNS " .
"WHERE OBJECT_NAME(OBJECT_ID)='{$tableRaw}'"
);
- if ( $res && $res->numrows() ) {
+ if ( $res && sqlsrv_has_rows( $res ) ) {
// There is an identity for this table.
- $identity = array_pop( $res->fetch( SQLSRV_FETCH_ASSOC ) );
+ $identityArr = sqlsrv_fetch_array( $res, SQLSRV_FETCH_ASSOC );
+ $identity = array_pop( $identityArr );
}
- unset( $res );
+ sqlsrv_free_stmt( $res );
+
+ // Determine binary/varbinary fields so we can encode data as a hex string like 0xABCDEF
+ $binaryColumns = $this->getBinaryColumns( $table );
foreach ( $arrToInsert as $a ) {
// start out with empty identity column, this is so we can return
foreach ( $a as $k => $v ) {
if ( $k == $identity ) {
if ( !is_null( $v ) ) {
- // there is a value being passed to us, we need to turn on and off inserted identity
+ // there is a value being passed to us,
+ // we need to turn on and off inserted identity
$sqlPre = "SET IDENTITY_INSERT $table ON;";
$sqlPost = ";SET IDENTITY_INSERT $table OFF;";
} else {
- // we can't insert NULL into an identity column, so remove the column from the insert.
+ // we can't insert NULL into an identity column,
+ // so remove the column from the insert.
unset( $a[$k] );
}
}
// INSERT IGNORE is not supported by SQL Server
// remove IGNORE from options list and set ignore flag to true
$ignoreClause = false;
- foreach ( $options as $k => $v ) {
- if ( strtoupper( $v ) == "IGNORE" ) {
- unset( $options[$k] );
- $ignoreClause = true;
- }
- }
-
- // translate MySQL INSERT IGNORE to something SQL Server can use
- // 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')
- if ( $ignoreClause ) {
- $prival = $a[$keys[0]];
- $sqlPre .= "IF NOT EXISTS (SELECT * FROM $table WHERE $keys[0] = '$prival')";
+ if ( in_array( 'IGNORE', $options ) ) {
+ $options = array_diff( $options, array( 'IGNORE' ) );
+ $this->mIgnoreDupKeyErrors = true;
}
// Build the actual query
" INTO $table (" . implode( ',', $keys ) . ") $identityClause VALUES (";
$first = true;
- foreach ( $a as $value ) {
+ foreach ( $a as $key => $value ) {
+ if ( isset( $binaryColumns[$key] ) ) {
+ $value = new MssqlBlob( $value );
+ }
if ( $first ) {
$first = false;
} else {
$sql .= ',';
}
- if ( is_string( $value ) ) {
- $sql .= $this->addQuotes( $value );
- } elseif ( is_null( $value ) ) {
+ if ( is_null( $value ) ) {
$sql .= 'null';
} elseif ( is_array( $value ) || is_object( $value ) ) {
- if ( is_object( $value ) && strtolower( get_class( $value ) ) == 'blob' ) {
+ if ( is_object( $value ) && $value instanceof Blob ) {
$sql .= $this->addQuotes( $value );
} else {
$sql .= $this->addQuotes( serialize( $value ) );
}
} else {
- $sql .= $value;
+ $sql .= $this->addQuotes( $value );
}
}
$sql .= ')' . $sqlPost;
// Run the query
- $ret = sqlsrv_query( $this->mConn, $sql );
-
- if ( $ret === false ) {
- throw new DBQueryError( $this, $this->getErrors(), $this->lastErrno(), $sql, $fname );
- } elseif ( $ret != null ) {
- // remember number of rows affected
- $this->mAffectedRows = sqlsrv_rows_affected( $ret );
- if ( !is_null( $identity ) ) {
- // then we want to get the identity column value we were assigned and save it off
- $row = sqlsrv_fetch_object( $ret );
- $this->mInsertId = $row->$identity;
- }
- sqlsrv_free_stmt( $ret );
- continue;
+ $this->mScrollableCursor = false;
+ try {
+ $ret = $this->query( $sql );
+ } catch ( Exception $e ) {
+ $this->mScrollableCursor = true;
+ $this->mIgnoreDupKeyErrors = false;
+ throw $e;
+ }
+ $this->mScrollableCursor = true;
+ $this->mIgnoreDupKeyErrors = false;
+
+ if ( !is_null( $identity ) ) {
+ // then we want to get the identity column value we were assigned and save it off
+ $row = $ret->fetchObject();
+ $this->mInsertId = $row->$identity;
}
- $allOk = false;
}
- return $allOk;
+ return $ret;
}
/**
* @throws DBQueryError
* @return null|ResultWrapper
*/
- function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = __METHOD__,
- $insertOptions = array(), $selectOptions = array() ) {
- $ret = parent::insertSelect(
- $destTable,
- $srcTable,
- $varMap,
- $conds,
- $fname,
- $insertOptions,
- $selectOptions
- );
-
- if ( $ret === false ) {
- throw new DBQueryError( $this, $this->getErrors(), $this->lastErrno(), /*$sql*/ '', $fname );
- } elseif ( $ret != null ) {
- // remember number of rows affected
- // @todo FIXME: $ret type does not appear to be a resource
- $this->mAffectedRows = sqlsrv_rows_affected( $ret );
-
- return $ret;
+ public function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = __METHOD__,
+ $insertOptions = array(), $selectOptions = array()
+ ) {
+ $this->mScrollableCursor = false;
+ try {
+ $ret = parent::insertSelect(
+ $destTable,
+ $srcTable,
+ $varMap,
+ $conds,
+ $fname,
+ $insertOptions,
+ $selectOptions
+ );
+ } catch ( Exception $e ) {
+ $this->mScrollableCursor = true;
+ throw $e;
}
+ $this->mScrollableCursor = true;
- return null;
+ return $ret;
}
/**
- * Return the next in a sequence, save the value for retrieval via insertId()
- * @param string $seqName
- * @return int|null
+ * UPDATE wrapper. Takes a condition array and a SET array.
+ *
+ * @param string $table name of the table to UPDATE. This will be passed through
+ * DatabaseBase::tableName().
+ *
+ * @param array $values An array of values to SET. For each array element,
+ * the key gives the field name, and the value gives the data
+ * to set that field to. The data will be quoted by
+ * DatabaseBase::addQuotes().
+ *
+ * @param array $conds An array of conditions (WHERE). See
+ * DatabaseBase::select() for the details of the format of
+ * condition arrays. Use '*' to update all rows.
+ *
+ * @param string $fname The function name of the caller (from __METHOD__),
+ * for logging and profiling.
+ *
+ * @param array $options An array of UPDATE options, can be:
+ * - IGNORE: Ignore unique key conflicts
+ * - LOW_PRIORITY: MySQL-specific, see MySQL manual.
+ * @return bool
*/
- function nextSequenceValue( $seqName ) {
- if ( !$this->tableExists( 'sequence_' . $seqName ) ) {
- sqlsrv_query(
- $this->mConn,
- "CREATE TABLE [sequence_$seqName] (id INT NOT NULL IDENTITY PRIMARY KEY, junk varchar(10) NULL)"
- );
- }
- sqlsrv_query( $this->mConn, "INSERT INTO [sequence_$seqName] (junk) VALUES ('')" );
- $ret = sqlsrv_query( $this->mConn, "SELECT TOP 1 id FROM [sequence_$seqName] ORDER BY id DESC" );
- // KEEP ASSOC THERE, weird weird bug dealing with the return value if you don't
- $row = sqlsrv_fetch_array( $ret, SQLSRV_FETCH_ASSOC );
+ function update( $table, $values, $conds, $fname = __METHOD__, $options = array() ) {
+ $table = $this->tableName( $table );
+ $binaryColumns = $this->getBinaryColumns( $table );
- sqlsrv_free_stmt( $ret );
- $this->mInsertId = $row['id'];
+ $opts = $this->makeUpdateOptions( $options );
+ $sql = "UPDATE $opts $table SET " . $this->makeList( $values, LIST_SET, $binaryColumns );
- return $row['id'];
+ if ( $conds !== array() && $conds !== '*' ) {
+ $sql .= " WHERE " . $this->makeList( $conds, LIST_AND, $binaryColumns );
+ }
+
+ $this->mScrollableCursor = false;
+ try {
+ $ret = $this->query( $sql );
+ } catch ( Exception $e ) {
+ $this->mScrollableCursor = true;
+ throw $e;
+ }
+ $this->mScrollableCursor = true;
+ return true;
}
/**
- * Return the current value of a sequence. Assumes it has ben nextval'ed in this session.
- * @param string $seqName
- * @return int|null
+ * Makes an encoded list of strings from an array
+ * @param array $a containing the data
+ * @param int $mode Constant
+ * - LIST_COMMA: comma separated, no field names
+ * - LIST_AND: ANDed WHERE clause (without the WHERE). See
+ * the documentation for $conds in DatabaseBase::select().
+ * - LIST_OR: ORed WHERE clause (without the WHERE)
+ * - LIST_SET: comma separated with field names, like a SET clause
+ * - LIST_NAMES: comma separated field names
+ * @param array $binaryColumns Contains a list of column names that are binary types
+ * This is a custom parameter only present for MS SQL.
+ *
+ * @throws MWException|DBUnexpectedError
+ * @return string
*/
- function currentSequenceValue( $seqName ) {
- $ret = sqlsrv_query( $this->mConn, "SELECT TOP 1 id FROM [sequence_$seqName] ORDER BY id DESC" );
- if ( $ret !== false ) {
- $row = sqlsrv_fetch_array( $ret );
- sqlsrv_free_stmt( $ret );
+ public function makeList( $a, $mode = LIST_COMMA, $binaryColumns = array() ) {
+ if ( !is_array( $a ) ) {
+ throw new DBUnexpectedError( $this,
+ 'DatabaseBase::makeList called with incorrect parameters' );
+ }
- return $row['id'];
- } else {
- return $this->nextSequenceValue( $seqName );
+ $first = true;
+ $list = '';
+
+ foreach ( $a as $field => $value ) {
+ if ( $mode != LIST_NAMES && isset( $binaryColumns[$field] ) ) {
+ if ( is_array( $value ) ) {
+ foreach ( $value as &$v ) {
+ $v = new MssqlBlob( $v );
+ }
+ } else {
+ $value = new MssqlBlob( $value );
+ }
+ }
+
+ if ( !$first ) {
+ if ( $mode == LIST_AND ) {
+ $list .= ' AND ';
+ } elseif ( $mode == LIST_OR ) {
+ $list .= ' OR ';
+ } else {
+ $list .= ',';
+ }
+ } else {
+ $first = false;
+ }
+
+ if ( ( $mode == LIST_AND || $mode == LIST_OR ) && is_numeric( $field ) ) {
+ $list .= "($value)";
+ } elseif ( ( $mode == LIST_SET ) && is_numeric( $field ) ) {
+ $list .= "$value";
+ } elseif ( ( $mode == LIST_AND || $mode == LIST_OR ) && is_array( $value ) ) {
+ if ( count( $value ) == 0 ) {
+ throw new MWException( __METHOD__ . ": empty input for field $field" );
+ } elseif ( count( $value ) == 1 ) {
+ // Special-case single values, as IN isn't terribly efficient
+ // Don't necessarily assume the single key is 0; we don't
+ // enforce linear numeric ordering on other arrays here.
+ $value = array_values( $value );
+ $list .= $field . " = " . $this->addQuotes( $value[0] );
+ } else {
+ $list .= $field . " IN (" . $this->makeList( $value ) . ") ";
+ }
+ } elseif ( $value === null ) {
+ if ( $mode == LIST_AND || $mode == LIST_OR ) {
+ $list .= "$field IS ";
+ } elseif ( $mode == LIST_SET ) {
+ $list .= "$field = ";
+ }
+ $list .= 'NULL';
+ } else {
+ if ( $mode == LIST_AND || $mode == LIST_OR || $mode == LIST_SET ) {
+ $list .= "$field = ";
+ }
+ $list .= $mode == LIST_NAMES ? $value : $this->addQuotes( $value );
+ }
}
+
+ return $list;
}
/**
* @param string $field
* @return int Returns the size of a text field, or -1 for "unlimited"
*/
- function textFieldSize( $table, $field ) {
+ public function textFieldSize( $table, $field ) {
$table = $this->tableName( $table );
$sql = "SELECT CHARACTER_MAXIMUM_LENGTH,DATA_TYPE FROM INFORMATION_SCHEMA.Columns
WHERE TABLE_NAME = '$table' AND COLUMN_NAME = '$field'";
* @param bool|int $offset The SQL offset (default false)
* @return array|string
*/
- function limitResult( $sql, $limit, $offset = false ) {
+ public function limitResult( $sql, $limit, $offset = false ) {
if ( $offset === false || $offset == 0 ) {
if ( strpos( $sql, "SELECT" ) === false ) {
return "TOP {$limit} " . $sql;
} else {
- return preg_replace( '/\bSELECT(\s*DISTINCT)?\b/Dsi', 'SELECT$1 TOP ' . $limit, $sql, 1 );
+ return preg_replace( '/\bSELECT(\s+DISTINCT)?\b/Dsi',
+ 'SELECT$1 TOP ' . $limit, $sql, 1 );
}
} else {
- $sql = '
- SELECT * FROM (
- SELECT sub2.*, ROW_NUMBER() OVER(ORDER BY sub2.line2) AS line3 FROM (
- SELECT 1 AS line2, sub1.* FROM (' . $sql . ') AS sub1
- ) as sub2
- ) AS sub3
- WHERE line3 BETWEEN ' . ( $offset + 1 ) . ' AND ' . ( $offset + $limit );
+ // This one is fun, we need to pull out the select list as well as any ORDER BY clause
+ $select = $orderby = array();
+ $s1 = preg_match( '#SELECT\s+(.+?)\s+FROM#Dis', $sql, $select );
+ $s2 = preg_match( '#(ORDER BY\s+.+?)(\s*FOR XML .*)?$#Dis', $sql, $orderby );
+ $overOrder = $postOrder = '';
+ $first = $offset + 1;
+ $last = $offset + $limit;
+ $sub1 = 'sub_' . $this->mSubqueryId;
+ $sub2 = 'sub_' . ( $this->mSubqueryId + 1 );
+ $this->mSubqueryId += 2;
+ if ( !$s1 ) {
+ // wat
+ throw new DBUnexpectedError( $this, "Attempting to LIMIT a non-SELECT query\n" );
+ }
+ if ( !$s2 ) {
+ // no ORDER BY
+ $overOrder = 'ORDER BY 1';
+ } else {
+ if ( !isset( $orderby[2] ) || !$orderby[2] ) {
+ // don't need to strip it out if we're using a FOR XML clause
+ $sql = str_replace( $orderby[1], '', $sql );
+ }
+ $overOrder = $orderby[1];
+ $postOrder = ' ' . $overOrder;
+ }
+ $sql = "SELECT {$select[1]}
+ FROM (
+ SELECT ROW_NUMBER() OVER({$overOrder}) AS rowNumber, *
+ FROM ({$sql}) {$sub1}
+ ) {$sub2}
+ WHERE rowNumber BETWEEN {$first} AND {$last}{$postOrder}";
return $sql;
}
* @param string $sql
* @return array|mixed|string
*/
- function LimitToTopN( $sql ) {
+ public function LimitToTopN( $sql ) {
// Matches: LIMIT {[offset,] row_count | row_count OFFSET offset}
$pattern = '/\bLIMIT\s+((([0-9]+)\s*,\s*)?([0-9]+)(\s+OFFSET\s+([0-9]+))?)/i';
if ( preg_match( $pattern, $sql, $matches ) ) {
return $sql;
}
- /**
- * Timestamp in ISO 8601 format with no timezone: 1986-02-09T20:00:00Z
- *
- * @param int $ts Timestamp
- * @return bool|string The same date in ISO 8601 format with no timezone or false
- */
- function timestamp( $ts = 0 ) {
- return wfTimestamp( TS_ISO_8601, $ts );
- }
-
/**
* @return string Wikitext of a link to the server software's web site
*/
/**
* @return string Version information from the database
*/
- function getServerVersion() {
+ public function getServerVersion() {
$server_info = sqlsrv_server_info( $this->mConn );
$version = 'Error';
if ( isset( $server_info['SQLServerVersion'] ) ) {
* @param bool $schema
* @return bool
*/
- function tableExists( $table, $fname = __METHOD__, $schema = false ) {
+ public function tableExists( $table, $fname = __METHOD__, $schema = false ) {
$res = sqlsrv_query( $this->mConn, "SELECT * FROM information_schema.tables
WHERE table_type='BASE TABLE' AND table_name = '$table'" );
if ( $res === false ) {
- print "Error in tableExists query: " . $this->getErrors();
+ print "Error in tableExists query: " . $this->lastError();
return false;
}
* @param string $fname
* @return bool
*/
- function fieldExists( $table, $field, $fname = __METHOD__ ) {
+ public function fieldExists( $table, $field, $fname = __METHOD__ ) {
$table = $this->tableName( $table );
$res = sqlsrv_query( $this->mConn, "SELECT DATA_TYPE FROM INFORMATION_SCHEMA.Columns
WHERE TABLE_NAME = '$table' AND COLUMN_NAME = '$field'" );
if ( $res === false ) {
- print "Error in fieldExists query: " . $this->getErrors();
+ print "Error in fieldExists query: " . $this->lastError();
return false;
}
}
}
- function fieldInfo( $table, $field ) {
+ public function fieldInfo( $table, $field ) {
$table = $this->tableName( $table );
$res = sqlsrv_query( $this->mConn, "SELECT * FROM INFORMATION_SCHEMA.Columns
WHERE TABLE_NAME = '$table' AND COLUMN_NAME = '$field'" );
if ( $res === false ) {
- print "Error in fieldInfo query: " . $this->getErrors();
+ print "Error in fieldInfo query: " . $this->lastError();
return false;
}
if ( strlen( $identifier ) > 128 ) {
throw new MWException( "The identifier '$identifier' is too long (max. 128)" );
}
- if ( ( strpos( $identifier, '[' ) !== false ) || ( strpos( $identifier, ']' ) !== false ) ) {
+ if ( ( strpos( $identifier, '[' ) !== false )
+ || ( strpos( $identifier, ']' ) !== false )
+ ) {
// It may be allowed if you quoted with double quotation marks, but
// that would break if QUOTED_IDENTIFIER is OFF
- throw new MWException( "You can't use square brackers in the identifier '$identifier'" );
+ throw new MWException( "Square brackets are not allowed in '$identifier'" );
}
return "[$identifier]";
}
/**
- * Initial setup.
- * Precondition: This object is connected as the superuser.
- * Creates the database, schema, user and login.
+ * @param string $s
+ * @return string
*/
- function initial_setup( $dbName, $newUser, $loginPassword ) {
- $dbName = $this->escapeIdentifier( $dbName );
-
- // It is not clear what can be used as a login,
- // From http://msdn.microsoft.com/en-us/library/ms173463.aspx
- // a sysname may be the same as an identifier.
- $newUser = $this->escapeIdentifier( $newUser );
- $loginPassword = $this->addQuotes( $loginPassword );
-
- $this->doQuery( "CREATE DATABASE $dbName;" );
- $this->doQuery( "USE $dbName;" );
- $this->doQuery( "CREATE SCHEMA $dbName;" );
- $this->doQuery( "
- CREATE
- LOGIN $newUser
- WITH
- PASSWORD=$loginPassword
- ;
- " );
- $this->doQuery( "
- CREATE
- USER $newUser
- FOR
- LOGIN $newUser
- WITH
- DEFAULT_SCHEMA=$dbName
- ;
- " );
- $this->doQuery( "
- GRANT
- BACKUP DATABASE,
- BACKUP LOG,
- CREATE DEFAULT,
- CREATE FUNCTION,
- CREATE PROCEDURE,
- CREATE RULE,
- CREATE TABLE,
- CREATE VIEW,
- CREATE FULLTEXT CATALOG
- ON
- DATABASE::$dbName
- TO $newUser
- ;
- " );
- $this->doQuery( "
- GRANT
- CONTROL
- ON
- SCHEMA::$dbName
- TO $newUser
- ;
- " );
- }
-
- function encodeBlob( $b ) {
- // we can't have zero's and such, this is a simple encoding to make sure we don't barf
- return base64_encode( $b );
- }
-
- function decodeBlob( $b ) {
- // we can't have zero's and such, this is a simple encoding to make sure we don't barf
- return base64_decode( $b );
+ public function strencode( $s ) { # Should not be called by us
+ return str_replace( "'", "''", $s );
}
/**
- * @param array $tables
- * @param array $use_index
- * @param array $join_conds
+ * @param string $s
* @return string
*/
- protected function tableNamesWithUseIndexOrJOIN( $tables, $use_index = array(),
- $join_conds = array()
- ) {
- $ret = array();
- $retJOIN = array();
- $use_index_safe = is_array( $use_index ) ? $use_index : array();
- $join_conds_safe = is_array( $join_conds ) ? $join_conds : array();
- foreach ( $tables as $table ) {
- // Is there a JOIN and INDEX clause for this table?
- if ( isset( $join_conds_safe[$table] ) && isset( $use_index_safe[$table] ) ) {
- $tableClause = $join_conds_safe[$table][0] . ' ' . $this->tableName( $table );
- $tableClause .= ' ' . $this->useIndexClause( implode( ',', (array)$use_index_safe[$table] ) );
- $tableClause .= ' ON (' . $this->makeList( (array)$join_conds_safe[$table][1], LIST_AND ) . ')';
- $retJOIN[] = $tableClause;
- // Is there an INDEX clause?
- } elseif ( isset( $use_index_safe[$table] ) ) {
- $tableClause = $this->tableName( $table );
- $tableClause .= ' ' . $this->useIndexClause( implode( ',', (array)$use_index_safe[$table] ) );
- $ret[] = $tableClause;
- // Is there a JOIN clause?
- } elseif ( isset( $join_conds_safe[$table] ) ) {
- $tableClause = $join_conds_safe[$table][0] . ' ' . $this->tableName( $table );
- $tableClause .= ' ON (' . $this->makeList( (array)$join_conds_safe[$table][1], LIST_AND ) . ')';
- $retJOIN[] = $tableClause;
- } else {
- $tableClause = $this->tableName( $table );
- $ret[] = $tableClause;
- }
- }
- // We can't separate explicit JOIN clauses with ',', use ' ' for those
- $straightJoins = !empty( $ret ) ? implode( ',', $ret ) : "";
- $otherJoins = !empty( $retJOIN ) ? implode( ' ', $retJOIN ) : "";
-
- // Compile our final table clause
- return implode( ' ', array( $straightJoins, $otherJoins ) );
- }
-
- function strencode( $s ) { # Should not be called by us
- return str_replace( "'", "''", $s );
- }
-
- function addQuotes( $s ) {
- if ( $s instanceof Blob ) {
- return "'" . $s->fetch( $s ) . "'";
+ public function addQuotes( $s ) {
+ if ( $s instanceof MssqlBlob ) {
+ return $s->fetch();
+ } elseif ( $s instanceof Blob ) {
+ // this shouldn't really ever be called, but it's here if needed
+ // (and will quite possibly make the SQL error out)
+ $blob = new MssqlBlob( $s->fetch() );
+ return $blob->fetch();
} else {
+ if ( is_bool( $s ) ) {
+ $s = $s ? 1 : 0;
+ }
return parent::addQuotes( $s );
}
}
+ /**
+ * @param string $s
+ * @return string
+ */
public function addIdentifierQuotes( $s ) {
// http://msdn.microsoft.com/en-us/library/aa223962.aspx
return '[' . $s . ']';
}
+ /**
+ * @param string $name
+ * @return bool
+ */
public function isQuotedIdentifier( $name ) {
- return $name[0] == '[' && substr( $name, -1, 1 ) == ']';
+ return strlen( $name ) && $name[0] == '[' && substr( $name, -1, 1 ) == ']';
}
- function selectDB( $db ) {
- return ( $this->query( "SET DATABASE $db" ) !== false );
+ /**
+ * @param string $db
+ * @return bool
+ */
+ public function selectDB( $db ) {
+ try {
+ $this->mDBname = $db;
+ $this->query( "USE $db" );
+ return true;
+ } catch ( Exception $e ) {
+ return false;
+ }
}
/**
* an SQL query, valid keys are listed in the function.
* @return array
*/
- function makeSelectOptions( $options ) {
+ public function makeSelectOptions( $options ) {
$tailOpts = '';
$startOpts = '';
$tailOpts .= $this->makeOrderBy( $options );
- if ( isset( $noKeyOptions['DISTINCT'] ) && isset( $noKeyOptions['DISTINCTROW'] ) ) {
+ if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) {
$startOpts .= 'DISTINCT';
}
+ if ( isset( $noKeyOptions['FOR XML'] ) ) {
+ // used in group concat field emulation
+ $tailOpts .= " FOR XML PATH('')";
+ }
+
// we want this to be compatible with the output of parent::makeSelectOptions()
return array( $startOpts, '', $tailOpts, '' );
}
* Get the type of the DBMS, as it appears in $wgDBtype.
* @return string
*/
- function getType() {
+ public function getType() {
return 'mssql';
}
- function buildConcat( $stringList ) {
+ /**
+ * @param array $stringList
+ * @return string
+ */
+ public function buildConcat( $stringList ) {
return implode( ' + ', $stringList );
}
+ /**
+ * Build a GROUP_CONCAT or equivalent statement for a query.
+ * MS SQL doesn't have GROUP_CONCAT so we emulate it with other stuff (and boy is it nasty)
+ *
+ * This is useful for combining a field for several rows into a single string.
+ * NULL values will not appear in the output, duplicated values will appear,
+ * and the resulting delimiter-separated values have no defined sort order.
+ * Code using the results may need to use the PHP unique() or sort() methods.
+ *
+ * @param string $delim Glue to bind the results together
+ * @param string|array $table Table name
+ * @param string $field Field name
+ * @param string|array $conds Conditions
+ * @param string|array $join_conds Join conditions
+ * @return String SQL text
+ * @since 1.23
+ */
+ public function buildGroupConcatField( $delim, $table, $field, $conds = '',
+ $join_conds = array()
+ ) {
+ $gcsq = 'gcsq_' . $this->mSubqueryId;
+ $this->mSubqueryId++;
+
+ $delimLen = strlen( $delim );
+ $fld = "{$field} + {$this->addQuotes( $delim )}";
+ $sql = "(SELECT LEFT({$field}, LEN({$field}) - {$delimLen}) FROM ("
+ . $this->selectSQLText( $table, $fld, $conds, null, array( 'FOR XML' ), $join_conds )
+ . ") {$gcsq} ({$field}))";
+
+ return $sql;
+ }
+
+ /**
+ * @return string
+ */
public function getSearchEngine() {
return "SearchMssql";
}
/**
- * Since MSSQL doesn't recognize the infinity keyword, set date manually.
- * @todo Remove magic date
+ * Returns an associative array for fields that are of type varbinary, binary, or image
+ * $table can be either a raw table name or passed through tableName() first
+ * @param string $table
+ * @return array
+ */
+ private function getBinaryColumns( $table ) {
+ $tableRawArr = explode( '.', preg_replace( '#\[([^\]]*)\]#', '$1', $table ) );
+ $tableRaw = array_pop( $tableRawArr );
+
+ if ( $this->mBinaryColumnCache === null ) {
+ $this->populateColumnCaches();
+ }
+
+ return isset( $this->mBinaryColumnCache[$tableRaw] )
+ ? $this->mBinaryColumnCache[$tableRaw]
+ : array();
+ }
+
+ /**
+ * @param string $table
+ * @return array
+ */
+ private function getBitColumns( $table ) {
+ $tableRawArr = explode( '.', preg_replace( '#\[([^\]]*)\]#', '$1', $table ) );
+ $tableRaw = array_pop( $tableRawArr );
+
+ if ( $this->mBitColumnCache === null ) {
+ $this->populateColumnCaches();
+ }
+
+ return isset( $this->mBitColumnCache[$tableRaw] )
+ ? $this->mBitColumnCache[$tableRaw]
+ : array();
+ }
+
+ /**
+ * @void
+ */
+ private function populateColumnCaches() {
+ $res = $this->select( 'INFORMATION_SCHEMA.COLUMNS', '*',
+ array(
+ 'TABLE_CATALOG' => $this->mDBname,
+ 'TABLE_SCHEMA' => $this->mSchema,
+ 'DATA_TYPE' => array( 'varbinary', 'binary', 'image', 'bit' )
+ ) );
+
+ $this->mBinaryColumnCache = array();
+ $this->mBitColumnCache = array();
+ foreach ( $res as $row ) {
+ if ( $row->DATA_TYPE == 'bit' ) {
+ $this->mBitColumnCache[$row->TABLE_NAME][$row->COLUMN_NAME] = $row;
+ } else {
+ $this->mBinaryColumnCache[$row->TABLE_NAME][$row->COLUMN_NAME] = $row;
+ }
+ }
+ }
+
+ /**
+ * @param string $name
+ * @param string $format
* @return string
*/
- public function getInfinity() {
- return '3000-01-31 00:00:00.000';
+ function tableName( $name, $format = 'quoted' ) {
+ # Replace reserved words with better ones
+ switch ( $name ) {
+ case 'user':
+ return $this->realTableName( 'mwuser', $format );
+ default:
+ return $this->realTableName( $name, $format );
+ }
+ }
+
+ /**
+ * call this instead of tableName() in the updater when renaming tables
+ * @param string $name
+ * @param string $format
+ * @return string
+ */
+ function realTableName( $name, $format = 'quoted' ) {
+ return parent::tableName( $name, $format );
+ }
+
+ /**
+ * Called in the installer and updater.
+ * Probably doesn't need to be called anywhere else in the codebase.
+ * @param bool|null $value
+ * @return bool|null
+ */
+ public function prepareStatements( $value = null ) {
+ return wfSetVar( $this->mPrepareStatements, $value );
+ }
+
+ /**
+ * Called in the installer and updater.
+ * Probably doesn't need to be called anywhere else in the codebase.
+ * @param bool|null $value
+ * @return bool|null
+ */
+ public function scrollableCursor( $value = null ) {
+ return wfSetVar( $this->mScrollableCursor, $value );
}
} // end DatabaseMssql class
}
}
-/**
- * The MSSQL PHP driver doesn't support sqlsrv_num_rows, so we recall all rows
- * into an array and maintain our own cursor index into that array... This is
- * similar to the way the Oracle driver handles this same issue
- *
- * @ingroup Database
- */
-class MssqlResult {
- /** @var int */
- private $mCursor;
-
- /** @var array */
- private $mRows;
-
- /** @var bool|int */
- private $mNumFields;
-
- /** @var array|bool */
- private $mFieldMeta;
+class MssqlBlob extends Blob {
+ public function __construct( $data ) {
+ if ( $data instanceof MssqlBlob ) {
+ return $data;
+ } elseif ( $data instanceof Blob ) {
+ $this->mData = $data->fetch();
+ } elseif ( is_array( $data ) && is_object( $data ) ) {
+ $this->mData = serialize( $data );
+ } else {
+ $this->mData = $data;
+ }
+ }
/**
- * @param bool|resource $queryresult
+ * Returns an unquoted hex representation of a binary string
+ * for insertion into varbinary-type fields
+ * @return string
*/
- public function __construct( $queryresult = false ) {
- $this->mCursor = 0;
- $this->mRows = array();
- $this->mNumFields = sqlsrv_num_fields( $queryresult );
- $this->mFieldMeta = sqlsrv_field_metadata( $queryresult );
-
- $rows = sqlsrv_fetch_array( $queryresult, SQLSRV_FETCH_ASSOC );
-
- foreach ( $rows as $row ) {
- if ( $row !== null ) {
- foreach ( $row as $k => $v ) {
- if ( is_object( $v ) && method_exists( $v, 'format' ) ) { // DateTime Object
- $row[$k] = $v->format( "Y-m-d\TH:i:s\Z" );
- }
- }
- $this->mRows[] = $row; // read results into memory, cursors are not supported
- }
+ public function fetch() {
+ if ( $this->mData === null ) {
+ return 'null';
}
- $this->mRowCount = count( $this->mRows );
- sqlsrv_free_stmt( $queryresult );
+
+ $ret = '0x';
+ $dataLength = strlen( $this->mData );
+ for ( $i = 0; $i < $dataLength; $i++ ) {
+ $ret .= bin2hex( pack( 'C', ord( $this->mData[$i] ) ) );
+ }
+
+ return $ret;
}
+}
+
+class MssqlResultWrapper extends ResultWrapper {
+ private $mSeekTo = null;
/**
- * @param array $array
- * @param stdClass $obj
- * @return stdClass
+ * @return stdClass|bool
*/
- private function array_to_obj( $array, &$obj ) {
- foreach ( $array as $key => $value ) {
- if ( is_array( $value ) ) {
- $obj->$key = new stdClass();
- $this->array_to_obj( $value, $obj->$key );
- } else {
- if ( !empty( $key ) ) {
- $obj->$key = $value;
- }
- }
- }
+ public function fetchObject() {
+ $res = $this->result;
- return $obj;
- }
+ if ( $this->mSeekTo !== null ) {
+ $result = sqlsrv_fetch_object( $res, 'stdClass', array(),
+ SQLSRV_SCROLL_ABSOLUTE, $this->mSeekTo );
+ $this->mSeekTo = null;
+ } else {
+ $result = sqlsrv_fetch_object( $res );
+ }
- public function fetch( $mode = SQLSRV_FETCH_BOTH, $object_class = 'stdClass' ) {
- if ( $this->mCursor >= $this->mRowCount || $this->mRowCount == 0 ) {
+ // MediaWiki expects us to return boolean false when there are no more rows instead of null
+ if ( $result === null ) {
return false;
}
- $arrNum = array();
- if ( $mode == SQLSRV_FETCH_NUMERIC || $mode == SQLSRV_FETCH_BOTH ) {
- foreach ( $this->mRows[$this->mCursor] as $value ) {
- $arrNum[] = $value;
- }
- }
- switch ( $mode ) {
- case SQLSRV_FETCH_ASSOC:
- $ret = $this->mRows[$this->mCursor];
- break;
- case SQLSRV_FETCH_NUMERIC:
- $ret = $arrNum;
- break;
- case 'OBJECT':
- $o = new $object_class;
- $ret = $this->array_to_obj( $this->mRows[$this->mCursor], $o );
- break;
- case SQLSRV_FETCH_BOTH:
- default:
- $ret = $this->mRows[$this->mCursor] + $arrNum;
- break;
- }
-
- $this->mCursor++;
- return $ret;
+ return $result;
}
- public function get( $pos, $fld ) {
- return $this->mRows[$pos][$fld];
- }
+ /**
+ * @return array|bool
+ */
+ public function fetchRow() {
+ $res = $this->result;
- public function numrows() {
- return $this->mRowCount;
- }
+ if ( $this->mSeekTo !== null ) {
+ $result = sqlsrv_fetch_array( $res, SQLSRV_FETCH_BOTH,
+ SQLSRV_SCROLL_ABSOLUTE, $this->mSeekTo );
+ $this->mSeekTo = null;
+ } else {
+ $result = sqlsrv_fetch_array( $res );
+ }
- public function seek( $iRow ) {
- $this->mCursor = min( $iRow, $this->mRowCount );
- }
+ // MediaWiki expects us to return boolean false when there are no more rows instead of null
+ if ( $result === null ) {
+ return false;
+ }
- public function numfields() {
- return $this->mNumFields;
+ return $result;
}
- public function fieldname( $nr ) {
- $arrKeys = array_keys( $this->mRows[0] );
+ /**
+ * @param int $row
+ * @return bool
+ */
+ public function seek( $row ) {
+ $res = $this->result;
- return $arrKeys[$nr];
- }
+ // check bounds
+ $numRows = $this->db->numRows( $res );
+ $row = intval( $row );
- public function fieldtype( $nr ) {
- $i = 0;
- $intType = -1;
- foreach ( $this->mFieldMeta as $meta ) {
- if ( $nr == $i ) {
- $intType = $meta['Type'];
- break;
- }
- $i++;
- }
- // http://msdn.microsoft.com/en-us/library/cc296183.aspx contains type table
- switch ( $intType ) {
- case SQLSRV_SQLTYPE_BIGINT:
- $strType = 'bigint';
- break;
- case SQLSRV_SQLTYPE_BINARY:
- $strType = 'binary';
- break;
- case SQLSRV_SQLTYPE_BIT:
- $strType = 'bit';
- break;
- case SQLSRV_SQLTYPE_CHAR:
- $strType = 'char';
- break;
- case SQLSRV_SQLTYPE_DATETIME:
- $strType = 'datetime';
- break;
- case SQLSRV_SQLTYPE_DECIMAL: // ($precision, $scale)
- $strType = 'decimal';
- break;
- case SQLSRV_SQLTYPE_FLOAT:
- $strType = 'float';
- break;
- case SQLSRV_SQLTYPE_IMAGE:
- $strType = 'image';
- break;
- case SQLSRV_SQLTYPE_INT:
- $strType = 'int';
- break;
- case SQLSRV_SQLTYPE_MONEY:
- $strType = 'money';
- break;
- case SQLSRV_SQLTYPE_NCHAR: // ($charCount):
- $strType = 'nchar';
- break;
- case SQLSRV_SQLTYPE_NUMERIC: // ($precision, $scale):
- $strType = 'numeric';
- break;
- case SQLSRV_SQLTYPE_NVARCHAR: // ($charCount)
- $strType = 'nvarchar';
- break;
- // case SQLSRV_SQLTYPE_NVARCHAR('max'):
- // $strType = 'nvarchar(MAX)';
- // break;
- case SQLSRV_SQLTYPE_NTEXT:
- $strType = 'ntext';
- break;
- case SQLSRV_SQLTYPE_REAL:
- $strType = 'real';
- break;
- case SQLSRV_SQLTYPE_SMALLDATETIME:
- $strType = 'smalldatetime';
- break;
- case SQLSRV_SQLTYPE_SMALLINT:
- $strType = 'smallint';
- break;
- case SQLSRV_SQLTYPE_SMALLMONEY:
- $strType = 'smallmoney';
- break;
- case SQLSRV_SQLTYPE_TEXT:
- $strType = 'text';
- break;
- case SQLSRV_SQLTYPE_TIMESTAMP:
- $strType = 'timestamp';
- break;
- case SQLSRV_SQLTYPE_TINYINT:
- $strType = 'tinyint';
- break;
- case SQLSRV_SQLTYPE_UNIQUEIDENTIFIER:
- $strType = 'uniqueidentifier';
- break;
- case SQLSRV_SQLTYPE_UDT:
- $strType = 'UDT';
- break;
- case SQLSRV_SQLTYPE_VARBINARY: // ($byteCount)
- $strType = 'varbinary';
- break;
- // case SQLSRV_SQLTYPE_VARBINARY('max'):
- // $strType = 'varbinary(MAX)';
- // break;
- case SQLSRV_SQLTYPE_VARCHAR: // ($charCount)
- $strType = 'varchar';
- break;
- // case SQLSRV_SQLTYPE_VARCHAR('max'):
- // $strType = 'varchar(MAX)';
- // break;
- case SQLSRV_SQLTYPE_XML:
- $strType = 'xml';
- break;
- default:
- $strType = $intType;
+ if ( $numRows === 0 ) {
+ return false;
+ } elseif ( $row < 0 || $row > $numRows - 1 ) {
+ return false;
}
- return $strType;
- }
-
- public function free() {
- unset( $this->mRows );
+ // Unlike MySQL, the seek actually happens on the next access
+ $this->mSeekTo = $row;
+ return true;
}
}
dépôts / lhc / web / wiklou.git / blobdiff