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mediawiki_ynh/sources/mediawiki/includes/db/DatabaseMssql.php

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<?php
/**
* This is the MS SQL Server Native database abstraction layer.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Database
* @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>
*/
/**
* @ingroup Database
*/
class DatabaseMssql extends DatabaseBase {
var $mInsertId = null;
var $mLastResult = null;
var $mAffectedRows = null;
var $mPort;
function cascadingDeletes() {
return true;
}
function cleanupTriggers() {
return true;
}
function strictIPs() {
return true;
}
function realTimestamps() {
return true;
}
function implicitGroupby() {
return false;
}
function implicitOrderby() {
return false;
}
function functionalIndexes() {
return true;
}
function unionSupportsOrderAndLimit() {
return false;
}
/**
* Usually aborts on failure
* @param string $server
* @param string $user
* @param string $password
* @param string $dbName
* @throws DBConnectionError
* @return bool|DatabaseBase|null
*/
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" );
}
global $wgDBport;
if ( !strlen( $user ) ) { # e.g. the class is being loaded
return;
}
$this->close();
$this->mServer = $server;
$this->mPort = $wgDBport;
$this->mUser = $user;
$this->mPassword = $password;
$this->mDBname = $dbName;
$connectionInfo = array();
if ( $dbName ) {
$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
// TO-DO: 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 {
$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;
}
$this->mOpened = true;
return $this->mConn;
}
/**
* Closes a database connection, if it is open
* Returns success, true if already closed
* @return bool
*/
protected function closeConnection() {
return sqlsrv_close( $this->mConn );
}
protected function doQuery( $sql ) {
wfDebug( "SQL: [$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, so to catch any of those extensions we'll do a quick check for a LIMIT
// clause and pass $sql through $this->LimitToTopN() which parses the limit clause and passes the result to
// $this->limitResult();
if ( preg_match( '/\bLIMIT\s*/i', $sql ) ) {
// massage LIMIT -> TopN
$sql = $this->LimitToTopN( $sql );
}
// MSSQL doesn't have EXTRACT(epoch FROM XXX)
if ( preg_match( '#\bEXTRACT\s*?\(\s*?EPOCH\s+FROM\b#i', $sql, $matches ) ) {
// This is same as UNIX_TIMESTAMP, we need to calc # of seconds from 1970
$sql = str_replace( $matches[0], "DATEDIFF(s,CONVERT(datetime,'1/1/1970'),", $sql );
}
// 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 );
}
// 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 );
} else {
// otherwise we simply return it was successful, failure throws an exception
$res = true;
}
return $res;
}
function freeResult( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
$res->free();
}
function fetchObject( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
$row = $res->fetch( 'OBJECT' );
return $row;
}
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;
}
function fetchRow( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
$row = $res->fetch( SQLSRV_FETCH_BOTH );
return $row;
}
function numRows( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
return ( $res ) ? $res->numrows() : 0;
}
function numFields( $res ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
return ( $res ) ? $res->numfields() : 0;
}
function fieldName( $res, $n ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
return ( $res ) ? $res->fieldname( $n ) : 0;
}
/**
* This must be called after nextSequenceVal
* @return null
*/
function insertId() {
return $this->mInsertId;
}
function dataSeek( $res, $row ) {
if ( $res instanceof ResultWrapper ) {
$res = $res->result;
}
return ( $res ) ? $res->seek( $row ) : false;
}
function lastError() {
if ( $this->mConn ) {
return $this->getErrors();
} else {
return "No database connection";
}
}
function lastErrno() {
$err = sqlsrv_errors( SQLSRV_ERR_ALL );
if ( $err[0] ) {
return $err[0]['code'];
} else {
return 0;
}
}
function affectedRows() {
return $this->mAffectedRows;
}
/**
* SELECT wrapper
*
* @param $table Mixed: array or string, table name(s) (prefix auto-added)
* @param $vars Mixed: array or string, field name(s) to be retrieved
* @param $conds Mixed: array or string, condition(s) for WHERE
* @param $fname String: 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
* @param $join_conds Array: Associative array of table join conditions (optional)
* (e.g. array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
* @return Mixed: database result resource (feed to Database::fetchObject or whatever), or false on failure
*/
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;" );
return $ret;
}
return $this->query( $sql, $fname );
}
/**
* SELECT wrapper
*
* @param $table Mixed: Array or string, table name(s) (prefix auto-added)
* @param $vars Mixed: Array or string, field name(s) to be retrieved
* @param $conds Mixed: Array or string, condition(s) for WHERE
* @param $fname String: 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
* @param $join_conds Array: Associative array of table join conditions (optional)
* (e.g. array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
* @return string, the SQL text
*/
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 );
}
/**
* Estimate rows in dataset
* Returns estimated count, based on SHOWPLAN_ALL output
* This is not necessarily an accurate estimate, so use sparingly
* Returns -1 if count cannot be found
* Takes same arguments as Database::select()
* @return int
*/
function estimateRowCount( $table, $vars = '*', $conds = '', $fname = __METHOD__, $options = array() ) {
$options['EXPLAIN'] = true;// http://msdn2.microsoft.com/en-us/library/aa259203.aspx
$res = $this->select( $table, $vars, $conds, $fname, $options );
$rows = -1;
if ( $res ) {
$row = $this->fetchRow( $res );
if ( isset( $row['EstimateRows'] ) ) {
$rows = $row['EstimateRows'];
}
}
return $rows;
}
/**
* Returns information about an index
* If errors are explicitly ignored, returns NULL on failure
* @return array|bool|null
*/
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.
$sql = "sp_helpindex '" . $table . "'";
$res = $this->query( $sql, $fname );
if ( !$res ) {
return null;
}
$result = array();
foreach ( $res as $row ) {
if ( $row->index_name == $index ) {
$row->Non_unique = !stristr( $row->index_description, "unique" );
$cols = explode( ", ", $row->index_keys );
foreach ( $cols as $col ) {
$row->Column_name = trim( $col );
$result[] = clone $row;
}
} elseif ( $index == 'PRIMARY' && stristr( $row->index_description, 'PRIMARY' ) ) {
$row->Non_unique = 0;
$cols = explode( ", ", $row->index_keys );
foreach ( $cols as $col ) {
$row->Column_name = trim( $col );
$result[] = clone $row;
}
}
}
return empty( $result ) ? false : $result;
}
/**
* INSERT wrapper, inserts an array into a table
*
* $arrToInsert 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
* @param string $table
* @param array $arrToInsert
* @param string $fname
* @param array $options
* @throws DBQueryError
* @return bool
*/
function insert( $table, $arrToInsert, $fname = __METHOD__, $options = array() ) {
# No rows to insert, easy just return now
if ( !count( $arrToInsert ) ) {
return true;
}
if ( !is_array( $options ) ) {
$options = array( $options );
}
$table = $this->tableName( $table );
if ( !( isset( $arrToInsert[0] ) && is_array( $arrToInsert[0] ) ) ) {// Not multi row
$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;
$tableRaw = preg_replace( '#\[([^\]]*)\]#', '$1', $table ); // strip matching square brackets from table name
$res = $this->doQuery( "SELECT NAME AS idColumn FROM SYS.IDENTITY_COLUMNS WHERE OBJECT_NAME(OBJECT_ID)='{$tableRaw}'" );
if ( $res && $res->numrows() ) {
// There is an identity for this table.
$identity = array_pop( $res->fetch( SQLSRV_FETCH_ASSOC ) );
}
unset( $res );
foreach ( $arrToInsert as $a ) {
// start out with empty identity column, this is so we can return it as a result of the insert logic
$sqlPre = '';
$sqlPost = '';
$identityClause = '';
// if we have an identity column
if ( $identity ) {
// iterate through
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
$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.
unset( $a[$k] );
}
}
}
$identityClause = "OUTPUT INSERTED.$identity "; // we want to output an identity column as result
}
$keys = array_keys( $a );
// 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')";
}
// Build the actual query
$sql = $sqlPre . 'INSERT ' . implode( ' ', $options ) .
" INTO $table (" . implode( ',', $keys ) . ") $identityClause VALUES (";
$first = true;
foreach ( $a as $value ) {
if ( $first ) {
$first = false;
} else {
$sql .= ',';
}
if ( is_string( $value ) ) {
$sql .= $this->addQuotes( $value );
} elseif ( is_null( $value ) ) {
$sql .= 'null';
} elseif ( is_array( $value ) || is_object( $value ) ) {
if ( is_object( $value ) && strtolower( get_class( $value ) ) == 'blob' ) {
$sql .= $this->addQuotes( $value );
} else {
$sql .= $this->addQuotes( serialize( $value ) );
}
} else {
$sql .= $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;
}
$allOk = false;
}
return $allOk;
}
/**
* 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.
* @param string $destTable
* @param array|string $srcTable
* @param array $varMap
* @param array $conds
* @param string $fname
* @param array $insertOptions
* @param array $selectOptions
* @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
$this->mAffectedRows = sqlsrv_rows_affected( $ret );
return $ret;
}
return null;
}
/**
* Return the next in a sequence, save the value for retrieval via insertId()
* @return
*/
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" );
$row = sqlsrv_fetch_array( $ret, SQLSRV_FETCH_ASSOC );// KEEP ASSOC THERE, weird weird bug dealing with the return value if you don't
sqlsrv_free_stmt( $ret );
$this->mInsertId = $row['id'];
return $row['id'];
}
/**
* Return the current value of a sequence. Assumes it has ben nextval'ed in this session.
* @return
*/
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 );
return $row['id'];
} else {
return $this->nextSequenceValue( $seqName );
}
}
# Returns the size of a text field, or -1 for "unlimited"
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'";
$res = $this->query( $sql );
$row = $this->fetchRow( $res );
$size = -1;
if ( strtolower( $row['DATA_TYPE'] ) != 'text' ) {
$size = $row['CHARACTER_MAXIMUM_LENGTH'];
}
return $size;
}
/**
* Construct a LIMIT query with optional offset
* This is used for query pages
* $sql string SQL query we will append the limit too
* $limit integer the SQL limit
* $offset integer the SQL offset (default false)
* @return mixed|string
*/
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 );
}
} 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 );
return $sql;
}
}
// If there is a limit clause, parse it, strip it, and pass the remaining sql through limitResult()
// with the appropriate parameters. Not the prettiest solution, but better than building a whole new parser.
// This exists becase there are still too many extensions that don't use dynamic sql generation.
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 ) ) {
// row_count = $matches[4]
$row_count = $matches[4];
// offset = $matches[3] OR $matches[6]
$offset = $matches[3] or
$offset = $matches[6] or
$offset = false;
// strip the matching LIMIT clause out
$sql = str_replace( $matches[0], '', $sql );
return $this->limitResult( $sql, $row_count, $offset );
}
return $sql;
}
function timestamp( $ts = 0 ) {
return wfTimestamp( TS_ISO_8601, $ts );
}
/**
* @return string wikitext of a link to the server software's web site
*/
public function getSoftwareLink() {
return "[{{int:version-db-mssql-url}} MS SQL Server]";
}
/**
* @return string Version information from the database
*/
function getServerVersion() {
$server_info = sqlsrv_server_info( $this->mConn );
$version = 'Error';
if ( isset( $server_info['SQLServerVersion'] ) ) {
$version = $server_info['SQLServerVersion'];
}
return $version;
}
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();
return false;
}
if ( sqlsrv_fetch( $res ) ) {
return true;
} else {
return false;
}
}
/**
* Query whether a given column exists in the mediawiki schema
* @return bool
*/
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();
return false;
}
if ( sqlsrv_fetch( $res ) ) {
return true;
} else {
return false;
}
}
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();
return false;
}
$meta = $this->fetchRow( $res );
if ( $meta ) {
return new MssqlField( $meta );
}
return false;
}
/**
* Begin a transaction, committing any previously open transaction
*/
protected function doBegin( $fname = __METHOD__ ) {
sqlsrv_begin_transaction( $this->mConn );
$this->mTrxLevel = 1;
}
/**
* End a transaction
*/
protected function doCommit( $fname = __METHOD__ ) {
sqlsrv_commit( $this->mConn );
$this->mTrxLevel = 0;
}
/**
* Rollback a transaction.
* No-op on non-transactional databases.
*/
protected function doRollback( $fname = __METHOD__ ) {
sqlsrv_rollback( $this->mConn );
$this->mTrxLevel = 0;
}
/**
* Escapes a identifier for use inm SQL.
* Throws an exception if it is invalid.
* Reference: http://msdn.microsoft.com/en-us/library/aa224033%28v=SQL.80%29.aspx
* @param $identifier
* @throws MWException
* @return string
*/
private function escapeIdentifier( $identifier ) {
if ( strlen( $identifier ) == 0 ) {
throw new MWException( "An identifier must not be empty" );
}
if ( strlen( $identifier ) > 128 ) {
throw new MWException( "The identifier '$identifier' is too long (max. 128)" );
}
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'" );
}
return "[$identifier]";
}
/**
* Initial setup.
* Precondition: This object is connected as the superuser.
* Creates the database, schema, user and login.
*/
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 );
}
/**
* @private
* @return string
*/
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 ) . "'";
} else {
return parent::addQuotes( $s );
}
}
public function addIdentifierQuotes( $s ) {
// http://msdn.microsoft.com/en-us/library/aa223962.aspx
return '[' . $s . ']';
}
public function isQuotedIdentifier( $name ) {
return $name[0] == '[' && substr( $name, -1, 1 ) == ']';
}
function selectDB( $db ) {
return ( $this->query( "SET DATABASE $db" ) !== false );
}
/**
* @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 ) {
$tailOpts = '';
$startOpts = '';
$noKeyOptions = array();
foreach ( $options as $key => $option ) {
if ( is_numeric( $key ) ) {
$noKeyOptions[$option] = true;
}
}
$tailOpts .= $this->makeGroupByWithHaving( $options );
$tailOpts .= $this->makeOrderBy( $options );
if ( isset( $noKeyOptions['DISTINCT'] ) && isset( $noKeyOptions['DISTINCTROW'] ) ) {
$startOpts .= 'DISTINCT';
}
// 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() {
return 'mssql';
}
function buildConcat( $stringList ) {
return implode( ' + ', $stringList );
}
public function getSearchEngine() {
return "SearchMssql";
}
/**
* Since MSSQL doesn't recognize the infinity keyword, set date manually.
* @todo Remove magic date
* @return string
*/
public function getInfinity() {
return '3000-01-31 00:00:00.000';
}
} // end DatabaseMssql class
/**
* Utility class.
*
* @ingroup Database
*/
class MssqlField implements Field {
private $name, $tablename, $default, $max_length, $nullable, $type;
function __construct( $info ) {
$this->name = $info['COLUMN_NAME'];
$this->tablename = $info['TABLE_NAME'];
$this->default = $info['COLUMN_DEFAULT'];
$this->max_length = $info['CHARACTER_MAXIMUM_LENGTH'];
$this->nullable = !( strtolower( $info['IS_NULLABLE'] ) == 'no' );
$this->type = $info['DATA_TYPE'];
}
function name() {
return $this->name;
}
function tableName() {
return $this->tableName;
}
function defaultValue() {
return $this->default;
}
function maxLength() {
return $this->max_length;
}
function isNullable() {
return $this->nullable;
}
function type() {
return $this->type;
}
}
/**
* 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 {
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
}
}
$this->mRowCount = count( $this->mRows );
sqlsrv_free_stmt( $queryresult );
}
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;
}
}
}
return $obj;
}
public function fetch( $mode = SQLSRV_FETCH_BOTH, $object_class = 'stdClass' ) {
if ( $this->mCursor >= $this->mRowCount || $this->mRowCount == 0 ) {
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;
}
public function get( $pos, $fld ) {
return $this->mRows[$pos][$fld];
}
public function numrows() {
return $this->mRowCount;
}
public function seek( $iRow ) {
$this->mCursor = min( $iRow, $this->mRowCount );
}
public function numfields() {
return $this->mNumFields;
}
public function fieldname( $nr ) {
$arrKeys = array_keys( $this->mRows[0] );
return $arrKeys[$nr];
}
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;
}
return $strType;
}
public function free() {
unset( $this->mRows );
}
}
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