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<?php

/**

 * Native MSSQL driver.

 *

 * Requires mssql client. Works on Windows.

 *

 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.

 *

 * @package ADOdb

 * @link https://adodb.org Project's web site and documentation

 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker

 *

 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause

 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,

 * any later version. This means you can use it in proprietary products.

 * See the LICENSE.md file distributed with this source code for details.

 * @license BSD-3-Clause

 * @license LGPL-2.1-or-later

 *

 * @copyright 2000-2013 John Lim

 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community

 */

// security - hide paths

if (!defined('ADODB_DIR')) die();

//----------------------------------------------------------------

// MSSQL returns dates with the format Oct 13 2002 or 13 Oct 2002

// and this causes tons of problems because localized versions of

// MSSQL will return the dates in dmy or  mdy order; and also the

// month strings depends on what language has been configured. The

// following two variables allow you to control the localization

// settings - Ugh.

//

// MORE LOCALIZATION INFO

// ----------------------

// To configure datetime, look for and modify sqlcommn.loc,

//  	typically found in c:\mssql\install

// Also read :

//	 http://support.microsoft.com/default.aspx?scid=kb;EN-US;q220918

// Alternatively use:

// 	   CONVERT(char(12),datecol,120)

//----------------------------------------------------------------

ini_set('mssql.datetimeconvert',0);

class ADODB_mssql extends ADOConnection {

	var $databaseType = "mssql";

	var $dataProvider = "mssql";

	var $replaceQuote = "''"; // string to use to replace quotes

	var $fmtDate = "'Y-m-d'";

	var $fmtTimeStamp = "'Y-m-d\TH:i:s'";

	var $hasInsertID = true;

	var $substr = "substring";

	var $length = 'len';

	var $hasAffectedRows = true;

	var $metaDatabasesSQL = "select name from sysdatabases where name <> 'master'";

	var $metaTablesSQL="select name,case when type='U' then 'T' else 'V' end from sysobjects where (type='U' or type='V') and (name not in ('sysallocations','syscolumns','syscomments','sysdepends','sysfilegroups','sysfiles','sysfiles1','sysforeignkeys','sysfulltextcatalogs','sysindexes','sysindexkeys','sysmembers','sysobjects','syspermissions','sysprotects','sysreferences','systypes','sysusers','sysalternates','sysconstraints','syssegments','REFERENTIAL_CONSTRAINTS','CHECK_CONSTRAINTS','CONSTRAINT_TABLE_USAGE','CONSTRAINT_COLUMN_USAGE','VIEWS','VIEW_TABLE_USAGE','VIEW_COLUMN_USAGE','SCHEMATA','TABLES','TABLE_CONSTRAINTS','TABLE_PRIVILEGES','COLUMNS','COLUMN_DOMAIN_USAGE','COLUMN_PRIVILEGES','DOMAINS','DOMAIN_CONSTRAINTS','KEY_COLUMN_USAGE','dtproperties'))";

	var $metaColumnsSQL = # xtype==61 is datetime

	"select c.name,t.name,c.length,c.isnullable, c.status,

		(case when c.xusertype=61 then 0 else c.xprec end),

		(case when c.xusertype=61 then 0 else c.xscale end)

	from syscolumns c join systypes t on t.xusertype=c.xusertype join sysobjects o on o.id=c.id where o.name='%s'";

	var $hasTop = 'top';		// support mssql SELECT TOP 10 * FROM TABLE

	var $hasGenID = true;

	var $sysDate = 'convert(datetime,convert(char,GetDate(),102),102)';

	var $sysTimeStamp = 'GetDate()';

	var $maxParameterLen = 4000;

	var $arrayClass = 'ADORecordSet_array_mssql';

	var $uniqueSort = true;

	var $leftOuter = '*=';

	var $rightOuter = '=*';

	var $ansiOuter = true; // for mssql7 or later

	var $poorAffectedRows = true;

	var $identitySQL = 'select SCOPE_IDENTITY()'; // 'select SCOPE_IDENTITY'; # for mssql 2000

	var $uniqueOrderBy = true;

	var $_bindInputArray = true;

	var $forceNewConnect = false;

	function ServerInfo()

	{

	global $ADODB_FETCH_MODE;

		if ($this->fetchMode === false) {

			$savem = $ADODB_FETCH_MODE;

			$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		} else

			$savem = $this->SetFetchMode(ADODB_FETCH_NUM);

		if (0) {

			$stmt = $this->PrepareSP('sp_server_info');

			$val = 2;

			$this->Parameter($stmt,$val,'attribute_id');

			$row = $this->GetRow($stmt);

		}

		$row = $this->GetRow("execute sp_server_info 2");

		if ($this->fetchMode === false) {

			$ADODB_FETCH_MODE = $savem;

		} else

			$this->SetFetchMode($savem);

		$arr['description'] = $row[2];

		$arr['version'] = ADOConnection::_findvers($arr['description']);

		return $arr;

	}

	function IfNull( $field, $ifNull )

	{

		return " ISNULL($field, $ifNull) "; // if MS SQL Server

	}

	protected function _insertID($table = '', $column = '')

	{

	// SCOPE_IDENTITY()

	// Returns the last IDENTITY value inserted into an IDENTITY column in

	// the same scope. A scope is a module -- a stored procedure, trigger,

	// function, or batch. Thus, two statements are in the same scope if

	// they are in the same stored procedure, function, or batch.

		if ($this->lastInsID !== false) {

			return $this->lastInsID; // InsID from sp_executesql call

		} else {

			return $this->GetOne($this->identitySQL);

		}

	}

	/**

	 * Correctly quotes a string so that all strings are escaped.

	 * We prefix and append to the string single-quotes.

	 * An example is  $db->qstr("Don't bother");

	 *

	 * @param string $s            The string to quote

	 * @param bool   $magic_quotes This param is not used since 5.21.0.

	 *                             It remains for backwards compatibility.

	 *

	 * @return string Quoted string to be sent back to database

	 *

	 * @noinspection PhpUnusedParameterInspection

	 */

	function qStr($s, $magic_quotes=false)

	{

		return  "'" . str_replace("'", $this->replaceQuote, $s) . "'";

	}

	function _affectedrows()

	{

		return $this->GetOne('select @@rowcount');

	}

	var $_dropSeqSQL = "drop table %s";

	function CreateSequence($seq='adodbseq',$start=1)

	{

		$this->Execute('BEGIN TRANSACTION adodbseq');

		$start -= 1;

		$this->Execute("create table $seq (id float(53))");

		$ok = $this->Execute("insert into $seq with (tablock,holdlock) values($start)");

		if (!$ok) {

				$this->Execute('ROLLBACK TRANSACTION adodbseq');

				return false;

		}

		$this->Execute('COMMIT TRANSACTION adodbseq');

		return true;

	}

	function GenID($seq='adodbseq',$start=1)

	{

		//$this->debug=1;

		$this->Execute('BEGIN TRANSACTION adodbseq');

		$ok = $this->Execute("update $seq with (tablock,holdlock) set id = id + 1");

		if (!$ok) {

			$this->Execute("create table $seq (id float(53))");

			$ok = $this->Execute("insert into $seq with (tablock,holdlock) values($start)");

			if (!$ok) {

				$this->Execute('ROLLBACK TRANSACTION adodbseq');

				return false;

			}

			$this->Execute('COMMIT TRANSACTION adodbseq');

			return $start;

		}

		$num = $this->GetOne("select id from $seq");

		$this->Execute('COMMIT TRANSACTION adodbseq');

		return $num;

		// in old implementation, pre 1.90, we returned GUID...

		//return $this->GetOne("SELECT CONVERT(varchar(255), NEWID()) AS 'Char'");

	}

	function SelectLimit($sql,$nrows=-1,$offset=-1, $inputarr=false,$secs2cache=0)

	{

		$nrows = (int) $nrows;

		$offset = (int) $offset;

		if ($nrows > 0 && $offset <= 0) {

			$sql = preg_replace(

				'/(^\s*select\s+(distinctrow|distinct)?)/i','\\1 '.$this->hasTop." $nrows ",$sql);

			if ($secs2cache)

				$rs = $this->CacheExecute($secs2cache, $sql, $inputarr);

			else

				$rs = $this->Execute($sql,$inputarr);

		} else

			$rs = ADOConnection::SelectLimit($sql,$nrows,$offset,$inputarr,$secs2cache);

		return $rs;

	}

	// Format date column in sql string given an input format that understands Y M D

	function SQLDate($fmt, $col=false)

	{

		if (!$col) $col = $this->sysTimeStamp;

		$s = '';

		$len = strlen($fmt);

		for ($i=0; $i < $len; $i++) {

			if ($s) $s .= '+';

			$ch = $fmt[$i];

			switch($ch) {

			case 'Y':

			case 'y':

				$s .= "datename(yyyy,$col)";

				break;

			case 'M':

				$s .= "convert(char(3),$col,0)";

				break;

			case 'm':

				$s .= "replace(str(month($col),2),' ','0')";

				break;

			case 'Q':

			case 'q':

				$s .= "datename(quarter,$col)";

				break;

			case 'D':

			case 'd':

				$s .= "replace(str(day($col),2),' ','0')";

				break;

			case 'h':

				$s .= "substring(convert(char(14),$col,0),13,2)";

				break;

			case 'H':

				$s .= "replace(str(datepart(hh,$col),2),' ','0')";

				break;

			case 'i':

				$s .= "replace(str(datepart(mi,$col),2),' ','0')";

				break;

			case 's':

				$s .= "replace(str(datepart(ss,$col),2),' ','0')";

				break;

			case 'a':

			case 'A':

				$s .= "substring(convert(char(19),$col,0),18,2)";

				break;

			case 'l':

				$s .= "datename(dw,$col)";

				break;

			default:

				if ($ch == '\\') {

					$i++;

					$ch = substr($fmt,$i,1);

				}

				$s .= $this->qstr($ch);

				break;

			}

		}

		return $s;

	}

	function BeginTrans()

	{

		if ($this->transOff) return true;

		$this->transCnt += 1;

		$ok = $this->Execute('BEGIN TRAN');

		return $ok;

	}

	function CommitTrans($ok=true)

	{

		if ($this->transOff) return true;

		if (!$ok) return $this->RollbackTrans();

		if ($this->transCnt) $this->transCnt -= 1;

		$ok = $this->Execute('COMMIT TRAN');

		return $ok;

	}

	function RollbackTrans()

	{

		if ($this->transOff) return true;

		if ($this->transCnt) $this->transCnt -= 1;

		$ok = $this->Execute('ROLLBACK TRAN');

		return $ok;

	}

	function SetTransactionMode( $transaction_mode )

	{

		$this->_transmode  = $transaction_mode;

		if (empty($transaction_mode)) {

			$this->Execute('SET TRANSACTION ISOLATION LEVEL READ COMMITTED');

			return;

		}

		if (!stristr($transaction_mode,'isolation')) $transaction_mode = 'ISOLATION LEVEL '.$transaction_mode;

		$this->Execute("SET TRANSACTION ".$transaction_mode);

	}

	/*

		Usage:

		$this->BeginTrans();

		$this->RowLock('table1,table2','table1.id=33 and table2.id=table1.id'); # lock row 33 for both tables

		# some operation on both tables table1 and table2

		$this->CommitTrans();

		See http://www.swynk.com/friends/achigrik/SQL70Locks.asp

	*/

	function RowLock($tables,$where,$col='1 as adodbignore')

	{

		if ($col == '1 as adodbignore') $col = 'top 1 null as ignore';

		if (!$this->transCnt) $this->BeginTrans();

		return $this->GetOne("select $col from $tables with (ROWLOCK,HOLDLOCK) where $where");

	}

	function MetaColumns($table, $normalize=true)

	{

//		$arr = ADOConnection::MetaColumns($table);

//		return $arr;

		$this->_findschema($table,$schema);

		if ($schema) {

			$dbName = $this->database;

			$this->SelectDB($schema);

		}

		global $ADODB_FETCH_MODE;

		$save = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);

		$rs = $this->Execute(sprintf($this->metaColumnsSQL,$table));

		if ($schema) {

			$this->SelectDB($dbName);

		}

		if (isset($savem)) $this->SetFetchMode($savem);

		$ADODB_FETCH_MODE = $save;

		if (!is_object($rs)) {

			$false = false;

			return $false;

		}

		$retarr = array();

		while (!$rs->EOF){

			$fld = new ADOFieldObject();

			$fld->name = $rs->fields[0];

			$fld->type = $rs->fields[1];

			$fld->not_null = (!$rs->fields[3]);

			$fld->auto_increment = ($rs->fields[4] == 128);		// sys.syscolumns status field. 0x80 = 128 ref: http://msdn.microsoft.com/en-us/library/ms186816.aspx

			if (isset($rs->fields[5]) && $rs->fields[5]) {

				if ($rs->fields[5]>0) $fld->max_length = $rs->fields[5];

				$fld->scale = $rs->fields[6];

				if ($fld->scale>0) $fld->max_length += 1;

			} else

				$fld->max_length = $rs->fields[2];

			if ($save == ADODB_FETCH_NUM) {

				$retarr[] = $fld;

			} else {

				$retarr[strtoupper($fld->name)] = $fld;

			}

				$rs->MoveNext();

			}

			$rs->Close();

			return $retarr;

	}

	function MetaIndexes($table,$primary=false, $owner=false)

	{

		$table = $this->qstr($table);

		$sql = "SELECT i.name AS ind_name, C.name AS col_name, USER_NAME(O.uid) AS Owner, c.colid, k.Keyno,

			CASE WHEN I.indid BETWEEN 1 AND 254 AND (I.status & 2048 = 2048 OR I.Status = 16402 AND O.XType = 'V') THEN 1 ELSE 0 END AS IsPK,

			CASE WHEN I.status & 2 = 2 THEN 1 ELSE 0 END AS IsUnique

			FROM dbo.sysobjects o INNER JOIN dbo.sysindexes I ON o.id = i.id

			INNER JOIN dbo.sysindexkeys K ON I.id = K.id AND I.Indid = K.Indid

			INNER JOIN dbo.syscolumns c ON K.id = C.id AND K.colid = C.Colid

			WHERE LEFT(i.name, 8) <> '_WA_Sys_' AND o.status >= 0 AND O.Name LIKE $table

			ORDER BY O.name, I.Name, K.keyno";

		global $ADODB_FETCH_MODE;

		$save = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		if ($this->fetchMode !== FALSE) {

			$savem = $this->SetFetchMode(FALSE);

		}

		$rs = $this->Execute($sql);

		if (isset($savem)) {

			$this->SetFetchMode($savem);

		}

		$ADODB_FETCH_MODE = $save;

		if (!is_object($rs)) {

			return FALSE;

		}

		$indexes = array();

		while ($row = $rs->FetchRow()) {

			if ($primary && !$row[5]) continue;

			$indexes[$row[0]]['unique'] = $row[6];

			$indexes[$row[0]]['columns'][] = $row[1];

		}

		return $indexes;

	}

	public function metaForeignKeys($table, $owner = '', $upper = false, $associative = false)

	{

	global $ADODB_FETCH_MODE;

		$save = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		$table = $this->qstr(strtoupper($table));

		$sql =

"select object_name(constid) as constraint_name,

	col_name(fkeyid, fkey) as column_name,

	object_name(rkeyid) as referenced_table_name,

	col_name(rkeyid, rkey) as referenced_column_name

from sysforeignkeys

where upper(object_name(fkeyid)) = $table

order by constraint_name, referenced_table_name, keyno";

		$constraints = $this->GetArray($sql);

		$ADODB_FETCH_MODE = $save;

		$arr = false;

		foreach($constraints as $constr) {

			//print_r($constr);

			$arr[$constr[0]][$constr[2]][] = $constr[1].'='.$constr[3];

		}

		if (!$arr) return false;

		$arr2 = false;

		foreach($arr as $k => $v) {

			foreach($v as $a => $b) {

				if ($upper) $a = strtoupper($a);

				if (is_array($arr2[$a])) {	// a previous foreign key was define for this reference table, we merge the new one

					$arr2[$a] = array_merge($arr2[$a], $b);

				} else {

					$arr2[$a] = $b;

				}

			}

		}

		return $arr2;

	}

	//From: Fernando Moreira <FMoreira@imediata.pt>

	function MetaDatabases()

	{

		if(@mssql_select_db("master")) {

			$qry = $this->metaDatabasesSQL;

			if($rs = @mssql_query($qry,$this->_connectionID)) {

				$tmpAr = $ar = array();

				while($tmpAr = @mssql_fetch_row($rs)) {

					$ar[]=$tmpAr[0];

				}

				@mssql_select_db($this->database);

				if(sizeof($ar)) {

					return($ar);

				} else {

					return(false);

				}

			} else {

				@mssql_select_db($this->database);

				return(false);

			}

		}

		return(false);

	}

	// "Stein-Aksel Basma" <basma@accelero.no>

	// tested with MSSQL 2000

	function MetaPrimaryKeys($table, $owner=false)

	{

	global $ADODB_FETCH_MODE;

		$schema = '';

		$this->_findschema($table,$schema);

		if (!$schema) $schema = $this->database;

		if ($schema) $schema = "and k.table_catalog like '$schema%'";

		$sql = "select distinct k.column_name,ordinal_position from information_schema.key_column_usage k,

		information_schema.table_constraints tc

		where tc.constraint_name = k.constraint_name and tc.constraint_type =

		'PRIMARY KEY' and k.table_name = '$table' $schema order by ordinal_position ";

		$savem = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

		$a = $this->GetCol($sql);

		$ADODB_FETCH_MODE = $savem;

		if ($a && sizeof($a)>0) return $a;

		$false = false;

		return $false;

	}

	function MetaTables($ttype=false,$showSchema=false,$mask=false)

	{

		if ($mask) {

			$save = $this->metaTablesSQL;

			$mask = $this->qstr(($mask));

			$this->metaTablesSQL .= " AND name like $mask";

		}

		$ret = ADOConnection::MetaTables($ttype,$showSchema);

		if ($mask) {

			$this->metaTablesSQL = $save;

		}

		return $ret;

	}

	function SelectDB($dbName)

	{

		$this->database = $dbName;

		if ($this->_connectionID) {

			return @mssql_select_db($dbName);

		}

		else return false;

	}

	function ErrorMsg()

	{

		if (empty($this->_errorMsg)){

			$this->_errorMsg = mssql_get_last_message();

		}

		return $this->_errorMsg;

	}

	function ErrorNo()

	{

		if ($this->_logsql && $this->_errorCode !== false) return $this->_errorCode;

		if (empty($this->_errorMsg)) {

			$this->_errorMsg = mssql_get_last_message();

		}

		$id = @mssql_query("select @@ERROR",$this->_connectionID);

		if (!$id) return false;

		$arr = mssql_fetch_array($id);

		@mssql_free_result($id);

		if (is_array($arr)) {

			return $arr[0];

		} else {

			return -1;

		}

	}

	// returns true or false, newconnect supported since php 5.1.0.

	function _connect($argHostname, $argUsername, $argPassword, $argDatabasename,$newconnect=false)

	{

		if (!function_exists('mssql_pconnect')) return null;

		if (!empty($this->port)) $argHostname .= ":".$this->port;

		$this->_connectionID = mssql_connect($argHostname,$argUsername,$argPassword,$newconnect);

		if ($this->_connectionID === false) return false;

		if ($argDatabasename) return $this->SelectDB($argDatabasename);

		return true;

	}

	// returns true or false

	function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)

	{

		if (!function_exists('mssql_pconnect')) return null;

		if (!empty($this->port)) $argHostname .= ":".$this->port;

		$this->_connectionID = mssql_pconnect($argHostname,$argUsername,$argPassword);

		if ($this->_connectionID === false) return false;

		// persistent connections can forget to rollback on crash, so we do it here.

		if ($this->autoRollback) {

			$cnt = $this->GetOne('select @@TRANCOUNT');

			while (--$cnt >= 0) $this->Execute('ROLLBACK TRAN');

		}

		if ($argDatabasename) return $this->SelectDB($argDatabasename);

		return true;

	}

	function _nconnect($argHostname, $argUsername, $argPassword, $argDatabasename)

	{

		return $this->_connect($argHostname, $argUsername, $argPassword, $argDatabasename, true);

	}

	function Prepare($sql)

	{

		$sqlarr = explode('?',$sql);

		if (sizeof($sqlarr) <= 1) return $sql;

		$sql2 = $sqlarr[0];

		for ($i = 1, $max = sizeof($sqlarr); $i < $max; $i++) {

			$sql2 .=  '@P'.($i-1) . $sqlarr[$i];

		}

		return array($sql,$this->qstr($sql2),$max,$sql2);

	}

	function PrepareSP($sql,$param=true)

	{

		$stmt = mssql_init($sql,$this->_connectionID);

		if (!$stmt)  return $sql;

		return array($sql,$stmt);

	}

	// returns concatenated string

	// MSSQL requires integers to be cast as strings

	// automatically cast every datatype to VARCHAR(255)

	// @author David Rogers (introspectshun)

	function Concat()

	{

			$s = "";

			$arr = func_get_args();

			// Split single record on commas, if possible

			if (sizeof($arr) == 1) {

				foreach ($arr as $arg) {

					$args = explode(',', $arg);

				}

				$arr = $args;

			}

			array_walk(

				$arr,

				function(&$value, $key) {

					$value = "CAST(" . $value . " AS VARCHAR(255))";

				}

			);

			$s = implode('+',$arr);

			if (sizeof($arr) > 0) return "$s";

			return '';

	}

	/*

	Usage:

		$stmt = $db->PrepareSP('SP_RUNSOMETHING'); -- takes 2 params, @myid and @group

		# note that the parameter does not have @ in front!

		$db->Parameter($stmt,$id,'myid');

		$db->Parameter($stmt,$group,'group',false,64);

		$db->Execute($stmt);

		@param $stmt Statement returned by Prepare() or PrepareSP().

		@param $var PHP variable to bind to. Can set to null (for isNull support).

		@param $name Name of stored procedure variable name to bind to.

		@param [$isOutput] Indicates direction of parameter 0/false=IN  1=OUT  2= IN/OUT. This is ignored in oci8.

		@param [$maxLen] Holds an maximum length of the variable.

		@param [$type] The data type of $var. Legal values depend on driver.

		See mssql_bind documentation at php.net.

	*/

	function Parameter(&$stmt, &$var, $name, $isOutput=false, $maxLen=4000, $type=false)

	{

		$isNull = is_null($var); // php 4.0.4 and above...

		if ($type === false)

			switch(gettype($var)) {

			default:

			case 'string': $type = SQLVARCHAR; break;

			case 'double': $type = SQLFLT8; break;

			case 'integer': $type = SQLINT4; break;

			case 'boolean': $type = SQLINT1; break; # SQLBIT not supported in 4.1.0

		}

		if  ($this->debug) {

			$prefix = ($isOutput) ? 'Out' : 'In';

			$ztype = (empty($type)) ? 'false' : $type;

			ADOConnection::outp( "{$prefix}Parameter(\$stmt, \$php_var='$var', \$name='$name', \$maxLen=$maxLen, \$type=$ztype);");

		}

		/*

			See PHPLens Issue No: 7231

			RETVAL is HARD CODED into php_mssql extension:

			The return value (a long integer value) is treated like a special OUTPUT parameter,

			called "RETVAL" (without the @). See the example at mssql_execute to

			see how it works. - type: one of this new supported PHP constants.

				SQLTEXT, SQLVARCHAR,SQLCHAR, SQLINT1,SQLINT2, SQLINT4, SQLBIT,SQLFLT8

		*/

		if ($name !== 'RETVAL') $name = '@'.$name;

		return mssql_bind($stmt[1], $name, $var, $type, $isOutput, $isNull, $maxLen);

	}

	/*

		Unfortunately, it appears that mssql cannot handle varbinary > 255 chars

		So all your blobs must be of type "image".

		Remember to set in php.ini the following...

		; Valid range 0 - 2147483647. Default = 4096.

		mssql.textlimit = 0 ; zero to pass through

		; Valid range 0 - 2147483647. Default = 4096.

		mssql.textsize = 0 ; zero to pass through

	*/

	function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')

	{

		if (strtoupper($blobtype) == 'CLOB') {

			$sql = "UPDATE $table SET $column='" . $val . "' WHERE $where";

			return $this->Execute($sql) != false;

		}

		$sql = "UPDATE $table SET $column=0x".bin2hex($val)." WHERE $where";

		return $this->Execute($sql) != false;

	}

	function _query($sql,$inputarr=false)

	{

		$this->_errorMsg = false;

		if (is_array($inputarr)) {

			# bind input params with sp_executesql:

			# see http://www.quest-pipelines.com/newsletter-v3/0402_F.htm

			# works only with sql server 7 and newer

			$getIdentity = false;

			if (!is_array($sql) && preg_match('/^\\s*insert/i', $sql)) {

				$getIdentity = true;

				$sql .= (preg_match('/;\\s*$/i', $sql) ? ' ' : '; ') . $this->identitySQL;

			}

			if (!is_array($sql)) $sql = $this->Prepare($sql);

			$params = '';

			$decl = '';

			$i = 0;

			foreach($inputarr as $v) {

				if ($decl) {

					$decl .= ', ';

					$params .= ', ';

				}

				if (is_string($v)) {

					$len = strlen($v);

					if ($len == 0) $len = 1;

					if ($len > 4000 ) {

						// NVARCHAR is max 4000 chars. Let's use NTEXT

						$decl .= "@P$i NTEXT";

					} else {

						$decl .= "@P$i NVARCHAR($len)";

					}

					if(substr($v,0,1) == "'" && substr($v,-1,1) == "'")

						/*

						* String is already fully quoted

						*/

						$inputVar = $v;

					else

						$inputVar = $db->this($v);

					$params .= "@P$i=N" . $inputVar;

				} else if (is_integer($v)) {

					$decl .= "@P$i INT";

					$params .= "@P$i=".$v;

				} else if (is_float($v)) {

					$decl .= "@P$i FLOAT";

					$params .= "@P$i=".$v;

				} else if (is_bool($v)) {

					$decl .= "@P$i INT"; # Used INT just in case BIT in not supported on the user's MSSQL version. It will cast appropriately.

					$params .= "@P$i=".(($v)?'1':'0'); # True == 1 in MSSQL BIT fields and acceptable for storing logical true in an int field

				} else {

					$decl .= "@P$i CHAR"; # Used char because a type is required even when the value is to be NULL.

					$params .= "@P$i=NULL";

					}

				$i += 1;

			}

			$decl = $this->qstr($decl);

			if ($this->debug) ADOConnection::outp("<font size=-1>sp_executesql N{$sql[1]},N$decl,$params</font>");

			$rez = mssql_query("sp_executesql N{$sql[1]},N$decl,$params", $this->_connectionID);

			if ($getIdentity) {

				$arr = @mssql_fetch_row($rez);

				$this->lastInsID = isset($arr[0]) ? $arr[0] : false;

				@mssql_data_seek($rez, 0);

			}

		} else if (is_array($sql)) {

			# PrepareSP()

			$rez = mssql_execute($sql[1]);

			$this->lastInsID = false;

		} else {

			$rez = mssql_query($sql,$this->_connectionID);

			$this->lastInsID = false;

		}

		return $rez;

	}

	// returns true or false

	function _close()

	{

		if ($this->transCnt) {

			$this->RollbackTrans();

		}

		if($this->_connectionID) {

			$rez = mssql_close($this->_connectionID);

		}

		$this->_connectionID = false;

		return $rez;

	}

	/**

	* Returns a substring of a varchar type field

	*

	* The SQL server version varies because the length is mandatory, so

	* we append a reasonable string length

	*

	* @param	string	$fld	The field to sub-string

	* @param	int		$start	The start point

	* @param	int		$length	An optional length

	*

	* @return	The SQL text

	*/

	function substr($fld,$start,$length=0)

	{

		if ($length == 0)

			/*

		     * The length available to varchar is 2GB, but that makes no

			 * sense in a substring, so I'm going to arbitrarily limit

			 * the length to 1K, but you could change it if you want

			 */

			$length = 1024;

		$text = "SUBSTRING($fld,$start,$length)";

		return $text;

	}

}

/*--------------------------------------------------------------------------------------

	Class Name: Recordset

--------------------------------------------------------------------------------------*/

class ADORecordset_mssql extends ADORecordSet {

	var $databaseType = "mssql";

	var $canSeek = true;

	var $hasFetchAssoc; // see PHPLens Issue No: 6083

	// _mths works only in non-localised system

	function __construct($id,$mode=false)

	{

		// freedts check...

		$this->hasFetchAssoc = function_exists('mssql_fetch_assoc');

		if ($mode === false) {

			global $ADODB_FETCH_MODE;

			$mode = $ADODB_FETCH_MODE;

		}

		$this->fetchMode = $mode;

		return parent::__construct($id);

	}

	function _initrs()

	{

	GLOBAL $ADODB_COUNTRECS;

		$this->_numOfRows = ($ADODB_COUNTRECS)? @mssql_num_rows($this->_queryID):-1;

		$this->_numOfFields = @mssql_num_fields($this->_queryID);

	}

	//Contributed by "Sven Axelsson" <sven.axelsson@bokochwebb.se>

	// get next resultset - requires PHP 4.0.5 or later

	function NextRecordSet()

	{

		if (!mssql_next_result($this->_queryID)) return false;

		$this->_inited = false;

		$this->bind = false;

		$this->_currentRow = -1;

		$this->Init();

		return true;

	}

	/* Use associative array to get fields array */

	function Fields($colname)

	{

		if ($this->fetchMode != ADODB_FETCH_NUM) return $this->fields[$colname];

		if (!$this->bind) {

			$this->bind = array();

			for ($i=0; $i < $this->_numOfFields; $i++) {

				$o = $this->FetchField($i);

				$this->bind[strtoupper($o->name)] = $i;

			}

		}

		return $this->fields[$this->bind[strtoupper($colname)]];

	}

	/*	Returns: an object containing field information.

		Get column information in the Recordset object. fetchField() can be used in order to obtain information about

		fields in a certain query result. If the field offset isn't specified, the next field that wasn't yet retrieved by

		fetchField() is retrieved.	*/

	function FetchField($fieldOffset = -1)

	{

		if ($fieldOffset != -1) {

			$f = @mssql_fetch_field($this->_queryID, $fieldOffset);

		}

		else if ($fieldOffset == -1) {	/*	The $fieldOffset argument is not provided thus its -1 	*/

			$f = @mssql_fetch_field($this->_queryID);

		}

		$false = false;

		if (empty($f)) return $false;

		return $f;

	}

	function _seek($row)

	{

		return @mssql_data_seek($this->_queryID, $row);

	}

	// speedup

	function MoveNext()

	{

		if ($this->EOF) return false;

		$this->_currentRow++;

		if ($this->fetchMode & ADODB_FETCH_ASSOC) {

			if ($this->fetchMode & ADODB_FETCH_NUM) {

				//ADODB_FETCH_BOTH mode

				$this->fields = @mssql_fetch_array($this->_queryID);

			}

			else {

				if ($this->hasFetchAssoc) {// only for PHP 4.2.0 or later

					$this->fields = @mssql_fetch_assoc($this->_queryID);

				} else {

					$flds = @mssql_fetch_array($this->_queryID);

					if (is_array($flds)) {

						$fassoc = array();

						foreach($flds as $k => $v) {

							if (is_numeric($k)) continue;

							$fassoc[$k] = $v;

						}

						$this->fields = $fassoc;

					} else

						$this->fields = false;

				}

			}

			if (is_array($this->fields)) {

				if (ADODB_ASSOC_CASE == 0) {

					foreach($this->fields as $k=>$v) {

						$kn = strtolower($k);

						if ($kn <> $k) {

							unset($this->fields[$k]);

							$this->fields[$kn] = $v;

						}

					}

				} else if (ADODB_ASSOC_CASE == 1) {

					foreach($this->fields as $k=>$v) {

						$kn = strtoupper($k);

						if ($kn <> $k) {

							unset($this->fields[$k]);

							$this->fields[$kn] = $v;

						}

					}

				}

			}

		} else {

			$this->fields = @mssql_fetch_row($this->_queryID);

		}

		if ($this->fields) return true;

		$this->EOF = true;

		return false;

	}

	// INSERT UPDATE DELETE returns false even if no error occurs in 4.0.4

	// also the date format has been changed from YYYY-mm-dd to dd MMM YYYY in 4.0.4. Idiot!

	function _fetch($ignore_fields=false)

	{

		if ($this->fetchMode & ADODB_FETCH_ASSOC) {

			if ($this->fetchMode & ADODB_FETCH_NUM) {

				//ADODB_FETCH_BOTH mode

				$this->fields = @mssql_fetch_array($this->_queryID);

			} else {

				if ($this->hasFetchAssoc) // only for PHP 4.2.0 or later

					$this->fields = @mssql_fetch_assoc($this->_queryID);

				else {

					$this->fields = @mssql_fetch_array($this->_queryID);

					if (@is_array($this->fields)) {

						$fassoc = array();