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<?php
/*
@version   v5.20.9  21-Dec-2016
@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
@copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
  Released under both BSD license and Lesser GPL library license.
  Whenever there is any discrepancy between the two licenses,
  the BSD license will take precedence.
Set tabs to 4 for best viewing.

Latest version is available at http://adodb.sourceforge.net

Microsoft SQL Server ADO data driver. Requires ADO and MSSQL client.
  Works only on MS Windows.

Warning: Some versions of PHP (esp PHP4) leak memory when ADO/COM is used.
  Please check http://bugs.php.net/ for more info.
*/

// security - hide paths
if (!defined('ADODB_DIR')) die();

if (!defined('_ADODB_ADO_LAYER')) {
	if (PHP_VERSION >= 5) include(ADODB_DIR."/drivers/adodb-ado5.inc.php");
	else include(ADODB_DIR."/drivers/adodb-ado.inc.php");
}

class  ADODB_ado_mssql extends ADODB_ado {
	var $databaseType = 'ado_mssql';
	var $hasTop = 'top';
	var $hasInsertID = true;
	var $sysDate = 'convert(datetime,convert(char,GetDate(),102),102)';
	var $sysTimeStamp = 'GetDate()';
	var $leftOuter = '*=';
	var $rightOuter = '=*';
	var $ansiOuter = true; // for mssql7 or later
	var $substr = "substring";
	var $length = 'len';
	var $_dropSeqSQL = "drop table %s";

//var $_inTransaction = 1; // always open recordsets, so no transaction problems.

function _insertid()
	{
	        return $this->GetOne('select SCOPE_IDENTITY()');
	}

function _affectedrows()
	{
	        return $this->GetOne('select @@rowcount');
	}

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);
	}

function qstr($s,$magic_quotes=false)
	{
		$s = ADOConnection::qstr($s, $magic_quotes);
		return str_replace("\0", "\\\\000", $s);
	}

function MetaColumns($table, $normalize=true)
	{
        $table = strtoupper($table);
        $arr= array();
        $dbc = $this->_connectionID;

$osoptions = array();
        $osoptions[0] = null;
        $osoptions[1] = null;
        $osoptions[2] = $table;
        $osoptions[3] = null;

$adors=@$dbc->OpenSchema(4, $osoptions);//tables

if ($adors){
                while (!$adors->EOF){
                        $fld = new ADOFieldObject();
                        $c = $adors->Fields(3);
                        $fld->name = $c->Value;
                        $fld->type = 'CHAR'; // cannot discover type in ADO!
                        $fld->max_length = -1;
                        $arr[strtoupper($fld->name)]=$fld;

$adors->MoveNext();
                }
                $adors->Close();
        }
        $false = false;
		return empty($arr) ? $false : $arr;
	}

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'");
	}

} // end class

class  ADORecordSet_ado_mssql extends ADORecordSet_ado {

var $databaseType = 'ado_mssql';

function __construct($id,$mode=false)
	{
	        return parent::__construct($id,$mode);
	}
}