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<?php

/* 

V4.80 8 Mar 2006  (c) 2000-2006 John Lim (jlim@natsoft.com.my). All rights reserved.

  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

  MSSQL support via ODBC. Requires ODBC. Works on Windows and Unix. 

  For Unix configuration, see http://phpbuilder.com/columns/alberto20000919.php3

*/

// security - hide paths

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

if (!defined('_ADODB_ODBC_LAYER')) {

	include(ADODB_DIR."/drivers/adodb-odbc.inc.php");

}

class  ADODB_odbc_mssql extends ADODB_odbc {	

	var $databaseType = 'odbc_mssql';

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

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

	var $_bindInputArray = true;

	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'))";

	var $metaColumnsSQL = "select c.name,t.name,c.length 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/interbase SELECT TOP 10 * FROM TABLE

	var $sysDate = 'GetDate()';

	var $sysTimeStamp = 'GetDate()';

	var $leftOuter = '*=';

	var $rightOuter = '=*';

	var $substr = 'substring';

	var $length = 'len';

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

	var $identitySQL = 'select @@IDENTITY'; // 'select SCOPE_IDENTITY'; # for mssql 2000

	var $hasInsertID = true;

	var $connectStmt = 'SET CONCAT_NULL_YIELDS_NULL OFF'; # When SET CONCAT_NULL_YIELDS_NULL is ON, 

														  # concatenating a null value with a string yields a NULL result

	function ADODB_odbc_mssql()

	{

		$this->ADODB_odbc();

		//$this->curmode = SQL_CUR_USE_ODBC;	

	}

	// crashes php...

	function ServerInfo()

	{

	global $ADODB_FETCH_MODE;

		$save = $ADODB_FETCH_MODE;

		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;

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

		$ADODB_FETCH_MODE = $save;

		if (!is_array($row)) return false;

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

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

		return $arr;

	}

	function IfNull( $field, $ifNull ) 

	{

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

	}

	function _insertid()

	{

	// 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.

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

	}

	function MetaForeignKeys($table, $owner=false, $upper=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);

				$arr2[$a] = $b;

			}

		}

		return $arr2;

	}

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

	{

		if ($mask) {$this->debug=1;

			$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 &MetaColumns($table)

	{

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

		return $arr;

	}

	function _query($sql,$inputarr)

	{

		if (is_string($sql)) $sql = str_replace('||','+',$sql);

		return ADODB_odbc::_query($sql,$inputarr);

	}

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

	// tested with MSSQL 2000

	function &MetaPrimaryKeys($table)

	{

	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_ASSOC;

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

		$ADODB_FETCH_MODE = $savem;

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

		$false = false;

		return $false;	  

	}

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

	{

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

			$sql = preg_replace(

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

			$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;

			default:

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

					$i++;

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

				}

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

				break;

			}

		}

		return $s;

	}

} 

class  ADORecordSet_odbc_mssql extends ADORecordSet_odbc {	

	var $databaseType = 'odbc_mssql';

	function ADORecordSet_odbc_mssql($id,$mode=false)

	{

		return $this->ADORecordSet_odbc($id,$mode);

	}	

}

?>