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See Release Notes

  • Bug fixes for general core bugs in 4.3.x will end 7 October 2024 (12 months).
  • Bug fixes for security issues in 4.3.x will end 21 April 2025 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.2.x is supported too.
<?php
/**
 * MSSQL driver via ODBC
 *
 * 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();

if (!defined('_ADODB_ODBC_LAYER')) {
	include_once(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\TH:i:s'";
	var $_bindInputArray = 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'))";
	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/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 SCOPE_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
> /** > * When SET CONCAT_NULL_YIELDS_NULL is ON, concatenating a null value with > * a string yields a NULL result. > * @var string SQL statement executed after successful connection. > */ > public $connectStmt = 'SET CONCAT_NULL_YIELDS_NULL OFF'; #
// 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, $ifNull) "; // if MS SQL Server } protected function _insertID($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. return $this->GetOne($this->identitySQL); } 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); $arr2[$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, $normalize=true) { $this->_findschema($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 $indexes; } function _query($sql,$inputarr=false) { if (is_string($sql)) $sql = str_replace('||','+',$sql); return ADODB_odbc::_query($sql,$inputarr); } 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); } // "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_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) { $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); $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; } /** * 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; } /** * Returns the maximum size of a MetaType C field. Because of the * database design, SQL Server places no limits on the size of data inserted * Although the actual limit is 2^31-1 bytes. * * @return int */ function charMax() { return ADODB_STRINGMAX_NOLIMIT; } /** * Returns the maximum size of a MetaType X field. Because of the * database design, SQL Server places no limits on the size of data inserted * Although the actual limit is 2^31-1 bytes. * * @return int */ function textMax() { return ADODB_STRINGMAX_NOLIMIT; } // 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 ''; } } class ADORecordSet_odbc_mssql extends ADORecordSet_odbc { var $databaseType = 'odbc_mssql'; }