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+<?php
+/*
+@version   v5.20.14  06-Jan-2019
+@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.org/
+
+  DB2 data driver. Requires ODBC.
+
+From phpdb list:
+
+Hi Andrew,
+
+thanks a lot for your help. Today we discovered what
+our real problem was:
+
+After "playing" a little bit with the php-scripts that try
+to connect to the IBM DB2, we set the optional parameter
+Cursortype when calling odbc_pconnect(....).
+
+And the exciting thing: When we set the cursor type
+to SQL_CUR_USE_ODBC Cursor Type, then
+the whole query speed up from 1 till 10 seconds
+to 0.2 till 0.3 seconds for 100 records. Amazing!!!
+
+Therfore, PHP is just almost fast as calling the DB2
+from Servlets using JDBC (don't take too much care
+about the speed at whole: the database was on a
+completely other location, so the whole connection
+was made over a slow network connection).
+
+I hope this helps when other encounter the same
+problem when trying to connect to DB2 from
+PHP.
+
+Kind regards,
+Christian Szardenings
+
+2 Oct 2001
+Mark Newnham has discovered that the SQL_CUR_USE_ODBC is not supported by
+IBM's DB2 ODBC driver, so this must be a 3rd party ODBC driver.
+
+From the IBM CLI Reference:
+
+SQL_ATTR_ODBC_CURSORS (DB2 CLI v5)
+This connection attribute is defined by ODBC, but is not supported by DB2
+CLI. Any attempt to set or get this attribute will result in an SQLSTATE of
+HYC00 (Driver not capable).
+
+A 32-bit option specifying how the Driver Manager uses the ODBC cursor
+library.
+
+So I guess this means the message [above] was related to using a 3rd party
+odbc driver.
+
+Setting SQL_CUR_USE_ODBC
+========================
+To set SQL_CUR_USE_ODBC for drivers that require it, do this:
+
+$db = NewADOConnection('odbc_db2');
+$db->curMode = SQL_CUR_USE_ODBC;
+$db->Connect($dsn, $userid, $pwd);
+
+
+
+USING CLI INTERFACE
+===================
+
+I have had reports that the $host and $database params have to be reversed in
+Connect() when using the CLI interface. From Halmai Csongor csongor.halmai#nexum.hu:
+
+> The symptom is that if I change the database engine from postgres or any other to DB2 then the following
+> connection command becomes wrong despite being described this version to be correct in the docs.
+>
+> $connection_object->Connect( $DATABASE_HOST, $DATABASE_AUTH_USER_NAME, $DATABASE_AUTH_PASSWORD, $DATABASE_NAME )
+>
+> In case of DB2 I had to swap the first and last arguments in order to connect properly.
+
+
+System Error 5
+==============
+IF you get a System Error 5 when trying to Connect/Load, it could be a permission problem. Give the user connecting
+to DB2 full rights to the DB2 SQLLIB directory, and place the user in the DBUSERS group.
+*/
+
+// security - hide paths
+if (!defined('ADODB_DIR')) die();
+
+if (!defined('_ADODB_ODBC_LAYER')) {
+	include(ADODB_DIR."/drivers/adodb-odbc.inc.php");
+}
+if (!defined('ADODB_ODBC_DB2')){
+define('ADODB_ODBC_DB2',1);
+
+class ADODB_ODBC_DB2 extends ADODB_odbc {
+	var $databaseType = "db2";
+	var $concat_operator = '||';
+	var $sysTime = 'CURRENT TIME';
+	var $sysDate = 'CURRENT DATE';
+	var $sysTimeStamp = 'CURRENT TIMESTAMP';
+	// The complete string representation of a timestamp has the form
+	// yyyy-mm-dd-hh.mm.ss.nnnnnn.
+	var $fmtTimeStamp = "'Y-m-d-H.i.s'";
+	var $ansiOuter = true;
+	var $identitySQL = 'values IDENTITY_VAL_LOCAL()';
+	var $_bindInputArray = true;
+	 var $hasInsertID = true;
+	var $rsPrefix = 'ADORecordset_odbc_';
+
+	function __construct()
+	{
+		if (strncmp(PHP_OS,'WIN',3) === 0) $this->curmode = SQL_CUR_USE_ODBC;
+		parent::__construct();
+	}
+
+	function IfNull( $field, $ifNull )
+	{
+		return " COALESCE($field, $ifNull) "; // if DB2 UDB
+	}
+
+	function ServerInfo()
+	{
+		//odbc_setoption($this->_connectionID,1,101 /*SQL_ATTR_ACCESS_MODE*/, 1 /*SQL_MODE_READ_ONLY*/);
+		$vers = $this->GetOne('select versionnumber from sysibm.sysversions');
+		//odbc_setoption($this->_connectionID,1,101, 0 /*SQL_MODE_READ_WRITE*/);
+		return array('description'=>'DB2 ODBC driver', 'version'=>$vers);
+	}
+
+	function _insertid()
+	{
+		return $this->GetOne($this->identitySQL);
+	}
+
+	function RowLock($tables,$where,$col='1 as adodbignore')
+	{
+		if ($this->_autocommit) $this->BeginTrans();
+		return $this->GetOne("select $col from $tables where $where for update");
+	}
+
+	function MetaTables($ttype=false,$showSchema=false, $qtable="%", $qschema="%")
+	{
+	global $ADODB_FETCH_MODE;
+
+		$savem = $ADODB_FETCH_MODE;
+		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
+		$qid = odbc_tables($this->_connectionID, "", $qschema, $qtable, "");
+
+		$rs = new ADORecordSet_odbc($qid);
+
+		$ADODB_FETCH_MODE = $savem;
+		if (!$rs) {
+			$false = false;
+			return $false;
+		}
+		$rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
+
+		$arr = $rs->GetArray();
+		//print_r($arr);
+
+		$rs->Close();
+		$arr2 = array();
+
+		if ($ttype) {
+			$isview = strncmp($ttype,'V',1) === 0;
+		}
+		for ($i=0; $i < sizeof($arr); $i++) {
+
+			if (!$arr[$i][2]) continue;
+			if (strncmp($arr[$i][1],'SYS',3) === 0) continue;
+
+			$type = $arr[$i][3];
+
+			if ($showSchema) $arr[$i][2] = $arr[$i][1].'.'.$arr[$i][2];
+
+			if ($ttype) {
+				if ($isview) {
+					if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
+				} else if (strncmp($type,'T',1) === 0) $arr2[] = $arr[$i][2];
+			} else if (strncmp($type,'S',1) !== 0) $arr2[] = $arr[$i][2];
+		}
+		return $arr2;
+	}
+
+	function MetaIndexes ($table, $primary = FALSE, $owner=false)
+	{
+        // save old fetch mode
+        global $ADODB_FETCH_MODE;
+        $save = $ADODB_FETCH_MODE;
+        $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
+        if ($this->fetchMode !== FALSE) {
+               $savem = $this->SetFetchMode(FALSE);
+        }
+		$false = false;
+		// get index details
+		$table = strtoupper($table);
+		$SQL="SELECT NAME, UNIQUERULE, COLNAMES FROM SYSIBM.SYSINDEXES WHERE TBNAME='$table'";
+        if ($primary)
+			$SQL.= " AND UNIQUERULE='P'";
+		$rs = $this->Execute($SQL);
+        if (!is_object($rs)) {
+			if (isset($savem))
+				$this->SetFetchMode($savem);
+			$ADODB_FETCH_MODE = $save;
+            return $false;
+        }
+		$indexes = array ();
+        // parse index data into array
+        while ($row = $rs->FetchRow()) {
+			$indexes[$row[0]] = array(
+			   'unique' => ($row[1] == 'U' || $row[1] == 'P'),
+			   'columns' => array()
+			);
+			$cols = ltrim($row[2],'+');
+			$indexes[$row[0]]['columns'] = explode('+', $cols);
+        }
+		if (isset($savem)) {
+            $this->SetFetchMode($savem);
+			$ADODB_FETCH_MODE = $save;
+		}
+        return $indexes;
+	}
+
+	// Format date column in sql string given an input format that understands Y M D
+	function SQLDate($fmt, $col=false)
+	{
+	// use right() and replace() ?
+		if (!$col) $col = $this->sysDate;
+		$s = '';
+
+		$len = strlen($fmt);
+		for ($i=0; $i < $len; $i++) {
+			if ($s) $s .= '||';
+			$ch = $fmt[$i];
+			switch($ch) {
+			case 'Y':
+			case 'y':
+				$s .= "char(year($col))";
+				break;
+			case 'M':
+				$s .= "substr(monthname($col),1,3)";
+				break;
+			case 'm':
+				$s .= "right(digits(month($col)),2)";
+				break;
+			case 'D':
+			case 'd':
+				$s .= "right(digits(day($col)),2)";
+				break;
+			case 'H':
+			case 'h':
+				if ($col != $this->sysDate) $s .= "right(digits(hour($col)),2)";
+				else $s .= "''";
+				break;
+			case 'i':
+			case 'I':
+				if ($col != $this->sysDate)
+					$s .= "right(digits(minute($col)),2)";
+					else $s .= "''";
+				break;
+			case 'S':
+			case 's':
+				if ($col != $this->sysDate)
+					$s .= "right(digits(second($col)),2)";
+				else $s .= "''";
+				break;
+			default:
+				if ($ch == '\\') {
+					$i++;
+					$ch = substr($fmt,$i,1);
+				}
+				$s .= $this->qstr($ch);
+			}
+		}
+		return $s;
+	}
+
+
+	function SelectLimit($sql, $nrows = -1, $offset = -1, $inputArr = false, $secs2cache = 0)
+	{
+		$nrows = (integer) $nrows;
+		if ($offset <= 0) {
+		// could also use " OPTIMIZE FOR $nrows ROWS "
+			if ($nrows >= 0) $sql .=  " FETCH FIRST $nrows ROWS ONLY ";
+			$rs = $this->Execute($sql,$inputArr);
+		} else {
+			if ($offset > 0 && $nrows < 0);
+			else {
+				$nrows += $offset;
+				$sql .=  " FETCH FIRST $nrows ROWS ONLY ";
+			}
+			$rs = ADOConnection::SelectLimit($sql,-1,$offset,$inputArr);
+		}
+
+		return $rs;
+	}
+
+};
+
+
+class  ADORecordSet_odbc_db2 extends ADORecordSet_odbc {
+
+	var $databaseType = "db2";
+
+	function __construct($id,$mode=false)
+	{
+		parent::__construct($id,$mode);
+	}
+
+	function MetaType($t,$len=-1,$fieldobj=false)
+	{
+		if (is_object($t)) {
+			$fieldobj = $t;
+			$t = $fieldobj->type;
+			$len = $fieldobj->max_length;
+		}
+
+		switch (strtoupper($t)) {
+		case 'VARCHAR':
+		case 'CHAR':
+		case 'CHARACTER':
+		case 'C':
+			if ($len <= $this->blobSize) return 'C';
+
+		case 'LONGCHAR':
+		case 'TEXT':
+		case 'CLOB':
+		case 'DBCLOB': // double-byte
+		case 'X':
+			return 'X';
+
+		case 'BLOB':
+		case 'GRAPHIC':
+		case 'VARGRAPHIC':
+			return 'B';
+
+		case 'DATE':
+		case 'D':
+			return 'D';
+
+		case 'TIME':
+		case 'TIMESTAMP':
+		case 'T':
+			return 'T';
+
+		//case 'BOOLEAN':
+		//case 'BIT':
+		//	return 'L';
+
+		//case 'COUNTER':
+		//	return 'R';
+
+		case 'INT':
+		case 'INTEGER':
+		case 'BIGINT':
+		case 'SMALLINT':
+		case 'I':
+			return 'I';
+
+		default: return 'N';
+		}
+	}
+}
+
+} //define