Adding upstream version 2.11.4.upstream/2.11.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 827 insertions, 0 deletions

diff --git a/library/vendor/Zend/Db/Adapter/Db2.php b/library/vendor/Zend/Db/Adapter/Db2.php
new file mode 100644
index 0000000..28793d1
--- /dev/null
+++ b/library/vendor/Zend/Db/Adapter/Db2.php
@@ -0,0 +1,827 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Db
+ * @subpackage Adapter
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id$
+ *
+ */
+
+/**
+ * @see Zend_Db
+ */
+
+/**
+ * @see Zend_Db_Adapter_Abstract
+ */
+
+/**
+ * @see Zend_Db_Statement_Db2
+ */
+
+
+/**
+ * @package    Zend_Db
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+class Zend_Db_Adapter_Db2 extends Zend_Db_Adapter_Abstract
+{
+    /**
+     * User-provided configuration.
+     *
+     * Basic keys are:
+     *
+     * username   => (string)  Connect to the database as this username.
+     * password   => (string)  Password associated with the username.
+     * host       => (string)  What host to connect to (default 127.0.0.1)
+     * dbname     => (string)  The name of the database to user
+     * protocol   => (string)  Protocol to use, defaults to "TCPIP"
+     * port       => (integer) Port number to use for TCP/IP if protocol is "TCPIP"
+     * persistent => (boolean) Set TRUE to use a persistent connection (db2_pconnect)
+     * os         => (string)  This should be set to 'i5' if the db is on an os400/i5
+     * schema     => (string)  The default schema the connection should use
+     *
+     * @var array
+     */
+    protected $_config = array(
+        'dbname'       => null,
+        'username'     => null,
+        'password'     => null,
+        'host'         => 'localhost',
+        'port'         => '50000',
+        'protocol'     => 'TCPIP',
+        'persistent'   => false,
+        'os'           => null,
+        'schema'       => null
+    );
+
+    /**
+     * Execution mode
+     *
+     * @var int execution flag (DB2_AUTOCOMMIT_ON or DB2_AUTOCOMMIT_OFF)
+     */
+    protected $_execute_mode = DB2_AUTOCOMMIT_ON;
+
+    /**
+     * Default class name for a DB statement.
+     *
+     * @var string
+     */
+    protected $_defaultStmtClass = 'Zend_Db_Statement_Db2';
+    protected $_isI5 = false;
+
+    /**
+     * Keys are UPPERCASE SQL datatypes or the constants
+     * Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
+     *
+     * Values are:
+     * 0 = 32-bit integer
+     * 1 = 64-bit integer
+     * 2 = float or decimal
+     *
+     * @var array Associative array of datatypes to values 0, 1, or 2.
+     */
+    protected $_numericDataTypes = array(
+        Zend_Db::INT_TYPE    => Zend_Db::INT_TYPE,
+        Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
+        Zend_Db::FLOAT_TYPE  => Zend_Db::FLOAT_TYPE,
+        'INTEGER'            => Zend_Db::INT_TYPE,
+        'SMALLINT'           => Zend_Db::INT_TYPE,
+        'BIGINT'             => Zend_Db::BIGINT_TYPE,
+        'DECIMAL'            => Zend_Db::FLOAT_TYPE,
+        'NUMERIC'            => Zend_Db::FLOAT_TYPE
+    );
+
+    /**
+     * Creates a connection resource.
+     *
+     * @return void
+     */
+    protected function _connect()
+    {
+        if (is_resource($this->_connection)) {
+            // connection already exists
+            return;
+        }
+
+        if (!extension_loaded('ibm_db2')) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception('The IBM DB2 extension is required for this adapter but the extension is not loaded');
+        }
+
+        $this->_determineI5();
+        if ($this->_config['persistent']) {
+            // use persistent connection
+            $conn_func_name = 'db2_pconnect';
+        } else {
+            // use "normal" connection
+            $conn_func_name = 'db2_connect';
+        }
+
+        if (!isset($this->_config['driver_options']['autocommit'])) {
+            // set execution mode
+            $this->_config['driver_options']['autocommit'] = &$this->_execute_mode;
+        }
+
+        if (isset($this->_config['options'][Zend_Db::CASE_FOLDING])) {
+            $caseAttrMap = array(
+                Zend_Db::CASE_NATURAL => DB2_CASE_NATURAL,
+                Zend_Db::CASE_UPPER   => DB2_CASE_UPPER,
+                Zend_Db::CASE_LOWER   => DB2_CASE_LOWER
+            );
+            $this->_config['driver_options']['DB2_ATTR_CASE'] = $caseAttrMap[$this->_config['options'][Zend_Db::CASE_FOLDING]];
+        }
+
+        if ($this->_isI5 && isset($this->_config['driver_options']['i5_naming'])) {
+            if ($this->_config['driver_options']['i5_naming']) {
+                $this->_config['driver_options']['i5_naming'] = DB2_I5_NAMING_ON;
+            } else {
+                $this->_config['driver_options']['i5_naming'] = DB2_I5_NAMING_OFF;
+            }
+        }
+
+        if ($this->_config['host'] !== 'localhost' && !$this->_isI5) {
+            // if the host isn't localhost, use extended connection params
+            $dbname = 'DRIVER={IBM DB2 ODBC DRIVER}' .
+                     ';DATABASE=' . $this->_config['dbname'] .
+                     ';HOSTNAME=' . $this->_config['host'] .
+                     ';PORT='     . $this->_config['port'] .
+                     ';PROTOCOL=' . $this->_config['protocol'] .
+                     ';UID='      . $this->_config['username'] .
+                     ';PWD='      . $this->_config['password'] .';';
+            $this->_connection = $conn_func_name(
+                $dbname,
+                null,
+                null,
+                $this->_config['driver_options']
+            );
+        } else {
+            // host is localhost, so use standard connection params
+            $this->_connection = $conn_func_name(
+                $this->_config['dbname'],
+                $this->_config['username'],
+                $this->_config['password'],
+                $this->_config['driver_options']
+            );
+        }
+
+        // check the connection
+        if (!$this->_connection) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception(db2_conn_errormsg(), db2_conn_error());
+        }
+    }
+
+    /**
+     * Test if a connection is active
+     *
+     * @return boolean
+     */
+    public function isConnected()
+    {
+        return ((bool) (is_resource($this->_connection)
+                     && get_resource_type($this->_connection) == 'DB2 Connection'));
+    }
+
+    /**
+     * Force the connection to close.
+     *
+     * @return void
+     */
+    public function closeConnection()
+    {
+        if ($this->isConnected()) {
+            db2_close($this->_connection);
+        }
+        $this->_connection = null;
+    }
+
+    /**
+     * Returns an SQL statement for preparation.
+     *
+     * @param string $sql The SQL statement with placeholders.
+     * @return Zend_Db_Statement_Db2
+     */
+    public function prepare($sql)
+    {
+        $this->_connect();
+        $stmtClass = $this->_defaultStmtClass;
+        if (!class_exists($stmtClass)) {
+            Zend_Loader::loadClass($stmtClass);
+        }
+        $stmt = new $stmtClass($this, $sql);
+        $stmt->setFetchMode($this->_fetchMode);
+        return $stmt;
+    }
+
+    /**
+     * Gets the execution mode
+     *
+     * @return int the execution mode (DB2_AUTOCOMMIT_ON or DB2_AUTOCOMMIT_OFF)
+     */
+    public function _getExecuteMode()
+    {
+        return $this->_execute_mode;
+    }
+
+    /**
+     * @param integer $mode
+     * @return void
+     */
+    public function _setExecuteMode($mode)
+    {
+        switch ($mode) {
+            case DB2_AUTOCOMMIT_OFF:
+            case DB2_AUTOCOMMIT_ON:
+                $this->_execute_mode = $mode;
+                db2_autocommit($this->_connection, $mode);
+                break;
+            default:
+                /**
+                 * @see Zend_Db_Adapter_Db2_Exception
+                 */
+                throw new Zend_Db_Adapter_Db2_Exception("execution mode not supported");
+                break;
+        }
+    }
+
+    /**
+     * Quote a raw string.
+     *
+     * @param string $value     Raw string
+     * @return string           Quoted string
+     */
+    protected function _quote($value)
+    {
+        if (is_int($value) || is_float($value)) {
+            return $value;
+        }
+        /**
+         * Use db2_escape_string() if it is present in the IBM DB2 extension.
+         * But some supported versions of PHP do not include this function,
+         * so fall back to default quoting in the parent class.
+         */
+        if (function_exists('db2_escape_string')) {
+            return "'" . db2_escape_string($value) . "'";
+        }
+        return parent::_quote($value);
+    }
+
+    /**
+     * @return string
+     */
+    public function getQuoteIdentifierSymbol()
+    {
+        $this->_connect();
+        $info = db2_server_info($this->_connection);
+        if ($info) {
+            $identQuote = $info->IDENTIFIER_QUOTE_CHAR;
+        } else {
+            // db2_server_info() does not return result on some i5 OS version
+            if ($this->_isI5) {
+                $identQuote ="'";
+            }
+        }
+        return $identQuote;
+    }
+
+    /**
+     * Returns a list of the tables in the database.
+     * @param string $schema OPTIONAL
+     * @return array
+     */
+    public function listTables($schema = null)
+    {
+        $this->_connect();
+
+        if ($schema === null && $this->_config['schema'] != null) {
+            $schema = $this->_config['schema'];
+        }
+
+        $tables = array();
+
+        if (!$this->_isI5) {
+            if ($schema) {
+                $stmt = db2_tables($this->_connection, null, $schema);
+            } else {
+                $stmt = db2_tables($this->_connection);
+            }
+            while ($row = db2_fetch_assoc($stmt)) {
+                $tables[] = $row['TABLE_NAME'];
+            }
+        } else {
+            $tables = $this->_i5listTables($schema);
+        }
+
+        return $tables;
+    }
+
+
+    /**
+     * Returns the column descriptions for a table.
+     *
+     * The return value is an associative array keyed by the column name,
+     * as returned by the RDBMS.
+     *
+     * The value of each array element is an associative array
+     * with the following keys:
+     *
+     * SCHEMA_NAME      => string; name of database or schema
+     * TABLE_NAME       => string;
+     * COLUMN_NAME      => string; column name
+     * COLUMN_POSITION  => number; ordinal position of column in table
+     * DATA_TYPE        => string; SQL datatype name of column
+     * DEFAULT          => string; default expression of column, null if none
+     * NULLABLE         => boolean; true if column can have nulls
+     * LENGTH           => number; length of CHAR/VARCHAR
+     * SCALE            => number; scale of NUMERIC/DECIMAL
+     * PRECISION        => number; precision of NUMERIC/DECIMAL
+     * UNSIGNED         => boolean; unsigned property of an integer type
+     *                     DB2 not supports UNSIGNED integer.
+     * PRIMARY          => boolean; true if column is part of the primary key
+     * PRIMARY_POSITION => integer; position of column in primary key
+     * IDENTITY         => integer; true if column is auto-generated with unique values
+     *
+     * @param string $tableName
+     * @param string $schemaName OPTIONAL
+     * @return array
+     */
+    public function describeTable($tableName, $schemaName = null)
+    {
+        // Ensure the connection is made so that _isI5 is set
+        $this->_connect();
+
+        if ($schemaName === null && $this->_config['schema'] != null) {
+            $schemaName = $this->_config['schema'];
+        }
+
+        if (!$this->_isI5) {
+
+            $sql = "SELECT DISTINCT c.tabschema, c.tabname, c.colname, c.colno,
+                c.typename, c.default, c.nulls, c.length, c.scale,
+                c.identity, tc.type AS tabconsttype, k.colseq
+                FROM syscat.columns c
+                LEFT JOIN (syscat.keycoluse k JOIN syscat.tabconst tc
+                ON (k.tabschema = tc.tabschema
+                    AND k.tabname = tc.tabname
+                    AND tc.type = 'P'))
+                ON (c.tabschema = k.tabschema
+                    AND c.tabname = k.tabname
+                    AND c.colname = k.colname)
+                WHERE "
+                . $this->quoteInto('UPPER(c.tabname) = UPPER(?)', $tableName);
+
+            if ($schemaName) {
+               $sql .= $this->quoteInto(' AND UPPER(c.tabschema) = UPPER(?)', $schemaName);
+            }
+
+            $sql .= " ORDER BY c.colno";
+
+        } else {
+
+            // DB2 On I5 specific query
+            $sql = "SELECT DISTINCT C.TABLE_SCHEMA, C.TABLE_NAME, C.COLUMN_NAME, C.ORDINAL_POSITION,
+                C.DATA_TYPE, C.COLUMN_DEFAULT, C.NULLS ,C.LENGTH, C.SCALE, LEFT(C.IDENTITY,1),
+                LEFT(tc.TYPE, 1) AS tabconsttype, k.COLSEQ
+                FROM QSYS2.SYSCOLUMNS C
+                LEFT JOIN (QSYS2.syskeycst k JOIN QSYS2.SYSCST tc
+                    ON (k.TABLE_SCHEMA = tc.TABLE_SCHEMA
+                      AND k.TABLE_NAME = tc.TABLE_NAME
+                      AND LEFT(tc.type,1) = 'P'))
+                    ON (C.TABLE_SCHEMA = k.TABLE_SCHEMA
+                       AND C.TABLE_NAME = k.TABLE_NAME
+                       AND C.COLUMN_NAME = k.COLUMN_NAME)
+                WHERE "
+                . $this->quoteInto('UPPER(C.TABLE_NAME) = UPPER(?)', $tableName);
+
+            if ($schemaName) {
+                $sql .= $this->quoteInto(' AND UPPER(C.TABLE_SCHEMA) = UPPER(?)', $schemaName);
+            }
+
+            $sql .= " ORDER BY C.ORDINAL_POSITION FOR FETCH ONLY";
+        }
+
+        $desc = array();
+        $stmt = $this->query($sql);
+
+        /**
+         * To avoid case issues, fetch using FETCH_NUM
+         */
+        $result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
+
+        /**
+         * The ordering of columns is defined by the query so we can map
+         * to variables to improve readability
+         */
+        $tabschema      = 0;
+        $tabname        = 1;
+        $colname        = 2;
+        $colno          = 3;
+        $typename       = 4;
+        $default        = 5;
+        $nulls          = 6;
+        $length         = 7;
+        $scale          = 8;
+        $identityCol    = 9;
+        $tabconstType   = 10;
+        $colseq         = 11;
+
+        foreach ($result as $key => $row) {
+            list ($primary, $primaryPosition, $identity) = array(false, null, false);
+            if ($row[$tabconstType] == 'P') {
+                $primary = true;
+                $primaryPosition = $row[$colseq];
+            }
+            /**
+             * In IBM DB2, an column can be IDENTITY
+             * even if it is not part of the PRIMARY KEY.
+             */
+            if ($row[$identityCol] == 'Y') {
+                $identity = true;
+            }
+
+            // only colname needs to be case adjusted
+            $desc[$this->foldCase($row[$colname])] = array(
+                'SCHEMA_NAME'      => $this->foldCase($row[$tabschema]),
+                'TABLE_NAME'       => $this->foldCase($row[$tabname]),
+                'COLUMN_NAME'      => $this->foldCase($row[$colname]),
+                'COLUMN_POSITION'  => (!$this->_isI5) ? $row[$colno]+1 : $row[$colno],
+                'DATA_TYPE'        => $row[$typename],
+                'DEFAULT'          => $row[$default],
+                'NULLABLE'         => (bool) ($row[$nulls] == 'Y'),
+                'LENGTH'           => $row[$length],
+                'SCALE'            => $row[$scale],
+                'PRECISION'        => ($row[$typename] == 'DECIMAL' ? $row[$length] : 0),
+                'UNSIGNED'         => false,
+                'PRIMARY'          => $primary,
+                'PRIMARY_POSITION' => $primaryPosition,
+                'IDENTITY'         => $identity
+            );
+        }
+
+        return $desc;
+    }
+
+    /**
+     * Return the most recent value from the specified sequence in the database.
+     * This is supported only on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2).  Other RDBMS brands return null.
+     *
+     * @param string $sequenceName
+     * @return string
+     */
+    public function lastSequenceId($sequenceName)
+    {
+        $this->_connect();
+
+        if (!$this->_isI5) {
+            $quotedSequenceName = $this->quoteIdentifier($sequenceName, true);
+            $sql = 'SELECT PREVVAL FOR ' . $quotedSequenceName . ' AS VAL FROM SYSIBM.SYSDUMMY1';
+        } else {
+            $quotedSequenceName = $sequenceName;
+            $sql = 'SELECT PREVVAL FOR ' . $this->quoteIdentifier($sequenceName, true) . ' AS VAL FROM QSYS2.QSQPTABL';
+        }
+
+        $value = $this->fetchOne($sql);
+        return (string) $value;
+    }
+
+    /**
+     * Generate a new value from the specified sequence in the database, and return it.
+     * This is supported only on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2).  Other RDBMS brands return null.
+     *
+     * @param string $sequenceName
+     * @return string
+     */
+    public function nextSequenceId($sequenceName)
+    {
+        $this->_connect();
+        $sql = 'SELECT NEXTVAL FOR '.$this->quoteIdentifier($sequenceName, true).' AS VAL FROM SYSIBM.SYSDUMMY1';
+        $value = $this->fetchOne($sql);
+        return (string) $value;
+    }
+
+    /**
+     * Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
+     *
+     * As a convention, on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
+     * from the arguments and returns the last id generated by that sequence.
+     * On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
+     * returns the last value generated for such a column, and the table name
+     * argument is disregarded.
+     *
+     * The IDENTITY_VAL_LOCAL() function gives the last generated identity value
+     * in the current process, even if it was for a GENERATED column.
+     *
+     * @param string $tableName OPTIONAL
+     * @param string $primaryKey OPTIONAL
+     * @param string $idType OPTIONAL used for i5 platform to define sequence/idenity unique value
+     * @return string
+     */
+
+    public function lastInsertId($tableName = null, $primaryKey = null, $idType = null)
+    {
+        $this->_connect();
+
+        if ($this->_isI5) {
+            return (string) $this->_i5LastInsertId($tableName, $idType);
+        }
+
+        if ($tableName !== null) {
+            $sequenceName = $tableName;
+            if ($primaryKey) {
+                $sequenceName .= "_$primaryKey";
+            }
+            $sequenceName .= '_seq';
+            return $this->lastSequenceId($sequenceName);
+        }
+
+        $sql = 'SELECT IDENTITY_VAL_LOCAL() AS VAL FROM SYSIBM.SYSDUMMY1';
+        $value = $this->fetchOne($sql);
+        return (string) $value;
+    }
+
+    /**
+     * Begin a transaction.
+     *
+     * @return void
+     */
+    protected function _beginTransaction()
+    {
+        $this->_setExecuteMode(DB2_AUTOCOMMIT_OFF);
+    }
+
+    /**
+     * Commit a transaction.
+     *
+     * @return void
+     */
+    protected function _commit()
+    {
+        if (!db2_commit($this->_connection)) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception(
+                db2_conn_errormsg($this->_connection),
+                db2_conn_error($this->_connection));
+        }
+
+        $this->_setExecuteMode(DB2_AUTOCOMMIT_ON);
+    }
+
+    /**
+     * Rollback a transaction.
+     *
+     * @return void
+     */
+    protected function _rollBack()
+    {
+        if (!db2_rollback($this->_connection)) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception(
+                db2_conn_errormsg($this->_connection),
+                db2_conn_error($this->_connection));
+        }
+        $this->_setExecuteMode(DB2_AUTOCOMMIT_ON);
+    }
+
+    /**
+     * Set the fetch mode.
+     *
+     * @param integer $mode
+     * @return void
+     * @throws Zend_Db_Adapter_Db2_Exception
+     */
+    public function setFetchMode($mode)
+    {
+        switch ($mode) {
+            case Zend_Db::FETCH_NUM:   // seq array
+            case Zend_Db::FETCH_ASSOC: // assoc array
+            case Zend_Db::FETCH_BOTH:  // seq+assoc array
+            case Zend_Db::FETCH_OBJ:   // object
+                $this->_fetchMode = $mode;
+                break;
+            case Zend_Db::FETCH_BOUND:   // bound to PHP variable
+                /**
+                 * @see Zend_Db_Adapter_Db2_Exception
+                 */
+                throw new Zend_Db_Adapter_Db2_Exception('FETCH_BOUND is not supported yet');
+                break;
+            default:
+                /**
+                 * @see Zend_Db_Adapter_Db2_Exception
+                 */
+                throw new Zend_Db_Adapter_Db2_Exception("Invalid fetch mode '$mode' specified");
+                break;
+        }
+    }
+
+    /**
+     * Adds an adapter-specific LIMIT clause to the SELECT statement.
+     *
+     * @param string $sql
+     * @param integer $count
+     * @param integer $offset OPTIONAL
+     * @return string
+     */
+    public function limit($sql, $count, $offset = 0)
+    {
+        $count = intval($count);
+        if ($count <= 0) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception("LIMIT argument count=$count is not valid");
+        }
+
+        $offset = intval($offset);
+        if ($offset < 0) {
+            /**
+             * @see Zend_Db_Adapter_Db2_Exception
+             */
+            throw new Zend_Db_Adapter_Db2_Exception("LIMIT argument offset=$offset is not valid");
+        }
+
+        if ($offset == 0) {
+            $limit_sql = $sql . " FETCH FIRST $count ROWS ONLY";
+            return $limit_sql;
+        }
+
+        /**
+         * DB2 does not implement the LIMIT clause as some RDBMS do.
+         * We have to simulate it with subqueries and ROWNUM.
+         * Unfortunately because we use the column wildcard "*",
+         * this puts an extra column into the query result set.
+         */
+        $limit_sql = "SELECT z2.*
+            FROM (
+                SELECT ROW_NUMBER() OVER() AS \"ZEND_DB_ROWNUM\", z1.*
+                FROM (
+                    " . $sql . "
+                ) z1
+            ) z2
+            WHERE z2.zend_db_rownum BETWEEN " . ($offset+1) . " AND " . ($offset+$count);
+        return $limit_sql;
+    }
+
+    /**
+     * Check if the adapter supports real SQL parameters.
+     *
+     * @param string $type 'positional' or 'named'
+     * @return bool
+     */
+    public function supportsParameters($type)
+    {
+        if ($type == 'positional') {
+            return true;
+        }
+
+        // if its 'named' or anything else
+        return false;
+    }
+
+    /**
+     * Retrieve server version in PHP style
+     *
+     * @return string
+     */
+    public function getServerVersion()
+    {
+        $this->_connect();
+        $server_info = db2_server_info($this->_connection);
+        if ($server_info !== false) {
+            $version = $server_info->DBMS_VER;
+            if ($this->_isI5) {
+                $version = (int) substr($version, 0, 2) . '.' . (int) substr($version, 2, 2) . '.' . (int) substr($version, 4);
+            }
+            return $version;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Return whether or not this is running on i5
+     *
+     * @return bool
+     */
+    public function isI5()
+    {
+        if ($this->_isI5 === null) {
+            $this->_determineI5();
+        }
+
+        return (bool) $this->_isI5;
+    }
+
+    /**
+     * Check the connection parameters according to verify
+     * type of used OS
+     *
+     *  @return void
+     */
+    protected function _determineI5()
+    {
+        // first us the compiled flag.
+        $this->_isI5 = (php_uname('s') == 'OS400') ? true : false;
+
+        // if this is set, then us it
+        if (isset($this->_config['os'])){
+            if (strtolower($this->_config['os']) === 'i5') {
+                $this->_isI5 = true;
+            } else {
+                // any other value passed in, its null
+                $this->_isI5 = false;
+            }
+        }
+
+    }
+
+    /**
+     * Db2 On I5 specific method
+     *
+     * Returns a list of the tables in the database .
+     * Used only for DB2/400.
+     *
+     * @return array
+     */
+    protected function _i5listTables($schema = null)
+    {
+        //list of i5 libraries.
+        $tables = array();
+        if ($schema) {
+            $tablesStatement = db2_tables($this->_connection, null, $schema);
+            while ($rowTables = db2_fetch_assoc($tablesStatement) ) {
+                if ($rowTables['TABLE_NAME'] !== null) {
+                    $tables[] = $rowTables['TABLE_NAME'];
+                }
+            }
+        } else {
+            $schemaStatement = db2_tables($this->_connection);
+            while ($schema = db2_fetch_assoc($schemaStatement)) {
+                if ($schema['TABLE_SCHEM'] !== null) {
+                    // list of the tables which belongs to the selected library
+                    $tablesStatement = db2_tables($this->_connection, NULL, $schema['TABLE_SCHEM']);
+                    if (is_resource($tablesStatement)) {
+                        while ($rowTables = db2_fetch_assoc($tablesStatement) ) {
+                            if ($rowTables['TABLE_NAME'] !== null) {
+                                $tables[] = $rowTables['TABLE_NAME'];
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        return $tables;
+    }
+
+    protected function _i5LastInsertId($objectName = null, $idType = null)
+    {
+
+        if ($objectName === null) {
+            $sql = 'SELECT IDENTITY_VAL_LOCAL() AS VAL FROM QSYS2.QSQPTABL';
+            $value = $this->fetchOne($sql);
+            return $value;
+        }
+
+        if (strtoupper($idType) === 'S'){
+            //check i5_lib option
+            $sequenceName = $objectName;
+            return $this->lastSequenceId($sequenceName);
+        }
+
+            //returns last identity value for the specified table
+        //if (strtoupper($idType) === 'I') {
+        $tableName = $objectName;
+        return $this->fetchOne('SELECT IDENTITY_VAL_LOCAL() from ' . $this->quoteIdentifier($tableName));
+    }
+
+}
+
+