833 lines
27 KiB
PHP
833 lines
27 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Db2.php 16541 2009-07-07 06:59:03Z bkarwin $
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*
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*/
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/**
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* @see Zend_Db
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*/
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require_once 'Zend/Db.php';
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/**
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* @see Zend_Db_Adapter_Abstract
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*/
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require_once 'Zend/Db/Adapter/Abstract.php';
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/**
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* @see Zend_Db_Statement_Db2
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*/
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require_once 'Zend/Db/Statement/Db2.php';
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/**
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* @package Zend_Db
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* @copyright Copyright (c) 2005-2009 Zend Technologies Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Db_Adapter_Db2 extends Zend_Db_Adapter_Abstract
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{
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/**
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* User-provided configuration.
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*
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* Basic keys are:
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*
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* username => (string) Connect to the database as this username.
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* password => (string) Password associated with the username.
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* host => (string) What host to connect to (default 127.0.0.1)
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* dbname => (string) The name of the database to user
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* protocol => (string) Protocol to use, defaults to "TCPIP"
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* port => (integer) Port number to use for TCP/IP if protocol is "TCPIP"
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* persistent => (boolean) Set TRUE to use a persistent connection (db2_pconnect)
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* os => (string) This should be set to 'i5' if the db is on an os400/i5
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* schema => (string) The default schema the connection should use
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*
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* @var array
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*/
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protected $_config = array(
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'dbname' => null,
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'username' => null,
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'password' => null,
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'host' => 'localhost',
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'port' => '50000',
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'protocol' => 'TCPIP',
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'persistent' => false,
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'os' => null,
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'schema' => null
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);
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/**
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* Execution mode
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*
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* @var int execution flag (DB2_AUTOCOMMIT_ON or DB2_AUTOCOMMIT_OFF)
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*/
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protected $_execute_mode = DB2_AUTOCOMMIT_ON;
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/**
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* Default class name for a DB statement.
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*
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* @var string
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*/
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protected $_defaultStmtClass = 'Zend_Db_Statement_Db2';
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protected $_isI5 = false;
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/**
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* Keys are UPPERCASE SQL datatypes or the constants
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* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
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*
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* Values are:
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* 0 = 32-bit integer
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* 1 = 64-bit integer
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* 2 = float or decimal
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*
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* @var array Associative array of datatypes to values 0, 1, or 2.
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*/
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protected $_numericDataTypes = array(
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Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
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Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
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Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
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'INTEGER' => Zend_Db::INT_TYPE,
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'SMALLINT' => Zend_Db::INT_TYPE,
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'BIGINT' => Zend_Db::BIGINT_TYPE,
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'DECIMAL' => Zend_Db::FLOAT_TYPE,
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'NUMERIC' => Zend_Db::FLOAT_TYPE
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);
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/**
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* Creates a connection resource.
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*
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* @return void
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*/
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protected function _connect()
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{
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if (is_resource($this->_connection)) {
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// connection already exists
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return;
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}
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if (!extension_loaded('ibm_db2')) {
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/**
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* @see Zend_Db_Adapter_Db2_Exception
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*/
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require_once 'Zend/Db/Adapter/Db2/Exception.php';
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throw new Zend_Db_Adapter_Db2_Exception('The IBM DB2 extension is required for this adapter but the extension is not loaded');
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}
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$this->_determineI5();
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if ($this->_config['persistent']) {
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// use persistent connection
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$conn_func_name = 'db2_pconnect';
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} else {
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// use "normal" connection
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$conn_func_name = 'db2_connect';
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}
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if (!isset($this->_config['driver_options']['autocommit'])) {
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// set execution mode
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$this->_config['driver_options']['autocommit'] = &$this->_execute_mode;
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}
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if (isset($this->_config['options'][Zend_Db::CASE_FOLDING])) {
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$caseAttrMap = array(
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Zend_Db::CASE_NATURAL => DB2_CASE_NATURAL,
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Zend_Db::CASE_UPPER => DB2_CASE_UPPER,
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Zend_Db::CASE_LOWER => DB2_CASE_LOWER
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);
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$this->_config['driver_options']['DB2_ATTR_CASE'] = $caseAttrMap[$this->_config['options'][Zend_Db::CASE_FOLDING]];
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}
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if ($this->_config['host'] !== 'localhost' && !$this->_isI5) {
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// if the host isn't localhost, use extended connection params
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$dbname = 'DRIVER={IBM DB2 ODBC DRIVER}' .
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';DATABASE=' . $this->_config['dbname'] .
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';HOSTNAME=' . $this->_config['host'] .
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';PORT=' . $this->_config['port'] .
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';PROTOCOL=' . $this->_config['protocol'] .
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';UID=' . $this->_config['username'] .
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';PWD=' . $this->_config['password'] .';';
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$this->_connection = $conn_func_name(
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$dbname,
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null,
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null,
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$this->_config['driver_options']
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);
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} else {
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// host is localhost, so use standard connection params
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$this->_connection = $conn_func_name(
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$this->_config['dbname'],
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$this->_config['username'],
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$this->_config['password'],
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$this->_config['driver_options']
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);
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}
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// check the connection
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if (!$this->_connection) {
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/**
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* @see Zend_Db_Adapter_Db2_Exception
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*/
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require_once 'Zend/Db/Adapter/Db2/Exception.php';
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throw new Zend_Db_Adapter_Db2_Exception(db2_conn_errormsg(), db2_conn_error());
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}
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}
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/**
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* Test if a connection is active
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*
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* @return boolean
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*/
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public function isConnected()
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{
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return ((bool) (is_resource($this->_connection)
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&& get_resource_type($this->_connection) == 'DB2 Connection'));
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}
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/**
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* Force the connection to close.
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*
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* @return void
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*/
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public function closeConnection()
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{
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if ($this->isConnected()) {
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db2_close($this->_connection);
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}
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$this->_connection = null;
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}
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/**
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* Returns an SQL statement for preparation.
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*
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* @param string $sql The SQL statement with placeholders.
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* @return Zend_Db_Statement_Db2
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*/
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public function prepare($sql)
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{
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$this->_connect();
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$stmtClass = $this->_defaultStmtClass;
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if (!class_exists($stmtClass)) {
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require_once 'Zend/Loader.php';
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Zend_Loader::loadClass($stmtClass);
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}
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$stmt = new $stmtClass($this, $sql);
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$stmt->setFetchMode($this->_fetchMode);
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return $stmt;
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}
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/**
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* Gets the execution mode
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*
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* @return int the execution mode (DB2_AUTOCOMMIT_ON or DB2_AUTOCOMMIT_OFF)
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*/
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public function _getExecuteMode()
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{
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return $this->_execute_mode;
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}
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/**
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* @param integer $mode
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* @return void
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*/
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public function _setExecuteMode($mode)
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{
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switch ($mode) {
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case DB2_AUTOCOMMIT_OFF:
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case DB2_AUTOCOMMIT_ON:
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$this->_execute_mode = $mode;
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db2_autocommit($this->_connection, $mode);
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break;
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default:
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/**
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* @see Zend_Db_Adapter_Db2_Exception
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*/
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require_once 'Zend/Db/Adapter/Db2/Exception.php';
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throw new Zend_Db_Adapter_Db2_Exception("execution mode not supported");
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break;
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}
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}
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/**
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* Quote a raw string.
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*
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* @param string $value Raw string
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* @return string Quoted string
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*/
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protected function _quote($value)
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{
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if (is_int($value) || is_float($value)) {
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return $value;
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}
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/**
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* Use db2_escape_string() if it is present in the IBM DB2 extension.
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* But some supported versions of PHP do not include this function,
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* so fall back to default quoting in the parent class.
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*/
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if (function_exists('db2_escape_string')) {
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return "'" . db2_escape_string($value) . "'";
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}
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return parent::_quote($value);
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}
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/**
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* @return string
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*/
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public function getQuoteIdentifierSymbol()
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{
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$this->_connect();
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$info = db2_server_info($this->_connection);
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if ($info) {
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$identQuote = $info->IDENTIFIER_QUOTE_CHAR;
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} else {
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// db2_server_info() does not return result on some i5 OS version
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if ($this->_isI5) {
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$identQuote ="'";
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}
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}
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return $identQuote;
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}
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/**
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* Returns a list of the tables in the database.
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* @param string $schema OPTIONAL
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* @return array
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*/
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public function listTables($schema = null)
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{
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$this->_connect();
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if ($schema === null && $this->_config['schema'] != null) {
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$schema = $this->_config['schema'];
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}
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$tables = array();
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if (!$this->_isI5) {
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if ($schema) {
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$stmt = db2_tables($this->_connection, null, $schema);
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} else {
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$stmt = db2_tables($this->_connection);
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}
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while ($row = db2_fetch_assoc($stmt)) {
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$tables[] = $row['TABLE_NAME'];
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}
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} else {
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$tables = $this->_i5listTables($schema);
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}
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return $tables;
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}
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/**
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* Returns the column descriptions for a table.
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*
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* The return value is an associative array keyed by the column name,
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* as returned by the RDBMS.
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*
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* The value of each array element is an associative array
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* with the following keys:
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*
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* SCHEMA_NAME => string; name of database or schema
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* TABLE_NAME => string;
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* COLUMN_NAME => string; column name
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* COLUMN_POSITION => number; ordinal position of column in table
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* DATA_TYPE => string; SQL datatype name of column
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* DEFAULT => string; default expression of column, null if none
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* NULLABLE => boolean; true if column can have nulls
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* LENGTH => number; length of CHAR/VARCHAR
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* SCALE => number; scale of NUMERIC/DECIMAL
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* PRECISION => number; precision of NUMERIC/DECIMAL
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* UNSIGNED => boolean; unsigned property of an integer type
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* DB2 not supports UNSIGNED integer.
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* PRIMARY => boolean; true if column is part of the primary key
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* PRIMARY_POSITION => integer; position of column in primary key
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* IDENTITY => integer; true if column is auto-generated with unique values
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*
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* @param string $tableName
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* @param string $schemaName OPTIONAL
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* @return array
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*/
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public function describeTable($tableName, $schemaName = null)
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{
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// Ensure the connection is made so that _isI5 is set
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$this->_connect();
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if ($schemaName === null && $this->_config['schema'] != null) {
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$schemaName = $this->_config['schema'];
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}
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|
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||
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if (!$this->_isI5) {
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||
|
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||
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$sql = "SELECT DISTINCT c.tabschema, c.tabname, c.colname, c.colno,
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|
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c.typename, c.default, c.nulls, c.length, c.scale,
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||
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c.identity, tc.type AS tabconsttype, k.colseq
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FROM syscat.columns c
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LEFT JOIN (syscat.keycoluse k JOIN syscat.tabconst tc
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||
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ON (k.tabschema = tc.tabschema
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||
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AND k.tabname = tc.tabname
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||
|
|
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
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
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
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
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 = $mode;
|
||
|
|
break;
|
||
|
|
case Zend_Db::FETCH_BOUND: // bound to PHP variable
|
||
|
|
/**
|
||
|
|
* @see Zend_Db_Adapter_Db2_Exception
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
throw new Zend_Db_Adapter_Db2_Exception('FETCH_BOUND is not supported yet');
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
/**
|
||
|
|
* @see Zend_Db_Adapter_Db2_Exception
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
throw new Zend_Db_Adapter_Db2_Exception("Invalid fetch mode '$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 ($count <= 0) {
|
||
|
|
/**
|
||
|
|
* @see Zend_Db_Adapter_Db2_Exception
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
throw new Zend_Db_Adapter_Db2_Exception("LIMIT argument count=$count is not valid");
|
||
|
|
}
|
||
|
|
|
||
|
|
$offset = intval($offset);
|
||
|
|
if ($offset < 0) {
|
||
|
|
/**
|
||
|
|
* @see Zend_Db_Adapter_Db2_Exception
|
||
|
|
*/
|
||
|
|
require_once 'Zend/Db/Adapter/Db2/Exception.php';
|
||
|
|
throw new Zend_Db_Adapter_Db2_Exception("LIMIT argument offset=$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));
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|