mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
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df75a06756
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@7222 3807eeeb-6ff5-0310-8944-8be069107fe0
571 lines
No EOL
15 KiB
PHP
571 lines
No EOL
15 KiB
PHP
<?php
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/* SVN FILE: $Id$ */
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/**
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* IBM DB2 for DBO
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*
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* This file supports IBM DB2 and Cloudscape (aka Apache Derby,
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* Sun Java DB) using the native ibm_db2 extension:
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* http://pecl.php.net/package/ibm_db2
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2007, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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* @since CakePHP(tm) v 0.10.5.1790
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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/**
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* IBM DB2 for DBO
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*
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* This file supports IBM DB2 and Cloudscape (aka Apache Derby,
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* Sun Java DB) using the native ibm_db2 extension:
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* http://pecl.php.net/package/ibm_db2
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*
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* @package cake
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* @subpackage cake.cake.libs.model.datasources.dbo
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*/
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class DboDb2 extends DboSource {
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/**
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* A short description of the type of driver.
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*
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* @var string
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*/
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var $description = 'IBM DB2 DBO Driver';
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/**
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* The start quote in which database column and table names should be wrapped.
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*
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* @var string
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*/
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var $startQuote = '';
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/**
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* The end quote in which database column and table names should be wrapped.
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*
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* @var string
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*/
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var $endQuote = '';
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/**
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* An array of base configuration settings to be used if settings are not
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* provided, i.e. default host, port, and connection method.
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*
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* @var array
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*/
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var $_baseConfig = array(
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'persistent' => true,
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'login' => 'db2inst1',
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'password' => '',
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'database' => 'cake',
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'schema' => '',
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'hostname' => '127.0.0.1',
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'port' => '50001',
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'encoding' => 'UTF-8',
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'cataloged' => true,
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'autocommit' => true
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);
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/**
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* An array that maps Cake column types to database native column types.
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* The mapped information can include a reference to a function that should
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* be used to format the data, as well as a string that defines the
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* formatting according to that function.
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*
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* @var array
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*/
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var $columns = array(
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'primary_key' => array('name' => 'not null generated by default as identity (start with 1, increment by 1)'),
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'string' => array('name' => 'varchar', 'limit' => '255'),
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'text' => array('name' => 'clob'),
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'integer' => array('name' => 'integer', 'limit' => '10', 'formatter' => 'intval'),
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'float' => array('name' => 'double', 'formatter' => 'floatval'),
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'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d-H.i.s', 'formatter' => 'date'),
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'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d-H.i.s', 'formatter' => 'date'),
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'time' => array('name' => 'time', 'format' => 'H.i.s', 'formatter' => 'date'),
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'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
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'binary' => array('name' => 'blob'),
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'boolean' => array('name' => 'smallint', 'limit' => '1')
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);
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/**
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* A map for every result mapping tables to columns
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*
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* @var array result -> ( table -> column )
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*/
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var $_resultMap = array();
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/**
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* Connects to the database using options in the given configuration array.
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*
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* @return boolean True if the database could be connected, else false
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*/
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function connect() {
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$config = $this->config;
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$connect = 'db2_connect';
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if ($config['persistent']) {
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$connect = 'db2_pconnect';
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}
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$this->connected = false;
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if ($config['cataloged']) {
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$this->connection = $connect($config['database'], $config['login'], $config['password']);
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} else {
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$conn_string = sprintf(
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"DRIVER={IBM DB2 ODBC DRIVER};DATABASE=%s;HOSTNAME=%s;PORT=%d;PROTOCOL=TCPIP;UID=%s;PWD=%s;",
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$config['database'],
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$config['hostname'],
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$config['port'],
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$config['login'],
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$config['password']
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);
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$this->connection = db2_connect($conn_string, '', '');
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}
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if ($this->connection) {
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$this->connected = true;
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}
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if ($config['schema'] !== '') {
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$this->_execute('SET CURRENT SCHEMA = ' . $config['schema']);
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}
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return $this->connected;
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}
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/**
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* Disconnects from database.
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*
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* @return boolean True if the database could be disconnected, else false
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*/
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function disconnect() {
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@db2_free_result($this->results);
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$this->connected = !@db2_close($this->connection);
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return !$this->connected;
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}
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/**
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* Executes given SQL statement. We should use prepare / execute to allow the
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* database server to reuse its access plan and increase the efficiency
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* of your database access
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*
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* @param string $sql SQL statement
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* @return resource Result resource identifier
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* @access protected
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*/
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function _execute($sql) {
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// get result from db
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$result = db2_exec($this->connection, $sql);
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if(!is_bool($result)){
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// build table/column map for this result
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$map = array();
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$num_fields = db2_num_fields($result);
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$index = 0;
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$j = 0;
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$offset = 0;
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while ($j < $num_fields) {
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$columnName = strtolower(db2_field_name($result, $j));
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$tmp = strpos($sql, '.' . $columnName, $offset);
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$tableName = substr($sql, $offset, ($tmp-$offset));
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$tableName = substr($tableName, strrpos($tableName, ' ') + 1);
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$map[$index++] = array($tableName, $columnName);
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$j++;
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$offset = strpos($sql, ' ', $tmp);
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}
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$this->_resultMap[$result] = $map;
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}
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return $result;
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}
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/**
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* Returns an array of all the tables in the database.
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* Should call parent::listSources twice in the method:
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* once to see if the list is cached, and once to cache
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* the list if not.
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*
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* @return array Array of tablenames in the database
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*/
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function listSources() {
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$cache = parent::listSources();
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if ($cache != null) {
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return $cache;
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}
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$result = db2_tables($this->connection);
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$tables = array();
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while (db2_fetch_row($result)) {
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$tables[] = strtolower(db2_result($result, 'TABLE_NAME'));
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}
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parent::listSources($tables);
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return $tables;
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}
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/**
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* Returns an array of the fields in given table name.
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*
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* @param Model $model Model object to describe
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* @return array Fields in table. Keys are name and type
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*/
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function &describe(&$model) {
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$cache = parent::describe($model);
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if ($cache != null) {
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return $cache;
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}
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$fields = array();
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$result = db2_columns($this->connection, '', '', strtoupper($this->fullTableName($model)));
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while (db2_fetch_row($result)) {
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$fields[strtolower(db2_result($result, 'COLUMN_NAME'))] = array(
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'type' => $this->column(strtolower(db2_result($result, 'TYPE_NAME'))),
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'null' => db2_result($result, 'NULLABLE'),
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'default' => db2_result($result, 'COLUMN_DEF'),
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'length' => db2_result($result, 'COLUMN_SIZE')
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);
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}
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$this->__cacheDescription($model->tablePrefix . $model->table, $fields);
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return $fields;
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}
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/**
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* Returns a quoted name of $data for use in an SQL statement.
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*
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* @param string $data Name (table.field) to be prepared for use in an SQL statement
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* @return string Quoted for MySQL
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*/
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function name($data) {
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return $data;
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}
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/**
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* Returns a quoted and escaped string of $data for use in an SQL statement.
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*
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* @param string $data String to be prepared for use in an SQL statement
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* @param string $column The column into which this data will be inserted
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* @return string Quoted and escaped
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* @todo Add logic that formats/escapes data based on column type
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*/
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function value($data, $column = null, $safe = false) {
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$parent = parent::value($data, $column, $safe);
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if ($parent != null) {
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return $parent;
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}
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if ($data === null) {
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return 'NULL';
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}
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if ($data === '') {
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return "''";
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}
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switch ($column) {
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case 'boolean':
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$data = $this->boolean((bool)$data);
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break;
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case 'integer':
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$data = intval($data);
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break;
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default:
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$data = str_replace("'", "''", $data);
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break;
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}
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// TODO: Make sure this isn't catching other numeric values
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// that are going into string columns.
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if ($column == 'integer' || is_numeric($data)) {
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return $data;
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} else {
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return "'" . $data . "'";
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}
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}
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/**
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* Not sure about this one, MySQL needs it but does ODBC? Safer just to leave it
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* Translates between PHP boolean values and MySQL (faked) boolean values
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*
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* @param mixed $data Value to be translated
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* @return mixed Converted boolean value
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*/
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function boolean($data) {
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if ($data === true || $data === false) {
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if ($data === true) {
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return 1;
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}
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return 0;
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} else {
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if (intval($data !== 0)) {
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return true;
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}
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return false;
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}
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}
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/**
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* Begins a transaction. Returns true if the transaction was
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* started successfully, otherwise false.
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions).
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*/
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function begin(&$model) {
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if (parent::begin($model)) {
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if (db2_autocommit($this->connection, DB2_AUTOCOMMIT_OFF)) {
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$this->_transactionStarted = true;
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return true;
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}
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}
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return false;
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}
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/**
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* Commit a transaction
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions,
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* or a transaction has not started).
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*/
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function commit(&$model) {
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if (parent::commit($model)) {
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if (db2_commit($this->connection)) {
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$this->_transactionStarted = false;
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db2_autocommit($this->connection, DB2_AUTOCOMMIT_ON);
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return true;
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}
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}
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return false;
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}
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/**
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* Rollback a transaction
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*
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* @param unknown_type $model
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* @return boolean True on success, false on fail
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* (i.e. if the database/model does not support transactions,
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* or a transaction has not started).
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*/
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function rollback(&$model) {
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if (parent::rollback($model)) {
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$this->_transactionStarted = false;
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db2_autocommit($this->connection, DB2_AUTOCOMMIT_ON);
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return db2_rollback($this->connection);
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}
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return false;
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}
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/**
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* Removes Identity (primary key) column from update data before returning to parent
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*
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* @param Model $model
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* @param array $fields
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* @param array $values
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* @return array
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*/
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function update(&$model, $fields = array(), $values = array()) {
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foreach ($fields as $i => $field) {
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if ($field == $model->primaryKey) {
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unset ($fields[$i]);
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unset ($values[$i]);
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break;
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}
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}
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return parent::update($model, $fields, $values);
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}
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/**
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* Returns a formatted error message from previous database operation.
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* DB2 distinguishes between statement and connnection errors so we
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* must check for both.
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*
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* @return string Error message with error number
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*/
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function lastError() {
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if (db2_stmt_error()) {
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return db2_stmt_error() . ': ' . db2_stmt_errormsg();
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} elseif (db2_conn_error()) {
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return db2_conn_error() . ': ' . db2_conn_errormsg();
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}
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return null;
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}
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/**
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* Returns number of affected rows in previous database operation. If no previous operation exists,
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* this returns false.
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*
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* @return integer Number of affected rows
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*/
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function lastAffected() {
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if ($this->_result) {
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return db2_num_rows($this->_result);
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}
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return null;
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}
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/**
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* Returns number of rows in previous resultset. If no previous resultset exists,
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* this returns false.
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*
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* @return integer Number of rows in resultset
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*/
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function lastNumRows() {
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if ($this->_result) {
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return db2_num_rows($this->_result);
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}
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return null;
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}
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/**
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* Returns the ID generated from the previous INSERT operation.
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*
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* @param unknown_type $source
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* @return in
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*/
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function lastInsertId($source = null) {
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$data = $this->fetchRow(sprintf('SELECT SYSIBM.IDENTITY_VAL_LOCAL() AS ID FROM %s FETCH FIRST ROW ONLY', $source));
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if ($data && isset($data[0]['id'])) {
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return $data[0]['id'];
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}
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return null;
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}
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/**
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* Returns a limit statement in the correct format for the particular database.
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*
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* @param integer $limit Limit of results returned
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* @param integer $offset Offset from which to start results
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* @return string SQL limit/offset statement
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*/
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function limit($limit, $offset = null) {
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if ($limit) {
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$rt = '';
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// If limit is not in the passed value already, add a limit clause.
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if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
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$rt = sprintf('FETCH FIRST %d ROWS ONLY', $limit);
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}
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// TODO: Implement paging with the offset. This could get hairy.
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/*
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WITH WHOLE AS
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(SELECT FIRSTNME, MIDINIT, LASTNAME, SALARY,
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ROW_NUMBER() OVER (ORDER BY SALARY DESC) AS RN
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FROM EMPLOYEE)
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SELECT FIRSTNME, MIDINIT, LASTNAME, SALARY, RN
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FROM WHOLE
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WHERE RN BETWEEN 10 AND 15
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*/
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/*
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if ($offset) {
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$rt .= ' ' . $offset . ',';
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}
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$rt .= ' ' . $limit;
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*/
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return $rt;
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}
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return null;
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}
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/**
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* Converts database-layer column types to basic types
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*
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* @param string $real Real database-layer column type (i.e. "varchar(255)")
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* @return string Abstract column type (i.e. "string")
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*/
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function column($real) {
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if (is_array($real)) {
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$col = $real['name'];
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if (isset($real['limit'])) {
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$col .= '(' . $real['limit'] . ')';
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}
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return $col;
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}
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$col = str_replace(')', '', $real);
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$limit = null;
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if (strpos($col, '(') !== false) {
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list($col, $limit) = explode('(', $col);
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}
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if (in_array($col, array('date', 'time', 'datetime', 'timestamp'))) {
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return $col;
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}
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if ($col == 'smallint') {
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return 'boolean';
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}
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if (strpos($col, 'char') !== false) {
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return 'string';
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}
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if (strpos($col, 'clob') !== false) {
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return 'text';
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}
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if (strpos($col, 'blob') !== false || $col == 'image') {
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return 'binary';
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}
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if (in_array($col, array('double', 'real', 'decimal'))) {
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return 'float';
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}
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return 'text';
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}
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/**
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* Maps a result set to an array so that returned fields are
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* grouped by model. Any calculated fields, or fields that
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* do not correspond to a particular model belong under array
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* key 0.
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*
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* 1. Gets the column headers
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*
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* Post.id
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* Post.title
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*
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* [0] => Array
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* (
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* [0] => Post
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* [1] => id
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* )
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*
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* [1] => Array
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* (
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* [0] => Post
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* [1] => title
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* )
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*
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|
* @param unknown_type $results
|
|
*/
|
|
function resultSet(&$results, $sql = null) {
|
|
$this->results =& $results;
|
|
$this->map = $this->_resultMap[$this->results];
|
|
}
|
|
/**
|
|
* Fetches the next row from the current result set
|
|
* Maps the records in the $result property to the map
|
|
* created in resultSet().
|
|
*
|
|
* 2. Gets the actual values.
|
|
*
|
|
* @return unknown
|
|
*/
|
|
function fetchResult() {
|
|
if ($row = db2_fetch_array($this->results)) {
|
|
$resultRow = array();
|
|
$i = 0;
|
|
|
|
foreach ($row as $index => $field) {
|
|
$table = $this->map[$index][0];
|
|
$column = strtolower($this->map[$index][1]);
|
|
$resultRow[$table][$column] = $row[$index];
|
|
$i++;
|
|
}
|
|
return $resultRow;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
?>
|