Subversion-Projekte lars-tiefland.cakephp

<?php

/* SVN FILE: $Id: dbo_odbc.php 7945 2008-12-19 02:16:01Z gwoo $ */

/**

 * ODBC for DBO

 *

 * Long description for file

 *

 * PHP versions 4 and 5

 *

 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)

 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)

 *

 * Licensed under The MIT License

 * Redistributions of files must retain the above copyright notice.

 *

 * @filesource

 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)

 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project

 * @package       cake

 * @subpackage    cake.cake.libs.model.dbo

 * @since         CakePHP(tm) v 0.10.5.1790

 * @version       $Revision: 7945 $

 * @modifiedby    $LastChangedBy: gwoo $

 * @lastmodified  $Date: 2008-12-18 18:16:01 -0800 (Thu, 18 Dec 2008) $

 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License

 */

/**

 * Short description for class.

 *

 * Long description for class

 *

 * @package       cake

 * @subpackage    cake.cake.libs.model.datasources.dbo

 */

class DboOdbc extends DboSource {

/**

 * Driver description

 *

 * @var string

 */

	var $description = "ODBC DBO Driver";

/**

 * Table/column starting quote

 *

 * @var string

 */

	var $startQuote = "`";

/**

 * Table/column end quote

 *

 * @var string

 */

	var $endQuote = "`";

/**

 * Driver base configuration

 *

 * @var array

 */

	var $_baseConfig = array(

		'persistent' => true,

		'login' => 'root',

		'password' => '',

		'database' => 'cake',

		'connect'  => 'odbc_pconnect'

	);

/**

 * Enter description here...

 *

 * @var unknown_type

 */

	var $columns = array();

	//	var $columns = array('primary_key' => array('name' => 'int(11) DEFAULT NULL auto_increment'),

	//						'string' => array('name' => 'varchar', 'limit' => '255'),

	//						'text' => array('name' => 'text'),

	//						'integer' => array('name' => 'int', 'limit' => '11'),

	//						'float' => array('name' => 'float'),

	//						'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d h:i:s', 'formatter' => 'date'),

	//						'timestamp' => array('name' => 'datetime', 'format' => 'Y-m-d h:i:s', 'formatter' => 'date'),

	//						'time' => array('name' => 'time', 'format' => 'h:i:s', 'formatter' => 'date'),

	//						'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),

	//						'binary' => array('name' => 'blob'),

	//						'boolean' => array('name' => 'tinyint', 'limit' => '1'));

/**

 * Connects to the database using options in the given configuration array.

 *

 * @return boolean True if the database could be connected, else false

 */

	function connect() {

		$config = $this->config;

		$connect = $config['connect'];

		if (!$config['persistent']) {

			$connect = 'odbc_connect';

		}

		if (!function_exists($connect)) {

			die('no odbc?');

		}

		$this->connected = false;

		$this->connection = $connect($config['database'], $config['login'], $config['password'],  SQL_CUR_USE_ODBC);

		if ($this->connection) {

			$this->connected = true;

		}

		return $this->connected;

	}

/**

 * Disconnects from database.

 *

 * @return boolean True if the database could be disconnected, else false

 */

	function disconnect() {

		return @odbc_close($this->connection);

	}

/**

 * Executes given SQL statement.

 *

 * @param string $sql SQL statement

 * @return resource Result resource identifier

 * @access protected

 */

	function _execute($sql) {

		switch ($sql) {

			case 'BEGIN':

				return odbc_autocommit($this->connection, false);

			case 'COMMIT':

				return odbc_commit($this->connection);

			case 'ROLLBACK':

				return odbc_rollback($this->connection);

		}

		// TODO: should flags be set? possible requirement:  SQL_CURSOR_STATIC

		return odbc_exec($this->connection, $sql);

	}

/**

 * Returns an array of sources (tables) in the database.

 *

 * @return array Array of tablenames in the database

 */

	function listSources() {

		$cache = parent::listSources();

		if ($cache != null) {

			return $cache;

		}

		$result = odbc_tables($this->connection);

		$tables = array();

		while (odbc_fetch_row($result)) {

			array_push($tables, odbc_result($result, 'TABLE_NAME'));

		}

		parent::listSources($tables);

		return $tables;

	}

/**

 * Returns an array of the fields in given table name.

 *

 * @param Model $model Model object to describe

 * @return array Fields in table. Keys are name and type

 */

	function &describe(&$model) {

		$cache=parent::describe($model);

		if ($cache != null) {

				return $cache;

		}

		$fields = array();

		$sql = 'SELECT * FROM ' . $this->fullTableName($model);

		$result = odbc_exec($this->connection, $sql);

		$count = odbc_num_fields($result);

		for ($i = 1; $i <= $count; $i++) {

				$cols[$i - 1] = odbc_field_name($result, $i);

		}

		foreach ($cols as $column) {

			$type = odbc_field_type(odbc_exec($this->connection, 'SELECT ' . $column . ' FROM ' . $this->fullTableName($model)), 1);

			$fields[$column] = array('type' => $type);

		}

		$this->__cacheDescription($model->tablePrefix . $model->table, $fields);

		return $fields;

	}

/**

 * Returns a quoted and escaped string of $data for use in an SQL statement.

 *

 * @param string $data String to be prepared for use in an SQL statement

 * @param string $column The column into which this data will be inserted

 * @return string Quoted and escaped

 * @todo Add logic that formats/escapes data based on column type

 */

	function value($data, $column = null) {

		$parent=parent::value($data, $column);

		if ($parent != null) {

				return $parent;

		}

		if ($data === null) {

				return 'NULL';

		}

		if (!is_numeric($data)) {

				return "'" . $data . "'";

		}

		return $data;

	}

/**

 * Returns a formatted error message from previous database operation.

 *

 * @return string Error message with error number

 */

	function lastError() {

		if ($error = odbc_errormsg($this->connection)) {

			return odbc_error($this->connection) . ': ' . $error;

		}

		return null;

	}

/**

 * Returns number of affected rows in previous database operation. If no previous operation exists,

 * this returns false.

 *

 * @return integer Number of affected rows

 */

	function lastAffected() {

		if ($this->hasResult()) {

			return odbc_num_rows($this->_result);

		}

		return null;

	}

/**

 * Returns number of rows in previous resultset. If no previous resultset exists,

 * this returns false.

 *

 * @return int Number of rows in resultset

 */

	function lastNumRows() {

		if ($this->hasResult()) {

			return odbc_num_rows($this->_result);

		}

		return null;

	}

/**

 * Returns the ID generated from the previous INSERT operation.

 *

 * @param unknown_type $source

 * @return int

 */

	function lastInsertId($source = null) {

		$result = $this->fetchRow('SELECT @@IDENTITY');

		return $result[0];

	}

/**

 * Enter description here...

 *

 * @param string $real Real database-layer column type (i.e. "varchar(255)")

 */

	function column($real) {

		if (is_array($real)) {

			$col=$real['name'];

			if (isset($real['limit'])) {

				$col .= '(' . $real['limit'] . ')';

			}

			return $col;

		}

		return $real;

	}

/**

* Enter description here...

*

* @param unknown_type $results

*/

	function resultSet(&$results) {

		$this->results =& $results;

		$num_fields = odbc_num_fields($results);

		$this->map = array();

		$index = 0;

		$j = 0;

		while ($j < $num_fields) {

			$column = odbc_field_name($results, $j+1);

			if (strpos($column, '_dot_') !== false) {

				list($table, $column) = explode('_dot_', $column);

				$this->map[$index++] = array($table, $column);

			} else {

				$this->map[$index++] = array(0, $column);

			}

			$j++;

		}

	}

/**

* Generates the fields list of an SQL query.

*

* @param Model $model

* @param string $alias Alias tablename

* @param mixed $fields

* @return array

*/

	function fields(&$model, $alias = null, $fields = null, $quote = true) {

		if (empty($alias)) {

			$alias = $model->name;

		}

		if (!is_array($fields)) {

			if ($fields != null) {

				$fields = array_map('trim', explode(',', $fields));

			} else {

				foreach($model->tableToModel as $tableName => $modelName) {

					foreach($this->__descriptions[$model->tablePrefix .$tableName] as $field => $type) {

						$fields[] = $modelName .'.' .$field;

					}

				}

			}

		}

		$count = count($fields);

		if ($count >= 1 && $fields[0] != '*' && strpos($fields[0], 'COUNT(*)') === false) {

			for ($i = 0; $i < $count; $i++) {

				if (!preg_match('/^.+\\(.*\\)/', $fields[$i])) {

					$prepend = '';

					if (strpos($fields[$i], 'DISTINCT') !== false) {

						$prepend = 'DISTINCT ';

						$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));

					}

					if (strrpos($fields[$i], '.') === false) {

						$fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '_dot_' . $fields[$i]);

					} else {

						$build = explode('.', $fields[$i]);

						$fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '_dot_' . $build[1]);

					}

				}

			}

		}

		return $fields;

	}

/**

 * Fetches the next row from the current result set

 *

 * @return unknown

 */

	function fetchResult() {

		if ($row = odbc_fetch_row($this->results)) {

			$resultRow = array();

			$numFields = odbc_num_fields($this->results);

			$i = 0;

			for($i = 0; $i < $numFields; $i++) {

				list($table, $column) = $this->map[$i];

				$resultRow[$table][$column] = odbc_result($this->results, $i + 1);

			}

			return $resultRow;

		}

		return false;

	}

}

?>