Subversion-Projekte lars-tiefland.cakephp

<?php

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

/**

 * Sybase layer 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.datasources.dbo

 * @since         CakePHP(tm) v 1.2.0.3097

 * @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 DboSybase extends DboSource {

/**

 * Driver description

 *

 * @var string

 */

	var $description = "Sybase DBO Driver";

/**

 * Start quote for quoted identifiers

 *

 * @var string

 */

	var $startQuote = "";

/**

 * End quote for quoted identifiers

 *

 * @var string

 */

	var $endQuote = "";

/**

 * Base configuration settings for Sybase driver

 *

 * @var array

 */

	var $_baseConfig = array(

		'persistent' => true,

		'host' => 'localhost',

		'login' => 'sa',

		'password' => '',

		'database' => 'cake',

		'port' => '4100'

	);

/**

 * Sybase column definition

 *

 * @var array

 */

	var $columns = array(

		'primary_key' => array('name' => 'numeric(9,0) IDENTITY PRIMARY KEY'),

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

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

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

		'float' => array('name' => 'float', 'formatter' => 'floatval'),

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

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

		'time' => array('name' => 'datetime', 'format' => 'H:i:s', 'formatter' => 'date'),

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

		'binary' => array('name' => 'image'),

		'boolean' => array('name' => 'bit')

	);

/**

 * 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;

		$this->connected = false;

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

			$this->connection = sybase_connect($config['host'], $config['login'], $config['password'], true);

		} else {

			$this->connection = sybase_pconnect($config['host'], $config['login'], $config['password']);

		}

		if (sybase_select_db($config['database'], $this->connection)) {

			$this->connected = true;

		}

		return $this->connected;

	}

/**

 * Disconnects from database.

 *

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

 */

	function disconnect() {

		$this->connected = !@sybase_close($this->connection);

		return !$this->connected;

	}

/**

 * Executes given SQL statement.

 *

 * @param string $sql SQL statement

 * @return resource Result resource identifier

 * @access protected

 */

	function _execute($sql) {

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

	}

/**

 * 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 = $this->_execute("select name from sysobjects where type='U'");

		if (!$result) {

			return array();

		} else {

			$tables = array();

			while ($line = sybase_fetch_array($result)) {

				$tables[] = $line[0];

			}

			parent::listSources($tables);

			return $tables;

		}

	}

/**

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

 *

 * @param string $tableName Name of database table to inspect

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

 */

	function describe(&$model) {

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

		if ($cache != null) {

			return $cache;

		}

		$fields = false;

		$cols = $this->query('DESC ' . $this->fullTableName($model));

		foreach ($cols as $column) {

			$colKey = array_keys($column);

			if (isset($column[$colKey[0]]) && !isset($column[0])) {

				$column[0] = $column[$colKey[0]];

			}

			if (isset($column[0])) {

				$fields[$column[0]['Field']] = array('type' => $this->column($column[0]['Type']),

													'null' => $column[0]['Null'],

													'length' => $this->length($column[0]['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

 * @param boolean $safe Whether or not numeric data should be handled automagically if no column data is provided

 * @return string Quoted and escaped data

 */

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

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

		if ($parent != null) {

			return $parent;

		}

		if ($data === null) {

			return 'NULL';

		}

		if ($data === '') {

			return  "''";

		}

		switch ($column) {

			case 'boolean':

				$data = $this->boolean((bool)$data);

			break;

			default:

				$data = str_replace("'", "''", $data);

			break;

		}

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

	}

/**

 * Begin a transaction

 *

 * @param unknown_type $model

 * @return boolean True on success, false on fail

 * (i.e. if the database/model does not support transactions).

 */

	function begin(&$model) {

		if (parent::begin($model)) {

			if ($this->execute('BEGIN TRAN')) {

				$this->_transactionStarted = true;

				return true;

			}

		}

		return false;

	}

/**

 * Commit a transaction

 *

 * @param unknown_type $model

 * @return boolean True on success, false on fail

 * (i.e. if the database/model does not support transactions,

 * or a transaction has not started).

 */

	function commit(&$model) {

		if (parent::commit($model)) {

			$this->_transactionStarted = false;

			return $this->execute('COMMIT TRAN');

		}

		return false;

	}

/**

 * Rollback a transaction

 *

 * @param unknown_type $model

 * @return boolean True on success, false on fail

 * (i.e. if the database/model does not support transactions,

 * or a transaction has not started).

 */

	function rollback(&$model) {

		if (parent::rollback($model)) {

			return $this->execute('ROLLBACK TRAN');

		}

		return false;

	}

/**

 * Returns a formatted error message from previous database operation.

 *

 * @todo not implemented

 * @return string Error message with error number

 */

	function lastError() {

		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->_result) {

			return sybase_affected_rows($this->connection);

		}

		return null;

	}

/**

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

 * this returns false.

 *

 * @return integer Number of rows in resultset

 */

	function lastNumRows() {

		if ($this->hasResult()) {

			return @sybase_num_rows($this->_result);

		}

		return null;

	}

/**

 * Returns the ID generated from the previous INSERT operation.

 *

 * @param unknown_type $source

 * @return in

 */

	function lastInsertId($source = null) {

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

		return $result[0];

	}

/**

 * Converts database-layer column types to basic types

 *

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

 * @return string Abstract column type (i.e. "string")

 */

	function column($real) {

		if (is_array($real)) {

			$col = $real['name'];

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

			{

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

			}

			return $col;

		}

		$col = str_replace(')', '', $real);

		$limit = null;

		if (strpos($col, '(') !== false) {

			list($col, $limit) = explode('(', $col);

		}

		if (in_array($col, array('datetime', 'smalldatetime'))) {

			return 'datetime';

		} elseif (in_array($col, array('int', 'bigint', 'smallint', 'tinyint'))) {

			return 'integer';

		} elseif (in_array($col, array('float', 'double', 'real', 'decimal', 'money', 'numeric', 'smallmoney'))) {

			return 'float';

		} elseif (strpos($col, 'text') !== false) {

			return 'text';

		} elseif (in_array($col, array('char', 'nchar', 'nvarchar', 'string', 'varchar'))) {

			return 'binary';

		} elseif (in_array($col, array('binary', 'image', 'varbinary'))) {

			return 'binary';

		}

		return 'text';

	}

/**

 * Enter description here...

 *

 * @param unknown_type $results

 */

	function resultSet(&$results) {

		$this->results =& $results;

		$this->map = array();

		$num_fields = sybase_num_fields($results);

		$index = 0;

		$j = 0;

		while ($j < $num_fields) {

			$column = sybase_fetch_field($results,$j);

			if (!empty($column->table)) {

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

			} else {

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

			}

			$j++;

		}

	}

/**

 * Fetches the next row from the current result set

 *

 * @return unknown

 */

	function fetchResult() {

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

			$resultRow = array();

			$i = 0;

			foreach ($row as $index => $field) {

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

				$resultRow[$table][$column] = $row[$index];

				$i++;

			}

			return $resultRow;

		} else {

			return false;

		}

	}

}

?>