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<?php
/* SVN FILE: $Id$ */
/**
* 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 $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @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 = $this->_execute("SELECT name FROM sysobjects WHERE type IN ('U', 'V')");
if (!$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;
}
}
}
?>
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