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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Db
* @subpackage Statement
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Db_Statement
*/
require_once 'Zend/Db/Statement.php';
/**
* Extends for Microsoft SQL Server Driver for PHP
*
* @category Zend
* @package Zend_Db
* @subpackage Statement
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Db_Statement_Sqlsrv extends Zend_Db_Statement
{
/**
* The connection_stmt object original string.
*/
protected $_originalSQL;
/**
* Column names.
*/
protected $_keys;
/**
* Query executed
*/
protected $_executed = false;
/**
* Prepares statement handle
*
* @param string $sql
* @return void
* @throws Zend_Db_Statement_Sqlsrv_Exception
*/
protected function _prepare($sql)
{
$connection = $this->_adapter->getConnection();
$this->_stmt = sqlsrv_prepare($connection, $sql);
if (!$this->_stmt) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception(sqlsrv_errors());
}
$this->_originalSQL = $sql;
}
/**
* Binds a parameter to the specified variable name.
*
* @param mixed $parameter Name the parameter, either integer or string.
* @param mixed $variable Reference to PHP variable containing the value.
* @param mixed $type OPTIONAL Datatype of SQL parameter.
* @param mixed $length OPTIONAL Length of SQL parameter.
* @param mixed $options OPTIONAL Other options.
* @return bool
* @throws Zend_Db_Statement_Exception
*/
protected function _bindParam($parameter, &$variable, $type = null, $length = null, $options = null)
{
//Sql server doesn't support bind by name
return true;
}
/**
* Closes the cursor, allowing the statement to be executed again.
*
* @return bool
*/
public function closeCursor()
{
if (!$this->_stmt) {
return false;
}
sqlsrv_free_stmt($this->_stmt);
$this->_stmt = false;
return true;
}
/**
* Returns the number of columns in the result set.
* Returns null if the statement has no result set metadata.
*
* @return int The number of columns.
*/
public function columnCount()
{
if ($this->_stmt && $this->_executed) {
return sqlsrv_num_fields($this->_stmt);
}
return 0;
}
/**
* Retrieves the error code, if any, associated with the last operation on
* the statement handle.
*
* @return string error code.
*/
public function errorCode()
{
if (!$this->_stmt) {
return false;
}
$error = sqlsrv_errors();
if (!$error) {
return false;
}
return $error[0]['code'];
}
/**
* Retrieves an array of error information, if any, associated with the
* last operation on the statement handle.
*
* @return array
*/
public function errorInfo()
{
if (!$this->_stmt) {
return false;
}
$error = sqlsrv_errors();
if (!$error) {
return false;
}
return array(
$error[0]['code'],
$error[0]['message'],
);
}
/**
* Executes a prepared statement.
*
* @param array $params OPTIONAL Values to bind to parameter placeholders.
* @return bool
* @throws Zend_Db_Statement_Exception
*/
public function _execute(array $params = null)
{
$connection = $this->_adapter->getConnection();
if (!$this->_stmt) {
return false;
}
if ($params !== null) {
if (!is_array($params)) {
$params = array($params);
}
$error = false;
// make all params passed by reference
$params_ = array();
$temp = array();
$i = 1;
foreach ($params as $param) {
$temp[$i] = $param;
$params_[] = &$temp[$i];
$i++;
}
$params = $params_;
}
$this->_stmt = sqlsrv_query($connection, $this->_originalSQL, $params);
if (!$this->_stmt) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception(sqlsrv_errors());
}
$this->_executed = true;
return (!$this->_stmt);
}
/**
* Fetches a row from the result set.
*
* @param int $style OPTIONAL Fetch mode for this fetch operation.
* @param int $cursor OPTIONAL Absolute, relative, or other.
* @param int $offset OPTIONAL Number for absolute or relative cursors.
* @return mixed Array, object, or scalar depending on fetch mode.
* @throws Zend_Db_Statement_Exception
*/
public function fetch($style = null, $cursor = null, $offset = null)
{
if (!$this->_stmt) {
return false;
}
if (null === $style) {
$style = $this->_fetchMode;
}
$values = sqlsrv_fetch_array($this->_stmt, SQLSRV_FETCH_ASSOC);
if (!$values && (null !== $error = sqlsrv_errors())) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception($error);
}
if (null === $values) {
return null;
}
if (!$this->_keys) {
foreach ($values as $key => $value) {
$this->_keys[] = $this->_adapter->foldCase($key);
}
}
$values = array_values($values);
$row = false;
switch ($style) {
case Zend_Db::FETCH_NUM:
$row = $values;
break;
case Zend_Db::FETCH_ASSOC:
$row = array_combine($this->_keys, $values);
break;
case Zend_Db::FETCH_BOTH:
$assoc = array_combine($this->_keys, $values);
$row = array_merge($values, $assoc);
break;
case Zend_Db::FETCH_OBJ:
$row = (object) array_combine($this->_keys, $values);
break;
case Zend_Db::FETCH_BOUND:
$assoc = array_combine($this->_keys, $values);
$row = array_merge($values, $assoc);
$row = $this->_fetchBound($row);
break;
default:
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception("Invalid fetch mode '$style' specified");
break;
}
return $row;
}
/**
* Returns a single column from the next row of a result set.
*
* @param int $col OPTIONAL Position of the column to fetch.
* @return string
* @throws Zend_Db_Statement_Exception
*/
public function fetchColumn($col = 0)
{
if (!$this->_stmt) {
return false;
}
if (!sqlsrv_fetch($this->_stmt)) {
if (null !== $error = sqlsrv_errors()) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception($error);
}
// If no error, there is simply no record
return false;
}
$data = sqlsrv_get_field($this->_stmt, $col); //0-based
if ($data === false) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception(sqlsrv_errors());
}
return $data;
}
/**
* Fetches the next row and returns it as an object.
*
* @param string $class OPTIONAL Name of the class to create.
* @param array $config OPTIONAL Constructor arguments for the class.
* @return mixed One object instance of the specified class.
* @throws Zend_Db_Statement_Exception
*/
public function fetchObject($class = 'stdClass', array $config = array())
{
if (!$this->_stmt) {
return false;
}
$obj = sqlsrv_fetch_object($this->_stmt);
if ($error = sqlsrv_errors()) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception($error);
}
/* @todo XXX handle parameters */
if (null === $obj) {
return false;
}
return $obj;
}
/**
* Returns metadata for a column in a result set.
*
* @param int $column
* @return mixed
* @throws Zend_Db_Statement_Sqlsrv_Exception
*/
public function getColumnMeta($column)
{
$fields = sqlsrv_field_metadata($this->_stmt);
if (!$fields) {
throw new Zend_Db_Statement_Sqlsrv_Exception('Column metadata can not be fetched');
}
if (!isset($fields[$column])) {
throw new Zend_Db_Statement_Sqlsrv_Exception('Column index does not exist in statement');
}
return $fields[$column];
}
/**
* Retrieves the next rowset (result set) for a SQL statement that has
* multiple result sets. An example is a stored procedure that returns
* the results of multiple queries.
*
* @return bool
* @throws Zend_Db_Statement_Exception
*/
public function nextRowset()
{
if (sqlsrv_next_result($this->_stmt) === false) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception(sqlsrv_errors());
}
//else - moved to next (or there are no more rows)
}
/**
* Returns the number of rows affected by the execution of the
* last INSERT, DELETE, or UPDATE statement executed by this
* statement object.
*
* @return int The number of rows affected.
* @throws Zend_Db_Statement_Exception
*/
public function rowCount()
{
if (!$this->_stmt) {
return false;
}
if (!$this->_executed) {
return 0;
}
$num_rows = sqlsrv_rows_affected($this->_stmt);
// Strict check is necessary; 0 is a valid return value
if ($num_rows === false) {
require_once 'Zend/Db/Statement/Sqlsrv/Exception.php';
throw new Zend_Db_Statement_Sqlsrv_Exception(sqlsrv_errors());
}
return $num_rows;
}
}
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