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423 lines
14 KiB
PHP
423 lines
14 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Mssql.php 17792 2009-08-24 16:18:02Z ralph $
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*/
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/**
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* @see Zend_Db_Adapter_Pdo_Abstract
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*/
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require_once 'Zend/Db/Adapter/Pdo/Abstract.php';
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/**
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* Class for connecting to Microsoft SQL Server databases and performing common operations.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Db_Adapter_Pdo_Mssql extends Zend_Db_Adapter_Pdo_Abstract
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{
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/**
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* PDO type.
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*
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* @var string
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*/
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protected $_pdoType = 'mssql';
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/**
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* Keys are UPPERCASE SQL datatypes or the constants
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* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
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*
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* Values are:
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* 0 = 32-bit integer
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* 1 = 64-bit integer
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* 2 = float or decimal
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*
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* @var array Associative array of datatypes to values 0, 1, or 2.
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*/
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protected $_numericDataTypes = array(
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Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
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Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
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Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
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'INT' => Zend_Db::INT_TYPE,
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'SMALLINT' => Zend_Db::INT_TYPE,
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'TINYINT' => Zend_Db::INT_TYPE,
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'BIGINT' => Zend_Db::BIGINT_TYPE,
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'DECIMAL' => Zend_Db::FLOAT_TYPE,
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'FLOAT' => Zend_Db::FLOAT_TYPE,
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'MONEY' => Zend_Db::FLOAT_TYPE,
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'NUMERIC' => Zend_Db::FLOAT_TYPE,
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'REAL' => Zend_Db::FLOAT_TYPE,
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'SMALLMONEY' => Zend_Db::FLOAT_TYPE
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);
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/**
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* Creates a PDO DSN for the adapter from $this->_config settings.
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*
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* @return string
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*/
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protected function _dsn()
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{
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// baseline of DSN parts
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$dsn = $this->_config;
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// don't pass the username and password in the DSN
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unset($dsn['username']);
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unset($dsn['password']);
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unset($dsn['options']);
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unset($dsn['persistent']);
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unset($dsn['driver_options']);
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if (isset($dsn['port'])) {
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$seperator = ':';
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if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
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$seperator = ',';
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}
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$dsn['host'] .= $seperator . $dsn['port'];
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unset($dsn['port']);
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}
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// this driver supports multiple DSN prefixes
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// @see http://www.php.net/manual/en/ref.pdo-dblib.connection.php
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if (isset($dsn['pdoType'])) {
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switch (strtolower($dsn['pdoType'])) {
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case 'freetds':
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case 'sybase':
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$this->_pdoType = 'sybase';
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break;
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case 'mssql':
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$this->_pdoType = 'mssql';
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break;
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case 'dblib':
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default:
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$this->_pdoType = 'dblib';
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break;
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}
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unset($dsn['pdoType']);
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}
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// use all remaining parts in the DSN
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foreach ($dsn as $key => $val) {
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$dsn[$key] = "$key=$val";
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}
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$dsn = $this->_pdoType . ':' . implode(';', $dsn);
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return $dsn;
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}
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/**
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* @return void
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*/
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protected function _connect()
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{
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if ($this->_connection) {
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return;
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}
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parent::_connect();
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$this->_connection->exec('SET QUOTED_IDENTIFIER ON');
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}
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/**
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* Begin a transaction.
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*
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* It is necessary to override the abstract PDO transaction functions here, as
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* the PDO driver for MSSQL does not support transactions.
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*/
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protected function _beginTransaction()
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{
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$this->_connect();
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$this->_connection->exec('BEGIN TRANSACTION');
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return true;
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}
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/**
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* Commit a transaction.
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*
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* It is necessary to override the abstract PDO transaction functions here, as
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* the PDO driver for MSSQL does not support transactions.
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*/
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protected function _commit()
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{
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$this->_connect();
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$this->_connection->exec('COMMIT TRANSACTION');
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return true;
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}
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/**
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* Roll-back a transaction.
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*
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* It is necessary to override the abstract PDO transaction functions here, as
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* the PDO driver for MSSQL does not support transactions.
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*/
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protected function _rollBack() {
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$this->_connect();
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$this->_connection->exec('ROLLBACK TRANSACTION');
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return true;
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}
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/**
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* Returns a list of the tables in the database.
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*
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* @return array
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*/
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public function listTables()
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{
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$sql = "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";
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return $this->fetchCol($sql);
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}
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/**
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* Returns the column descriptions for a table.
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*
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* The return value is an associative array keyed by the column name,
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* as returned by the RDBMS.
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*
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* The value of each array element is an associative array
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* with the following keys:
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*
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* SCHEMA_NAME => string; name of database or schema
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* TABLE_NAME => string;
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* COLUMN_NAME => string; column name
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* COLUMN_POSITION => number; ordinal position of column in table
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* DATA_TYPE => string; SQL datatype name of column
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* DEFAULT => string; default expression of column, null if none
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* NULLABLE => boolean; true if column can have nulls
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* LENGTH => number; length of CHAR/VARCHAR
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* SCALE => number; scale of NUMERIC/DECIMAL
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* PRECISION => number; precision of NUMERIC/DECIMAL
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* UNSIGNED => boolean; unsigned property of an integer type
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* PRIMARY => boolean; true if column is part of the primary key
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* PRIMARY_POSITION => integer; position of column in primary key
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* PRIMARY_AUTO => integer; position of auto-generated column in primary key
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*
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* @todo Discover column primary key position.
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* @todo Discover integer unsigned property.
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*
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* @param string $tableName
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* @param string $schemaName OPTIONAL
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* @return array
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*/
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public function describeTable($tableName, $schemaName = null)
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{
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if ($schemaName != null) {
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if (strpos($schemaName, '.') !== false) {
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$result = explode('.', $schemaName);
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$schemaName = $result[1];
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}
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}
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/**
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* Discover metadata information about this table.
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*/
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$sql = "exec sp_columns @table_name = " . $this->quoteIdentifier($tableName, true);
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if ($schemaName != null) {
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$sql .= ", @table_owner = " . $this->quoteIdentifier($schemaName, true);
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}
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$stmt = $this->query($sql);
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$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
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$table_name = 2;
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$column_name = 3;
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$type_name = 5;
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$precision = 6;
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$length = 7;
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$scale = 8;
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$nullable = 10;
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$column_def = 12;
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$column_position = 16;
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/**
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* Discover primary key column(s) for this table.
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*/
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$sql = "exec sp_pkeys @table_name = " . $this->quoteIdentifier($tableName, true);
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if ($schemaName != null) {
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$sql .= ", @table_owner = " . $this->quoteIdentifier($schemaName, true);
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}
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$stmt = $this->query($sql);
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$primaryKeysResult = $stmt->fetchAll(Zend_Db::FETCH_NUM);
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$primaryKeyColumn = array();
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$pkey_column_name = 3;
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$pkey_key_seq = 4;
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foreach ($primaryKeysResult as $pkeysRow) {
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$primaryKeyColumn[$pkeysRow[$pkey_column_name]] = $pkeysRow[$pkey_key_seq];
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}
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$desc = array();
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$p = 1;
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foreach ($result as $key => $row) {
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$identity = false;
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$words = explode(' ', $row[$type_name], 2);
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if (isset($words[0])) {
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$type = $words[0];
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if (isset($words[1])) {
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$identity = (bool) preg_match('/identity/', $words[1]);
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}
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}
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$isPrimary = array_key_exists($row[$column_name], $primaryKeyColumn);
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if ($isPrimary) {
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$primaryPosition = $primaryKeyColumn[$row[$column_name]];
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} else {
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$primaryPosition = null;
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}
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$desc[$this->foldCase($row[$column_name])] = array(
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'SCHEMA_NAME' => null, // @todo
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'TABLE_NAME' => $this->foldCase($row[$table_name]),
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'COLUMN_NAME' => $this->foldCase($row[$column_name]),
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'COLUMN_POSITION' => (int) $row[$column_position],
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'DATA_TYPE' => $type,
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'DEFAULT' => $row[$column_def],
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'NULLABLE' => (bool) $row[$nullable],
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'LENGTH' => $row[$length],
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'SCALE' => $row[$scale],
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'PRECISION' => $row[$precision],
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'UNSIGNED' => null, // @todo
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'PRIMARY' => $isPrimary,
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'PRIMARY_POSITION' => $primaryPosition,
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'IDENTITY' => $identity
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);
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}
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return $desc;
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}
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/**
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* Adds an adapter-specific LIMIT clause to the SELECT statement.
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*
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* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
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*
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* @param string $sql
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* @param integer $count
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* @param integer $offset OPTIONAL
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* @throws Zend_Db_Adapter_Exception
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* @return string
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*/
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public function limit($sql, $count, $offset = 0)
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{
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$count = intval($count);
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if ($count <= 0) {
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/** @see Zend_Db_Adapter_Exception */
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid");
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}
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$offset = intval($offset);
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if ($offset < 0) {
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/** @see Zend_Db_Adapter_Exception */
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid");
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}
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$sql = preg_replace(
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'/^SELECT\s+(DISTINCT\s)?/i',
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'SELECT $1TOP ' . ($count+$offset) . ' ',
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$sql
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);
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if ($offset > 0) {
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$orderby = stristr($sql, 'ORDER BY');
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if ($orderby !== false) {
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$orderParts = explode(',', substr($orderby, 8));
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$pregReplaceCount = null;
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$orderbyInverseParts = array();
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foreach ($orderParts as $orderPart) {
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$orderPart = rtrim($orderPart);
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$inv = preg_replace('/\s+desc$/i', ' ASC', $orderPart, 1, $pregReplaceCount);
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if ($pregReplaceCount) {
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$orderbyInverseParts[] = $inv;
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continue;
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}
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$inv = preg_replace('/\s+asc$/i', ' DESC', $orderPart, 1, $pregReplaceCount);
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if ($pregReplaceCount) {
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$orderbyInverseParts[] = $inv;
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continue;
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} else {
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$orderbyInverseParts[] = $orderPart . ' DESC';
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}
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}
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$orderbyInverse = 'ORDER BY ' . implode(', ', $orderbyInverseParts);
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}
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$sql = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $sql . ') AS inner_tbl';
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if ($orderby !== false) {
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$sql .= ' ' . $orderbyInverse . ' ';
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}
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$sql .= ') AS outer_tbl';
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if ($orderby !== false) {
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$sql .= ' ' . $orderby;
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}
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}
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return $sql;
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}
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/**
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* Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
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*
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* As a convention, on RDBMS brands that support sequences
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* (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
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* from the arguments and returns the last id generated by that sequence.
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* On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
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* returns the last value generated for such a column, and the table name
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* argument is disregarded.
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*
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* Microsoft SQL Server does not support sequences, so the arguments to
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* this method are ignored.
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*
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* @param string $tableName OPTIONAL Name of table.
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* @param string $primaryKey OPTIONAL Name of primary key column.
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* @return string
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* @throws Zend_Db_Adapter_Exception
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*/
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public function lastInsertId($tableName = null, $primaryKey = null)
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{
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$sql = 'SELECT SCOPE_IDENTITY()';
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return (int)$this->fetchOne($sql);
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}
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/**
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* Retrieve server version in PHP style
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* Pdo_Mssql doesn't support getAttribute(PDO::ATTR_SERVER_VERSION)
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* @return string
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*/
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public function getServerVersion()
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{
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try {
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$stmt = $this->query("SELECT SERVERPROPERTY('productversion')");
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$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
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if (count($result)) {
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return $result[0][0];
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}
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return null;
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} catch (PDOException $e) {
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return null;
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}
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}
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} |