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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 Adapter
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Mssql.php 18951 2009-11-12 16:26:19Z alexander $
*/
/**
* @see Zend_Db_Adapter_Pdo_Abstract
*/
require_once 'Zend/Db/Adapter/Pdo/Abstract.php';
/**
* Class for connecting to Microsoft SQL Server databases and performing common operations.
*
* @category Zend
* @package Zend_Db
* @subpackage Adapter
* @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_Adapter_Pdo_Mssql extends Zend_Db_Adapter_Pdo_Abstract
{
/**
* PDO type.
*
* @var string
*/
protected $_pdoType = 'mssql';
/**
* Keys are UPPERCASE SQL datatypes or the constants
* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
*
* Values are:
* 0 = 32-bit integer
* 1 = 64-bit integer
* 2 = float or decimal
*
* @var array Associative array of datatypes to values 0, 1, or 2.
*/
protected $_numericDataTypes = array(
Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
'INT' => Zend_Db::INT_TYPE,
'SMALLINT' => Zend_Db::INT_TYPE,
'TINYINT' => Zend_Db::INT_TYPE,
'BIGINT' => Zend_Db::BIGINT_TYPE,
'DECIMAL' => Zend_Db::FLOAT_TYPE,
'FLOAT' => Zend_Db::FLOAT_TYPE,
'MONEY' => Zend_Db::FLOAT_TYPE,
'NUMERIC' => Zend_Db::FLOAT_TYPE,
'REAL' => Zend_Db::FLOAT_TYPE,
'SMALLMONEY' => Zend_Db::FLOAT_TYPE
);
/**
* Creates a PDO DSN for the adapter from $this->_config settings.
*
* @return string
*/
protected function _dsn()
{
// baseline of DSN parts
$dsn = $this->_config;
// don't pass the username and password in the DSN
unset($dsn['username']);
unset($dsn['password']);
unset($dsn['options']);
unset($dsn['persistent']);
unset($dsn['driver_options']);
if (isset($dsn['port'])) {
$seperator = ':';
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
$seperator = ',';
}
$dsn['host'] .= $seperator . $dsn['port'];
unset($dsn['port']);
}
// this driver supports multiple DSN prefixes
// @see http://www.php.net/manual/en/ref.pdo-dblib.connection.php
if (isset($dsn['pdoType'])) {
switch (strtolower($dsn['pdoType'])) {
case 'freetds':
case 'sybase':
$this->_pdoType = 'sybase';
break;
case 'mssql':
$this->_pdoType = 'mssql';
break;
case 'dblib':
default:
$this->_pdoType = 'dblib';
break;
}
unset($dsn['pdoType']);
}
// use all remaining parts in the DSN
foreach ($dsn as $key => $val) {
$dsn[$key] = "$key=$val";
}
$dsn = $this->_pdoType . ':' . implode(';', $dsn);
return $dsn;
}
/**
* @return void
*/
protected function _connect()
{
if ($this->_connection) {
return;
}
parent::_connect();
$this->_connection->exec('SET QUOTED_IDENTIFIER ON');
}
/**
* Begin a transaction.
*
* It is necessary to override the abstract PDO transaction functions here, as
* the PDO driver for MSSQL does not support transactions.
*/
protected function _beginTransaction()
{
$this->_connect();
$this->_connection->exec('BEGIN TRANSACTION');
return true;
}
/**
* Commit a transaction.
*
* It is necessary to override the abstract PDO transaction functions here, as
* the PDO driver for MSSQL does not support transactions.
*/
protected function _commit()
{
$this->_connect();
$this->_connection->exec('COMMIT TRANSACTION');
return true;
}
/**
* Roll-back a transaction.
*
* It is necessary to override the abstract PDO transaction functions here, as
* the PDO driver for MSSQL does not support transactions.
*/
protected function _rollBack() {
$this->_connect();
$this->_connection->exec('ROLLBACK TRANSACTION');
return true;
}
/**
* Returns a list of the tables in the database.
*
* @return array
*/
public function listTables()
{
$sql = "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";
return $this->fetchCol($sql);
}
/**
* Returns the column descriptions for a table.
*
* The return value is an associative array keyed by the column name,
* as returned by the RDBMS.
*
* The value of each array element is an associative array
* with the following keys:
*
* SCHEMA_NAME => string; name of database or schema
* TABLE_NAME => string;
* COLUMN_NAME => string; column name
* COLUMN_POSITION => number; ordinal position of column in table
* DATA_TYPE => string; SQL datatype name of column
* DEFAULT => string; default expression of column, null if none
* NULLABLE => boolean; true if column can have nulls
* LENGTH => number; length of CHAR/VARCHAR
* SCALE => number; scale of NUMERIC/DECIMAL
* PRECISION => number; precision of NUMERIC/DECIMAL
* UNSIGNED => boolean; unsigned property of an integer type
* PRIMARY => boolean; true if column is part of the primary key
* PRIMARY_POSITION => integer; position of column in primary key
* PRIMARY_AUTO => integer; position of auto-generated column in primary key
*
* @todo Discover column primary key position.
* @todo Discover integer unsigned property.
*
* @param string $tableName
* @param string $schemaName OPTIONAL
* @return array
*/
public function describeTable($tableName, $schemaName = null)
{
if ($schemaName != null) {
if (strpos($schemaName, '.') !== false) {
$result = explode('.', $schemaName);
$schemaName = $result[1];
}
}
/**
* Discover metadata information about this table.
*/
$sql = "exec sp_columns @table_name = " . $this->quoteIdentifier($tableName, true);
if ($schemaName != null) {
$sql .= ", @table_owner = " . $this->quoteIdentifier($schemaName, true);
}
$stmt = $this->query($sql);
$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
$table_name = 2;
$column_name = 3;
$type_name = 5;
$precision = 6;
$length = 7;
$scale = 8;
$nullable = 10;
$column_def = 12;
$column_position = 16;
/**
* Discover primary key column(s) for this table.
*/
$sql = "exec sp_pkeys @table_name = " . $this->quoteIdentifier($tableName, true);
if ($schemaName != null) {
$sql .= ", @table_owner = " . $this->quoteIdentifier($schemaName, true);
}
$stmt = $this->query($sql);
$primaryKeysResult = $stmt->fetchAll(Zend_Db::FETCH_NUM);
$primaryKeyColumn = array();
$pkey_column_name = 3;
$pkey_key_seq = 4;
foreach ($primaryKeysResult as $pkeysRow) {
$primaryKeyColumn[$pkeysRow[$pkey_column_name]] = $pkeysRow[$pkey_key_seq];
}
$desc = array();
$p = 1;
foreach ($result as $key => $row) {
$identity = false;
$words = explode(' ', $row[$type_name], 2);
if (isset($words[0])) {
$type = $words[0];
if (isset($words[1])) {
$identity = (bool) preg_match('/identity/', $words[1]);
}
}
$isPrimary = array_key_exists($row[$column_name], $primaryKeyColumn);
if ($isPrimary) {
$primaryPosition = $primaryKeyColumn[$row[$column_name]];
} else {
$primaryPosition = null;
}
$desc[$this->foldCase($row[$column_name])] = array(
'SCHEMA_NAME' => null, // @todo
'TABLE_NAME' => $this->foldCase($row[$table_name]),
'COLUMN_NAME' => $this->foldCase($row[$column_name]),
'COLUMN_POSITION' => (int) $row[$column_position],
'DATA_TYPE' => $type,
'DEFAULT' => $row[$column_def],
'NULLABLE' => (bool) $row[$nullable],
'LENGTH' => $row[$length],
'SCALE' => $row[$scale],
'PRECISION' => $row[$precision],
'UNSIGNED' => null, // @todo
'PRIMARY' => $isPrimary,
'PRIMARY_POSITION' => $primaryPosition,
'IDENTITY' => $identity
);
}
return $desc;
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
*
* @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html
*
* @param string $sql
* @param integer $count
* @param integer $offset OPTIONAL
* @throws Zend_Db_Adapter_Exception
* @return string
*/
public function limit($sql, $count, $offset = 0)
{
$count = intval($count);
if ($count <= 0) {
/** @see Zend_Db_Adapter_Exception */
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid");
}
$offset = intval($offset);
if ($offset < 0) {
/** @see Zend_Db_Adapter_Exception */
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid");
}
$sql = preg_replace(
'/^SELECT\s+(DISTINCT\s)?/i',
'SELECT $1TOP ' . ($count+$offset) . ' ',
$sql
);
if ($offset > 0) {
$orderby = stristr($sql, 'ORDER BY');
if ($orderby !== false) {
$orderParts = explode(',', substr($orderby, 8));
$pregReplaceCount = null;
$orderbyInverseParts = array();
foreach ($orderParts as $orderPart) {
$orderPart = rtrim($orderPart);
$inv = preg_replace('/\s+desc$/i', ' ASC', $orderPart, 1, $pregReplaceCount);
if ($pregReplaceCount) {
$orderbyInverseParts[] = $inv;
continue;
}
$inv = preg_replace('/\s+asc$/i', ' DESC', $orderPart, 1, $pregReplaceCount);
if ($pregReplaceCount) {
$orderbyInverseParts[] = $inv;
continue;
} else {
$orderbyInverseParts[] = $orderPart . ' DESC';
}
}
$orderbyInverse = 'ORDER BY ' . implode(', ', $orderbyInverseParts);
}
$sql = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $sql . ') AS inner_tbl';
if ($orderby !== false) {
$sql .= ' ' . $orderbyInverse . ' ';
}
$sql .= ') AS outer_tbl';
if ($orderby !== false) {
$sql .= ' ' . $orderby;
}
}
return $sql;
}
/**
* Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
*
* As a convention, on RDBMS brands that support sequences
* (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
* from the arguments and returns the last id generated by that sequence.
* On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
* returns the last value generated for such a column, and the table name
* argument is disregarded.
*
* Microsoft SQL Server does not support sequences, so the arguments to
* this method are ignored.
*
* @param string $tableName OPTIONAL Name of table.
* @param string $primaryKey OPTIONAL Name of primary key column.
* @return string
* @throws Zend_Db_Adapter_Exception
*/
public function lastInsertId($tableName = null, $primaryKey = null)
{
$sql = 'SELECT SCOPE_IDENTITY()';
return (int)$this->fetchOne($sql);
}
/**
* Retrieve server version in PHP style
* Pdo_Mssql doesn't support getAttribute(PDO::ATTR_SERVER_VERSION)
* @return string
*/
public function getServerVersion()
{
try {
$stmt = $this->query("SELECT SERVERPROPERTY('productversion')");
$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
if (count($result)) {
return $result[0][0];
}
return null;
} catch (PDOException $e) {
return null;
}
}
}
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