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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
*/
/**
* @see Zend_Db_Adapter_Abstract
*/
require_once 'Zend/Db/Adapter/Abstract.php';
/**
* @see Zend_Db_Statement_Sqlsrv
*/
require_once 'Zend/Db/Statement/Sqlsrv.php';
/**
* @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_Sqlsrv extends Zend_Db_Adapter_Abstract
{
/**
* User-provided configuration.
*
* Basic keys are:
*
* username => (string) Connect to the database as this username.
* password => (string) Password associated with the username.
* dbname => The name of the local SQL Server instance
*
* @var array
*/
protected $_config = array(
'dbname' => null,
'username' => null,
'password' => null,
);
/**
* Last insert id from INSERT query
*
* @var int
*/
protected $_lastInsertId;
/**
* Query used to fetch last insert id
*
* @var string
*/
protected $_lastInsertSQL = 'SELECT SCOPE_IDENTITY() as Current_Identity';
/**
* 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,
);
/**
* Default class name for a DB statement.
*
* @var string
*/
protected $_defaultStmtClass = 'Zend_Db_Statement_Sqlsrv';
/**
* Creates a connection resource.
*
* @return void
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
protected function _connect()
{
if (is_resource($this->_connection)) {
// connection already exists
return;
}
if (!extension_loaded('sqlsrv')) {
/**
* @see Zend_Db_Adapter_Sqlsrv_Exception
*/
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception('The Sqlsrv extension is required for this adapter but the extension is not loaded');
}
$serverName = $this->_config['host'];
if (isset($this->_config['port'])) {
$port = (integer) $this->_config['port'];
$serverName .= ', ' . $port;
}
$connectionInfo = array(
'Database' => $this->_config['dbname'],
);
if (isset($this->_config['username']) && isset($this->_config['password']))
{
$connectionInfo += array(
'UID' => $this->_config['username'],
'PWD' => $this->_config['password'],
);
}
// else - windows authentication
if (!empty($this->_config['driver_options'])) {
foreach ($this->_config['driver_options'] as $option => $value) {
// A value may be a constant.
if (is_string($value)) {
$constantValue = @constant(strtoupper($value));
if ($constantValue === null) {
$connectionInfo[$option] = $value;
} else {
$connectionInfo[$option] = $constantValue;
}
}
}
}
$this->_connection = sqlsrv_connect($serverName, $connectionInfo);
if (!$this->_connection) {
/**
* @see Zend_Db_Adapter_Sqlsrv_Exception
*/
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception(sqlsrv_errors());
}
}
/**
* Check for config options that are mandatory.
* Throw exceptions if any are missing.
*
* @param array $config
* @throws Zend_Db_Adapter_Exception
*/
protected function _checkRequiredOptions(array $config)
{
// we need at least a dbname
if (! array_key_exists('dbname', $config)) {
/** @see Zend_Db_Adapter_Exception */
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'dbname' that names the database instance");
}
if (! array_key_exists('password', $config) && array_key_exists('username', $config)) {
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'password' for login credentials.
If Windows Authentication is desired, both keys 'username' and 'password' should be ommited from config.");
}
if (array_key_exists('password', $config) && !array_key_exists('username', $config)) {
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'username' for login credentials.
If Windows Authentication is desired, both keys 'username' and 'password' should be ommited from config.");
}
}
/**
* Set the transaction isoltion level.
*
* @param integer|null $level A fetch mode from SQLSRV_TXN_*.
* @return true
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
public function setTransactionIsolationLevel($level = null)
{
$this->_connect();
$sql = null;
// Default transaction level in sql server
if ($level === null)
{
$level = SQLSRV_TXN_READ_COMMITTED;
}
switch ($level) {
case SQLSRV_TXN_READ_UNCOMMITTED:
$sql = "READ UNCOMMITTED";
break;
case SQLSRV_TXN_READ_COMMITTED:
$sql = "READ COMMITTED";
break;
case SQLSRV_TXN_REPEATABLE_READ:
$sql = "REPEATABLE READ";
break;
case SQLSRV_TXN_SNAPSHOT:
$sql = "SNAPSHOT";
break;
case SQLSRV_TXN_SERIALIZABLE:
$sql = "SERIALIZABLE";
break;
default:
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception("Invalid transaction isolation level mode '$level' specified");
}
if (!sqlsrv_query($this->_connection, "SET TRANSACTION ISOLATION LEVEL $sql;")) {
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception("Transaction cannot be changed to '$level'");
}
return true;
}
/**
* Test if a connection is active
*
* @return boolean
*/
public function isConnected()
{
return (is_resource($this->_connection)
&& (get_resource_type($this->_connection) == 'SQL Server Connection')
);
}
/**
* Force the connection to close.
*
* @return void
*/
public function closeConnection()
{
if ($this->isConnected()) {
sqlsrv_close($this->_connection);
}
$this->_connection = null;
}
/**
* Returns an SQL statement for preparation.
*
* @param string $sql The SQL statement with placeholders.
* @return Zend_Db_Statement_Sqlsrv
*/
public function prepare($sql)
{
$this->_connect();
$stmtClass = $this->_defaultStmtClass;
if (!class_exists($stmtClass)) {
/**
* @see Zend_Loader
*/
require_once 'Zend/Loader.php';
Zend_Loader::loadClass($stmtClass);
}
$stmt = new $stmtClass($this, $sql);
$stmt->setFetchMode($this->_fetchMode);
return $stmt;
}
/**
* Quote a raw string.
*
* @param string $value Raw string
* @return string Quoted string
*/
protected function _quote($value)
{
if (is_int($value)) {
return $value;
} elseif (is_float($value)) {
return sprintf('%F', $value);
}
return "'" . str_replace("'", "''", $value) . "'";
}
/**
* 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.
*
* @param string $tableName OPTIONAL Name of table.
* @param string $primaryKey OPTIONAL Name of primary key column.
* @return string
*/
public function lastInsertId($tableName = null, $primaryKey = null)
{
if ($tableName) {
$tableName = $this->quote($tableName);
$sql = 'SELECT IDENT_CURRENT (' . $tableName . ') as Current_Identity';
return (string) $this->fetchOne($sql);
}
if ($this->_lastInsertId > 0) {
return (string) $this->_lastInsertId;
}
$sql = $this->_lastInsertSQL;
return (string) $this->fetchOne($sql);
}
/**
* Inserts a table row with specified data.
*
* @param mixed $table The table to insert data into.
* @param array $bind Column-value pairs.
* @return int The number of affected rows.
*/
public function insert($table, array $bind)
{
// extract and quote col names from the array keys
$cols = array();
$vals = array();
foreach ($bind as $col => $val) {
$cols[] = $this->quoteIdentifier($col, true);
if ($val instanceof Zend_Db_Expr) {
$vals[] = $val->__toString();
unset($bind[$col]);
} else {
$vals[] = '?';
}
}
// build the statement
$sql = "INSERT INTO "
. $this->quoteIdentifier($table, true)
. ' (' . implode(', ', $cols) . ') '
. 'VALUES (' . implode(', ', $vals) . ')'
. ' ' . $this->_lastInsertSQL;
// execute the statement and return the number of affected rows
$stmt = $this->query($sql, array_values($bind));
$result = $stmt->rowCount();
$stmt->nextRowset();
$this->_lastInsertId = $stmt->fetchColumn();
return $result;
}
/**
* Returns a list of the tables in the database.
*
* @return array
*/
public function listTables()
{
$this->_connect();
$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 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
* IDENTITY => integer; true if column is auto-generated with unique values
*
* @todo Discover integer unsigned property.
*
* @param string $tableName
* @param string $schemaName OPTIONAL
* @return array
*/
public function describeTable($tableName, $schemaName = null)
{
/**
* Discover metadata information about this table.
*/
$sql = "exec sp_columns @table_name = " . $this->quoteIdentifier($tableName, true);
$stmt = $this->query($sql);
$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
$owner = 1;
$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.
*/
$tableOwner = $result[0][$owner];
$sql = "exec sp_pkeys @table_owner = " . $tableOwner
. ", @table_name = " . $this->quoteIdentifier($tableName, true);
$stmt = $this->query($sql);
$primaryKeysResult = $stmt->fetchAll(Zend_Db::FETCH_NUM);
$primaryKeyColumn = array();
// Per http://msdn.microsoft.com/en-us/library/ms189813.aspx,
// results from sp_keys stored procedure are:
// 0=TABLE_QUALIFIER 1=TABLE_OWNER 2=TABLE_NAME 3=COLUMN_NAME 4=KEY_SEQ 5=PK_NAME
$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 $desc;
}
/**
* Leave autocommit mode and begin a transaction.
*
* @return void
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
protected function _beginTransaction()
{
if (!sqlsrv_begin_transaction($this->_connection)) {
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception(sqlsrv_errors());
}
}
/**
* Commit a transaction and return to autocommit mode.
*
* @return void
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
protected function _commit()
{
if (!sqlsrv_commit($this->_connection)) {
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception(sqlsrv_errors());
}
}
/**
* Roll back a transaction and return to autocommit mode.
*
* @return void
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
protected function _rollBack()
{
if (!sqlsrv_rollback($this->_connection)) {
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception(sqlsrv_errors());
}
}
/**
* Set the fetch mode.
*
* @todo Support FETCH_CLASS and FETCH_INTO.
*
* @param integer $mode A fetch mode.
* @return void
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
public function setFetchMode($mode)
{
switch ($mode) {
case Zend_Db::FETCH_NUM: // seq array
case Zend_Db::FETCH_ASSOC: // assoc array
case Zend_Db::FETCH_BOTH: // seq+assoc array
case Zend_Db::FETCH_OBJ: // object
$this->_fetchMode = $mode;
break;
case Zend_Db::FETCH_BOUND: // bound to PHP variable
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception('FETCH_BOUND is not supported yet');
break;
default:
require_once 'Zend/Db/Adapter/Sqlsrv/Exception.php';
throw new Zend_Db_Adapter_Sqlsrv_Exception("Invalid fetch mode '$mode' specified");
break;
}
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
*
* @param string $sql
* @param integer $count
* @param integer $offset OPTIONAL
* @return string
* @throws Zend_Db_Adapter_Sqlsrv_Exception
*/
public function limit($sql, $count, $offset = 0)
{
$count = intval($count);
if ($count <= 0) {
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("LIMIT argument count=$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");
}
$orderby = stristr($sql, 'ORDER BY');
if ($orderby !== false) {
$sort = (stripos($orderby, ' desc') !== false) ? 'desc' : 'asc';
$order = str_ireplace('ORDER BY', '', $orderby);
$order = trim(preg_replace('/\bASC\b|\bDESC\b/i', '', $order));
}
$sql = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($count+$offset) . ' ', $sql);
$sql = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $sql . ') AS inner_tbl';
if ($orderby !== false) {
$sql .= ' ORDER BY ' . $order . ' ';
$sql .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC';
}
$sql .= ') AS outer_tbl';
if ($orderby !== false) {
$sql .= ' ORDER BY ' . $order . ' ' . $sort;
}
return $sql;
}
/**
* Check if the adapter supports real SQL parameters.
*
* @param string $type 'positional' or 'named'
* @return bool
*/
public function supportsParameters($type)
{
if ($type == 'positional') {
return true;
}
// if its 'named' or anything else
return false;
}
/**
* Retrieve server version in PHP style
*
* @return string
*/
public function getServerVersion()
{
$this->_connect();
$version = sqlsrv_client_info($this->_connection);
if ($version !== false) {
return $version['DriverVer'];
}
return null;
}
}
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