506 lines
13 KiB
PHP
506 lines
13 KiB
PHP
<?php
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP
|
|
*
|
|
* This content is released under the MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* @package CodeIgniter
|
|
* @author EllisLab Dev Team
|
|
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
|
|
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
|
|
* @license https://opensource.org/licenses/MIT MIT License
|
|
* @link https://codeigniter.com
|
|
* @since Version 1.3.0
|
|
* @filesource
|
|
*/
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
|
|
|
/**
|
|
* MS SQL Database Adapter Class
|
|
*
|
|
* Note: _DB is an extender class that the app controller
|
|
* creates dynamically based on whether the query builder
|
|
* class is being used or not.
|
|
*
|
|
* @package CodeIgniter
|
|
* @subpackage Drivers
|
|
* @category Database
|
|
* @author EllisLab Dev Team
|
|
* @link https://codeigniter.com/userguide3/database/
|
|
*/
|
|
class CI_DB_mssql_driver extends CI_DB {
|
|
|
|
/**
|
|
* Database driver
|
|
*
|
|
* @var string
|
|
*/
|
|
public $dbdriver = 'mssql';
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* ORDER BY random keyword
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $_random_keyword = array('NEWID()', 'RAND(%d)');
|
|
|
|
/**
|
|
* Quoted identifier flag
|
|
*
|
|
* Whether to use SQL-92 standard quoted identifier
|
|
* (double quotes) or brackets for identifier escaping.
|
|
*
|
|
* @var bool
|
|
*/
|
|
protected $_quoted_identifier = TRUE;
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Class constructor
|
|
*
|
|
* Appends the port number to the hostname, if needed.
|
|
*
|
|
* @param array $params
|
|
* @return void
|
|
*/
|
|
public function __construct($params)
|
|
{
|
|
parent::__construct($params);
|
|
|
|
if ( ! empty($this->port))
|
|
{
|
|
$this->hostname .= (DIRECTORY_SEPARATOR === '\\' ? ',' : ':').$this->port;
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Non-persistent database connection
|
|
*
|
|
* @param bool $persistent
|
|
* @return resource
|
|
*/
|
|
public function db_connect($persistent = FALSE)
|
|
{
|
|
ini_set('mssql.charset', $this->char_set);
|
|
$this->conn_id = ($persistent)
|
|
? mssql_pconnect($this->hostname, $this->username, $this->password)
|
|
: mssql_connect($this->hostname, $this->username, $this->password);
|
|
|
|
if ( ! $this->conn_id)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
|
|
// Select the DB... assuming a database name is specified in the config file
|
|
if ($this->database !== '' && ! $this->db_select())
|
|
{
|
|
log_message('error', 'Unable to select database: '.$this->database);
|
|
|
|
return ($this->db_debug === TRUE)
|
|
? $this->display_error('db_unable_to_select', $this->database)
|
|
: FALSE;
|
|
}
|
|
|
|
// Determine how identifiers are escaped
|
|
$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
|
|
$query = $query->row_array();
|
|
$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
|
|
$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
|
|
|
|
return $this->conn_id;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Select the database
|
|
*
|
|
* @param string $database
|
|
* @return bool
|
|
*/
|
|
public function db_select($database = '')
|
|
{
|
|
if ($database === '')
|
|
{
|
|
$database = $this->database;
|
|
}
|
|
|
|
// Note: Escaping is required in the event that the DB name
|
|
// contains reserved characters.
|
|
if (mssql_select_db('['.$database.']', $this->conn_id))
|
|
{
|
|
$this->database = $database;
|
|
$this->data_cache = array();
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Execute the query
|
|
*
|
|
* @param string $sql an SQL query
|
|
* @return mixed resource if rows are returned, bool otherwise
|
|
*/
|
|
protected function _execute($sql)
|
|
{
|
|
return mssql_query($sql, $this->conn_id);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Begin Transaction
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected function _trans_begin()
|
|
{
|
|
return $this->simple_query('BEGIN TRAN');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Commit Transaction
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected function _trans_commit()
|
|
{
|
|
return $this->simple_query('COMMIT TRAN');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Rollback Transaction
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected function _trans_rollback()
|
|
{
|
|
return $this->simple_query('ROLLBACK TRAN');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Affected Rows
|
|
*
|
|
* @return int
|
|
*/
|
|
public function affected_rows()
|
|
{
|
|
return mssql_rows_affected($this->conn_id);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert ID
|
|
*
|
|
* Returns the last id created in the Identity column.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function insert_id()
|
|
{
|
|
$query = version_compare($this->version(), '8', '>=')
|
|
? 'SELECT SCOPE_IDENTITY() AS last_id'
|
|
: 'SELECT @@IDENTITY AS last_id';
|
|
|
|
$query = $this->query($query);
|
|
$query = $query->row();
|
|
return $query->last_id;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Version number query string
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function _version()
|
|
{
|
|
return "SELECT SERVERPROPERTY('ProductVersion') AS ver";
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* List table query
|
|
*
|
|
* Generates a platform-specific query string so that the table names can be fetched
|
|
*
|
|
* @param bool $prefix_limit
|
|
* @return string
|
|
*/
|
|
protected function _list_tables($prefix_limit = FALSE)
|
|
{
|
|
$sql = 'SELECT '.$this->escape_identifiers('name')
|
|
.' FROM '.$this->escape_identifiers('sysobjects')
|
|
.' WHERE '.$this->escape_identifiers('type')." = 'U'";
|
|
|
|
if ($prefix_limit !== FALSE && $this->dbprefix !== '')
|
|
{
|
|
$sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
|
|
.sprintf($this->_like_escape_str, $this->_like_escape_chr);
|
|
}
|
|
|
|
return $sql.' ORDER BY '.$this->escape_identifiers('name');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* List column query
|
|
*
|
|
* Generates a platform-specific query string so that the column names can be fetched
|
|
*
|
|
* @param string $table
|
|
* @return string
|
|
*/
|
|
protected function _list_columns($table = '')
|
|
{
|
|
return 'SELECT COLUMN_NAME
|
|
FROM INFORMATION_SCHEMA.Columns
|
|
WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns an object with field data
|
|
*
|
|
* @param string $table
|
|
* @return array
|
|
*/
|
|
public function field_data($table)
|
|
{
|
|
$sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, COLUMN_DEFAULT
|
|
FROM INFORMATION_SCHEMA.Columns
|
|
WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
|
|
|
|
if (($query = $this->query($sql)) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
$query = $query->result_object();
|
|
|
|
$retval = array();
|
|
for ($i = 0, $c = count($query); $i < $c; $i++)
|
|
{
|
|
$retval[$i] = new stdClass();
|
|
$retval[$i]->name = $query[$i]->COLUMN_NAME;
|
|
$retval[$i]->type = $query[$i]->DATA_TYPE;
|
|
$retval[$i]->max_length = ($query[$i]->CHARACTER_MAXIMUM_LENGTH > 0) ? $query[$i]->CHARACTER_MAXIMUM_LENGTH : $query[$i]->NUMERIC_PRECISION;
|
|
$retval[$i]->default = $query[$i]->COLUMN_DEFAULT;
|
|
}
|
|
|
|
return $retval;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Error
|
|
*
|
|
* Returns an array containing code and message of the last
|
|
* database error that has occurred.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function error()
|
|
{
|
|
// We need this because the error info is discarded by the
|
|
// server the first time you request it, and query() already
|
|
// calls error() once for logging purposes when a query fails.
|
|
static $error = array('code' => 0, 'message' => NULL);
|
|
|
|
$message = mssql_get_last_message();
|
|
if ( ! empty($message))
|
|
{
|
|
$error['code'] = $this->query('SELECT @@ERROR AS code')->row()->code;
|
|
$error['message'] = $message;
|
|
}
|
|
|
|
return $error;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Update statement
|
|
*
|
|
* Generates a platform-specific update string from the supplied data
|
|
*
|
|
* @param string $table
|
|
* @param array $values
|
|
* @return string
|
|
*/
|
|
protected function _update($table, $values)
|
|
{
|
|
$this->qb_limit = FALSE;
|
|
$this->qb_orderby = array();
|
|
return parent::_update($table, $values);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Truncate statement
|
|
*
|
|
* Generates a platform-specific truncate string from the supplied data
|
|
*
|
|
* If the database does not support the TRUNCATE statement,
|
|
* then this method maps to 'DELETE FROM table'
|
|
*
|
|
* @param string $table
|
|
* @return string
|
|
*/
|
|
protected function _truncate($table)
|
|
{
|
|
return 'TRUNCATE TABLE '.$table;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Delete statement
|
|
*
|
|
* Generates a platform-specific delete string from the supplied data
|
|
*
|
|
* @param string $table
|
|
* @return string
|
|
*/
|
|
protected function _delete($table)
|
|
{
|
|
if ($this->qb_limit)
|
|
{
|
|
return 'WITH ci_delete AS (SELECT TOP '.$this->qb_limit.' * FROM '.$table.$this->_compile_wh('qb_where').') DELETE FROM ci_delete';
|
|
}
|
|
|
|
return parent::_delete($table);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* LIMIT
|
|
*
|
|
* Generates a platform-specific LIMIT clause
|
|
*
|
|
* @param string $sql SQL Query
|
|
* @return string
|
|
*/
|
|
protected function _limit($sql)
|
|
{
|
|
$limit = $this->qb_offset + $this->qb_limit;
|
|
|
|
// As of SQL Server 2005 (9.0.*) ROW_NUMBER() is supported,
|
|
// however an ORDER BY clause is required for it to work
|
|
if (version_compare($this->version(), '9', '>=') && $this->qb_offset && ! empty($this->qb_orderby))
|
|
{
|
|
$orderby = $this->_compile_order_by();
|
|
|
|
// We have to strip the ORDER BY clause
|
|
$sql = trim(substr($sql, 0, strrpos($sql, $orderby)));
|
|
|
|
// Get the fields to select from our subquery, so that we can avoid CI_rownum appearing in the actual results
|
|
if (count($this->qb_select) === 0 OR strpos(implode(',', $this->qb_select), '*') !== FALSE)
|
|
{
|
|
$select = '*'; // Inevitable
|
|
}
|
|
else
|
|
{
|
|
// Use only field names and their aliases, everything else is out of our scope.
|
|
$select = array();
|
|
$field_regexp = ($this->_quoted_identifier)
|
|
? '("[^\"]+")' : '(\[[^\]]+\])';
|
|
for ($i = 0, $c = count($this->qb_select); $i < $c; $i++)
|
|
{
|
|
$select[] = preg_match('/(?:\s|\.)'.$field_regexp.'$/i', $this->qb_select[$i], $m)
|
|
? $m[1] : $this->qb_select[$i];
|
|
}
|
|
$select = implode(', ', $select);
|
|
}
|
|
|
|
return 'SELECT '.$select." FROM (\n\n"
|
|
.preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.trim($orderby).') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
|
|
."\n\n) ".$this->escape_identifiers('CI_subquery')
|
|
."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.($this->qb_offset + 1).' AND '.$limit;
|
|
}
|
|
|
|
return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert batch statement
|
|
*
|
|
* Generates a platform-specific insert string from the supplied data.
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $keys INSERT keys
|
|
* @param array $values INSERT values
|
|
* @return string|bool
|
|
*/
|
|
protected function _insert_batch($table, $keys, $values)
|
|
{
|
|
// Multiple-value inserts are only supported as of SQL Server 2008
|
|
if (version_compare($this->version(), '10', '>='))
|
|
{
|
|
return parent::_insert_batch($table, $keys, $values);
|
|
}
|
|
|
|
return ($this->db_debug) ? $this->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Close DB Connection
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _close()
|
|
{
|
|
mssql_close($this->conn_id);
|
|
}
|
|
|
|
}
|