544 lines
14 KiB
PHP
544 lines
14 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* CodeIgniter
|
||
|
|
*
|
||
|
|
* An open source application development framework for PHP
|
||
|
|
*
|
||
|
|
* This content is released under the MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014 - 2016, 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 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
|
||
|
|
* @license http://opensource.org/licenses/MIT MIT License
|
||
|
|
* @link https://codeigniter.com
|
||
|
|
* @since Version 2.0.3
|
||
|
|
* @filesource
|
||
|
|
*/
|
||
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SQLSRV 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/user_guide/database/
|
||
|
|
*/
|
||
|
|
class CI_DB_sqlsrv_driver extends CI_DB {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database driver
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public $dbdriver = 'sqlsrv';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Scrollable flag
|
||
|
|
*
|
||
|
|
* Determines what cursor type to use when executing queries.
|
||
|
|
*
|
||
|
|
* FALSE or SQLSRV_CURSOR_FORWARD would increase performance,
|
||
|
|
* but would disable num_rows() (and possibly insert_id())
|
||
|
|
*
|
||
|
|
* @var mixed
|
||
|
|
*/
|
||
|
|
public $scrollable;
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
*
|
||
|
|
* @param array $params
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
public function __construct($params)
|
||
|
|
{
|
||
|
|
parent::__construct($params);
|
||
|
|
|
||
|
|
// This is only supported as of SQLSRV 3.0
|
||
|
|
if ($this->scrollable === NULL)
|
||
|
|
{
|
||
|
|
$this->scrollable = defined('SQLSRV_CURSOR_CLIENT_BUFFERED')
|
||
|
|
? SQLSRV_CURSOR_CLIENT_BUFFERED
|
||
|
|
: FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database connection
|
||
|
|
*
|
||
|
|
* @param bool $pooling
|
||
|
|
* @return resource
|
||
|
|
*/
|
||
|
|
public function db_connect($pooling = FALSE)
|
||
|
|
{
|
||
|
|
$charset = in_array(strtolower($this->char_set), array('utf-8', 'utf8'), TRUE)
|
||
|
|
? 'UTF-8' : SQLSRV_ENC_CHAR;
|
||
|
|
|
||
|
|
$connection = array(
|
||
|
|
'UID' => empty($this->username) ? '' : $this->username,
|
||
|
|
'PWD' => empty($this->password) ? '' : $this->password,
|
||
|
|
'Database' => $this->database,
|
||
|
|
'ConnectionPooling' => ($pooling === TRUE) ? 1 : 0,
|
||
|
|
'CharacterSet' => $charset,
|
||
|
|
'Encrypt' => ($this->encrypt === TRUE) ? 1 : 0,
|
||
|
|
'ReturnDatesAsStrings' => 1
|
||
|
|
);
|
||
|
|
|
||
|
|
// If the username and password are both empty, assume this is a
|
||
|
|
// 'Windows Authentication Mode' connection.
|
||
|
|
if (empty($connection['UID']) && empty($connection['PWD']))
|
||
|
|
{
|
||
|
|
unset($connection['UID'], $connection['PWD']);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (FALSE !== ($this->conn_id = sqlsrv_connect($this->hostname, $connection)))
|
||
|
|
{
|
||
|
|
// 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 = $this->database;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->_execute('USE '.$this->escape_identifiers($database)))
|
||
|
|
{
|
||
|
|
$this->database = $database;
|
||
|
|
$this->data_cache = array();
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Execute the query
|
||
|
|
*
|
||
|
|
* @param string $sql an SQL query
|
||
|
|
* @return resource
|
||
|
|
*/
|
||
|
|
protected function _execute($sql)
|
||
|
|
{
|
||
|
|
return ($this->scrollable === FALSE OR $this->is_write_type($sql))
|
||
|
|
? sqlsrv_query($this->conn_id, $sql)
|
||
|
|
: sqlsrv_query($this->conn_id, $sql, NULL, array('Scrollable' => $this->scrollable));
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Begin Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_begin()
|
||
|
|
{
|
||
|
|
return sqlsrv_begin_transaction($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Commit Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_commit()
|
||
|
|
{
|
||
|
|
return sqlsrv_commit($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rollback Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_rollback()
|
||
|
|
{
|
||
|
|
return sqlsrv_rollback($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Affected Rows
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function affected_rows()
|
||
|
|
{
|
||
|
|
return sqlsrv_rows_affected($this->result_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Insert ID
|
||
|
|
*
|
||
|
|
* Returns the last id created in the Identity column.
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function insert_id()
|
||
|
|
{
|
||
|
|
return $this->query('SELECT SCOPE_IDENTITY() AS insert_id')->row()->insert_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database version number
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function version()
|
||
|
|
{
|
||
|
|
if (isset($this->data_cache['version']))
|
||
|
|
{
|
||
|
|
return $this->data_cache['version'];
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! $this->conn_id OR ($info = sqlsrv_server_info($this->conn_id)) === FALSE)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->data_cache['version'] = $info['SQLServerVersion'];
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* List table query
|
||
|
|
*
|
||
|
|
* Generates a platform-specific query string so that the table names can be fetched
|
||
|
|
*
|
||
|
|
* @param bool
|
||
|
|
* @return string $prefix_limit
|
||
|
|
*/
|
||
|
|
protected function _list_tables($prefix_limit = FALSE)
|
||
|
|
{
|
||
|
|
$sql = 'SELECT '.$this->escape_identifiers('name')
|
||
|
|
.' FROM '.$this->escape_identifiers('sysobjects')
|
||
|
|
.' WHERE '.$this->escape_identifiers('type')." = 'U'";
|
||
|
|
|
||
|
|
if ($prefix_limit === TRUE && $this->dbprefix !== '')
|
||
|
|
{
|
||
|
|
$sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
|
||
|
|
.sprintf($this->_escape_like_str, $this->_escape_like_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 occured.
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function error()
|
||
|
|
{
|
||
|
|
$error = array('code' => '00000', 'message' => '');
|
||
|
|
$sqlsrv_errors = sqlsrv_errors(SQLSRV_ERR_ERRORS);
|
||
|
|
|
||
|
|
if ( ! is_array($sqlsrv_errors))
|
||
|
|
{
|
||
|
|
return $error;
|
||
|
|
}
|
||
|
|
|
||
|
|
$sqlsrv_error = array_shift($sqlsrv_errors);
|
||
|
|
if (isset($sqlsrv_error['SQLSTATE']))
|
||
|
|
{
|
||
|
|
$error['code'] = isset($sqlsrv_error['code']) ? $sqlsrv_error['SQLSTATE'].'/'.$sqlsrv_error['code'] : $sqlsrv_error['SQLSTATE'];
|
||
|
|
}
|
||
|
|
elseif (isset($sqlsrv_error['code']))
|
||
|
|
{
|
||
|
|
$error['code'] = $sqlsrv_error['code'];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($sqlsrv_error['message']))
|
||
|
|
{
|
||
|
|
$error['message'] = $sqlsrv_error['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)
|
||
|
|
{
|
||
|
|
// As of SQL Server 2012 (11.0.*) OFFSET is supported
|
||
|
|
if (version_compare($this->version(), '11', '>='))
|
||
|
|
{
|
||
|
|
// SQL Server OFFSET-FETCH can be used only with the ORDER BY clause
|
||
|
|
empty($this->qb_orderby) && $sql .= ' ORDER BY 1';
|
||
|
|
|
||
|
|
return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY';
|
||
|
|
}
|
||
|
|
|
||
|
|
$limit = $this->qb_offset + $this->qb_limit;
|
||
|
|
|
||
|
|
// An ORDER BY clause is required for ROW_NUMBER() to work
|
||
|
|
if ($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)
|
||
|
|
{
|
||
|
|
$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->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close DB Connection
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function _close()
|
||
|
|
{
|
||
|
|
sqlsrv_close($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|