1
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
5
* An open source application development framework for PHP 5.1.6 or newer
8
* @author ExpressionEngine Dev Team
9
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
10
* @license http://codeigniter.com/user_guide/license.html
11
* @link http://codeigniter.com
16
// ------------------------------------------------------------------------
19
* SQLSRV Database Adapter Class
21
* Note: _DB is an extender class that the app controller
22
* creates dynamically based on whether the active record
23
* class is being used or not.
25
* @package CodeIgniter
28
* @author ExpressionEngine Dev Team
29
* @link http://codeigniter.com/user_guide/database/
31
class CI_DB_sqlsrv_driver extends CI_DB {
33
var $dbdriver = 'sqlsrv';
35
// The character used for escaping
36
var $_escape_char = '';
38
// clause and character used for LIKE escape sequences
39
var $_like_escape_str = " ESCAPE '%s' ";
40
var $_like_escape_chr = '!';
43
* The syntax to count rows is slightly different across different
44
* database engines, so this string appears in each driver and is
45
* used for the count_all() and count_all_results() functions.
47
var $_count_string = "SELECT COUNT(*) AS ";
48
var $_random_keyword = ' ASC'; // not currently supported
51
* Non-persistent database connection
53
* @access private called by the base class
56
function db_connect($pooling = false)
58
// Check for a UTF-8 charset being passed as CI's default 'utf8'.
59
$character_set = (0 === strcasecmp('utf8', $this->char_set)) ? 'UTF-8' : $this->char_set;
62
'UID' => empty($this->username) ? '' : $this->username,
63
'PWD' => empty($this->password) ? '' : $this->password,
64
'Database' => $this->database,
65
'ConnectionPooling' => $pooling ? 1 : 0,
66
'CharacterSet' => $character_set,
67
'ReturnDatesAsStrings' => 1
70
// If the username and password are both empty, assume this is a
71
// 'Windows Authentication Mode' connection.
72
if(empty($connection['UID']) && empty($connection['PWD'])) {
73
unset($connection['UID'], $connection['PWD']);
76
return sqlsrv_connect($this->hostname, $connection);
79
// --------------------------------------------------------------------
82
* Persistent database connection
84
* @access private called by the base class
87
function db_pconnect()
89
$this->db_connect(TRUE);
92
// --------------------------------------------------------------------
97
* Keep / reestablish the db connection if no queries have been
98
* sent for a length of time exceeding the server's idle timeout
105
// not implemented in MSSQL
108
// --------------------------------------------------------------------
111
* Select the database
113
* @access private called by the base class
118
return $this->_execute('USE ' . $this->database);
121
// --------------------------------------------------------------------
124
* Set client character set
131
function db_set_charset($charset, $collation)
133
// @todo - add support if needed
137
// --------------------------------------------------------------------
142
* @access private called by the base class
143
* @param string an SQL query
146
function _execute($sql)
148
$sql = $this->_prep_query($sql);
149
return sqlsrv_query($this->conn_id, $sql, null, array(
150
'Scrollable' => SQLSRV_CURSOR_STATIC,
151
'SendStreamParamsAtExec' => true
155
// --------------------------------------------------------------------
160
* If needed, each database adapter can prep the query string
162
* @access private called by execute()
163
* @param string an SQL query
166
function _prep_query($sql)
171
// --------------------------------------------------------------------
179
function trans_begin($test_mode = FALSE)
181
if ( ! $this->trans_enabled)
186
// When transactions are nested we only begin/commit/rollback the outermost ones
187
if ($this->_trans_depth > 0)
192
// Reset the transaction failure flag.
193
// If the $test_mode flag is set to TRUE transactions will be rolled back
194
// even if the queries produce a successful result.
195
$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
197
return sqlsrv_begin_transaction($this->conn_id);
200
// --------------------------------------------------------------------
208
function trans_commit()
210
if ( ! $this->trans_enabled)
215
// When transactions are nested we only begin/commit/rollback the outermost ones
216
if ($this->_trans_depth > 0)
221
return sqlsrv_commit($this->conn_id);
224
// --------------------------------------------------------------------
227
* Rollback Transaction
232
function trans_rollback()
234
if ( ! $this->trans_enabled)
239
// When transactions are nested we only begin/commit/rollback the outermost ones
240
if ($this->_trans_depth > 0)
245
return sqlsrv_rollback($this->conn_id);
248
// --------------------------------------------------------------------
255
* @param bool whether or not the string will be used in a LIKE condition
258
function escape_str($str, $like = FALSE)
260
// Escape single quotes
261
return str_replace("'", "''", $str);
264
// --------------------------------------------------------------------
272
function affected_rows()
274
return @sqlrv_rows_affected($this->conn_id);
277
// --------------------------------------------------------------------
282
* Returns the last id created in the Identity column.
289
return $this->query('select @@IDENTITY as insert_id')->row('insert_id');
292
// --------------------------------------------------------------------
295
* Parse major version
297
* Grabs the major version number from the
298
* database server version string passed in.
301
* @param string $version
302
* @return int16 major version number
304
function _parse_major_version($version)
306
preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $version, $ver_info);
307
return $ver_info[1]; // return the major version b/c that's all we're interested in.
310
// --------------------------------------------------------------------
313
* Version number query string
320
$info = sqlsrv_server_info($this->conn_id);
321
return sprintf("select '%s' as ver", $info['SQLServerVersion']);
324
// --------------------------------------------------------------------
329
* Generates a platform-specific query string that counts all records in
330
* the specified database
336
function count_all($table = '')
341
$query = $this->query("SELECT COUNT(*) AS numrows FROM " . $this->dbprefix . $table);
343
if ($query->num_rows() == 0)
346
$row = $query->row();
347
$this->_reset_select();
348
return $row->numrows;
351
// --------------------------------------------------------------------
356
* Generates a platform-specific query string so that the table names can be fetched
362
function _list_tables($prefix_limit = FALSE)
364
return "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";
367
// --------------------------------------------------------------------
372
* Generates a platform-specific query string so that the column names can be fetched
375
* @param string the table name
378
function _list_columns($table = '')
380
return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->_escape_table($table)."'";
383
// --------------------------------------------------------------------
388
* Generates a platform-specific query so that the column data can be retrieved
391
* @param string the table name
394
function _field_data($table)
396
return "SELECT TOP 1 * FROM " . $this->_escape_table($table);
399
// --------------------------------------------------------------------
402
* The error message string
407
function _error_message()
409
$error = array_shift(sqlsrv_errors());
410
return !empty($error['message']) ? $error['message'] : null;
413
// --------------------------------------------------------------------
416
* The error message number
421
function _error_number()
423
$error = array_shift(sqlsrv_errors());
424
return isset($error['SQLSTATE']) ? $error['SQLSTATE'] : null;
427
// --------------------------------------------------------------------
432
* This function adds backticks if the table name has a period
433
* in it. Some DBs will get cranky unless periods are escaped
436
* @param string the table name
439
function _escape_table($table)
446
* Escape the SQL Identifiers
448
* This function escapes column and table names
454
function _escape_identifiers($item)
459
// --------------------------------------------------------------------
464
* This function implicitly groups FROM tables so there is no confusion
465
* about operator precedence in harmony with SQL standards
471
function _from_tables($tables)
473
if ( ! is_array($tables))
475
$tables = array($tables);
478
return implode(', ', $tables);
481
// --------------------------------------------------------------------
486
* Generates a platform-specific insert string from the supplied data
489
* @param string the table name
490
* @param array the insert keys
491
* @param array the insert values
494
function _insert($table, $keys, $values)
496
return "INSERT INTO ".$this->_escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
499
// --------------------------------------------------------------------
504
* Generates a platform-specific update string from the supplied data
507
* @param string the table name
508
* @param array the update data
509
* @param array the where clause
510
* @param array the orderby clause
511
* @param array the limit clause
514
function _update($table, $values, $where)
516
foreach($values as $key => $val)
518
$valstr[] = $key." = ".$val;
521
return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where);
524
// --------------------------------------------------------------------
529
* Generates a platform-specific truncate string from the supplied data
530
* If the database does not support the truncate() command
531
* This function maps to "DELETE FROM table"
534
* @param string the table name
537
function _truncate($table)
539
return "TRUNCATE ".$table;
542
// --------------------------------------------------------------------
547
* Generates a platform-specific delete string from the supplied data
550
* @param string the table name
551
* @param array the where clause
552
* @param string the limit clause
555
function _delete($table, $where)
557
return "DELETE FROM ".$this->_escape_table($table)." WHERE ".implode(" ", $where);
560
// --------------------------------------------------------------------
565
* Generates a platform-specific LIMIT clause
568
* @param string the sql query string
569
* @param integer the number of rows to limit the query to
570
* @param integer the offset value
573
function _limit($sql, $limit, $offset)
575
$i = $limit + $offset;
577
return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$i.' ', $sql);
580
// --------------------------------------------------------------------
583
* Close DB Connection
589
function _close($conn_id)
591
@sqlsrv_close($conn_id);
598
/* End of file mssql_driver.php */
599
/* Location: ./system/database/drivers/mssql/mssql_driver.php */
b'\\ No newline at end of file'
added
removed
codeigniter/system/database/drivers/sqlsrv/sqlsrv_driver.php
