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-rw-r--r--system/database/drivers/sqlsrv/sqlsrv_driver.php476
1 files changed, 185 insertions, 291 deletions
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index 6fd52ef70..825c02452 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -21,17 +21,15 @@
* @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
- * @since Version 1.0
+ * @since Version 2.0.3
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* SQLSRV Database Adapter Class
*
* Note: _DB is an extender class that the app controller
- * creates dynamically based on whether the active record
+ * creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
@@ -42,50 +40,61 @@
*/
class CI_DB_sqlsrv_driver extends CI_DB {
- var $dbdriver = 'sqlsrv';
+ public $dbdriver = 'sqlsrv';
// The character used for escaping
- var $_escape_char = '';
+ protected $_escape_char = '"';
// clause and character used for LIKE escape sequences
- var $_like_escape_str = " ESCAPE '%s' ";
- var $_like_escape_chr = '!';
+ protected $_like_escape_str = " ESCAPE '%s' ";
+ protected $_like_escape_chr = '!';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
* used for the count_all() and count_all_results() functions.
*/
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword = ' ASC'; // not currently supported
+ protected $_count_string = 'SELECT COUNT(*) AS ';
+ protected $_random_keyword = ' NEWID()';
+
+ // SQLSRV-specific properties
+ protected $_quoted_identifier = TRUE;
/**
* Non-persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_connect($pooling = false)
+ public function db_connect($pooling = FALSE)
{
// Check for a UTF-8 charset being passed as CI's default 'utf8'.
$character_set = (0 === strcasecmp('utf8', $this->char_set)) ? 'UTF-8' : $this->char_set;
$connection = array(
- 'UID' => empty($this->username) ? '' : $this->username,
- 'PWD' => empty($this->password) ? '' : $this->password,
- 'Database' => $this->database,
- 'ConnectionPooling' => $pooling ? 1 : 0,
+ 'UID' => empty($this->username) ? '' : $this->username,
+ 'PWD' => empty($this->password) ? '' : $this->password,
+ 'Database' => $this->database,
+ 'ConnectionPooling' => $pooling ? 1 : 0,
'CharacterSet' => $character_set,
- 'ReturnDatesAsStrings' => 1
+ 'ReturnDatesAsStrings' => 1
);
-
- // If the username and password are both empty, assume this is a
+
+ // If the username and password are both empty, assume this is a
// 'Windows Authentication Mode' connection.
- if(empty($connection['UID']) && empty($connection['PWD'])) {
+ if (empty($connection['UID']) && empty($connection['PWD']))
+ {
unset($connection['UID'], $connection['PWD']);
}
- return sqlsrv_connect($this->hostname, $connection);
+ $conn_id = sqlsrv_connect($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 $conn_id;
}
// --------------------------------------------------------------------
@@ -93,10 +102,9 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_pconnect()
+ public function db_pconnect()
{
return $this->db_connect(TRUE);
}
@@ -104,46 +112,25 @@ class CI_DB_sqlsrv_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Reconnect
- *
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
- *
- * @access public
- * @return void
- */
- function reconnect()
- {
- // not implemented in MSSQL
- }
-
- // --------------------------------------------------------------------
-
- /**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @param string database name
+ * @return bool
*/
- function db_select()
+ public function db_select($database = '')
{
- return $this->_execute('USE ' . $this->database);
- }
+ if ($database === '')
+ {
+ $database = $this->database;
+ }
- // --------------------------------------------------------------------
+ if ($this->_execute('USE '.$database))
+ {
+ $this->database = $database;
+ return TRUE;
+ }
- /**
- * Set client character set
- *
- * @access public
- * @param string
- * @param string
- * @return resource
- */
- function db_set_charset($charset, $collation)
- {
- // @todo - add support if needed
- return TRUE;
+ return FALSE;
}
// --------------------------------------------------------------------
@@ -151,33 +138,14 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
* @param string an SQL query
* @return resource
*/
- function _execute($sql)
+ protected function _execute($sql)
{
- $sql = $this->_prep_query($sql);
- return sqlsrv_query($this->conn_id, $sql, null, array(
- 'Scrollable' => SQLSRV_CURSOR_STATIC,
- 'SendStreamParamsAtExec' => true
- ));
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
- * @param string an SQL query
- * @return string
- */
- function _prep_query($sql)
- {
- return $sql;
+ return (is_write_type($sql) && stripos($sql, 'INSERT') === FALSE)
+ ? sqlsrv_query($this->conn_id, $sql)
+ : sqlsrv_query($this->conn_id, $sql, NULL, array('Scrollable' => SQLSRV_CURSOR_STATIC));
}
// --------------------------------------------------------------------
@@ -185,18 +153,12 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ public function trans_begin($test_mode = FALSE)
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -204,7 +166,7 @@ class CI_DB_sqlsrv_driver extends CI_DB {
// Reset the transaction failure flag.
// If the $test_mode flag is set to TRUE transactions will be rolled back
// even if the queries produce a successful result.
- $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+ $this->_trans_failure = ($test_mode === TRUE);
return sqlsrv_begin_transaction($this->conn_id);
}
@@ -214,18 +176,12 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ public function trans_commit()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -238,18 +194,12 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ public function trans_rollback()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -262,12 +212,11 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
// Escape single quotes
return str_replace("'", "''", $str);
@@ -278,86 +227,49 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
- return @sqlrv_rows_affected($this->conn_id);
+ return sqlrv_rows_affected($this->result_id);
}
// --------------------------------------------------------------------
/**
- * Insert ID
- *
- * Returns the last id created in the Identity column.
- *
- * @access public
- * @return integer
- */
- function insert_id()
- {
- return $this->query('select @@IDENTITY as insert_id')->row('insert_id');
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Parse major version
- *
- * Grabs the major version number from the
- * database server version string passed in.
- *
- * @access private
- * @param string $version
- * @return int16 major version number
- */
- function _parse_major_version($version)
- {
- preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $version, $ver_info);
- return $ver_info[1]; // return the major version b/c that's all we're interested in.
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Version number query string
- *
- * @access public
- * @return string
- */
- function _version()
+ * Insert ID
+ *
+ * Returns the last id created in the Identity column.
+ *
+ * @return string
+ */
+ public function insert_id()
{
- $info = sqlsrv_server_info($this->conn_id);
- return sprintf("select '%s' as ver", $info['SQLServerVersion']);
+ $query = $this->query('SELECT @@IDENTITY AS insert_id');
+ $query = $query->row();
+ return $query->insert_id;
}
// --------------------------------------------------------------------
/**
- * "Count All" query
+ * Database version number
*
- * Generates a platform-specific query string that counts all records in
- * the specified database
- *
- * @access public
- * @param string
* @return string
*/
- function count_all($table = '')
+ public function version()
{
- if ($table == '')
- return '0';
-
- $query = $this->query("SELECT COUNT(*) AS numrows FROM " . $this->dbprefix . $table);
-
- if ($query->num_rows() == 0)
- return '0';
-
- $row = $query->row();
- $this->_reset_select();
- return $row->numrows;
+ if (isset($this->data_cache['version']))
+ {
+ return $this->data_cache['version'];
+ }
+
+ if (($info = sqlsrv_server_info($this->conn_id)) === FALSE)
+ {
+ return FALSE;
+ }
+
+ return $this->data_cache['version'] = $info['SQLServerVersion'];
}
// --------------------------------------------------------------------
@@ -367,11 +279,10 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ protected function _list_tables($prefix_limit = FALSE)
{
return "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";
}
@@ -383,13 +294,12 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access private
* @param string the table name
* @return string
*/
- function _list_columns($table = '')
+ protected function _list_columns($table = '')
{
- return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->_escape_table($table)."'";
+ return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$table."'";
}
// --------------------------------------------------------------------
@@ -399,113 +309,66 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific query so that the column data can be retrieved
*
- * @access public
* @param string the table name
- * @return object
- */
- function _field_data($table)
- {
- return "SELECT TOP 1 * FROM " . $this->_escape_table($table);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message string
- *
- * @access private
* @return string
*/
- function _error_message()
+ protected function _field_data($table)
{
- $error = array_shift(sqlsrv_errors());
- return !empty($error['message']) ? $error['message'] : null;
+ return 'SELECT TOP 1 * FROM '.$table;
}
// --------------------------------------------------------------------
/**
- * The error message number
+ * Error
*
- * @access private
- * @return integer
- */
- function _error_number()
- {
- $error = array_shift(sqlsrv_errors());
- return isset($error['SQLSTATE']) ? $error['SQLSTATE'] : null;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Escape Table Name
- *
- * This function adds backticks if the table name has a period
- * in it. Some DBs will get cranky unless periods are escaped
+ * Returns an array containing code and message of the last
+ * database error that has occured.
*
- * @access private
- * @param string the table name
- * @return string
+ * @return array
*/
- function _escape_table($table)
+ public function error()
{
- return $table;
- }
+ $error = array('code' => '00000', 'message' => '');
+ $sqlsrv_errors = sqlsrv_errors(SQLSRV_ERR_ERRORS);
+ if ( ! is_array($sqlsrv_errors))
+ {
+ return $error;
+ }
- /**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
- *
- * @access private
- * @param string
- * @return string
- */
- function _escape_identifiers($item)
- {
- return $item;
- }
-
- // --------------------------------------------------------------------
+ $sqlsrv_error = array_shift($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'] = $sqlsrv_error['code'];
+ }
- /**
- * From Tables
- *
- * This function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
- *
- * @access public
- * @param type
- * @return type
- */
- function _from_tables($tables)
- {
- if ( ! is_array($tables))
+ if (isset($sqlsrv_error['message']))
{
- $tables = array($tables);
+ $error['message'] = $sqlsrv_error['message'];
}
- return implode(', ', $tables);
+ return $error;
}
// --------------------------------------------------------------------
/**
- * Insert statement
+ * From Tables
*
- * Generates a platform-specific insert string from the supplied data
+ * This function implicitly groups FROM tables so there is no confusion
+ * about operator precedence in harmony with SQL standards
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
+ * @param array
* @return string
*/
- function _insert($table, $keys, $values)
- {
- return "INSERT INTO ".$this->_escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ protected function _from_tables($tables)
+ {
+ return is_array($tables) ? implode(', ', $tables) : $tables;
}
// --------------------------------------------------------------------
@@ -515,40 +378,47 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
+ * @param array the orderby clause (ignored)
+ * @param array the limit clause (ignored)
+ * @param array the like clause
* @return string
*/
- function _update($table, $values, $where)
+ protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
{
- foreach($values as $key => $val)
+ foreach ($values as $key => $val)
{
- $valstr[] = $key." = ".$val;
+ $valstr[] = $key.' = '.$val;
}
-
- return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where);
+
+ $where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+ if ( ! empty($like))
+ {
+ $where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+ }
+
+ return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
}
-
+
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
*
- * @access public
+ * If the database does not support the truncate() command,
+ * then this method maps to 'DELETE FROM table'
+ *
* @param string the table name
* @return string
*/
- function _truncate($table)
+ protected function _truncate($table)
{
- return "TRUNCATE ".$table;
+ return 'TRUNCATE TABLE '.$table;
}
// --------------------------------------------------------------------
@@ -558,15 +428,24 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific delete string from the supplied data
*
- * @access public
* @param string the table name
* @param array the where clause
+ * @param array the like clause
* @param string the limit clause
* @return string
*/
- function _delete($table, $where)
+ protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
- return "DELETE FROM ".$this->_escape_table($table)." WHERE ".implode(" ", $where);
+ $conditions = array();
+
+ empty($where) OR $conditions[] = implode(' ', $where);
+ empty($like) OR $conditions[] = implode(' ', $like);
+
+ $conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+ return ($limit)
+ ? 'WITH ci_delete AS (SELECT TOP '.$limit.' * FROM '.$table.$conditions.') DELETE FROM ci_delete'
+ : 'DELETE FROM '.$table.$conditions;
}
// --------------------------------------------------------------------
@@ -576,17 +455,36 @@ class CI_DB_sqlsrv_driver extends CI_DB {
*
* Generates a platform-specific LIMIT clause
*
- * @access public
* @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param int the number of rows to limit the query to
+ * @param int the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _limit($sql, $limit, $offset)
{
- $i = $limit + $offset;
-
- return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$i.' ', $sql);
+ // As of SQL Server 2012 (11.0.*) OFFSET is supported
+ if (version_compare($this->version(), '11', '>='))
+ {
+ return $sql.' OFFSET '.(int) $offset.' ROWS FETCH NEXT '.(int) $limit.' ROWS ONLY';
+ }
+
+ $limit = $offset + $limit;
+
+ // An ORDER BY clause is required for ROW_NUMBER() to work
+ if ($offset && ! empty($this->qb_orderby))
+ {
+ $orderby = 'ORDER BY '.implode(', ', $this->qb_orderby);
+
+ // We have to strip the ORDER BY clause
+ $sql = trim(substr($sql, 0, strrpos($sql, 'ORDER BY '.$orderby)));
+
+ return 'SELECT '.(count($this->qb_select) === 0 ? '*' : implode(', ', $this->qb_select))." FROM (\n"
+ .preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.$orderby.') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
+ ."\n) ".$this->escape_identifiers('CI_subquery')
+ ."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.((int) $offset + 1).' AND '.$limit;
+ }
+
+ return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
}
// --------------------------------------------------------------------
@@ -594,18 +492,14 @@ class CI_DB_sqlsrv_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
- * @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close()
{
- @sqlsrv_close($conn_id);
+ @sqlsrv_close($this->conn_id);
}
}
-
-
-/* End of file mssql_driver.php */
-/* Location: ./system/database/drivers/mssql/mssql_driver.php */ \ No newline at end of file
+/* End of file sqlsrv_driver.php */
+/* Location: ./system/database/drivers/sqlsrv/sqlsrv_driver.php */ \ No newline at end of file
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-12-23 20:00:29 +0100