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-rw-r--r--system/database/drivers/mssql/mssql_driver.php350
1 files changed, 104 insertions, 246 deletions
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 2a1098932..90609a84d 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_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:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* MS SQL Database Adapter Class
*
@@ -42,30 +40,29 @@
*/
class CI_DB_mssql_driver extends CI_DB {
- var $dbdriver = 'mssql';
+ public $dbdriver = 'mssql';
// 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.
+ * used for the count_all() and count_all_results() methods.
*/
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword = ' ASC'; // not currently supported
+ protected $_count_string = 'SELECT COUNT(*) AS ';
+ protected $_random_keyword = ' NEWID()';
/**
* Non-persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_connect()
+ public function db_connect()
{
if ($this->port != '')
{
@@ -80,10 +77,9 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_pconnect()
+ public function db_pconnect()
{
if ($this->port != '')
{
@@ -96,48 +92,27 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Reconnect
- *
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
- *
- * @access public
- * @return void
- */
- function reconnect()
- {
- // not implemented in MSSQL
- }
-
- // --------------------------------------------------------------------
-
- /**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @param string database name
+ * @return bool
*/
- function db_select()
+ public function db_select($database = '')
{
+ if ($database === '')
+ {
+ $database = $this->database;
+ }
+
// Note: The brackets are required in the event that the DB name
// contains reserved characters
- return @mssql_select_db('['.$this->database.']', $this->conn_id);
- }
-
- // --------------------------------------------------------------------
+ if (@mssql_select_db('['.$database.']', $this->conn_id))
+ {
+ $this->database = $database;
+ return TRUE;
+ }
- /**
- * Set client character set
- *
- * @access public
- * @param string
- * @param string
- * @return resource
- */
- function db_set_charset($charset, $collation)
- {
- // @todo - add support if needed
- return TRUE;
+ return FALSE;
}
// --------------------------------------------------------------------
@@ -145,41 +120,22 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
* @param string an SQL query
* @return resource
*/
- function _execute($sql)
+ protected function _execute($sql)
{
- $sql = $this->_prep_query($sql);
return @mssql_query($sql, $this->conn_id);
}
// --------------------------------------------------------------------
/**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
- * @param string an SQL query
- * @return string
- */
- function _prep_query($sql)
- {
- return $sql;
- }
-
- // --------------------------------------------------------------------
-
- /**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ public function trans_begin($test_mode = FALSE)
{
if ( ! $this->trans_enabled)
{
@@ -206,10 +162,9 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ public function trans_commit()
{
if ( ! $this->trans_enabled)
{
@@ -231,10 +186,9 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ public function trans_rollback()
{
if ( ! $this->trans_enabled)
{
@@ -256,12 +210,11 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
@@ -294,10 +247,9 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
return @mssql_rows_affected($this->conn_id);
}
@@ -305,14 +257,13 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Insert ID
- *
- * Returns the last id created in the Identity column.
- *
- * @access public
- * @return integer
- */
- function insert_id()
+ * Insert ID
+ *
+ * Returns the last id created in the Identity column.
+ *
+ * @return string
+ */
+ public function insert_id()
{
$ver = self::_parse_major_version($this->version());
$sql = ($ver >= 8 ? "SELECT SCOPE_IDENTITY() AS last_id" : "SELECT @@IDENTITY AS last_id");
@@ -324,16 +275,15 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * 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)
+ * Parse major version
+ *
+ * Grabs the major version number from the
+ * database server version string passed in.
+ *
+ * @param string $version
+ * @return int major version number
+ */
+ protected function _parse_major_version($version)
{
preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $version, $ver_info);
return $ver_info[1]; // return the major version b/c that's all we're interested in.
@@ -342,14 +292,13 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Version number query string
- *
- * @access public
- * @return string
- */
- function _version()
+ * Version number query string
+ *
+ * @return string
+ */
+ protected function _version()
{
- return "SELECT @@VERSION AS ver";
+ return 'SELECT @@VERSION AS ver';
}
// --------------------------------------------------------------------
@@ -360,19 +309,17 @@ class CI_DB_mssql_driver extends CI_DB {
* Generates a platform-specific query string that counts all records in
* the specified database
*
- * @access public
* @param string
* @return string
*/
- function count_all($table = '')
+ public function count_all($table = '')
{
if ($table == '')
{
return 0;
}
- $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
-
+ $query = $this->query($this->_count_string.$this->protect_identifiers('numrows').' FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
if ($query->num_rows() == 0)
{
return 0;
@@ -390,11 +337,10 @@ class CI_DB_mssql_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)
{
$sql = "SELECT name FROM sysobjects WHERE type = 'U' ORDER BY name";
@@ -415,11 +361,10 @@ class CI_DB_mssql_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access private
* @param string the table name
* @return string
*/
- function _list_columns($table = '')
+ protected function _list_columns($table = '')
{
return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$table."'";
}
@@ -431,82 +376,29 @@ class CI_DB_mssql_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($table)
- {
- return "SELECT TOP 1 * FROM ".$table;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message string
- *
- * @access private
* @return string
*/
- function _error_message()
+ protected function _field_data($table)
{
- return mssql_get_last_message();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message number
- *
- * @access private
- * @return integer
- */
- function _error_number()
- {
- // Are error numbers supported?
- return '';
+ return "SELECT TOP 1 * FROM ".$table;
}
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
+ * Error
*
- * This function escapes column and table names
+ * Returns an array containing code and message of the last
+ * database error that has occured.
*
- * @access private
- * @param string
- * @return string
+ * @return array
*/
- function _escape_identifiers($item)
+ public function error()
{
- if ($this->_escape_char == '')
- {
- return $item;
- }
-
- foreach ($this->_reserved_identifiers as $id)
- {
- if (strpos($item, '.'.$id) !== FALSE)
- {
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
- }
-
- if (strpos($item, '.') !== FALSE)
- {
- $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
- }
- else
- {
- $str = $this->_escape_char.$item.$this->_escape_char;
- }
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ $query = $this->query('SELECT @@ERROR AS code');
+ $query = $query->row();
+ return array('code' => $query->code, 'message' => mssql_get_last_message());
}
// --------------------------------------------------------------------
@@ -517,11 +409,10 @@ class CI_DB_mssql_driver extends CI_DB {
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
- * @access public
- * @param type
- * @return type
+ * @param array
+ * @return string
*/
- function _from_tables($tables)
+ protected function _from_tables($tables)
{
if ( ! is_array($tables))
{
@@ -534,73 +425,51 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _insert($table, $keys, $values)
- {
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
- /**
* Update statement
*
* Generates a platform-specific update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
+ * @param array the orderby clause (ignored)
+ * @param array the limit clause (ignored)
+ * @param array the like clause
* @return string
*/
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ protected function _update($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;
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
+ $where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
- $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
- $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
- $sql .= $orderby.$limit;
+ if ( ! empty($like))
+ {
+ $where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+ }
- return $sql;
+ return 'UPDATE '.$table.' SET '.implode(', ', $valstr).' WHERE '.$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;
}
// --------------------------------------------------------------------
@@ -610,31 +479,24 @@ class CI_DB_mssql_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 = array(), $like = array(), $limit = FALSE)
+ protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
- $conditions = '';
+ $conditions = array();
- if (count($where) > 0 OR count($like) > 0)
- {
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
+ empty($where) OR $conditions[] = implode(' ', $where);
+ empty($like) OR $conditions[] = implode(' ', $like);
- if (count($where) > 0 && count($like) > 0)
- {
- $conditions .= " AND ";
- }
- $conditions .= implode("\n", $like);
- }
+ $conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return "DELETE FROM ".$table.$conditions.$limit;
+ return ($limit)
+ ? 'WITH ci_delete AS (SELECT TOP '.$limit.' * FROM '.$table.$conditions.') DELETE FROM ci_delete'
+ : 'DELETE FROM '.$table.$conditions;
}
// --------------------------------------------------------------------
@@ -644,13 +506,12 @@ class CI_DB_mssql_driver extends CI_DB {
*
* Generates a platform-specific LIMIT clause
*
- * @access public
* @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param int the number of rows to limit the query to
+ * @param int the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _limit($sql, $limit, $offset)
{
$i = $limit + $offset;
@@ -662,18 +523,15 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
* @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close($conn_id)
{
@mssql_close($conn_id);
}
}
-
-
/* End of file mssql_driver.php */
/* Location: ./system/database/drivers/mssql/mssql_driver.php */ \ No newline at end of file