4 files changed, 35 insertions, 194 deletions

diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 81af6cd72..f60ec8168 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -29,7 +29,7 @@
  * MS SQL 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
@@ -404,47 +404,6 @@ class CI_DB_mssql_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Escape the SQL Identifiers
-	 *
-	 * This function escapes column and table names
-	 *
-	 * @param	string
-	 * @return	string
-	 */
-	public function _escape_identifiers($item)
-	{
-		if ($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);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -466,23 +425,6 @@ class CI_DB_mssql_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Insert statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert($table, $keys, $values)
-	{
-		return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
@@ -490,46 +432,44 @@ class CI_DB_mssql_driver extends CI_DB {
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
 	 * @return	string
 	 */
-	protected function _update($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"
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
 	 *
 	 * @param	string	the table name
 	 * @return	string
 	 */
 	protected function _truncate($table)
 	{
-		return "TRUNCATE ".$table;
+		return 'TRUNCATE TABLE '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -541,28 +481,22 @@ class CI_DB_mssql_driver extends CI_DB {
 	 *
 	 * @param	string	the table name
 	 * @param	array	the where clause
+	 * @param	array	the like clause
 	 * @param	string	the limit clause
 	 * @return	string
 	 */
 	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
 	{
-		$conditions = '';
-
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions = "\nWHERE ";
-			$conditions .= implode("\n", $this->ar_where);
+		$conditions = array();
 
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= " AND ";
-			}
-			$conditions .= implode("\n", $like);
-		}
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
 
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
 
-		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;
 	}
 
 	// --------------------------------------------------------------------
@@ -600,4 +534,4 @@ class CI_DB_mssql_driver extends CI_DB {
 }
 
 /* End of file mssql_driver.php */
-/* Location: ./system/database/drivers/mssql/mssql_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/mssql/mssql_driver.php */
diff --git a/system/database/drivers/mssql/mssql_forge.php b/system/database/drivers/mssql/mssql_forge.php
index 2e3e314ed..8f8e7c5b9 100644
--- a/system/database/drivers/mssql/mssql_forge.php
+++ b/system/database/drivers/mssql/mssql_forge.php
@@ -34,44 +34,7 @@
  */
 class CI_DB_mssql_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _create_database($name)
-	{
-		return "CREATE DATABASE ".$name;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _drop_database($name)
-	{
-		return "DROP DATABASE ".$name;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop Table
-	 *
-	 * @param	string	table name
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return "DROP TABLE ".$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
+	protected $_drop_table	= 'DROP TABLE %s';
 
 	/**
 	 * Create Table
@@ -83,7 +46,7 @@ class CI_DB_mssql_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	string
 	 */
-	public function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
+	protected function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
 	{
 		$sql = 'CREATE TABLE ';
 
@@ -92,7 +55,7 @@ class CI_DB_mssql_forge extends CI_DB_forge {
 			$sql .= 'IF NOT EXISTS ';
 		}
 
-		$sql .= $this->db->_escape_identifiers($table)." (";
+		$sql .= $this->db->escape_identifiers($table).' (';
 		$current_field_count = 0;
 
 		foreach ($fields as $field => $attributes)
@@ -194,7 +157,7 @@ class CI_DB_mssql_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
+	protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
 	{
 		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name);
 
@@ -229,23 +192,6 @@ class CI_DB_mssql_forge extends CI_DB_forge {
 
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * Rename a table
-	 *
-	 * Generates a platform-specific query so that a table can be renamed
-	 *
-	 * @param	string	the old table name
-	 * @param	string	the new table name
-	 * @return	string
-	 */
-	public function _rename_table($table_name, $new_table_name)
-	{
-		// I think this syntax will work, but can find little documentation on renaming tables in MSSQL
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file mssql_forge.php */
diff --git a/system/database/drivers/mssql/mssql_result.php b/system/database/drivers/mssql/mssql_result.php
index 2723f4614..4cc87f4cf 100644
--- a/system/database/drivers/mssql/mssql_result.php
+++ b/system/database/drivers/mssql/mssql_result.php
@@ -126,11 +126,11 @@ class CI_DB_mssql_result extends CI_DB_result {
 	/**
 	 * Data Seek
 	 *
-	 * Moves the internal pointer to the desired offset.  We call
+	 * Moves the internal pointer to the desired offset. We call
 	 * this internally before fetching results to make sure the
 	 * result set starts at zero
 	 *
-	 * @return	array
+	 * @return	bool
 	 */
 	protected function _data_seek($n = 0)
 	{
diff --git a/system/database/drivers/mssql/mssql_utility.php b/system/database/drivers/mssql/mssql_utility.php
index 5c144330d..6d47618ce 100644
--- a/system/database/drivers/mssql/mssql_utility.php
+++ b/system/database/drivers/mssql/mssql_utility.php
@@ -34,47 +34,8 @@
  */
 class CI_DB_mssql_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	string
-	 */
-	public function _list_databases()
-	{
-		return "EXEC sp_helpdb"; // Can also be: EXEC sp_databases
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _optimize_table($table)
-	{
-		return FALSE; // Is this supported in MS SQL?
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		return FALSE; // Is this supported in MS SQL?
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= 'EXEC sp_helpdb'; // Can also be: EXEC sp_databases
+	protected $_optimize_table	= 'ALTER INDEX all ON %s REORGANIZE';
 
 	/**
 	 * MSSQL Export
@@ -82,7 +43,7 @@ class CI_DB_mssql_utility extends CI_DB_utility {
 	 * @param	array	Preferences
 	 * @return	mixed
 	 */
-	public function _backup($params = array())
+	protected function _backup($params = array())
 	{
 		// Currently unsupported
 		return $this->db->display_error('db_unsuported_feature');