Fixed conflicts.

48 files changed, 343 insertions, 2875 deletions

diff --git a/system/database/drivers/cubrid/cubrid_driver.php b/system/database/drivers/cubrid/cubrid_driver.php
index 0f9c427e6..c5018bf93 100644
--- a/system/database/drivers/cubrid/cubrid_driver.php
+++ b/system/database/drivers/cubrid/cubrid_driver.php
@@ -29,7 +29,7 @@
  * CUBRID 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
@@ -435,45 +435,6 @@ class CI_DB_cubrid_driver extends CI_DB {
 		return array('code' => cubrid_errno($this->conn_id), 'message' => cubrid_error($this->conn_id));
 	}
 
-	/**
-	 * 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);
-	}
-
 	// --------------------------------------------------------------------
 
 	/**
@@ -498,94 +459,6 @@ class CI_DB_cubrid_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(', ', $values).")";
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
-	 * Replace statement
-	 *
-	 * Generates a platform-specific replace string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _replace($table, $keys, $values)
-	{
-		return "REPLACE INTO ".$table." (\"".implode('", "', $keys)."\") VALUES (".implode(', ', $values).")";
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert_batch statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert_batch($table, $keys, $values)
-	{
-		return "INSERT INTO ".$table." (\"".implode('", "', $keys)."\") VALUES ".implode(', ', $values);
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = sprintf('"%s" = %s', $key, $val);
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
-
-		$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
-		$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
-		$sql .= $orderby.$limit;
-
-		return $sql;
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
 	 * Update_Batch statement
 	 *
 	 * Generates a platform-specific batch update string from the supplied data
@@ -635,57 +508,7 @@ class CI_DB_cubrid_driver extends CI_DB {
 	}
 
 	// --------------------------------------------------------------------
-
-	/**
-	 * 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"
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return "TRUNCATE ".$table;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the where 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", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= " AND ";
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		return "DELETE FROM ".$table.$conditions.$limit;
-	}
-
-	// --------------------------------------------------------------------
-
+	
 	/**
 	 * Limit string
 	 *
@@ -726,4 +549,4 @@ class CI_DB_cubrid_driver extends CI_DB {
 }
 
 /* End of file cubrid_driver.php */
-/* Location: ./system/database/drivers/cubrid/cubrid_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/cubrid/cubrid_driver.php */
diff --git a/system/database/drivers/cubrid/cubrid_forge.php b/system/database/drivers/cubrid/cubrid_forge.php
index bbda484c4..16478ee11 100644
--- a/system/database/drivers/cubrid/cubrid_forge.php
+++ b/system/database/drivers/cubrid/cubrid_forge.php
@@ -34,35 +34,8 @@
  */
 class CI_DB_cubrid_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _create_database($name)
-	{
-		// CUBRID does not allow to create a database in SQL. The GUI tools
-		// have to be used for this purpose.
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _drop_database($name)
-	{
-		// CUBRID does not allow to drop a database in SQL. The GUI tools
-		// have to be used for this purpose.
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_create_database	= FALSE;
+	protected $_drop_database	= FALSE;
 
 	/**
 	 * Process Fields
@@ -174,7 +147,7 @@ class CI_DB_cubrid_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -184,9 +157,7 @@ class CI_DB_cubrid_forge extends CI_DB_forge {
 			// As of version 8.4.0 CUBRID does not support this SQL syntax.
 		}
 
-		$sql .= $this->db->_escape_identifiers($table)." (";
-
-		$sql .= $this->_process_fields($fields);
+		$sql .= $this->db->escape_identifiers($table).' ('.$this->_process_fields($fields);
 
 		// If there is a PK defined
 		if (count($primary_keys) > 0)
@@ -224,18 +195,6 @@ class CI_DB_cubrid_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -247,7 +206,7 @@ class CI_DB_cubrid_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $fields, $after_field = '')
+	protected function _alter_table($alter_type, $table, $fields, $after_field = '')
 	{
 		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' ';
 
@@ -267,22 +226,6 @@ class CI_DB_cubrid_forge extends CI_DB_forge {
 		return $sql;
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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, $new_table_name)
-	{
-		return 'RENAME TABLE '.$this->db->protect_identifiers($table_name).' AS '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file cubrid_forge.php */
diff --git a/system/database/drivers/cubrid/cubrid_result.php b/system/database/drivers/cubrid/cubrid_result.php
index 6a61a213d..58dcff29a 100644
--- a/system/database/drivers/cubrid/cubrid_result.php
+++ b/system/database/drivers/cubrid/cubrid_result.php
@@ -163,7 +163,7 @@ class CI_DB_cubrid_result extends CI_DB_result {
 	 * this internally before fetching results to make sure the
 	 * result set starts at zero
 	 *
-	 * @return	array
+	 * @return	bool
 	 */
 	protected function _data_seek($n = 0)
 	{
diff --git a/system/database/drivers/cubrid/cubrid_utility.php b/system/database/drivers/cubrid/cubrid_utility.php
index dafd66146..274ff6a48 100644
--- a/system/database/drivers/cubrid/cubrid_utility.php
+++ b/system/database/drivers/cubrid/cubrid_utility.php
@@ -39,69 +39,25 @@ class CI_DB_cubrid_utility extends CI_DB_utility {
 	 *
 	 * @return	array
 	 */
-	public function _list_databases()
+	public function list_databases()
 	{
-		// CUBRID does not allow to see the list of all databases on the
-		// server. It is the way its architecture is designed. Every
-		// database is independent and isolated.
-		// For this reason we can return only the name of the currect
-		// connected database.
-		if ($this->conn_id)
+		if (isset($this->data_cache['db_names']))
 		{
-			return "SELECT '" . $this->database . "'";
+			return $this->data_cache['db_names'];
 		}
-		else
-		{
-			return FALSE;
-		}
-	}
-
-	// --------------------------------------------------------------------
 
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 * @link 	http://www.cubrid.org/manual/840/en/Optimize%20Database
-	 */
-	public function _optimize_table($table)
-	{
-		// No SQL based support in CUBRID as of version 8.4.0. Database or
-		// table optimization can be performed using CUBRID Manager
-		// database administration tool. See the link above for more info.
-		return FALSE;
+		return $this->data_cache['db_names'] = cubrid_list_dbs($this->db->conn_id);
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 * @link 	http://www.cubrid.org/manual/840/en/Checking%20Database%20Consistency
-	 */
-	public function _repair_table($table)
-	{
-		// Not supported in CUBRID as of version 8.4.0. Database or
-		// table consistency can be checked using CUBRID Manager
-		// database administration tool. See the link above for more info.
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-	/**
 	 * CUBRID Export
 	 *
 	 * @param	array	Preferences
 	 * @return	mixed
 	 */
-	public function _backup($params = array())
+	protected function _backup($params = array())
 	{
 		// No SQL based support in CUBRID as of version 8.4.0. Database or
 		// table backup can be performed using CUBRID Manager
diff --git a/system/database/drivers/interbase/interbase_driver.php b/system/database/drivers/interbase/interbase_driver.php
index 6d3346292..1b18de803 100644
--- a/system/database/drivers/interbase/interbase_driver.php
+++ b/system/database/drivers/interbase/interbase_driver.php
@@ -29,7 +29,7 @@
  * Firebird/Interbase 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
@@ -343,38 +343,6 @@ class CI_DB_interbase_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Escape the SQL Identifiers
-	 *
-	 * This public function escapes column and table names
-	 *
-	 * @param	string
-	 * @return	string
-	 */
-	protected function _escape_identifiers($item)
-	{
-		foreach ($this->_reserved_identifiers as $id)
-		{
-			if (strpos($item, '.'.$id) !== FALSE)
-			{
-				$item = str_replace('.', $this->_escape_char.'.', $item);
-
-				// remove duplicates if the user already included the escape
-				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
-			}
-		}
-
-		if (strpos($item, '.') !== FALSE)
-		{
-			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
-		}
-
-		// remove duplicates if the user already included the escape
-		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This public function implicitly groups FROM tables so there is no confusion
@@ -397,23 +365,6 @@ class CI_DB_interbase_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(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
@@ -422,20 +373,26 @@ class CI_DB_interbase_driver extends CI_DB {
 	 * @param	array	the update data
 	 * @param	array	the where clause
 	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
 	 * @return	string
 	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
 	{
 		foreach ($values as $key => $val)
 		{
 			$valstr[] = $key.' = '.$val;
 		}
 
-		//$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
 
 		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
+			.$where
 			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '');
 	}
 
@@ -446,15 +403,16 @@ class CI_DB_interbase_driver extends CI_DB {
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
-	 * If the database does not support the truncate() command
-	 * This public 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 $this->_delete($table);
+		return 'DELETE FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -466,25 +424,18 @@ class CI_DB_interbase_driver extends CI_DB {
 	 *
 	 * @param	string	the table name
 	 * @param	array	the where clause
-	 * @param	string	the limit clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
 	 * @return	string
 	 */
 	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
 	{
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions = "\nWHERE ".implode("\n", $where)
-					.((count($where) > 0 && count($like) > 0) ? ' AND ' : '')
-					.implode("\n", $like);
-		}
-		else
-		{
-			$conditions = '';
-		}
+		$conditions = array();
 
-		//$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
 
-		return 'DELETE FROM '.$table.' '.$conditions;
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/interbase/interbase_forge.php b/system/database/drivers/interbase/interbase_forge.php
index f46043569..c850656a8 100644
--- a/system/database/drivers/interbase/interbase_forge.php
+++ b/system/database/drivers/interbase/interbase_forge.php
@@ -25,8 +25,6 @@
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * Interbase/Firebird Forge Class
  *
@@ -36,18 +34,22 @@
  */
 class CI_DB_interbase_forge extends CI_DB_forge {
 
+	protected $_drop_table	= 'DROP TABLE %s';
+
 	/**
 	 * Create database
 	 *
 	 * @param	string	the database name
 	 * @return	string
 	 */
-	protected function _create_database($filename='')
+	public function create_database($db_name)
 	{
-		// Firebird databases are flat files, so a path is required 
+		// Firebird databases are flat files, so a path is required
+
 		// Hostname is needed for remote access
-		return 'CREATE DATABASE "'.$this->hostname.':'.$filename.'"';
-		
+		empty($this->db->hostname) OR $db_name = $this->hostname.':'.$db_name;
+
+		return parent::create_database('"'.$db_name.'"');
 	}
 
 	// --------------------------------------------------------------------
@@ -55,14 +57,20 @@ class CI_DB_interbase_forge extends CI_DB_forge {
 	/**
 	 * Drop database
 	 *
-	 * @param	string	the database name - not used in this driver 
-	 *	- the current db is dropped
+	 * @param	string	the database name
+	 *		- not used in this driver, the current db is dropped
 	 * @return	bool
 	 */
-	protected function _drop_database($name='')
+	public function drop_database($db_name = '')
 	{
-		return ibase_drop_db($this->conn_id);
+		if ( ! ibase_drop_db($this->conn_id))
+		{
+			return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
+		}
+
+		return TRUE;
 	}
+
 	// --------------------------------------------------------------------
 
 	/**
@@ -72,7 +80,7 @@ class CI_DB_interbase_forge extends CI_DB_forge {
 	 * @param	array	the fields
 	 * @param	mixed	primary key(s)
 	 * @param	mixed	key(s)
-	 * @param	boolean	should 'IF NOT EXISTS' be added to the SQL
+	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	string
 	 */
 	protected function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
@@ -167,18 +175,6 @@ class CI_DB_interbase_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	string
-	 */
-	protected function _drop_table($table)
-	{
-		return 'DROP TABLE '.$name;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -189,7 +185,7 @@ class CI_DB_interbase_forge extends CI_DB_forge {
 	 * @param	string	the table name
 	 * @param	string	the column definition
 	 * @param	string	the default value
-	 * @param	boolean	should 'NOT NULL' be added
+	 * @param	bool	should 'NOT NULL' be added
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
@@ -222,21 +218,6 @@ class CI_DB_interbase_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
-	 */
-	protected function _rename_table($table_name, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
 }
 
 /* End of file interbase_forge.php */
diff --git a/system/database/drivers/interbase/interbase_result.php b/system/database/drivers/interbase/interbase_result.php
index fd4178dec..5ddb6fa47 100644
--- a/system/database/drivers/interbase/interbase_result.php
+++ b/system/database/drivers/interbase/interbase_result.php
@@ -131,23 +131,6 @@ class CI_DB_interbase_result extends CI_DB_result {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Data Seek
-	 *
-	 * 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
-	 */
-	protected function _data_seek($n = 0)
-	{
-		// Interbase driver doesn't implement a suitable function
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Result - associative array
 	 *
 	 * Returns the result set as an array
diff --git a/system/database/drivers/interbase/interbase_utility.php b/system/database/drivers/interbase/interbase_utility.php
index a88055ee0..1b92af9b6 100644
--- a/system/database/drivers/interbase/interbase_utility.php
+++ b/system/database/drivers/interbase/interbase_utility.php
@@ -25,8 +25,6 @@
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * Interbase/Firebird Utility Class
  *
@@ -36,56 +34,7 @@
  */
 class CI_DB_interbase_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * I don't believe you can do a database listing with Firebird
-	 * since each database is its own file.  I suppose we could
-	 * try reading a directory looking for Firebird files, but
-	 * that doesn't seem like a terribly good idea
-	 *
-	 * @return	bool
-	 */
-	public function _list_databases()
-	{
-		if ($this->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Is optimization even supported in Interbase/Firebird?
-	 *
-	 * @param	string	the table name
-	 * @return	object
-	 */
-	public function _optimize_table($table)
-	{
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Table repairs are not supported in Interbase/Firebird
-	 *
-	 * @param	string	the table name
-	 * @return	object
-	 */
-	public function _repair_table($table)
-	{
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= FALSE;
 
 	/**
 	 * Interbase/Firebird Export
@@ -93,22 +42,20 @@ class CI_DB_interbase_utility extends CI_DB_utility {
 	 * @param	string	$filename
 	 * @return	mixed
 	 */
-	public function backup($filename)
+	protected function backup($filename)
 	{
 		if ($service = ibase_service_attach($this->db->hostname, $this->db->username, $this->db->password))
 		{
 			$res = ibase_backup($service, $this->db->database, $filename.'.fbk');
-			
-			//Close the service connection	
+
+			// Close the service connection
 			ibase_service_detach($service);
-			
 			return $res;
 		}
-		else
-		{
-			return FALSE;
-		}
+
+		return FALSE;
 	}
+
 }
 
 /* End of file interbase_utility.php */
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');
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index bef4111c3..32c51865d 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -29,7 +29,7 @@
  * MySQL 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
@@ -439,43 +439,6 @@ class CI_DB_mysql_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)
-			{
-				$item = str_replace('.', $this->_escape_char.'.', $item);
-
-				// remove duplicates if the user already included the escape
-				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
-			}
-		}
-
-		if (strpos($item, '.') !== FALSE)
-		{
-			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
-		}
-
-		// remove duplicates if the user already included the escape
-		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -497,92 +460,6 @@ class CI_DB_mysql_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(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
-	 * Replace statement
-	 *
-	 * Generates a platform-specific replace string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _replace($table, $keys, $values)
-	{
-		return 'REPLACE INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert_batch statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert_batch($table, $keys, $values)
-	{
-		return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key.' = '.$val;
-		}
-
-		$where = ($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '';
-		if (count($like) > 0)
-		{
-			$where .= ($where == '' ? ' WHERE ' : ' AND ').implode(' ', $like);
-		}
-
-		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.( ! $limit ? '' : ' LIMIT '.$limit);
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
 	 * Update_Batch statement
 	 *
 	 * Generates a platform-specific batch update string from the supplied data
@@ -624,53 +501,6 @@ class CI_DB_mysql_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * 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"
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return 'TRUNCATE '.$table;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the where 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 ".implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= ' AND ';
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Limit string
 	 *
 	 * Generates a platform-specific LIMIT clause
@@ -701,4 +531,4 @@ class CI_DB_mysql_driver extends CI_DB {
 }
 
 /* End of file mysql_driver.php */
-/* Location: ./system/database/drivers/mysql/mysql_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/mysql/mysql_driver.php */
diff --git a/system/database/drivers/mysql/mysql_forge.php b/system/database/drivers/mysql/mysql_forge.php
index 9e19de1bb..0e39affa7 100644
--- a/system/database/drivers/mysql/mysql_forge.php
+++ b/system/database/drivers/mysql/mysql_forge.php
@@ -34,31 +34,7 @@
  */
 class CI_DB_mysql_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _create_database($name)
-	{
-		return 'CREATE DATABASE '.$name.' CHARACTER SET '.$this->db->char_set.' COLLATE '.$this->db->dbcollat;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _drop_database($name)
-	{
-		return 'DROP DATABASE '.$name;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_create_database	= 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s';
 
 	/**
 	 * Process Fields
@@ -138,7 +114,7 @@ class CI_DB_mysql_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -180,19 +156,6 @@ class CI_DB_mysql_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @param	string	table name
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return 'DROP TABLE IF EXISTS '.$this->db->protect_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -204,7 +167,7 @@ class CI_DB_mysql_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $fields, $after_field = '')
+	protected function _alter_table($alter_type, $table, $fields, $after_field = '')
 	{
 		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' ';
 
@@ -218,22 +181,6 @@ class CI_DB_mysql_forge extends CI_DB_forge {
 			.($after_field != '' ? ' AFTER '.$this->db->protect_identifiers($after_field) : '');
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file mysql_forge.php */
diff --git a/system/database/drivers/mysql/mysql_result.php b/system/database/drivers/mysql/mysql_result.php
index f76076f4c..14d6d072a 100644
--- a/system/database/drivers/mysql/mysql_result.php
+++ b/system/database/drivers/mysql/mysql_result.php
@@ -128,7 +128,7 @@ class CI_DB_mysql_result extends CI_DB_result {
 	 * 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/mysql/mysql_utility.php b/system/database/drivers/mysql/mysql_utility.php
index 2d89cb9cb..642323dbd 100644
--- a/system/database/drivers/mysql/mysql_utility.php
+++ b/system/database/drivers/mysql/mysql_utility.php
@@ -34,54 +34,17 @@
  */
 class CI_DB_mysql_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	string
-	 */
-	public function _list_databases()
-	{
-		return 'SHOW DATABASES';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _optimize_table($table)
-	{
-		return 'OPTIMIZE TABLE '.$this->db->protect_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _repair_table($table)
-	{
-		return 'REPAIR TABLE '.$this->db->protect_identifiers($table);
-	}
+	protected $_list_databases	= 'SHOW DATABASES';
+	protected $_optimize_table	= 'OPTIMIZE TABLE %s';
+	protected $_repair_table	= 'REPAIR TABLE %s';
 
-	// --------------------------------------------------------------------
 	/**
 	 * MySQL Export
 	 *
 	 * @param	array	Preferences
 	 * @return	mixed
 	 */
-	public function _backup($params = array())
+	protected function _backup($params = array())
 	{
 		if (count($params) === 0)
 		{
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index 47b0449d6..e2684e4f2 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -29,7 +29,7 @@
  * MySQLi 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
@@ -439,43 +439,6 @@ class CI_DB_mysqli_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)
-			{
-				$item = str_replace('.', $this->_escape_char.'.', $item);
-
-				// remove duplicates if the user already included the escape
-				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
-			}
-		}
-
-		if (strpos($item, '.') !== FALSE)
-		{
-			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
-		}
-
-		// remove duplicates if the user already included the escape
-		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -497,85 +460,6 @@ class CI_DB_mysqli_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(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert_batch statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert_batch($table, $keys, $values)
-	{
-		return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
-	}
-
-	// --------------------------------------------------------------------
-
-
-	/**
-	 * Replace statement
-	 *
-	 * Generates a platform-specific replace string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _replace($table, $keys, $values)
-	{
-		return 'REPLACE INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key.' = '.$val;
-		}
-
-		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.( ! $limit ? '' : ' LIMIT '.$limit);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Update_Batch statement
 	 *
 	 * Generates a platform-specific batch update string from the supplied data
@@ -619,52 +503,6 @@ class CI_DB_mysqli_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * 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"
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return 'TRUNCATE '.$table;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the where 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 ".implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= ' AND ';
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Limit string
 	 *
 	 * Generates a platform-specific LIMIT clause
@@ -697,4 +535,4 @@ class CI_DB_mysqli_driver extends CI_DB {
 }
 
 /* End of file mysqli_driver.php */
-/* Location: ./system/database/drivers/mysqli/mysqli_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/mysqli/mysqli_driver.php */
diff --git a/system/database/drivers/mysqli/mysqli_forge.php b/system/database/drivers/mysqli/mysqli_forge.php
index a1caf5cfb..503574dfc 100644
--- a/system/database/drivers/mysqli/mysqli_forge.php
+++ b/system/database/drivers/mysqli/mysqli_forge.php
@@ -34,31 +34,7 @@
  */
 class CI_DB_mysqli_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _create_database($name)
-	{
-		return 'CREATE DATABASE '.$name.' CHARACTER SET '.$this->db->char_set.' COLLATE '.$this->db->dbcollat;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	string
-	 */
-	public function _drop_database($name)
-	{
-		return 'DROP DATABASE '.$name;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_create_database	= 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s';
 
 	/**
 	 * Process Fields
@@ -139,7 +115,7 @@ class CI_DB_mysqli_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -148,7 +124,7 @@ class CI_DB_mysqli_forge extends CI_DB_forge {
 			$sql .= 'IF NOT EXISTS ';
 		}
 
-		$sql .= $this->db->_escape_identifiers($table).' ('.$this->_process_fields($fields);
+		$sql .= $this->db->escape_identifiers($table).' ('.$this->_process_fields($fields);
 
 		if (count($primary_keys) > 0)
 		{
@@ -181,18 +157,6 @@ class CI_DB_mysqli_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return 'DROP TABLE IF EXISTS '.$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -204,7 +168,7 @@ class CI_DB_mysqli_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $fields, $after_field = '')
+	protected function _alter_table($alter_type, $table, $fields, $after_field = '')
 	{
 		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' ';
 
@@ -218,22 +182,6 @@ class CI_DB_mysqli_forge extends CI_DB_forge {
 			.($after_field != '' ? ' AFTER '.$this->db->protect_identifiers($after_field) : '');
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file mysqli_forge.php */
diff --git a/system/database/drivers/mysqli/mysqli_result.php b/system/database/drivers/mysqli/mysqli_result.php
index cf0362217..9b4d494d4 100644
--- a/system/database/drivers/mysqli/mysqli_result.php
+++ b/system/database/drivers/mysqli/mysqli_result.php
@@ -125,11 +125,11 @@ class CI_DB_mysqli_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/mysqli/mysqli_utility.php b/system/database/drivers/mysqli/mysqli_utility.php
index 4d7002e78..27d4ef817 100644
--- a/system/database/drivers/mysqli/mysqli_utility.php
+++ b/system/database/drivers/mysqli/mysqli_utility.php
@@ -34,47 +34,9 @@
  */
 class CI_DB_mysqli_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	string
-	 */
-	public function _list_databases()
-	{
-		return 'SHOW DATABASES';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _optimize_table($table)
-	{
-		return 'OPTIMIZE TABLE '.$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _repair_table($table)
-	{
-		return 'REPAIR TABLE '.$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= 'SHOW DATABASES';
+	protected $_optimize_table	= 'OPTIMIZE TABLE %s';
+	protected $_repair_table	= 'REPAIR TABLE %s';
 
 	/**
 	 * MySQLi Export
@@ -82,7 +44,7 @@ class CI_DB_mysqli_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');
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 0a96f3f6d..33a89df94 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -29,7 +29,7 @@
  * oci8 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
@@ -567,43 +567,6 @@ class CI_DB_oci8_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)
-			{
-				$item = str_replace('.', $this->_escape_char.'.', $item);
-
-				// remove duplicates if the user already included the escape
-				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
-			}
-		}
-
-		if (strpos($item, '.') !== FALSE)
-		{
-			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
-		}
-
-		// remove duplicates if the user already included the escape
-		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -620,23 +583,6 @@ class CI_DB_oci8_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).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Insert_batch statement
 	 *
 	 * Generates a platform-specific insert string from the supplied data
@@ -653,7 +599,7 @@ class CI_DB_oci8_driver extends CI_DB {
 
 		for ($i = 0, $c = count($values); $i < $c; $i++)
 		{
-			$sql .= '	INTO '.$table.' ('.$keys.') VALUES '.$values[$i].'\n';
+			$sql .= '	INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n";
 		}
 
 		return $sql.'SELECT * FROM dual';
@@ -662,38 +608,12 @@ class CI_DB_oci8_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @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
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key.' = '.$val;
-		}
-
-		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.( ! $limit ? '' : ' LIMIT '.$limit);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * 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
@@ -712,24 +632,19 @@ class CI_DB_oci8_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 ".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(' ', $like);
+		empty($limit) OR $conditions[] = 'rownum <= '.$limit;
 
-		return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
 	}
 
 	// --------------------------------------------------------------------
@@ -767,4 +682,4 @@ class CI_DB_oci8_driver extends CI_DB {
 }
 
 /* End of file oci8_driver.php */
-/* Location: ./system/database/drivers/oci8/oci8_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/oci8/oci8_driver.php */
diff --git a/system/database/drivers/oci8/oci8_forge.php b/system/database/drivers/oci8/oci8_forge.php
index 4b2eccae5..bd265b6e0 100644
--- a/system/database/drivers/oci8/oci8_forge.php
+++ b/system/database/drivers/oci8/oci8_forge.php
@@ -34,33 +34,9 @@
  */
 class CI_DB_oci8_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _create_database($name)
-	{
-		// Not supported - schemas in Oracle are actual usernames
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _drop_database($name)
-	{
-		// Not supported - schemas in Oracle are actual usernames
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_create_database	= FALSE;
+	protected $_drop_database	= FALSE;
+	protected $_drop_table		= 'DROP TABLE %s';
 
 	/**
 	 * Create Table
@@ -72,7 +48,7 @@ class CI_DB_oci8_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 ';
 
@@ -81,7 +57,7 @@ class CI_DB_oci8_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)
@@ -140,18 +116,6 @@ class CI_DB_oci8_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return 'DROP TABLE '.$this->db->protect_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -166,7 +130,7 @@ class CI_DB_oci8_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($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);
 
@@ -183,22 +147,6 @@ class CI_DB_oci8_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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file oci8_forge.php */
diff --git a/system/database/drivers/oci8/oci8_result.php b/system/database/drivers/oci8/oci8_result.php
index aad24cfd9..7b05e0a43 100644
--- a/system/database/drivers/oci8/oci8_result.php
+++ b/system/database/drivers/oci8/oci8_result.php
@@ -244,8 +244,6 @@ class CI_DB_oci8_result extends CI_DB_result {
 			$this->row_data[$row_index++] = $row;
 		}
 
-		// Un-comment the following line, in case it becomes needed
-		// $this->_data_seek();
 		return $this->result_array = $this->row_data;
 	}
 
@@ -299,8 +297,6 @@ class CI_DB_oci8_result extends CI_DB_result {
 			$this->result_object[$row_index++] = $row;
 		}
 
-		// Un-comment the following line, in case it becomes needed
-		// $this->_data_seek();
 		return $this->result_object;
 	}
 
diff --git a/system/database/drivers/oci8/oci8_utility.php b/system/database/drivers/oci8/oci8_utility.php
index efb4bca02..0183eda26 100644
--- a/system/database/drivers/oci8/oci8_utility.php
+++ b/system/database/drivers/oci8/oci8_utility.php
@@ -34,50 +34,7 @@
  */
 class CI_DB_oci8_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * Generates a platform-specific query so that we get a list of schemas
-	 * Those are actually usernames in Oracle.
-	 *
-	 * @return	string
-	 */
-	public function _list_databases()
-	{
-		return 'SELECT username FROM dba_users';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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($table)
-	{
-		return FALSE; // Not supported in Oracle
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		return FALSE; // Not supported in Oracle
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= 'SELECT username FROM dba_users'; // Schemas are actual usernames
 
 	/**
 	 * Oracle Export
@@ -85,7 +42,7 @@ class CI_DB_oci8_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');
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index ed901bd81..e36f2d233 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -29,7 +29,7 @@
  * ODBC 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
@@ -343,47 +343,6 @@ class CI_DB_odbc_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
@@ -405,103 +364,19 @@ class CI_DB_odbc_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(', ', $values).")";
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key." = ".$val;
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
-
-		$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
-		$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
-		$sql .= $orderby.$limit;
-
-		return $sql;
-	}
-
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
-	 * If the database does not support the truncate() command
-	 * This function maps to "DELETE FROM table"
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return $this->_delete($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
 	 *
-	 * Generates a platform-specific delete string from the supplied data
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
 	 *
 	 * @param	string	the table name
-	 * @param	array	the where clause
-	 * @param	string	the limit clause
 	 * @return	string
 	 */
-	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	protected function _truncate($table)
 	{
-		$conditions = '';
-
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions = "\nWHERE ";
-			$conditions .= implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= " AND ";
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		return "DELETE FROM ".$table.$conditions.$limit;
+		return 'DELETE FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -538,4 +413,4 @@ class CI_DB_odbc_driver extends CI_DB {
 }
 
 /* End of file odbc_driver.php */
-/* Location: ./system/database/drivers/odbc/odbc_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/odbc/odbc_driver.php */
diff --git a/system/database/drivers/odbc/odbc_forge.php b/system/database/drivers/odbc/odbc_forge.php
index 486a8dd7f..d59b8a911 100644
--- a/system/database/drivers/odbc/odbc_forge.php
+++ b/system/database/drivers/odbc/odbc_forge.php
@@ -34,43 +34,8 @@
  */
 class CI_DB_odbc_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _create_database()
-	{
-		// ODBC has no "create database" command since it's
-		// designed to connect to an existing database
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _drop_database($name)
-	{
-		// ODBC has no "drop database" command since it's
-		// designed to connect to an existing database
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_drop_database	= 'DROP DATABASE %s';
+	protected $_drop_table		= 'DROP TABLE %s';
 
 	/**
 	 * Create Table
@@ -82,7 +47,7 @@ class CI_DB_odbc_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -91,7 +56,7 @@ class CI_DB_odbc_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)
@@ -179,23 +144,6 @@ class CI_DB_odbc_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	bool
-	 */
-	public function _drop_table($table)
-	{
-		// Not a supported ODBC feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -210,7 +158,7 @@ class CI_DB_odbc_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($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);
 
@@ -245,23 +193,6 @@ class CI_DB_odbc_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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file odbc_forge.php */
diff --git a/system/database/drivers/odbc/odbc_result.php b/system/database/drivers/odbc/odbc_result.php
index 30cc979ce..ecba5977e 100644
--- a/system/database/drivers/odbc/odbc_result.php
+++ b/system/database/drivers/odbc/odbc_result.php
@@ -140,22 +140,6 @@ class CI_DB_odbc_result extends CI_DB_result {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Data Seek
-	 *
-	 * 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	bool
-	 */
-	protected function _data_seek($n = 0)
-	{
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Result - associative array
 	 *
 	 * Returns the result set as an array
diff --git a/system/database/drivers/odbc/odbc_utility.php b/system/database/drivers/odbc/odbc_utility.php
index 65445e96c..224d48d2b 100644
--- a/system/database/drivers/odbc/odbc_utility.php
+++ b/system/database/drivers/odbc/odbc_utility.php
@@ -34,62 +34,7 @@
  */
 class CI_DB_odbc_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	bool
-	 */
-	public function _list_databases()
-	{
-		// Not sure if ODBC lets you list all databases...
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _optimize_table($table)
-	{
-		// Not a supported ODBC feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		// Not a supported ODBC feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= FALSE;
 
 	/**
 	 * ODBC Export
@@ -97,7 +42,7 @@ class CI_DB_odbc_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');
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index a9bed367e..89e69676d 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -29,7 +29,7 @@
  * PDO 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
@@ -46,8 +46,8 @@ class CI_DB_pdo_driver extends CI_DB {
 	protected $_escape_char = '';
 
 	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str;
-	protected $_like_escape_chr;
+	protected $_like_escape_str = " ESCAPE '%s' ";
+	protected $_like_escape_chr = '!';
 
 	/**
 	 * The syntax to count rows is slightly different across different
@@ -81,18 +81,17 @@ class CI_DB_pdo_driver extends CI_DB {
 		// this one depends on the driver being used
 		if ($this->pdodriver == 'mysql')
 		{
+			$this->_escape_char = '`';
 			$this->_like_escape_str = '';
 			$this->_like_escape_chr = '';
 		}
 		elseif ($this->pdodriver == 'odbc')
 		{
 			$this->_like_escape_str = " {escape '%s'} ";
-			$this->_like_escape_chr = '!';
 		}
-		else
+		elseif ( ! in_array($this->pdodriver, array('sqlsrv', 'mssql', 'dblib', 'sybase')))
 		{
-			$this->_like_escape_str = " ESCAPE '%s' ";
-			$this->_like_escape_chr = '!';
+			$this->_escape_char = '"';
 		}
 
 		$this->trans_enabled = FALSE;
@@ -184,6 +183,8 @@ class CI_DB_pdo_driver extends CI_DB {
 	    }
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
 	 * Non-persistent database connection
 	 *
@@ -191,9 +192,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	public function db_connect()
 	{
-		$this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
-
-		return $this->pdo_connect();
+		return $this->_pdo_connect();
 	}
 
 	// --------------------------------------------------------------------
@@ -205,10 +204,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	public function db_pconnect()
 	{
-		$this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
-		$this->options[PDO::ATTR_PERSISTENT] = TRUE;
-
-		return $this->pdo_connect();
+		return $this->_pdo_connect(TRUE);
 	}
 
 	// --------------------------------------------------------------------
@@ -216,20 +212,29 @@ class CI_DB_pdo_driver extends CI_DB {
 	/**
 	 * PDO connection
 	 *
+	 * @param	bool
 	 * @return	object
 	 */
-	public function pdo_connect()
+	protected function _pdo_connect($persistent = FALSE)
 	{
-		// Refer : http://php.net/manual/en/ref.pdo-mysql.connection.php
-		if ($this->pdodriver === 'mysql' && ! is_php('5.3.6'))
+		$this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
+		$persistent === FALSE OR $this->options[PDO::ATTR_PERSISTENT] = TRUE;
+
+		/* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
+		 * on connect - it was ignored. This is a work-around for the issue.
+		 *
+		 * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
+		 */
+		if ($this->pdodriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
 		{
-			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = "SET NAMES $this->char_set COLLATE '$this->dbcollat'";
+			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
+					.( ! empty($this->db_collat) ? " COLLATE '".$this->dbcollat."'" : '');
 		}
 
 		// Connecting...
 		try
 		{
-			$db = new PDO($this->dsn, $this->username, $this->password, $this->options);
+			return new PDO($this->dsn, $this->username, $this->password, $this->options);
 		}
 		catch (PDOException $e)
 		{
@@ -240,8 +245,6 @@ class CI_DB_pdo_driver extends CI_DB {
 
 			return FALSE;
 		}
-
-		return $db;
 	}
 
 	// --------------------------------------------------------------------
@@ -268,46 +271,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	protected function _execute($sql)
 	{
-		$sql = $this->_prep_query($sql);
-
-		$result_id = $this->conn_id->query($sql);
-
-		if (is_object($result_id))
-		{
-			$this->affect_rows = $result_id->rowCount();
-		}
-		else
-		{
-			$this->affect_rows = 0;
-		}
-
-		return $result_id;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Prep the query
-	 *
-	 * If needed, each database adapter can prep the query string
-	 *
-	 * @param	string	an SQL query
-	 * @return	string
-	 */
-	protected function _prep_query($sql)
-	{
-		if ($this->pdodriver === 'pgsql')
-		{
-			// Change the backtick(s) for Postgre
-			$sql = str_replace('`', '"', $sql);
-		}
-		elseif ($this->pdodriver === 'sqlite')
-		{
-			// Change the backtick(s) for SQLite
-			$sql = str_replace('`', '', $sql);
-		}
-
-		return $sql;
+		return $this->conn_id->query($sql);
 	}
 
 	// --------------------------------------------------------------------
@@ -319,13 +283,8 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	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;
 		}
@@ -333,7 +292,7 @@ class CI_DB_pdo_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.
-		$this->_trans_failure = (bool) ($test_mode === TRUE);
+		$this->_trans_failure = ($test_mode === TRUE);
 
 		return $this->conn_id->beginTransaction();
 	}
@@ -347,20 +306,13 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	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;
 		}
 
-		$ret = $this->conn->commit();
-
-		return $ret;
+		return $this->conn_id->commit();
 	}
 
 	// --------------------------------------------------------------------
@@ -372,20 +324,13 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	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;
 		}
 
-		$ret = $this->conn_id->rollBack();
-
-		return $ret;
+		return $this->conn_id->rollBack();
 	}
 
 	// --------------------------------------------------------------------
@@ -409,10 +354,10 @@ class CI_DB_pdo_driver extends CI_DB {
 			return $str;
 		}
 
-		//Escape the string
+		// Escape the string
 		$str = $this->conn_id->quote($str);
 
-		//If there are duplicated quotes, trim them away
+		// If there are duplicated quotes, trim them away
 		if (strpos($str, "'") === 0)
 		{
 			$str = substr($str, 1, -1);
@@ -438,7 +383,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	public function affected_rows()
 	{
-		return $this->affect_rows;
+		return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
 	}
 
 	// --------------------------------------------------------------------
@@ -446,6 +391,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	/**
 	 * Insert ID
 	 *
+	 * @param	string
 	 * @return	int
 	 */
 	public function insert_id($name = NULL)
@@ -516,7 +462,7 @@ class CI_DB_pdo_driver extends CI_DB {
 		}
 		else
 		{
-			$sql = "SHOW TABLES FROM `".$this->database."`";
+			$sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database);
 		}
 
 		if ($prefix_limit !== FALSE AND $this->dbprefix != '')
@@ -539,7 +485,7 @@ class CI_DB_pdo_driver extends CI_DB {
 	 */
 	protected function _list_columns($table = '')
 	{
-		return 'SHOW COLUMNS FROM '.$this->_from_tables($table);
+		return 'SHOW COLUMNS FROM '.$this->escape_identifiers($table);
 	}
 
 	// --------------------------------------------------------------------
@@ -557,20 +503,20 @@ class CI_DB_pdo_driver extends CI_DB {
 		if ($this->pdodriver == 'mysql' or $this->pdodriver == 'pgsql')
 		{
 			// Analog function for mysql and postgre
-			return 'SELECT * FROM '.$this->_from_tables($table).' LIMIT 1';
+			return 'SELECT * FROM '.$this->escape_identifiers($table).' LIMIT 1';
 		}
 		elseif ($this->pdodriver == 'oci')
 		{
 			// Analog function for oci
-			return 'SELECT * FROM '.$this->_from_tables($table).' WHERE ROWNUM <= 1';
+			return 'SELECT * FROM '.$this->escape_identifiers($table).' WHERE ROWNUM <= 1';
 		}
 		elseif ($this->pdodriver == 'sqlite')
 		{
 			// Analog function for sqlite
-			return 'PRAGMA table_info('.$this->_from_tables($table).')';
+			return 'PRAGMA table_info('.$this->escape_identifiers($table).')';
 		}
 
-		return 'SELECT TOP 1 FROM '.$this->_from_tables($table);
+		return 'SELECT TOP 1 FROM '.$this->escape_identifiers($table);
 	}
 
 	// --------------------------------------------------------------------
@@ -605,48 +551,6 @@ class CI_DB_pdo_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);
-			$str .= $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
@@ -662,72 +566,7 @@ class CI_DB_pdo_driver extends CI_DB {
 			$tables = array($tables);
 		}
 
-		return (count($tables) == 1) ? '`'.$tables[0].'`' : '('.implode(', ', $tables).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert($table, $keys, $values)
-	{
-		return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert_batch statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert_batch($table, $keys, $values)
-	{
-		return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key." = ".$val;
-		}
-
-		$limit   = ( ! $limit) ? '' : ' LIMIT '.$limit;
-		$orderby = (count($orderby) >= 1) ? ' ORDER BY '.implode(', ', $orderby) : '';
-
-		$sql  = 'UPDATE '.$this->_from_tables($table).' SET '.implode(', ', $valstr);
-		$sql .= ($where != '' && count($where) >= 1) ? ' WHERE '.implode(' ', $where) : '';
-		$sql .= $orderby.$limit;
-
-		return $sql;
+		return (count($tables) === 1) ? $tables[0] : '('.implode(', ', $tables).')';
 	}
 
 	// --------------------------------------------------------------------
@@ -760,7 +599,7 @@ class CI_DB_pdo_driver extends CI_DB {
 			}
 		}
 
-		$sql   = 'UPDATE '.$this->_from_tables($table).' SET ';
+		$sql   = 'UPDATE '.$table.' SET ';
 		$cases = '';
 
 		foreach ($final as $k => $v)
@@ -787,49 +626,16 @@ class CI_DB_pdo_driver extends CI_DB {
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
-	 * If the database does not support the truncate() command
-	 * This function maps to "DELETE FROM table"
 	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return $this->_delete($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
 	 *
 	 * @param	string	the table name
-	 * @param	array	the where clause
-	 * @param	string	the limit clause
 	 * @return	string
 	 */
-	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	protected function _truncate($table)
 	{
-		$conditions = '';
-
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions  = "\nWHERE ";
-			$conditions .= implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= " AND ";
-			}
-
-			$conditions .= implode("\n", $like);
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		return 'DELETE FROM '.$this->_from_tables($table).$conditions.$limit;
+		return 'DELETE FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -866,15 +672,15 @@ class CI_DB_pdo_driver extends CI_DB {
 	/**
 	 * Close DB Connection
 	 *
-	 * @param	resource
+	 * @param	object
 	 * @return	void
 	 */
 	protected function _close($conn_id)
 	{
-		$this->conn_id = null;
+		$this->conn_id = NULL;
 	}
 
 }
 
 /* End of file pdo_driver.php */
-/* Location: ./system/database/drivers/pdo/pdo_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/pdo/pdo_driver.php */
diff --git a/system/database/drivers/pdo/pdo_forge.php b/system/database/drivers/pdo/pdo_forge.php
index 6bff3542f..ca8657a0f 100644
--- a/system/database/drivers/pdo/pdo_forge.php
+++ b/system/database/drivers/pdo/pdo_forge.php
@@ -34,43 +34,8 @@
  */
 class CI_DB_pdo_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _create_database()
-	{
-		// PDO has no "create database" command since it's
-		// designed to connect to an existing database
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _drop_database($name)
-	{
-		// PDO has no "drop database" command since it's
-		// designed to connect to an existing database
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_drop_database	= 'DROP DATABASE %s';
+	protected $_drop_table		= 'DROP TABLE %s';
 
 	/**
 	 * Create Table
@@ -82,7 +47,7 @@ class CI_DB_pdo_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -91,10 +56,10 @@ class CI_DB_pdo_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)
+		foreach ($fields as $field => $attributes)
 		{
 			// Numeric field names aren't allowed in databases, so if the key is
 			// numeric, we know it was assigned by PHP and the developer manually
@@ -184,23 +149,6 @@ class CI_DB_pdo_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	bool
-	 */
-	public function _drop_table($table)
-	{
-		// Not a supported PDO feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -215,7 +163,7 @@ class CI_DB_pdo_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($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);
 
@@ -250,23 +198,6 @@ class CI_DB_pdo_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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file pdo_forge.php */
diff --git a/system/database/drivers/pdo/pdo_result.php b/system/database/drivers/pdo/pdo_result.php
index 5bbd85d75..19aee1dfc 100644
--- a/system/database/drivers/pdo/pdo_result.php
+++ b/system/database/drivers/pdo/pdo_result.php
@@ -92,7 +92,6 @@ class CI_DB_pdo_result extends CI_DB_result {
 			$res_handler = 'result_'.$type;
 
 			$this->$res_handler = array();
-			$this->_data_seek(0);
 
 			while ($row = $this->$res_method())
 			{
@@ -228,22 +227,6 @@ class CI_DB_pdo_result extends CI_DB_result {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Data Seek
-	 *
-	 * 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	bool
-	 */
-	protected function _data_seek($n = 0)
-	{
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Result - associative array
 	 *
 	 * Returns the result set as an array
diff --git a/system/database/drivers/pdo/pdo_utility.php b/system/database/drivers/pdo/pdo_utility.php
index 86c798397..930842118 100644
--- a/system/database/drivers/pdo/pdo_utility.php
+++ b/system/database/drivers/pdo/pdo_utility.php
@@ -34,62 +34,7 @@
  */
 class CI_DB_pdo_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	bool
-	 */
-	public function _list_databases()
-	{
-		// Not sure if PDO lets you list all databases...
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Generates a platform-specific query so that a table can be optimized
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _optimize_table($table)
-	{
-		// Not a supported PDO feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Generates a platform-specific query so that a table can be repaired
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		// Not a supported PDO feature
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases = FALSE;
 
 	/**
 	 * PDO Export
@@ -97,7 +42,7 @@ class CI_DB_pdo_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');
diff --git a/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index 8febd62c4..d858f01ea 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -29,7 +29,7 @@
  * Postgre 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
@@ -457,47 +457,6 @@ class CI_DB_postgre_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
@@ -519,40 +478,6 @@ class CI_DB_postgre_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(', ', $values).")";
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Insert_batch statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param   string  the table name
-	 * @param   array   the insert keys
-	 * @param   array   the insert values
-	 * @return  string
-	 */
-	protected function _insert_batch($table, $keys, $values)
-	{
-		return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
@@ -560,39 +485,26 @@ class CI_DB_postgre_driver extends CI_DB {
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
 	 * @return	string
 	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
 	{
 		foreach ($values as $key => $val)
 		{
-			$valstr[] = $key." = ".$val;
+			$valstr[] = $key.' = '.$val;
 		}
 
-		$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
-		$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
-		return $sql;
-	}
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
 
-	// --------------------------------------------------------------------
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
 
-	/**
-	 * 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"
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return "TRUNCATE ".$table;
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
 	}
 
 	// --------------------------------------------------------------------
@@ -604,26 +516,18 @@ class CI_DB_postgre_driver extends CI_DB {
 	 *
 	 * @param	string	the table name
 	 * @param	array	the where clause
-	 * @param	string	the limit clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
 	 * @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);
 
-		return "DELETE FROM ".$table.$conditions;
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
 	}
 
 	// --------------------------------------------------------------------
@@ -665,4 +569,4 @@ class CI_DB_postgre_driver extends CI_DB {
 }
 
 /* End of file postgre_driver.php */
-/* Location: ./system/database/drivers/postgre/postgre_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/postgre/postgre_driver.php */
diff --git a/system/database/drivers/postgre/postgre_forge.php b/system/database/drivers/postgre/postgre_forge.php
index a72449820..8b214ebe6 100644
--- a/system/database/drivers/postgre/postgre_forge.php
+++ b/system/database/drivers/postgre/postgre_forge.php
@@ -34,31 +34,7 @@
  */
 class CI_DB_postgre_forge extends CI_DB_forge {
 
-	/**
-	 * Create database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _create_database($name)
-	{
-		return "CREATE DATABASE ".$name;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop database
-	 *
-	 * @param	string	the database name
-	 * @return	bool
-	 */
-	public function _drop_database($name)
-	{
-		return "DROP DATABASE ".$name;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_drop_table	= 'DROP TABLE IF EXISTS %s CASCADE';
 
 	/**
 	 * Process Fields
@@ -180,7 +156,7 @@ class CI_DB_postgre_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -193,8 +169,7 @@ class CI_DB_postgre_forge extends CI_DB_forge {
 			}
 		}
 
-		$sql .= $this->db->_escape_identifiers($table)." (";
-		$sql .= $this->_process_fields($fields, $primary_keys);
+		$sql .= $this->db->escape_identifiers($table).' ('.$this->_process_fields($fields, $primary_keys);
 
 		if (count($primary_keys) > 0)
 		{
@@ -235,18 +210,6 @@ class CI_DB_postgre_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE";
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -261,7 +224,7 @@ class CI_DB_postgre_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $fields, $after_field = '')
+	protected function _alter_table($alter_type, $table, $fields, $after_field = '')
  	{
  		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' ';
 
@@ -281,21 +244,6 @@ class CI_DB_postgre_forge extends CI_DB_forge {
  		return $sql;
  	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
 }
 
 /* End of file postgre_forge.php */
diff --git a/system/database/drivers/postgre/postgre_result.php b/system/database/drivers/postgre/postgre_result.php
index 394b8b6fd..f913bc9eb 100644
--- a/system/database/drivers/postgre/postgre_result.php
+++ b/system/database/drivers/postgre/postgre_result.php
@@ -128,7 +128,7 @@ class CI_DB_postgre_result extends CI_DB_result {
 	 * 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/postgre/postgre_utility.php b/system/database/drivers/postgre/postgre_utility.php
index cf29201ff..c95e6df0c 100644
--- a/system/database/drivers/postgre/postgre_utility.php
+++ b/system/database/drivers/postgre/postgre_utility.php
@@ -34,43 +34,8 @@
  */
 class CI_DB_postgre_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	string
-	 */
-	public function _list_databases()
-	{
-		return 'SELECT datname FROM pg_database';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _optimize_table($table)
-	{
-		return 'REINDEX TABLE '.$this->db->protect_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= 'SELECT datname FROM pg_database';
+	protected $_optimize_table	= 'REINDEX TABLE %s';
 
 	/**
 	 * Postgre Export
@@ -78,7 +43,7 @@ class CI_DB_postgre_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');
diff --git a/system/database/drivers/sqlite/sqlite_driver.php b/system/database/drivers/sqlite/sqlite_driver.php
index ef543c9b5..551704f83 100644
--- a/system/database/drivers/sqlite/sqlite_driver.php
+++ b/system/database/drivers/sqlite/sqlite_driver.php
@@ -29,7 +29,7 @@
  * SQLite 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
@@ -366,47 +366,6 @@ class CI_DB_sqlite_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
@@ -428,103 +387,36 @@ class CI_DB_sqlite_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Insert statement
+	 * Replace statement
 	 *
-	 * Generates a platform-specific insert string from the supplied data
+	 * Generates a platform-specific replace 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, $values)
+	protected function _replace($table, $keys, $values)
 	{
-		return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+		return 'INSERT OR '.parent::_replace($table, $keys, $values);
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @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
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key." = ".$val;
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
-
-		$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
-		$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
-		$sql .= $orderby.$limit;
-
-		return $sql;
-	}
-
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
-	 * If the database does not support the truncate() command
-	 * This function maps to "DELETE FROM table"
 	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _truncate($table)
-	{
-		return $this->_delete($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
+	 * If the database does not support the truncate() command,
+	 * then this function maps to 'DELETE FROM table'
 	 *
 	 * @param	string	the table name
-	 * @param	array	the where clause
-	 * @param	string	the limit clause
 	 * @return	string
 	 */
-	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	protected function _truncate($table)
 	{
-		$conditions = '';
-
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions = "\nWHERE ";
-			$conditions .= implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= " AND ";
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
-		return "DELETE FROM ".$table.$conditions.$limit;
+		return 'DELETE FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -569,4 +461,4 @@ class CI_DB_sqlite_driver extends CI_DB {
 }
 
 /* End of file sqlite_driver.php */
-/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */
diff --git a/system/database/drivers/sqlite/sqlite_forge.php b/system/database/drivers/sqlite/sqlite_forge.php
index 068a556ed..dd6f0f78d 100644
--- a/system/database/drivers/sqlite/sqlite_forge.php
+++ b/system/database/drivers/sqlite/sqlite_forge.php
@@ -40,7 +40,7 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
 	 * @param	string	the database name
 	 * @return	bool
 	 */
-	public function _create_database()
+	public function create_database($db_name = '')
 	{
 		// In SQLite, a database is created when you connect to the database.
 		// We'll return TRUE so that an error isn't generated
@@ -52,19 +52,16 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
 	/**
 	 * Drop database
 	 *
-	 * @param	string	the database name
+	 * @param	string	the database name (ignored)
 	 * @return	bool
 	 */
-	public function _drop_database($name)
+	public function drop_database($db_name = '')
 	{
 		if ( ! @file_exists($this->db->database) OR ! @unlink($this->db->database))
 		{
-			if ($this->db->db_debug)
-			{
-				return $this->db->display_error('db_unable_to_drop');
-			}
-			return FALSE;
+			return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
 		}
+
 		return TRUE;
 	}
 
@@ -80,7 +77,7 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -90,10 +87,10 @@ class CI_DB_sqlite_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)
+		foreach ($fields as $field => $attributes)
 		{
 			// Numeric field names aren't allowed in databases, so if the key is
 			// numeric, we know it was assigned by PHP and the developer manually
@@ -178,22 +175,6 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @return	bool
-	 */
-	public function _drop_table($table)
-	{
-		if ($this->db->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-		return array();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -208,7 +189,7 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($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);
 
@@ -246,22 +227,6 @@ class CI_DB_sqlite_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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
-
 }
 
 /* End of file sqlite_forge.php */
diff --git a/system/database/drivers/sqlite/sqlite_result.php b/system/database/drivers/sqlite/sqlite_result.php
index 4af80abf7..741dc9d8d 100644
--- a/system/database/drivers/sqlite/sqlite_result.php
+++ b/system/database/drivers/sqlite/sqlite_result.php
@@ -112,7 +112,7 @@ class CI_DB_sqlite_result extends CI_DB_result {
 	 * 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/sqlite/sqlite_utility.php b/system/database/drivers/sqlite/sqlite_utility.php
index c07004c54..1bcb42d9f 100644
--- a/system/database/drivers/sqlite/sqlite_utility.php
+++ b/system/database/drivers/sqlite/sqlite_utility.php
@@ -34,50 +34,7 @@
  */
 class CI_DB_sqlite_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * I don't believe you can do a database listing with SQLite
-	 * since each database is its own file. I suppose we could
-	 * try reading a directory looking for SQLite files, but
-	 * that doesn't seem like a terribly good idea
-	 *
-	 * @return	bool
-	 */
-	public function _list_databases()
-	{
-		return ($this->db_debug) ? $this->db->display_error('db_unsuported_feature') : FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _optimize_table($table)
-	{
-		// Not supported
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _repair_table($table)
-	{
-		// Not supported
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= FALSE;
 
 	/**
 	 * SQLite Export
@@ -85,7 +42,7 @@ class CI_DB_sqlite_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');
diff --git a/system/database/drivers/sqlite3/sqlite3_driver.php b/system/database/drivers/sqlite3/sqlite3_driver.php
index de3705296..d22f6a442 100644
--- a/system/database/drivers/sqlite3/sqlite3_driver.php
+++ b/system/database/drivers/sqlite3/sqlite3_driver.php
@@ -2,7 +2,7 @@
 /**
  * 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
  *
@@ -16,12 +16,12 @@
  * through the world wide web, please send an email to
  * licensing@ellislab.com so we can send you a copy immediately.
  *
- * @package	CodeIgniter
- * @author	EllisLab Dev Team
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
  * @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
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -29,14 +29,15 @@
  * SQLite3 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
+ * @package		CodeIgniter
  * @subpackage	Drivers
  * @category	Database
- * @author	Andrey Andreev
- * @link	http://codeigniter.com/user_guide/database/
+ * @author		Andrey Andreev
+ * @link		http://codeigniter.com/user_guide/database/
+ * @since		Version 3.0
  */
 class CI_DB_sqlite3_driver extends CI_DB {
 
@@ -341,43 +342,6 @@ class CI_DB_sqlite3_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)
-			{
-				$item = str_replace('.', $this->_escape_char.'.', $item);
-
-				// remove duplicates if the user already included the escape
-				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
-			}
-		}
-
-		if (strpos($item, '.') !== FALSE)
-		{
-			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
-		}
-
-		// remove duplicates if the user already included the escape
-		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -399,45 +363,18 @@ class CI_DB_sqlite3_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Insert statement
+	 * Replace statement
 	 *
-	 * Generates a platform-specific insert string from the supplied data
+	 * Generates a platform-specific replace 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, $values)
+	protected function _replace($table, $keys, $values)
 	{
-		return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key.' = '.$val;
-		}
-
-		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.( ! $limit ? '' : ' LIMIT '.$limit);
+		return 'INSERT OR '.parent::_replace($table, $keys, $values);
 	}
 
 	// --------------------------------------------------------------------
@@ -446,44 +383,16 @@ class CI_DB_sqlite3_driver extends CI_DB {
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
-	 * 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 $this->_delete($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete statement
-	 *
-	 * Generates a platform-specific delete string from the supplied data
+	 * If the database does not support the truncate() command, then,
+	 * then this method maps to 'DELETE FROM table'
 	 *
 	 * @param	string	the table name
-	 * @param	array	the where clause
-	 * @param	string	the limit clause
 	 * @return	string
 	 */
-	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	protected function _truncate($table)
 	{
-		$conditions = '';
-		if (count($where) > 0 OR count($like) > 0)
-		{
-			$conditions .= "\nWHERE ".implode("\n", $this->ar_where);
-
-			if (count($where) > 0 && count($like) > 0)
-			{
-				$conditions .= ' AND ';
-			}
-			$conditions .= implode("\n", $like);
-		}
-
-		return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
+		return 'DELETE FROM '.$table;
 	}
 
 	// --------------------------------------------------------------------
@@ -508,9 +417,10 @@ class CI_DB_sqlite3_driver extends CI_DB {
 	/**
 	 * Close DB Connection
 	 *
+	 * @param	object (ignored)
 	 * @return	void
 	 */
-	protected function _close()
+	protected function _close($conn_id)
 	{
 		$this->conn_id->close();
 	}
diff --git a/system/database/drivers/sqlite3/sqlite3_forge.php b/system/database/drivers/sqlite3/sqlite3_forge.php
index 254db21d8..20f1e6f63 100644
--- a/system/database/drivers/sqlite3/sqlite3_forge.php
+++ b/system/database/drivers/sqlite3/sqlite3_forge.php
@@ -16,12 +16,12 @@
  * through the world wide web, please send an email to
  * licensing@ellislab.com so we can send you a copy immediately.
  *
- * @package	CodeIgniter
- * @author	EllisLab Dev Team
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
  * @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
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -40,7 +40,7 @@ class CI_DB_sqlite3_forge extends CI_DB_forge {
 	 * @param	string	the database name
 	 * @return	bool
 	 */
-	public function _create_database()
+	public function create_database($db_name = '')
 	{
 		// In SQLite, a database is created when you connect to the database.
 		// We'll return TRUE so that an error isn't generated
@@ -52,10 +52,10 @@ class CI_DB_sqlite3_forge extends CI_DB_forge {
 	/**
 	 * Drop database
 	 *
-	 * @param	string	the database name
+	 * @param	string	the database name (ignored)
 	 * @return	bool
 	 */
-	public function _drop_database($name)
+	public function drop_database($db_name = '')
 	{
 		// In SQLite, a database is dropped when we delete a file
 		if (@file_exists($this->db->database))
@@ -85,7 +85,7 @@ class CI_DB_sqlite3_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -95,10 +95,10 @@ class CI_DB_sqlite3_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)
+		foreach ($fields as $field => $attributes)
 		{
 			// Numeric field names aren't allowed in databases, so if the key is
 			// numeric, we know it was assigned by PHP and the developer manually
@@ -156,19 +156,6 @@ class CI_DB_sqlite3_forge extends CI_DB_forge {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Drop Table
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	public function _drop_table($table)
-	{
-		return 'DROP TABLE '.$table.' IF EXISTS';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Alter table query
 	 *
 	 * Generates a platform-specific query so that a table can be altered
@@ -183,7 +170,7 @@ class CI_DB_sqlite3_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 = '', $after_field = '')
 	{
 		/* SQLite only supports adding new columns and it does
 		 * NOT support the AFTER statement. Each new column will
@@ -202,21 +189,6 @@ class CI_DB_sqlite3_forge extends CI_DB_forge {
 			.(($null !== NULL && $default_value !== 'NULL') ? ' NOT NULL' : ' NULL');
 	}
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * 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, $new_table_name)
-	{
-		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
-	}
 }
 
 /* End of file sqlite3_forge.php */
diff --git a/system/database/drivers/sqlite3/sqlite3_result.php b/system/database/drivers/sqlite3/sqlite3_result.php
index ddf59dbd0..d83d6b2cd 100644
--- a/system/database/drivers/sqlite3/sqlite3_result.php
+++ b/system/database/drivers/sqlite3/sqlite3_result.php
@@ -16,12 +16,12 @@
  * through the world wide web, please send an email to
  * licensing@ellislab.com so we can send you a copy immediately.
  *
- * @package	CodeIgniter
- * @author	EllisLab Dev Team
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
  * @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
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -198,8 +198,6 @@ class CI_DB_sqlite3_result extends CI_DB_result {
 			$this->row_data[$row_index++] = $row;
 		}
 
-		// Un-comment the following line, in case it becomes needed
-		// $this->_data_seek();
 		return $this->result_array = $this->row_data;
 	}
 
@@ -266,8 +264,6 @@ class CI_DB_sqlite3_result extends CI_DB_result {
 			$this->num_rows = count($this->result_object);
 		}
 
-		// Un-comment the following line, in case it becomes needed
-		// $this->_data_seek();
 		return $this->result_object;
 	}
 
diff --git a/system/database/drivers/sqlite3/sqlite3_utility.php b/system/database/drivers/sqlite3/sqlite3_utility.php
index a4dc875e1..965c838e5 100644
--- a/system/database/drivers/sqlite3/sqlite3_utility.php
+++ b/system/database/drivers/sqlite3/sqlite3_utility.php
@@ -16,12 +16,12 @@
  * through the world wide web, please send an email to
  * licensing@ellislab.com so we can send you a copy immediately.
  *
- * @package	CodeIgniter
- * @author	EllisLab Dev Team
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
  * @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
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -34,56 +34,7 @@
  */
 class CI_DB_sqlite3_utility extends CI_DB_utility {
 
-	/**
-	 * List databases
-	 *
-	 * @return	bool
-	 */
-	public function _list_databases()
-	{
-		// Not supported
-		return FALSE;
-
-		// Do we use this?
-		if ($this->db_debug)
-		{
-			return $this->db->display_error('db_unsuported_feature');
-		}
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Optimize table query
-	 *
-	 * Is optimization even supported in SQLite?
-	 *
-	 * @param	string	the table name
-	 * @return	bool
-	 */
-	public function _optimize_table($table)
-	{
-		// Not supported
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Repair table query
-	 *
-	 * Are table repairs even supported in SQLite?
-	 *
-	 * @param	string	the table name
-	 * @return	object
-	 */
-	public function _repair_table($table)
-	{
-		// Not supported
-		return FALSE;
-	}
-
-	// --------------------------------------------------------------------
+	protected $_list_databases	= FALSE;
 
 	/**
 	 * SQLite Export
@@ -91,7 +42,7 @@ class CI_DB_sqlite3_utility extends CI_DB_utility {
 	 * @param	array	Preferences
 	 * @return	mixed
 	 */
-	public function _backup($params = array())
+	protected function _backup($params = array())
 	{
 		// Not supported
 		return $this->db->display_error('db_unsuported_feature');
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index bb4f009bc..8cc500f55 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -29,7 +29,7 @@
  * 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
@@ -393,21 +393,6 @@ class CI_DB_sqlsrv_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Escape the SQL Identifiers
-	 *
-	 * This function escapes column and table names
-	 *
-	 * @param	string
-	 * @return	string
-	 */
-	public function _escape_identifiers($item)
-	{
-		return $item;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
@@ -429,23 +414,6 @@ class CI_DB_sqlsrv_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(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
@@ -453,18 +421,26 @@ class CI_DB_sqlsrv_driver extends CI_DB {
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
 	 * @return	string
 	 */
-	protected function _update($table, $values, $where)
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
 	{
 		foreach($values as $key => $val)
 		{
-			$valstr[] = $key." = ".$val;
+			$valstr[] = $key.' = '.$val;
 		}
 
-		return 'UPDATE '.$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;
 	}
 
 	// --------------------------------------------------------------------
@@ -473,15 +449,16 @@ class CI_DB_sqlsrv_driver extends CI_DB {
 	 * 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;
 	}
 
 	// --------------------------------------------------------------------
@@ -493,12 +470,22 @@ class CI_DB_sqlsrv_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, $where)
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
 	{
-		return 'DELETE FROM '.$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;
 	}
 
 	// --------------------------------------------------------------------
@@ -534,4 +521,4 @@ class CI_DB_sqlsrv_driver extends CI_DB {
 }
 
 /* End of file sqlsrv_driver.php */
-/* Location: ./system/database/drivers/sqlsrv/sqlsrv_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/sqlsrv/sqlsrv_driver.php */
diff --git a/system/database/drivers/sqlsrv/sqlsrv_forge.php b/system/database/drivers/sqlsrv/sqlsrv_forge.php
index 0dc7b5242..e9143b269 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_forge.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_forge.php
@@ -34,43 +34,7 @@
  */
 class CI_DB_sqlsrv_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	bool
-	 */
-	public function _drop_database($name)
-	{
-		return "DROP DATABASE ".$name;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Drop Table
-	 *
-	 * @return	bool
-	 */
-	public function _drop_table($table)
-	{
-		return "DROP TABLE ".$this->db->_escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
+	protected $_drop_table	= 'DROP TABLE %s';
 
 	/**
 	 * Create Table
@@ -82,7 +46,7 @@ class CI_DB_sqlsrv_forge extends CI_DB_forge {
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	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 ';
 
@@ -91,7 +55,7 @@ class CI_DB_sqlsrv_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 => $attributes)
@@ -193,7 +157,7 @@ class CI_DB_sqlsrv_forge extends CI_DB_forge {
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($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);
 
@@ -228,23 +192,6 @@ class CI_DB_sqlsrv_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 sqlsrv_forge.php */
diff --git a/system/database/drivers/sqlsrv/sqlsrv_result.php b/system/database/drivers/sqlsrv/sqlsrv_result.php
index 10d790e4b..0802677fc 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_result.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_result.php
@@ -124,22 +124,6 @@ class CI_DB_sqlsrv_result extends CI_DB_result {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Data Seek
-	 *
-	 * 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	void
-	 */
-	protected function _data_seek($n = 0)
-	{
-		// Not implemented
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Result - associative array
 	 *
 	 * Returns the result set as an array
diff --git a/system/database/drivers/sqlsrv/sqlsrv_utility.php b/system/database/drivers/sqlsrv/sqlsrv_utility.php
index 5830c62de..394964b6a 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_utility.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_utility.php
@@ -34,55 +34,16 @@
  */
 class CI_DB_sqlsrv_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
+	 * SQLSRV Export
 	 *
 	 * @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');