diff --git a/system/database/drivers/cubrid/cubrid_forge.php b/system/database/drivers/cubrid/cubrid_forge.php
index 2a19298..b6c6a3b 100644
--- a/system/database/drivers/cubrid/cubrid_forge.php
+++ b/system/database/drivers/cubrid/cubrid_forge.php
@@ -92,6 +92,13 @@
 		'REAL'		=> 'DOUBLE'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/ibase/ibase_forge.php b/system/database/drivers/ibase/ibase_forge.php
index 73968bd..3cab264 100644
--- a/system/database/drivers/ibase/ibase_forge.php
+++ b/system/database/drivers/ibase/ibase_forge.php
@@ -85,6 +85,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/mssql/mssql_forge.php b/system/database/drivers/mssql/mssql_forge.php
index 8d98093..315ca4b 100644
--- a/system/database/drivers/mssql/mssql_forge.php
+++ b/system/database/drivers/mssql/mssql_forge.php
@@ -74,6 +74,13 @@
 		'REAL'		=> 'FLOAT'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/oci8/oci8_forge.php b/system/database/drivers/oci8/oci8_forge.php
index 433692d..c1c5f11 100644
--- a/system/database/drivers/oci8/oci8_forge.php
+++ b/system/database/drivers/oci8/oci8_forge.php
@@ -74,6 +74,13 @@
 	 */
 	protected $_unsigned		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/odbc/odbc_forge.php b/system/database/drivers/odbc/odbc_forge.php
index d78bc36..00cb00b 100644
--- a/system/database/drivers/odbc/odbc_forge.php
+++ b/system/database/drivers/odbc/odbc_forge.php
@@ -69,6 +69,13 @@
 	 */
 	protected $_unsigned		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php b/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php
index 8402974..1852c8f 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php
@@ -100,6 +100,13 @@
 	 */
 	protected $_default		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php
index cc8d462..89db1c3 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php
@@ -92,6 +92,13 @@
 		'REAL'		=> 'DOUBLE'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php
index c0ee490..d9c766e 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php
@@ -72,6 +72,13 @@
 		'REAL'		=> 'FLOAT'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php
index 87f1586..358f093 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php
@@ -71,6 +71,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php b/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php
index 3227602..043f77f 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php
@@ -71,6 +71,13 @@
 	 */
 	protected $_default		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php b/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php
index 9a6e9c8..393b64e 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php
@@ -73,6 +73,13 @@
 	 */
 	protected $_default		= ', ';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php b/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php
index d4f33e1..895aec4 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php
@@ -74,6 +74,13 @@
 	 */
 	protected $_unsigned		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php
index a9ff67f..083cfbc 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php
@@ -53,6 +53,13 @@
 	 */
 	protected $_unsigned		= FALSE;
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php
index 00579aa..19497bb 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php
@@ -77,6 +77,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php
index f7bd99e..81c8594 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php
@@ -74,6 +74,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php
index b0b08a1..7adeda8 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php
@@ -72,6 +72,13 @@
 		'REAL'		=> 'FLOAT'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/postgre/postgre_forge.php b/system/database/drivers/postgre/postgre_forge.php
index 1dcd027..7db9e50 100644
--- a/system/database/drivers/postgre/postgre_forge.php
+++ b/system/database/drivers/postgre/postgre_forge.php
@@ -72,6 +72,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/sqlite/sqlite_forge.php b/system/database/drivers/sqlite/sqlite_forge.php
index 8594842..036b607 100644
--- a/system/database/drivers/sqlite/sqlite_forge.php
+++ b/system/database/drivers/sqlite/sqlite_forge.php
@@ -67,6 +67,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/sqlite3/sqlite3_forge.php b/system/database/drivers/sqlite3/sqlite3_forge.php
index a527e51..df05548 100644
--- a/system/database/drivers/sqlite3/sqlite3_forge.php
+++ b/system/database/drivers/sqlite3/sqlite3_forge.php
@@ -60,6 +60,13 @@
 	 */
 	protected $_null		= 'NULL';
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/drivers/sqlsrv/sqlsrv_forge.php b/system/database/drivers/sqlsrv/sqlsrv_forge.php
index 0f1da1d..ab05718 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_forge.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_forge.php
@@ -72,6 +72,13 @@
 		'REAL'		=> 'FLOAT'
 	);
 
+	/**
+	 * COMMENT value representation in CREATE/ALTER TABLE statements
+	 *
+	 * @var	string
+	 */
+	protected $_comment			= FALSE;
+
 	// --------------------------------------------------------------------
 
 	/**