Fixed issue #150 (for mysql and mysqli), now returns the actual column length.
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index 8725045..f87cfea 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -441,7 +441,7 @@
 	 */
 	function _field_data($table)
 	{
-		return "SELECT * FROM ".$table." LIMIT 1";
+		return "DESCRIBE ".$table;
 	}
 
 	// --------------------------------------------------------------------