diff --git a/src/databases/db_pdo.php b/src/databases/db_pdo.php
index 5734713..accb3d4 100644
--- a/src/databases/db_pdo.php
+++ b/src/databases/db_pdo.php
@@ -112,6 +112,7 @@ abstract class DB_PDO extends PDO {
 	 * Abstract functions to override in child classes
 	 */
 	abstract function get_tables();
+	abstract function truncate($table);
 
 }
 // End of db_pdo.php
\ No newline at end of file
diff --git a/src/databases/firebird.php b/src/databases/firebird.php
index 9c1294c..aa363be 100644
--- a/src/databases/firebird.php
+++ b/src/databases/firebird.php
@@ -66,6 +66,26 @@ class firebird {
 		return $this->statement;
 	}
 
+	/**
+	 * Emulate PDO fetch function
+	 * 
+	 * @return mixed
+	 */
+	function fetch()
+	{
+		//TODO implement
+	}
+
+	/**
+	 * Emulate PDO fetchAll function
+	 * 
+	 * @return mixed
+	 */
+	function fetchAll()
+	{
+		//TODO implement
+	}
+
 	/**
 	 * List tables for the current database
 	 * 
@@ -73,7 +93,8 @@ class firebird {
 	 */
 	function get_tables()
 	{	
-		//TODO: implement
+		$sql="SELECT rdb\$relation_name FROM rdb\$relations WHERE rdb\$relation_name NOT LIKE 'RDB\$%'";
+		$res = $this->query($sql);
 	}
 	 
 }
diff --git a/src/databases/mysql.php b/src/databases/mysql.php
index a1ba70d..ac1e134 100644
--- a/src/databases/mysql.php
+++ b/src/databases/mysql.php
@@ -44,8 +44,18 @@ class MySQL extends DB_PDO {
 	 */
 	function truncate($table)
 	{
-		$sql = "TRUNCATE `{$table}`";
-		$this->query($sql);
+		$this->query("TRUNCATE `{$table}`");
+	}
+
+	/**
+	 * Get databases for the current connection
+	 * 
+	 * @return array
+	 */
+	function get_dbs()
+	{
+		$res = $this->query("SHOW DATABASES");
+		return $this->fetchAll(PDO::FETCH_ASSOC);
 	}
 
 	/**
@@ -55,9 +65,7 @@ class MySQL extends DB_PDO {
 	 */
 	function get_tables()
 	{
-		$sql = "SHOW TABLES";
-		$res = $this->query($sql);
-
+		$res = $this->query("SHOW TABLES");
 		return $res->fetchAll(PDO::FETCH_ASSOC);
 	}
 
diff --git a/src/databases/odbc.php b/src/databases/odbc.php
index 4c1af81..17c4a03 100644
--- a/src/databases/odbc.php
+++ b/src/databases/odbc.php
@@ -37,6 +37,17 @@ class ODBC extends DB_PDO {
 		return FALSE;
 	}
 
+	/**
+	 * Empty the current database
+	 * 
+	 * @return void
+	 */
+	function truncate($table)
+	{
+		$sql = "DELETE FROM {$table}";
+		$this->query($sql);
+	}
+
 }
 
 // End of odbc.php
\ No newline at end of file
diff --git a/src/databases/sqlite.php b/src/databases/sqlite.php
index 822042b..525b4b7 100644
--- a/src/databases/sqlite.php
+++ b/src/databases/sqlite.php
@@ -81,8 +81,6 @@ class SQLite_manip extends SQLite {
 				$colname = $type;
 			}
 		}
-
-
 	}
 
 	/**