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+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          base-classes.lisp
+;;;; Purpose:       Base classes for high-level SQL interface
+;;;; Programmers:   Kevin M. Rosenberg based on
+;;;;                 original code by Pierre R. Mai
+;;;; Date Started:  Feb 2002
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
+;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
+;;;;
+;;;; CLSQL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(in-package #:clsql-sys)
+
+
+(defclass database ()
+  ((name :initform nil :initarg :name :reader database-name)
+   (connection-spec :initform nil :initarg :connection-spec
+                    :reader connection-spec
+                    :documentation "Required to use connection pool.")
+   (database-type :initarg :database-type :initform :unknown
+                  :reader database-type)
+   (encoding :initarg :encoding :initform nil
+             :documentation "External format character encoding.")
+   (state :initform :closed :reader database-state)
+   (autocommit :initform t :accessor database-autocommit)
+   (command-recording-stream :accessor command-recording-stream :initform nil)
+   (result-recording-stream :accessor result-recording-stream :initform nil)
+   (record-caches :accessor record-caches :initform nil)
+   (view-classes :accessor database-view-classes :initform nil)
+   (transaction-level :initform 0 :accessor transaction-level)
+   (transaction :initform nil :accessor transaction)
+   (conn-pool :initform nil :initarg :conn-pool :accessor conn-pool)
+   (attribute-cache :initform (make-hash-table :size 100 :test 'equal)
+                    :accessor attribute-cache
+                    :documentation "Internal cache of table attributes. It is keyed by table-name. Values
+are a list of ACTION specified for table and any cached value of list-attributes-types."))
+  (:documentation
+   "This class is the supertype of all databases handled by CLSQL."))
+
+(defmethod print-object ((object database) stream)
+  (print-unreadable-object (object stream :type t :identity t)
+    (format stream "~A ~A"
+            (if (slot-boundp object 'name)
+                (database-name object)
+              "<unbound>")
+            (database-state object)))
+  object)
+
+(setf (documentation 'database-name 'function)
+      "Returns the name of a database.")