r8973: add makefiles, remove explain function, fix truncate

[clsql.git] / base / database.lisp

diff --git a/base/database.lisp b/base/database.lisp
index 839204f3c57de01fde008441a32a6b1d858cf2f3..1c6fa63ee82fc12911175575a755470b3e8854aa 100644 (file)
--- a/base/database.lisp
+++ b/base/database.lisp
@@ -1,7 +1,16 @@
 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
 ;;;; *************************************************************************
 ;;;;
-;;;; $Id: $
+;;;; $Id$
+;;;;
+;;;; Base database functions
+;;;;
+;;;; This file is part of CLSQL.
+;;;;
+;;;; 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-base-sys)
 
@@ -23,7 +32,9 @@
 (defvar *default-database* nil
   "Specifies the default database to be used.")
 
-;;; usql
+(defun is-database-open (database)
+  (eql (database-state database) :open))
+
 (defun find-database (database &key (errorp t) (db-type nil))
   "The function FIND-DATABASE, given a string DATABASE, searches
 amongst the connected databases for one matching the name DATABASE. If
@@ -73,6 +84,16 @@ connection.  If make-default is true, then *default-database* is set
 to the new connection, otherwise *default-database is not changed. If
 pool is t the connection will be taken from the general pool, if pool
 is a conn-pool object the connection will be taken from this pool."
+
+  (when (stringp connection-spec)
+    (setq connection-spec (string-to-list-connection-spec connection-spec)))
+  
+  (unless (member database-type *loaded-database-types*)
+    (asdf:operate 'asdf:load-op (ensure-keyword
+                                (concatenate 'string 
+                                             (symbol-name '#:clsql-)
+                                             (symbol-name database-type)))))
+
   (if pool
       (acquire-from-pool connection-spec database-type pool)
       (let* ((db-name (database-name-from-spec connection-spec database-type))
@@ -104,6 +125,7 @@ is a conn-pool object the connection will be taken from this pool."
             (setq result
                   (database-connect connection-spec database-type)))
         (when result
+         (setf (slot-value result 'state) :open)
           (pushnew result *connected-databases*)
           (when make-default (setq *default-database* result))
           result))))
@@ -131,7 +153,7 @@ this pool."
             (setf *connected-databases* (delete database *connected-databases*))
             (when (eq database *default-database*)
               (setf *default-database* (car *connected-databases*)))
-            (change-class database 'closed-database)
+            (setf (slot-value database 'state) :closed)
             t)))))
 
 
@@ -154,10 +176,10 @@ error should be signaled if the existing database connection cannot be
 closed. When non-nil (this is the default value) the connection is
 closed without error checking. When FORCE is nil, an error is signaled
 if the database connection has been lost."
-  ;; TODO: just a placeholder
+  ;; TODO: Support all backends. Perhaps integrate with pools
+  ;; Handle error and force keywords
   (declare (ignore database error force)))
 
-
   
 (defun status (&optional full)
   "The function STATUS prints status information to the standard
@@ -194,6 +216,21 @@ of full is NIL."
           (print-separator total-size))))
     (values)))
 
+(defun create-database (connection-spec &key database-type)
+  (when (stringp connection-spec)
+    (setq connection-spec (string-to-list-connection-spec connection-spec)))
+  (database-create connection-spec database-type))
+
+(defun probe-database (connection-spec &key database-type)
+  (when (stringp connection-spec)
+    (setq connection-spec (string-to-list-connection-spec connection-spec)))
+  (database-probe connection-spec database-type))
+
+(defun destroy-database (connection-spec &key database-type)
+  (when (stringp connection-spec)
+    (setq connection-spec (string-to-list-connection-spec connection-spec)))
+  (database-destroy connection-spec database-type))
+
 
 (defmacro with-database ((db-var connection-spec &rest connect-args) &body body)
   "Evaluate the body in an environment, where `db-var' is bound to the
@@ -215,3 +252,4 @@ The connection is automatically closed or released to the pool on exit from the
   `(progv '(*default-database*)
        (list ,database)
      ,@body))
+