improved and moved command object up to clsql (out of cl-postgres-socket3)

[clsql.git] / sql / command-object.lisp

diff --git a/sql/command-object.lisp b/sql/command-object.lisp
new file mode 100644 (file)
index 0000000..3b752ef
--- /dev/null
+++ b/sql/command-object.lisp
@@ -0,0 +1,58 @@
+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:     postgresql-socket-sql.sql
+;;;; Purpose:  High-level PostgreSQL interface using socket
+;;;; Authors:  Russ Tyndall (at Acceleration.net) based on original code by
+;;;;           Kevin M. Rosenberg based on original code by Pierre R. Mai
+;;;; Created:  Sep 2009
+;;;;
+;;;;
+;;;; $Id$
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2002-2007 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 command-object ()
+  ((expression :accessor expression :initarg :expression :initform nil)
+   (parameters :accessor parameters :initarg :parameters :initform nil)
+   (prepared-name :accessor prepared-name :initarg :prepared-name :initform ""
+    :documentation "If we want this to be a prepared statement, give it a name
+       to identify it to this session")
+   (has-been-prepared :accessor has-been-prepared :initarg :has-been-prepared :initform nil
+                     :documentation "Have we already prepared this command object")
+   ))
+
+(defmethod initialize-instance :after ((o command-object) &key &allow-other-keys )
+  ;; Inits parameter nulls
+  (setf (parameters o) (parameters o)))
+
+(defmethod (setf parameters) (new (o command-object))
+  " This causes the semantics to match cl-sql instead of cl-postgresql
+  "
+  (setf (slot-value o 'parameters)
+       (loop for p in new
+             collecting (cond ((null p) :null)
+                              ((member p (list :false :F)) nil)
+                              (T p)))))
+
+(defun reset-command-object (co)
+  "Resets the command object to have no name and to be unprepared
+     (This is useful if you want to run a command against a second database)"
+  (setf (prepared-name co) ""
+       (has-been-prepared co) nil))
+
+(defun command-object (expression &optional parameters (prepared-name ""))
+  (make-instance 'command-object
+                :expression expression
+                :parameters parameters
+                :prepared-name prepared-name))