r8710: new backend

[clsql.git] / db-sqlite / sqlite-usql.lisp

diff --git a/db-sqlite/sqlite-usql.lisp b/db-sqlite/sqlite-usql.lisp
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+++ b/db-sqlite/sqlite-usql.lisp
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+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          sqlite-usql.lisp
+;;;; Purpose:       SQLite interface for USQL routines
+;;;; Programmers:   Aurelio Bignoli
+;;;; Date Started:  Aug 2003
+;;;;
+;;;; $Id: sqlite-usql.lisp,v 1.3 2004/03/09 20:58:38 aurelio Exp $
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2003 by Aurelio Bignoli
+;;;;
+;;;; 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-sqlite)
+
+(defun %sequence-name-to-table-name (sequence-name)
+  (concatenate 'string "_usql_seq_" (sql-escape sequence-name)))
+
+(defmethod database-create-sequence (sequence-name
+                                    (database sqlite-database))
+  (let ((table-name (%sequence-name-to-table-name sequence-name)))
+    (database-execute-command
+     (concatenate 'string "CREATE TABLE " table-name
+                 " (id INTEGER PRIMARY KEY)")
+     database)
+    (database-execute-command 
+     (format nil "INSERT INTO ~A VALUES (-1)" table-name)
+     database)))
+
+(defmethod database-drop-sequence (sequence-name
+                                  (database sqlite-database))
+  (database-execute-command
+   (concatenate 'string "DROP TABLE "
+               (%sequence-name-to-table-name sequence-name)) 
+   database))
+
+(defmethod database-sequence-next (sequence-name (database sqlite-database))
+  (let ((table-name (%sequence-name-to-table-name sequence-name)))
+    (database-execute-command
+     (format nil "UPDATE ~A SET id=(SELECT id FROM ~A)+1"
+            table-name table-name)
+     database))
+  (sqlite:sqlite-last-insert-rowid (sqlite-db database)))
+
+(defmethod database-list-tables ((database sqlite-database) &key system-tables)
+  (declare (ignore system-tables))
+  ;; Query is copied from .table command of sqlite comamnd line utility.
+  (mapcar #'car (database-query
+                "SELECT name FROM sqlite_master WHERE type='table' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='table' ORDER BY name"
+                database '())))
+
+(declaim (inline sqlite-table-info))
+(defun sqlite-table-info (table database)
+  (database-query (format nil "PRAGMA table_info('~A')" table)
+                         database '()))
+
+(defmethod database-list-attributes (table (database sqlite-database))
+  (mapcar #'(lambda (table-info) (third table-info))
+         (sqlite-table-info table database)))
+
+(defmethod database-attribute-type (attribute table 
+                                   (database sqlite-database))
+  (loop for field-info in (sqlite-table-info table database)
+       when (string= attribute (second field-info))
+       return (third field-info)))