1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
6 ;;;; Purpose: Low-level interface for CLSQL ODBC backend
7 ;;;; Programmer: Kevin M. Rosenberg
8 ;;;; Date Started: Feb 2002
10 ;;;; $Id: odbc-sql.lisp 8983 2004-04-12 21:16:48Z kevin $
12 ;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
14 ;;;; CLSQL users are granted the rights to distribute and use this software
15 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
16 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
17 ;;;; *************************************************************************
19 (defpackage #:clsql-odbc
20 (:use #:common-lisp #:clsql-sys)
21 (:export #:odbc-database)
22 (:documentation "This is the CLSQL interface to ODBC."))
24 (in-package #:clsql-odbc)
28 (defclass odbc-database (generic-odbc-database)
29 ((odbc-db-type :accessor database-odbc-db-type)))
31 (defmethod database-name-from-spec (connection-spec
32 (database-type (eql :odbc)))
33 (check-connection-spec connection-spec database-type (dsn user password))
34 (destructuring-bind (dsn user password) connection-spec
35 (declare (ignore password))
36 (concatenate 'string dsn "/" user)))
38 (defmethod database-connect (connection-spec (database-type (eql :odbc)))
39 (check-connection-spec connection-spec database-type (dsn user password))
40 (destructuring-bind (dsn user password) connection-spec
42 (let ((db (make-instance 'odbc-database
43 :name (database-name-from-spec connection-spec :odbc)
45 :dbi-package (find-package '#:odbc-dbi)
47 (odbc-dbi:connect :user user
49 :data-source-name dsn))))
50 (store-type-of-connected-database db)
52 (error () ;; Init or Connect failed
53 (error 'sql-connection-error
54 :database-type database-type
55 :connection-spec connection-spec
56 :message "Connection failed")))))
58 (defmethod database-underlying-type ((database odbc-database))
59 (database-odbc-db-type database))
61 (defun store-type-of-connected-database (db)
62 (let* ((odbc-conn (clsql-sys::odbc-conn db))
63 (server-name (odbc-dbi::get-odbc-info odbc-conn odbc::$SQL_SERVER_NAME))
64 (dbms-name (odbc-dbi::get-odbc-info odbc-conn odbc::$SQL_DBMS_NAME))
66 ;; need SERVER-NAME and DBMS-NAME because many drivers mix this up
68 ((or (search "postgresql" server-name :test #'char-equal)
69 (search "postgresql" dbms-name :test #'char-equal))
71 ((or (search "mysql" server-name :test #'char-equal)
72 (search "mysql" dbms-name :test #'char-equal))
74 ((or (search "oracle" server-name :test #'char-equal)
75 (search "oracle" dbms-name :test #'char-equal))
77 (setf (database-odbc-db-type db) type)))
82 ;;; Sequence functions
84 (defun %sequence-name-to-table (sequence-name)
85 (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
87 (defun %table-name-to-sequence-name (table-name)
88 (and (>= (length table-name) 11)
89 (string-equal (subseq table-name 0 11) "_CLSQL_SEQ_")
90 (subseq table-name 11)))
92 (defmethod database-create-sequence (sequence-name
93 (database odbc-database))
94 (let ((table-name (%sequence-name-to-table sequence-name)))
95 (database-execute-command
96 (concatenate 'string "CREATE TABLE " table-name
97 " (last_value int NOT NULL PRIMARY KEY, increment_by int, min_value int, is_called char(1))")
99 (database-execute-command
100 (concatenate 'string "INSERT INTO " table-name
101 " VALUES (1,1,1,'f')")
104 (defmethod database-drop-sequence (sequence-name
105 (database odbc-database))
106 (database-execute-command
107 (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name))
110 (defmethod database-list-sequences ((database odbc-database)
112 (declare (ignore owner))
113 ;; FIXME: Underlying database backend stuff should come from that backend
115 (case (database-odbc-db-type database)
117 (mapcan #'(lambda (s)
118 (let ((sn (%table-name-to-sequence-name (car s))))
120 (database-query "SHOW TABLES" database nil nil)))
121 ((:postgresql :postgresql-socket)
122 (mapcar #'(lambda (s) (%table-name-to-sequence-name (car s)))
123 (database-query "SELECT RELNAME FROM pg_class WHERE RELNAME LIKE '%clsql_seq%'"
124 database nil nil)))))
127 (defmethod database-set-sequence-position (sequence-name
129 (database odbc-database))
130 (database-execute-command
131 (format nil "UPDATE ~A SET last_value=~A,is_called='t'"
132 (%sequence-name-to-table sequence-name)
137 (defmethod database-sequence-next (sequence-name (database odbc-database))
139 (let* ((table-name (%sequence-name-to-table sequence-name))
142 (concatenate 'string "SELECT last_value,is_called FROM "
144 database :auto nil))))
146 ((char-equal (schar (second tuple) 0) #\f)
147 (database-execute-command
148 (format nil "UPDATE ~A SET is_called='t'" table-name)
152 (let ((new-pos (1+ (car tuple))))
153 (database-execute-command
154 (format nil "UPDATE ~A SET last_value=~D" table-name new-pos)
158 (defmethod database-sequence-last (sequence-name (database odbc-database))
160 (caar (database-query
161 (concatenate 'string "SELECT last_value FROM "
162 (%sequence-name-to-table sequence-name))
163 database :auto nil))))
165 (defmethod database-create (connection-spec (type (eql :odbc)))
166 (declare (ignore connection-spec))
167 (warn "Not implemented."))
169 (defmethod database-destroy (connection-spec (type (eql :odbc)))
170 (declare (ignore connection-spec))
171 (warn "Not implemented."))
173 (defmethod database-probe (connection-spec (type (eql :odbc)))
174 (when (find (car connection-spec) (database-list connection-spec type)
175 :test #'string-equal)
178 (defmethod database-list (connection-spec (type (eql :odbc)))
179 (declare (ignore connection-spec))
180 (odbc-dbi:list-all-data-sources))
182 (defmethod database-list-indexes ((database odbc-database)
185 (dolist (table (database-list-tables database :owner owner) result)
187 (append (database-list-table-indexes table database :owner owner)
190 (defmethod database-list-table-indexes (table (database odbc-database)
192 (declare (ignore owner))
193 (multiple-value-bind (rows col-names)
194 (odbc-dbi:list-table-indexes
196 :db (clsql-sys::odbc-conn database))
197 (declare (ignore col-names))
198 ;; INDEX_NAME is hard-coded in sixth position by ODBC driver
199 ;; FIXME: ??? is hard-coded in the fourth position
201 (loop-rows rows (cdr loop-rows)))
202 ((null loop-rows) (nreverse results))
203 (let* ((row (car loop-rows))
205 (unless (find col results :test #'string-equal)
206 (push col results))))))
208 ;;; Database capabilities
210 (defmethod db-backend-has-create/destroy-db? ((db-type (eql :odbc)))
214 (defmethod database-initialize-database-type ((database-type (eql :odbc)))
218 (when (clsql-sys:database-type-library-loaded :odbc)
219 (clsql-sys:initialize-database-type :database-type :odbc))