1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: sqlite-sql.lisp
6 ;;;; Purpose: High-level SQLite interface
7 ;;;; Authors: Aurelio Bignoli and Marcus Pearce
12 ;;;; This file, part of CLSQL, is Copyright (c) 2003 by Aurelio Bignoli and
15 ;;;; CLSQL users are granted the rights to distribute and use this software
16 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
17 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
18 ;;;; *************************************************************************
20 (in-package #:clsql-sqlite)
22 (defclass sqlite-database (database)
23 ((sqlite-db :initarg :sqlite-db :accessor sqlite-db)))
25 (defmethod database-type ((database sqlite-database))
28 (defmethod database-initialize-database-type ((database-type (eql :sqlite)))
31 (defun check-sqlite-connection-spec (connection-spec)
32 (check-connection-spec connection-spec :sqlite (name)))
34 (defmethod database-name-from-spec (connection-spec
35 (database-type (eql :sqlite)))
36 (check-sqlite-connection-spec connection-spec)
37 (first connection-spec))
39 (defmethod database-connect (connection-spec (database-type (eql :sqlite)))
40 (check-sqlite-connection-spec connection-spec)
42 (make-instance 'sqlite-database
43 :name (database-name-from-spec connection-spec :sqlite)
44 :database-type :sqlite
45 :connection-spec connection-spec
46 :sqlite-db (sqlite:sqlite-open (first connection-spec)))
47 (sqlite:sqlite-error (err)
48 (error 'clsql-connect-error
49 :database-type database-type
50 :connection-spec connection-spec
51 :errno (sqlite:sqlite-error-code err)
52 :error (sqlite:sqlite-error-message err)))))
54 (defmethod database-disconnect ((database sqlite-database))
55 (sqlite:sqlite-close (sqlite-db database))
56 (setf (sqlite-db database) nil)
59 (defmethod database-execute-command (sql-expression (database sqlite-database))
61 (multiple-value-bind (data row-n col-n)
62 (sqlite:sqlite-get-table (sqlite-db database) sql-expression)
63 #+clisp (declare (ignore data))
64 #-clisp (sqlite:sqlite-free-table data)
66 (error 'clsql-simple-warning
68 "Result set not empty: ~@(~A~) row~:P, ~@(~A~) column~:P "
69 :format-arguments (list row-n col-n))))
70 (sqlite:sqlite-error (err)
71 (error 'clsql-sql-error
73 :expression sql-expression
74 :errno (sqlite:sqlite-error-code err)
75 :error (sqlite:sqlite-error-message err))))
78 (defmethod database-query (query-expression (database sqlite-database) result-types field-names)
79 (declare (ignore result-types)) ; SQLite is typeless!
81 (multiple-value-bind (data row-n col-n)
82 (sqlite:sqlite-get-table (sqlite-db database) query-expression)
83 #-clisp (declare (type sqlite:sqlite-row-pointer-type data))
86 (loop for i from col-n below (* (1+ row-n) col-n) by col-n
87 collect (loop for j from 0 below col-n
90 #-clisp sqlite:sqlite-aref
94 (loop for j from 0 below col-n
96 #-clisp sqlite:sqlite-aref
98 #-clisp (sqlite:sqlite-free-table data)
100 (sqlite:sqlite-error (err)
101 (error 'clsql-sql-error
103 :expression query-expression
104 :errno (sqlite:sqlite-error-code err)
105 :error (sqlite:sqlite-error-message err)))))
108 (defstruct sqlite-result-set
109 (vm (sqlite:make-null-vm)
110 :type sqlite:sqlite-vm-pointer)
111 (first-row (sqlite:make-null-row)
112 :type sqlite:sqlite-row-pointer-type)
113 (n-col 0 :type fixnum))
115 (defstruct sqlite-result-set
118 (n-col 0 :type fixnum))
120 (defmethod database-query-result-set
121 ((query-expression string) (database sqlite-database) &key full-set result-types)
122 (declare (ignore full-set result-types))
124 (let* ((vm (sqlite:sqlite-compile (sqlite-db database)
126 (result-set (make-sqlite-result-set :vm vm)))
127 #-clisp (declare (type sqlite:sqlite-vm-pointer vm))
129 ;;; To obtain column number we have to read the first row.
130 (multiple-value-bind (n-col cols col-names)
131 (sqlite:sqlite-step vm)
132 (declare (ignore col-names)
133 #-clisp (type sqlite:sqlite-row-pointer-type cols)
135 (setf (sqlite-result-set-first-row result-set) cols
136 (sqlite-result-set-n-col result-set) n-col)
137 (values result-set n-col nil)))
138 (sqlite:sqlite-error (err)
139 (error 'clsql-sql-error
141 :expression query-expression
142 :errno (sqlite:sqlite-error-code err)
143 :error (sqlite:sqlite-error-message err)))))
145 (defmethod database-dump-result-set (result-set (database sqlite-database))
147 (sqlite:sqlite-finalize (sqlite-result-set-vm result-set))
148 (sqlite:sqlite-error (err)
149 (error 'clsql-simple-error
150 :format-control "Error finalizing SQLite VM: ~A"
151 :format-arguments (list (sqlite:sqlite-error-message err))))))
153 (defmethod database-store-next-row (result-set (database sqlite-database) list)
154 (let ((n-col (sqlite-result-set-n-col result-set)))
158 (let ((row (sqlite-result-set-first-row result-set)))
159 (if (sqlite:null-row-p row)
160 ;; First row already used. fetch another row from DB.
162 (multiple-value-bind (n new-row col-names)
163 (sqlite:sqlite-step (sqlite-result-set-vm result-set))
164 (declare (ignore n col-names)
165 #-clisp (type sqlite:sqlite-row-pointer-type new-row)
167 (if (sqlite:null-row-p new-row)
168 (return-from database-store-next-row nil)
170 (sqlite:sqlite-error (err)
171 (error 'clsql-simple-error
172 :format-control "Error in sqlite-step: ~A"
174 (list (sqlite:sqlite-error-message err)))))
176 ;; Use the row previously read by database-query-result-set.
177 (setf (sqlite-result-set-first-row result-set)
178 (sqlite:make-null-row)))
179 (loop for i = 0 then (1+ i)
183 #-clisp sqlite:sqlite-aref
185 #-clisp (sqlite:sqlite-free-row row)
190 (defmethod database-list-tables ((database sqlite-database) &key owner)
191 (declare (ignore owner))
192 ;; Query is copied from .table command of sqlite comamnd line utility.
193 (remove-if #'(lambda (s)
194 (and (>= (length s) 11)
195 (string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
196 (mapcar #'car (database-query
197 "SELECT name FROM sqlite_master WHERE type='table' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='table' ORDER BY name"
200 (defmethod database-list-views ((database sqlite-database)
202 (declare (ignore owner))
203 (mapcar #'car (database-query
204 "SELECT name FROM sqlite_master WHERE type='view' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='view' ORDER BY name"
207 (defmethod database-list-indexes ((database sqlite-database)
209 (declare (ignore owner))
210 (mapcar #'car (database-query
211 "SELECT name FROM sqlite_master WHERE type='index' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='index' ORDER BY name"
214 (defmethod database-list-table-indexes (table (database sqlite-database)
216 (declare (ignore owner))
217 (let ((*print-circle* nil))
222 "SELECT name FROM sqlite_master WHERE type='index' AND tbl_name='~A' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='index' AND tbl_name='~A' ORDER BY name"
226 (declaim (inline sqlite-table-info))
227 (defun sqlite-table-info (table database)
228 (database-query (format nil "PRAGMA table_info('~A')" table)
231 (defmethod database-list-attributes (table (database sqlite-database)
233 (declare (ignore owner))
234 (mapcar #'(lambda (table-info) (second table-info))
235 (sqlite-table-info table database)))
237 (defmethod database-attribute-type (attribute table
238 (database sqlite-database)
240 (declare (ignore owner))
241 (loop for field-info in (sqlite-table-info table database)
242 when (string= attribute (second field-info))
244 (let* ((raw-type (third field-info))
245 (start-length (position #\( raw-type))
246 (type (if start-length
247 (subseq raw-type 0 start-length)
249 (length (if start-length
250 (parse-integer (subseq raw-type (1+ start-length))
253 (values (when type (ensure-keyword type))
256 (if (string-equal (fourth field-info) "0")
259 (defun %sequence-name-to-table-name (sequence-name)
260 (concatenate 'string "_CLSQL_SEQ_" (sql-escape sequence-name)))
262 (defun %table-name-to-sequence-name (table-name)
263 (and (>= (length table-name) 11)
264 (string= (subseq table-name 0 11) "_CLSQL_SEQ_")
265 (subseq table-name 11)))
268 (defmethod database-create-sequence (sequence-name
269 (database sqlite-database))
270 (let ((table-name (%sequence-name-to-table-name sequence-name)))
271 (database-execute-command
272 (concatenate 'string "CREATE TABLE " table-name
273 " (last_value integer PRIMARY KEY, increment_by integer, min_value integer, is_called char(1))")
275 (database-execute-command
276 (concatenate 'string "INSERT INTO " table-name
277 " VALUES (1,1,1,'f')")
280 (defmethod database-drop-sequence (sequence-name
281 (database sqlite-database))
282 (database-execute-command
283 (concatenate 'string "DROP TABLE " (%sequence-name-to-table-name sequence-name))
286 (defmethod database-list-sequences ((database sqlite-database)
288 (declare (ignore owner))
289 (mapcan #'(lambda (s)
290 (let ((sn (%table-name-to-sequence-name (car s))))
293 "SELECT name FROM sqlite_master WHERE type='table' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='table' ORDER BY name"
296 (defmethod database-sequence-next (sequence-name (database sqlite-database))
298 (let* ((table-name (%sequence-name-to-table-name sequence-name))
301 (concatenate 'string "SELECT last_value,is_called FROM "
303 database :auto nil))))
305 ((char-equal (schar (second tuple) 0) #\f)
306 (database-execute-command
307 (format nil "UPDATE ~A SET is_called='t'" table-name)
309 (parse-integer (car tuple)))
311 (let ((new-pos (1+ (parse-integer (car tuple)))))
312 (database-execute-command
313 (format nil "UPDATE ~A SET last_value=~D" table-name new-pos)
317 (defmethod database-sequence-last (sequence-name (database sqlite-database))
320 (caar (database-query
321 (concatenate 'string "SELECT last_value FROM "
322 (%sequence-name-to-table-name sequence-name))
323 database :auto nil)))))
325 (defmethod database-set-sequence-position (sequence-name
327 (database sqlite-database))
328 (database-execute-command
329 (format nil "UPDATE ~A SET last_value=~A,is_called='t'"
330 (%sequence-name-to-table-name sequence-name)
335 (defmethod database-create (connection-spec (type (eql :sqlite)))
336 (declare (ignore connection-spec))
337 ;; databases are created automatically by SQLite
340 (defmethod database-destroy (connection-spec (type (eql :sqlite)))
341 (destructuring-bind (name) connection-spec
342 (if (probe-file name)
346 (defmethod database-probe (connection-spec (type (eql :sqlite)))
347 (destructuring-bind (name) connection-spec
348 ;; TODO: Add a test that this file is a real sqlite database
349 (or (string-equal ":memory:" name)
350 (and (probe-file name) t))))
352 ;;; Database capabilities
354 (defmethod db-type-has-boolean-where? ((db-type (eql :sqlite)))