1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
|
;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: sqlite-sql.lisp
;;;; Purpose: High-level SQLite interface
;;;; Authors: Aurelio Bignoli, Kevin Rosenberg, Marcus Pearce
;;;; Created: Aug 2003
;;;;
;;;; This file, part of CLSQL, is Copyright (c) 2003 by Aurelio Bignoli and
;;;; Copyright (c) 2003-2010 by Kevin Rosenberg and Marcus Pearce.
;;;;
;;;; 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)
(defclass sqlite-database (database)
((sqlite-db :initarg :sqlite-db :accessor sqlite-db)))
(defmethod database-type ((database sqlite-database))
:sqlite)
(defmethod database-initialize-database-type ((database-type (eql :sqlite)))
t)
(defun check-sqlite-connection-spec (connection-spec)
(check-connection-spec connection-spec :sqlite (name)))
(defmethod database-name-from-spec (connection-spec
(database-type (eql :sqlite)))
(check-sqlite-connection-spec connection-spec)
(first connection-spec))
(defmethod database-connect (connection-spec (database-type (eql :sqlite)))
(check-sqlite-connection-spec connection-spec)
(handler-case
(make-instance 'sqlite-database
:name (database-name-from-spec connection-spec :sqlite)
:database-type :sqlite
:connection-spec connection-spec
:sqlite-db (sqlite:sqlite-open (first connection-spec)))
(sqlite:sqlite-error (err)
(error 'sql-connection-error
:database-type database-type
:connection-spec connection-spec
:error-id (sqlite:sqlite-error-code err)
:message (sqlite:sqlite-error-message err)))))
(defmethod database-disconnect ((database sqlite-database))
(sqlite:sqlite-close (sqlite-db database))
(setf (sqlite-db database) nil)
t)
(defmethod database-execute-command (sql-expression (database sqlite-database))
(handler-case
(multiple-value-bind (data row-n col-n)
(sqlite:sqlite-get-table (sqlite-db database) sql-expression)
(sqlite:sqlite-free-table data)
(unless (= row-n 0)
(error 'sql-warning
:format-control
"Result set not empty: ~@(~A~) row~:P, ~@(~A~) column~:P "
:format-arguments (list row-n col-n))))
(sqlite:sqlite-error (err)
(error 'sql-database-data-error
:database database
:expression sql-expression
:error-id (sqlite:sqlite-error-code err)
:message (sqlite:sqlite-error-message err))))
t)
(defstruct sqlite-result-set
(vm (sqlite:make-null-vm)
:type sqlite:sqlite-vm-pointer)
(first-row (sqlite:make-null-row)
:type sqlite:sqlite-row-pointer-type)
(col-names (sqlite:make-null-row)
:type sqlite:sqlite-row-pointer-type)
(result-types nil)
(n-col 0 :type fixnum))
(defmethod database-query (query-expression (database sqlite-database) result-types field-names)
(declare (optimize (speed 3) (safety 0) (debug 0) (space 0)))
(handler-case
(let ((vm (sqlite:sqlite-compile (sqlite-db database)
query-expression))
(rows '())
(col-names '()))
(unwind-protect
;; Read the first row to get column number and names.
(multiple-value-bind (n-col new-row sqlite-col-names)
(sqlite:sqlite-step vm)
(declare (type sqlite:sqlite-row-pointer-type new-row))
(when (> n-col 0)
(when field-names
(setf col-names (loop for i from 0 below n-col
collect (sqlite:sqlite-aref sqlite-col-names i (encoding database)))))
(let ((canonicalized-result-types
(canonicalize-result-types result-types n-col sqlite-col-names database)))
(flet ((extract-row-data (row)
(declare (type sqlite:sqlite-row-pointer-type row))
(loop for i from 0 below n-col
collect (clsql-uffi:convert-raw-field
(sqlite:sqlite-raw-aref row i)
(nth i canonicalized-result-types)
:encoding (encoding database)))))
(push (extract-row-data new-row) rows)
;; Read subsequent rows.
(do () (nil)
(multiple-value-bind (n-col new-row)
(sqlite:sqlite-step vm)
(declare (type sqlite:sqlite-row-pointer-type new-row))
(if (> n-col 0)
(push (extract-row-data new-row) rows)
(return))))))))
(sqlite:sqlite-finalize vm))
(values (nreverse rows) col-names))
(sqlite:sqlite-error (err)
(error 'sql-database-data-error
:database database
:expression query-expression
:error-id (sqlite:sqlite-error-code err)
:message (sqlite:sqlite-error-message err)))))
(defmethod database-query-result-set ((query-expression string)
(database sqlite-database)
&key result-types full-set)
(let ((vm nil))
(handler-case
(progn
(setf vm (sqlite:sqlite-compile (sqlite-db database)
query-expression))
;;; To obtain column number/datatypes we have to read the first row.
(multiple-value-bind (n-col cols col-names)
(sqlite:sqlite-step vm)
(declare (type sqlite:sqlite-row-pointer-type cols))
(let ((result-set (make-sqlite-result-set
:vm vm
:first-row cols
:n-col n-col
:col-names col-names
:result-types
(canonicalize-result-types
result-types
n-col
col-names
database))))
(if full-set
(values result-set n-col nil)
(values result-set n-col)))))
(sqlite:sqlite-error (err)
(progn
(when vm
;; The condition was thrown by sqlite-step, vm must be
;; deallocated.
(ignore-errors
(sqlite:sqlite-finalize vm)))
(error 'sql-database-data-error
:database database
:expression query-expression
:error-id (sqlite:sqlite-error-code err)
:message (sqlite:sqlite-error-message err))11)))))
(defun canonicalize-result-types (result-types n-col col-names database)
(when result-types
(let ((raw-types (if (eq :auto result-types)
(loop for j from n-col below (* 2 n-col)
collect (ensure-keyword
(sqlite:sqlite-aref col-names j (encoding database))))
result-types)))
(loop for type in raw-types
collect
(case type
((:int :integer :tinyint)
:int32)
(:long #+(or x86-64 64bit) :int64 #-(or x86-64 64bit) :int32)
(:bigint
:int64)
((:float :double)
:double)
((:numeric)
:number)
(otherwise
:string))))))
(defmethod database-dump-result-set (result-set (database sqlite-database))
(handler-case
(sqlite:sqlite-finalize (sqlite-result-set-vm result-set))
(sqlite:sqlite-error (err)
(error 'sql-database-error
:message
(format nil "Error finalizing SQLite VM: ~A"
(sqlite:sqlite-error-message err))))))
(defmethod database-store-next-row (result-set (database sqlite-database) list)
(let ((n-col (sqlite-result-set-n-col result-set))
(result-types (sqlite-result-set-result-types result-set)))
(if (= n-col 0)
;; empty result set
nil
(let ((row (sqlite-result-set-first-row result-set)))
(if (sqlite:null-row-p row)
;; First row already used. fetch another row from DB.
(handler-case
(multiple-value-bind (n new-row col-names)
(sqlite:sqlite-step (sqlite-result-set-vm result-set))
(declare (ignore n col-names)
(type sqlite:sqlite-row-pointer-type new-row))
(if (sqlite:null-row-p new-row)
(return-from database-store-next-row nil)
(setf row new-row)))
(sqlite:sqlite-error (err)
(error 'sql-database-error
:message
(format nil "Error in sqlite-step: ~A"
(sqlite:sqlite-error-message err)))))
;; Use the row previously read by database-query-result-set.
(setf (sqlite-result-set-first-row result-set)
(sqlite:make-null-row)))
(loop for i = 0 then (1+ i)
for rest on list
do (setf (car rest)
(clsql-uffi:convert-raw-field
(sqlite:sqlite-raw-aref row i)
(nth i result-types)
:encoding (encoding database))))
(sqlite:sqlite-free-row row)
t))))
;;; Object listing
(defmethod database-list-tables-and-sequences ((database sqlite-database) &key owner)
(declare (ignore owner))
;; 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 nil nil)))
(defmethod database-list-tables ((database sqlite-database) &key owner)
(remove-if #'(lambda (s)
(and (>= (length s) 11)
(string-equal (subseq s 0 11) "_CLSQL_SEQ_")))
(database-list-tables-and-sequences database :owner owner)))
(defmethod database-list-views ((database sqlite-database)
&key (owner nil))
(declare (ignore owner))
(mapcar #'car (database-query
"SELECT name FROM sqlite_master WHERE type='view' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='view' ORDER BY name"
database nil nil)))
(defmethod database-list-indexes ((database sqlite-database)
&key (owner nil))
(declare (ignore owner))
(mapcar #'car (database-query
"SELECT name FROM sqlite_master WHERE type='index' UNION ALL SELECT name FROM sqlite_temp_master WHERE type='index' ORDER BY name"
database nil nil)))
(defmethod database-list-table-indexes (table (database sqlite-database)
&key (owner nil))
(declare (ignore owner))
(let ((*print-circle* nil))
(mapcar #'car
(database-query
(format
nil
"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"
table table)
database nil nil))))
(declaim (inline sqlite-table-info))
(defun sqlite-table-info (table database)
(database-query (format nil "PRAGMA table_info('~A')" table)
database nil nil))
(defmethod database-list-attributes (table (database sqlite-database)
&key (owner nil))
(declare (ignore owner))
(mapcar #'(lambda (table-info) (second table-info))
(sqlite-table-info table database)))
(defmethod database-attribute-type (attribute table
(database sqlite-database)
&key (owner nil))
(declare (ignore owner))
(loop for field-info in (sqlite-table-info table database)
when (string= attribute (second field-info))
return
(let* ((raw-type (third field-info))
(start-length (position #\( raw-type))
(type (if start-length
(subseq raw-type 0 start-length)
raw-type))
(length (if start-length
(parse-integer (subseq raw-type (1+ start-length))
:junk-allowed t)
nil)))
(values (when type (ensure-keyword type))
length
nil
(if (string-equal (fourth field-info) "0")
1 0)))))
(defmethod database-create (connection-spec (type (eql :sqlite)))
(declare (ignore connection-spec))
;; databases are created automatically by SQLite
t)
(defmethod database-destroy (connection-spec (type (eql :sqlite)))
(destructuring-bind (name) connection-spec
(if (probe-file name)
(delete-file name)
nil)))
(defmethod database-probe (connection-spec (type (eql :sqlite)))
(destructuring-bind (name) connection-spec
;; TODO: Add a test that this file is a real sqlite database
(or (string-equal ":memory:" name)
(and (probe-file name) t))))
;;; Database capabilities
(defmethod db-type-has-boolean-where? ((db-type (eql :sqlite)))
nil)
|
