forked from mattn/go-sqlite3
-
Notifications
You must be signed in to change notification settings - Fork 0
/
sqlite3_opt_vtable_test.go
486 lines (412 loc) · 10.9 KB
/
sqlite3_opt_vtable_test.go
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
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
// Copyright (C) 2019 Yasuhiro Matsumoto <[email protected]>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// +build sqlite_vtable vtable
package sqlite3
import (
"database/sql"
"errors"
"fmt"
"os"
"reflect"
"strings"
"testing"
)
type testModule struct {
t *testing.T
intarray []int
}
type testVTab struct {
intarray []int
}
type testVTabCursor struct {
vTab *testVTab
index int
}
func (m testModule) Create(c *SQLiteConn, args []string) (VTab, error) {
if len(args) != 6 {
m.t.Fatal("six arguments expected")
}
if args[0] != "test" {
m.t.Fatal("module name")
}
if args[1] != "main" {
m.t.Fatal("db name")
}
if args[2] != "vtab" {
m.t.Fatal("table name")
}
if args[3] != "'1'" {
m.t.Fatal("first arg")
}
if args[4] != "2" {
m.t.Fatal("second arg")
}
if args[5] != "three" {
m.t.Fatal("third argsecond arg")
}
err := c.DeclareVTab("CREATE TABLE x(test TEXT)")
if err != nil {
return nil, err
}
return &testVTab{m.intarray}, nil
}
func (m testModule) Connect(c *SQLiteConn, args []string) (VTab, error) {
return m.Create(c, args)
}
func (m testModule) DestroyModule() {}
func (v *testVTab) BestIndex(cst []InfoConstraint, ob []InfoOrderBy) (*IndexResult, error) {
used := make([]bool, 0, len(cst))
for range cst {
used = append(used, false)
}
return &IndexResult{
Used: used,
IdxNum: 0,
IdxStr: "test-index",
AlreadyOrdered: true,
EstimatedCost: 100,
EstimatedRows: 200,
}, nil
}
func (v *testVTab) Disconnect() error {
return nil
}
func (v *testVTab) Destroy() error {
return nil
}
func (v *testVTab) Open() (VTabCursor, error) {
return &testVTabCursor{v, 0}, nil
}
func (vc *testVTabCursor) Close() error {
return nil
}
func (vc *testVTabCursor) Filter(idxNum int, idxStr string, vals []interface{}) error {
vc.index = 0
return nil
}
func (vc *testVTabCursor) Next() error {
vc.index++
return nil
}
func (vc *testVTabCursor) EOF() bool {
return vc.index >= len(vc.vTab.intarray)
}
func (vc *testVTabCursor) Column(c *SQLiteContext, col int) error {
if col != 0 {
return fmt.Errorf("column index out of bounds: %d", col)
}
c.ResultInt(vc.vTab.intarray[vc.index])
return nil
}
func (vc *testVTabCursor) Rowid() (int64, error) {
return int64(vc.index), nil
}
func TestCreateModule(t *testing.T) {
tempFilename := TempFilename(t)
defer os.Remove(tempFilename)
intarray := []int{1, 2, 3}
sql.Register("sqlite3_TestCreateModule", &SQLiteDriver{
ConnectHook: func(conn *SQLiteConn) error {
return conn.CreateModule("test", testModule{t, intarray})
},
})
db, err := sql.Open("sqlite3_TestCreateModule", tempFilename)
if err != nil {
t.Fatalf("could not open db: %v", err)
}
_, err = db.Exec("CREATE VIRTUAL TABLE vtab USING test('1', 2, three)")
if err != nil {
t.Fatalf("could not create vtable: %v", err)
}
var i, value int
rows, err := db.Query("SELECT rowid, * FROM vtab WHERE test = '3'")
if err != nil {
t.Fatalf("couldn't select from virtual table: %v", err)
}
for rows.Next() {
rows.Scan(&i, &value)
if intarray[i] != value {
t.Fatalf("want %v but %v", intarray[i], value)
}
}
_, err = db.Exec("DROP TABLE vtab")
if err != nil {
t.Fatalf("couldn't drop virtual table: %v", err)
}
}
func TestVUpdate(t *testing.T) {
tempFilename := TempFilename(t)
defer os.Remove(tempFilename)
// create module
updateMod := &vtabUpdateModule{t, make(map[string]*vtabUpdateTable)}
// register module
sql.Register("sqlite3_TestVUpdate", &SQLiteDriver{
ConnectHook: func(conn *SQLiteConn) error {
return conn.CreateModule("updatetest", updateMod)
},
})
// connect
db, err := sql.Open("sqlite3_TestVUpdate", tempFilename)
if err != nil {
t.Fatalf("could not open db: %v", err)
}
// create test table
_, err = db.Exec(`CREATE VIRTUAL TABLE vt USING updatetest(f1 integer, f2 text, f3 text)`)
if err != nil {
t.Fatalf("could not create updatetest vtable vt, got: %v", err)
}
// check that table is defined properly
if len(updateMod.tables) != 1 {
t.Fatalf("expected exactly 1 table to exist, got: %d", len(updateMod.tables))
}
if _, ok := updateMod.tables["vt"]; !ok {
t.Fatalf("expected table `vt` to exist in tables")
}
// check nothing in updatetest
rows, err := db.Query(`select * from vt`)
if err != nil {
t.Fatalf("could not query vt, got: %v", err)
}
i, err := getRowCount(rows)
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
if i != 0 {
t.Fatalf("expected no rows in vt, got: %d", i)
}
_, err = db.Exec(`delete from vt where f1 = 'yes'`)
if err != nil {
t.Fatalf("expected error on delete, got nil")
}
// test bad column name
_, err = db.Exec(`insert into vt (f4) values('a')`)
if err == nil {
t.Fatalf("expected error on insert, got nil")
}
// insert to vt
res, err := db.Exec(`insert into vt (f1, f2, f3) values (115, 'b', 'c'), (116, 'd', 'e')`)
if err != nil {
t.Fatalf("expected no error on insert, got: %v", err)
}
n, err := res.RowsAffected()
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
if n != 2 {
t.Fatalf("expected 1 row affected, got: %d", n)
}
// check vt table
vt := updateMod.tables["vt"]
if len(vt.data) != 2 {
t.Fatalf("expected table vt to have exactly 2 rows, got: %d", len(vt.data))
}
if !reflect.DeepEqual(vt.data[0], []interface{}{int64(115), "b", "c"}) {
t.Fatalf("expected table vt entry 0 to be [115 b c], instead: %v", vt.data[0])
}
if !reflect.DeepEqual(vt.data[1], []interface{}{int64(116), "d", "e"}) {
t.Fatalf("expected table vt entry 1 to be [116 d e], instead: %v", vt.data[1])
}
// query vt
var f1 int
var f2, f3 string
err = db.QueryRow(`select * from vt where f1 = 115`).Scan(&f1, &f2, &f3)
if err != nil {
t.Fatalf("expected no error on vt query, got: %v", err)
}
// check column values
if f1 != 115 || f2 != "b" || f3 != "c" {
t.Errorf("expected f1==115, f2==b, f3==c, got: %d, %q, %q", f1, f2, f3)
}
// update vt
res, err = db.Exec(`update vt set f1=117, f2='f' where f3='e'`)
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
n, err = res.RowsAffected()
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
if n != 1 {
t.Fatalf("expected exactly one row updated, got: %d", n)
}
// check vt table
if len(vt.data) != 2 {
t.Fatalf("expected table vt to have exactly 2 rows, got: %d", len(vt.data))
}
if !reflect.DeepEqual(vt.data[0], []interface{}{int64(115), "b", "c"}) {
t.Fatalf("expected table vt entry 0 to be [115 b c], instead: %v", vt.data[0])
}
if !reflect.DeepEqual(vt.data[1], []interface{}{int64(117), "f", "e"}) {
t.Fatalf("expected table vt entry 1 to be [117 f e], instead: %v", vt.data[1])
}
// delete from vt
res, err = db.Exec(`delete from vt where f1 = 117`)
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
n, err = res.RowsAffected()
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
if n != 1 {
t.Fatalf("expected exactly one row deleted, got: %d", n)
}
// check vt table
if len(vt.data) != 1 {
t.Fatalf("expected table vt to have exactly 1 row, got: %d", len(vt.data))
}
if !reflect.DeepEqual(vt.data[0], []interface{}{int64(115), "b", "c"}) {
t.Fatalf("expected table vt entry 0 to be [115 b c], instead: %v", vt.data[0])
}
// check updatetest has 1 result
rows, err = db.Query(`select * from vt`)
if err != nil {
t.Fatalf("could not query vt, got: %v", err)
}
i, err = getRowCount(rows)
if err != nil {
t.Fatalf("expected no error, got: %v", err)
}
if i != 1 {
t.Fatalf("expected 1 row in vt, got: %d", i)
}
}
func getRowCount(rows *sql.Rows) (int, error) {
var i int
for rows.Next() {
i++
}
return i, nil
}
type vtabUpdateModule struct {
t *testing.T
tables map[string]*vtabUpdateTable
}
func (m *vtabUpdateModule) Create(c *SQLiteConn, args []string) (VTab, error) {
if len(args) < 2 {
return nil, errors.New("must declare at least one column")
}
// get database name, table name, and column declarations ...
dbname, tname, decls := args[1], args[2], args[3:]
// extract column names + types from parameters declarations
cols, typs := make([]string, len(decls)), make([]string, len(decls))
for i := 0; i < len(decls); i++ {
n, typ := decls[i], ""
if j := strings.IndexAny(n, " \t\n"); j != -1 {
typ, n = strings.TrimSpace(n[j+1:]), n[:j]
}
cols[i], typs[i] = n, typ
}
// declare table
err := c.DeclareVTab(fmt.Sprintf(`CREATE TABLE "%s"."%s" (%s)`, dbname, tname, strings.Join(decls, ",")))
if err != nil {
return nil, err
}
// create table
vtab := &vtabUpdateTable{m.t, dbname, tname, cols, typs, make([][]interface{}, 0)}
m.tables[tname] = vtab
return vtab, nil
}
func (m *vtabUpdateModule) Connect(c *SQLiteConn, args []string) (VTab, error) {
return m.Create(c, args)
}
func (m *vtabUpdateModule) DestroyModule() {}
type vtabUpdateTable struct {
t *testing.T
db string
name string
cols []string
typs []string
data [][]interface{}
}
func (t *vtabUpdateTable) Open() (VTabCursor, error) {
return &vtabUpdateCursor{t, 0}, nil
}
func (t *vtabUpdateTable) BestIndex(cst []InfoConstraint, ob []InfoOrderBy) (*IndexResult, error) {
return &IndexResult{Used: make([]bool, len(cst))}, nil
}
func (t *vtabUpdateTable) Disconnect() error {
return nil
}
func (t *vtabUpdateTable) Destroy() error {
return nil
}
func (t *vtabUpdateTable) Insert(id interface{}, vals []interface{}) (int64, error) {
var i int64
if id == nil {
i, t.data = int64(len(t.data)), append(t.data, vals)
return i, nil
}
var ok bool
i, ok = id.(int64)
if !ok {
return 0, fmt.Errorf("id is invalid type: %T", id)
}
t.data[i] = vals
return i, nil
}
func (t *vtabUpdateTable) Update(id interface{}, vals []interface{}) error {
i, ok := id.(int64)
if !ok {
return fmt.Errorf("id is invalid type: %T", id)
}
if int(i) >= len(t.data) || i < 0 {
return fmt.Errorf("invalid row id %d", i)
}
t.data[int(i)] = vals
return nil
}
func (t *vtabUpdateTable) Delete(id interface{}) error {
i, ok := id.(int64)
if !ok {
return fmt.Errorf("id is invalid type: %T", id)
}
if int(i) >= len(t.data) || i < 0 {
return fmt.Errorf("invalid row id %d", i)
}
t.data = append(t.data[:i], t.data[i+1:]...)
return nil
}
type vtabUpdateCursor struct {
t *vtabUpdateTable
i int
}
func (c *vtabUpdateCursor) Column(ctxt *SQLiteContext, col int) error {
switch x := c.t.data[c.i][col].(type) {
case []byte:
ctxt.ResultBlob(x)
case bool:
ctxt.ResultBool(x)
case float64:
ctxt.ResultDouble(x)
case int:
ctxt.ResultInt(x)
case int64:
ctxt.ResultInt64(x)
case nil:
ctxt.ResultNull()
case string:
ctxt.ResultText(x)
default:
ctxt.ResultText(fmt.Sprintf("%v", x))
}
return nil
}
func (c *vtabUpdateCursor) Filter(ixNum int, ixName string, vals []interface{}) error {
return nil
}
func (c *vtabUpdateCursor) Next() error {
c.i++
return nil
}
func (c *vtabUpdateCursor) EOF() bool {
return c.i >= len(c.t.data)
}
func (c *vtabUpdateCursor) Rowid() (int64, error) {
return int64(c.i), nil
}
func (c *vtabUpdateCursor) Close() error {
return nil
}