/
applier_gtid_executed.go
377 lines (328 loc) · 9.41 KB
/
applier_gtid_executed.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
package mysql
import (
"context"
gosql "database/sql"
"fmt"
"strconv"
"strings"
"github.com/actiontech/dtle/driver/mysql/base"
"github.com/actiontech/dtle/driver/mysql/sql"
"github.com/actiontech/dtle/g"
mysql "github.com/go-mysql-org/go-mysql/mysql"
uuid "github.com/satori/go.uuid"
)
var createTableGtidExecutedV4Query = fmt.Sprintf(`
CREATE TABLE IF NOT EXISTS %v.%v (
job_name varchar(%v) NOT NULL,
source_uuid binary(16) NOT NULL COMMENT 'uuid of the source where the transaction was originally executed.',
gtid bigint NOT NULL COMMENT 'single TX. 0 means the row is for gtid_set',
gtid_set longtext NULL COMMENT 'Meanful when gtid=0. Summary of all GTIDs',
primary key (job_name, source_uuid, gtid))`,
g.DtleSchemaName, g.GtidExecutedTableV4, g.JobNameLenLimit)
func (a *GtidExecutedCreater) migrateGtidExecutedV2toV3() error {
a.logger.Info(`migrateGtidExecutedV2toV3 starting`)
var err error
var query string
logErr := func(query string, err error) {
a.logger.Error(`migrateGtidExecutedV2toV3 failed. manual intervention might be required.`,
"query", query, "err", err)
}
query = fmt.Sprintf("alter table %v.%v rename to %v.%v",
g.DtleSchemaName, g.GtidExecutedTableV2, g.DtleSchemaName, g.GtidExecutedTempTable2To3)
_, err = a.db.Exec(query)
if err != nil {
logErr(query, err)
return err
}
query = fmt.Sprintf("alter table %v.%v modify column interval_gtid longtext",
g.DtleSchemaName, g.GtidExecutedTempTable2To3)
_, err = a.db.Exec(query)
if err != nil {
logErr(query, err)
return err
}
query = fmt.Sprintf("alter table %v.%v rename to %v.%v",
g.DtleSchemaName, g.GtidExecutedTempTable2To3, g.DtleSchemaName, g.GtidExecutedTableV3)
_, err = a.db.Exec(query)
if err != nil {
logErr(query, err)
return err
}
a.logger.Info(`migrateGtidExecutedV2toV3 done`)
return nil
}
func (a *GtidExecutedCreater) migrateGtidExecutedV3toV4() (err error) {
a.logger.Info(`migrateGtidExecutedV3toV4 starting`)
var query string
logErr := func(query string, err error) {
a.logger.Error(`migrateGtidExecutedV3toV4 failed. manual intervention might be required.`,
"query", query, "err", err)
}
_, err = a.db.Exec(createTableGtidExecutedV4Query)
if err != nil {
logErr(query, err)
return err
}
query = fmt.Sprintf("select hex(job_uuid), source_uuid, interval_gtid from %v.%v",
g.DtleSchemaName, g.GtidExecutedTableV3)
rows, err := a.db.Query(query)
if err != nil {
logErr(query, err)
return err
}
tx, err := a.db.Begin()
if err != nil {
logErr(query, err)
return err
}
defer func() {
if err != nil {
_ = tx.Rollback()
}
}()
stmt, err := tx.Prepare(fmt.Sprintf("insert into %v.%v values (?, ?, ?, null)",
g.DtleSchemaName, g.GtidExecutedTableV4))
if err != nil {
logErr(query, err)
return err
}
for rows.Next() {
var job uuid.UUID
var sid uuid.UUID
var interval string
err = rows.Scan(&job, &sid, &interval)
if err != nil {
logErr(query, err)
return err
}
if strings.ContainsAny(interval, ",-:") {
_, err = a.db.Exec(fmt.Sprintf("insert into %v.%v values (?, ?, 0, ?)",
g.DtleSchemaName, g.GtidExecutedTableV4),
job.String(), sid.Bytes(), interval)
if err != nil {
logErr(query, err)
return err
}
} else {
gno, err := strconv.ParseInt(interval, 10, 64)
if err != nil {
logErr(query, err)
return err
}
_, err = stmt.Exec(job, sid.Bytes(), gno)
if err != nil {
logErr(query, err)
return err
}
}
}
err = tx.Commit()
if err != nil {
logErr(query, err)
return err
}
query = fmt.Sprintf("drop table %v.%v", g.DtleSchemaName, g.GtidExecutedTableV3)
_, err = a.db.Exec(query)
if err != nil {
logErr(query, err)
return err
}
a.logger.Info(`migrateGtidExecutedV3toV4 done`)
return nil
}
func (a *GtidExecutedCreater) migrateGtidExecutedV3atoV4() (err error) {
a.logger.Info(`migrateGtidExecutedV3atoV4 starting`)
var query string
logErr := func(query string, err error) {
a.logger.Error(`migrateGtidExecutedV3atoV4 failed. manual intervention might be required.`,
"query", query, "err", err)
}
_, err = a.db.Exec(createTableGtidExecutedV4Query)
if err != nil {
logErr(query, err)
return err
}
_, err = a.db.Exec(fmt.Sprintf("insert into %v.%v (select hex(job_uuid), source_uuid, gtid, gtid_set from %v.%v)",
g.DtleSchemaName, g.GtidExecutedTableV4, g.DtleSchemaName, g.GtidExecutedTableV3a))
query = fmt.Sprintf("drop table %v.%v", g.DtleSchemaName, g.GtidExecutedTableV3a)
_, err = a.db.Exec(query)
if err != nil {
logErr(query, err)
return err
}
a.logger.Info(`migrateGtidExecutedV3atoV4 done`)
return nil
}
type GtidExecutedCreater struct {
db *gosql.DB
logger g.LoggerType
}
func (a *GtidExecutedCreater) createTableGtidExecutedV4() error {
query := fmt.Sprintf(`
CREATE DATABASE IF NOT EXISTS %v;
`, g.DtleSchemaName)
if _, err := a.db.Exec(query); err != nil {
return err
}
a.logger.Debug("after create dtle schema")
if result, err := sql.QueryResultData(a.db, fmt.Sprintf("SHOW TABLES FROM %v LIKE '%v%%'",
g.DtleSchemaName, g.GtidExecutedTempTablePrefix)); nil == err && len(result) > 0 {
return fmt.Errorf("GtidExecutedTempTable exists. require manual intervention")
}
result, err := sql.QueryResultData(a.db, fmt.Sprintf("SHOW TABLES FROM %v LIKE '%v%%'",
g.DtleSchemaName, g.GtidExecutedTablePrefix))
if err != nil {
return err
}
a.logger.Debug("after show gtid_executed table", "result", result)
if len(result) > 1 {
return fmt.Errorf("multiple GtidExecutedTable exists, while at most one is allowed." +
" require manual intervention")
} else if len(result) == 1 {
switch result[0][0].String {
case g.GtidExecutedTableV2:
err = a.migrateGtidExecutedV2toV3()
if err != nil {
return err
}
err = a.migrateGtidExecutedV3toV4()
if err != nil {
return err
}
return nil
case g.GtidExecutedTableV3:
err = a.migrateGtidExecutedV3toV4()
if err != nil {
return err
}
return nil
case g.GtidExecutedTableV3a:
err = a.migrateGtidExecutedV3atoV4()
if err != nil {
return err
}
return nil
case g.GtidExecutedTableV4:
return nil
default:
return fmt.Errorf("newer GtidExecutedTable exists, which is unrecognized by this verion. require manual intervention")
}
} else {
if _, err := a.db.Exec(createTableGtidExecutedV4Query); err != nil {
return err
}
a.logger.Debug("after create gtid_executed table")
return nil
}
}
func (a *ApplierIncr) cleanGtidExecuted(sid uuid.UUID, txSid string) error {
if !a.mtsManager.WaitForAllCommitted(a.logger.With("txSid", txSid)) {
return nil // shutdown
}
intervalStr := func() string {
a.gtidSetLock.RLock()
defer a.gtidSetLock.RUnlock()
intervals := base.GetIntervals(a.gtidSet, txSid)
return base.StringInterval(intervals)
}()
// The TX is unnecessary if we first insert and then delete.
// However, consider `binlog_group_commit_sync_delay > 0`,
// `begin; delete; insert; commit;` (1 TX) is faster than `insert; delete;` (2 TX)
dbApplier := a.dbs[0]
tx, err := dbApplier.Db.BeginTx(a.ctx, &gosql.TxOptions{})
if err != nil {
return err
}
defer func() {
if err != nil {
tx.Rollback()
} else {
err = tx.Commit()
}
}()
_, err = dbApplier.PsDeleteExecutedGtid.Exec(a.subject, g.UUIDStrToMySQLHex(txSid))
if err != nil {
return err
}
a.logger.Debug("compactation gtid. new interval", "intervalStr", intervalStr)
_, err = dbApplier.Db.ExecContext(a.ctx,
fmt.Sprintf("insert into %v.%v values (?,?,0,?)", g.DtleSchemaName, g.GtidExecutedTableV4),
a.subject, sid.Bytes(), intervalStr)
if err != nil {
return err
}
return nil
}
// Interval is [start, stop), but the GTID string's format is [n] or [n1-n2], closed interval
func parseInterval(str string) (i mysql.Interval, err error) {
p := strings.Split(str, "-")
switch len(p) {
case 1:
i.Start, err = strconv.ParseInt(p[0], 10, 64)
i.Stop = i.Start + 1
case 2:
i.Start, err = strconv.ParseInt(p[0], 10, 64)
i.Stop, err = strconv.ParseInt(p[1], 10, 64)
i.Stop = i.Stop + 1
default:
err = fmt.Errorf("invalid interval format, must n[-n]")
}
if err != nil {
return
}
if i.Stop <= i.Start {
err = fmt.Errorf("invalid interval format, must n[-n] and the end must >= start")
}
return
}
// return: normalized GtidSet
func SelectAllGtidExecuted(db sql.QueryAble, jid string, gtidSet *mysql.MysqlGTIDSet) (
itemMap base.GtidItemMap, err error) {
query := fmt.Sprintf(`SELECT source_uuid,gtid,gtid_set FROM %v.%v where job_name=?`,
g.DtleSchemaName, g.GtidExecutedTableV4)
rows, err := db.QueryContext(context.TODO(), query, jid)
if err != nil {
return nil, err
}
defer rows.Close()
itemMap = make(base.GtidItemMap)
for rows.Next() {
var sidUUID uuid.UUID
var gno int64
var gnoSet gosql.NullString
err = rows.Scan(&sidUUID, &gno, &gnoSet)
if err != nil {
return nil, err
}
item, ok := itemMap[sidUUID]
if !ok {
item = &base.GtidItem{
NRow: 0,
}
itemMap[sidUUID] = item
}
item.NRow += 1
if gno == 0 {
gsetTrimmed := strings.TrimSpace(gnoSet.String)
if gsetTrimmed == "" {
gtidSet.AddSet(mysql.NewUUIDSet(sidUUID))
} else {
sep := strings.Split(gsetTrimmed, ":")
// Handle interval
for i := 0; i < len(sep); i++ {
if in, err := parseInterval(sep[i]); err != nil {
return nil, err
} else {
gtidSet.AddSet(mysql.NewUUIDSet(sidUUID, in))
}
}
}
} else {
gtidSet.AddSet(mysql.NewUUIDSet(sidUUID, mysql.Interval{
Start: gno,
Stop: gno + 1,
}))
}
}
return itemMap, err
}