forked from pingcap/tidb
-
Notifications
You must be signed in to change notification settings - Fork 1
/
ddl.go
597 lines (531 loc) · 23.2 KB
/
ddl.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
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
// Copyright 2013 The ql Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSES/QL-LICENSE file.
// Copyright 2015 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package ddl
import (
"fmt"
"sync"
"time"
"github.com/coreos/etcd/clientv3"
"github.com/juju/errors"
"github.com/ngaut/pools"
"github.com/pingcap/tidb/ast"
"github.com/pingcap/tidb/ddl/util"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/meta"
"github.com/pingcap/tidb/metrics"
"github.com/pingcap/tidb/model"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/owner"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/sessionctx/binloginfo"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/terror"
log "github.com/sirupsen/logrus"
"github.com/twinj/uuid"
"golang.org/x/net/context"
)
const (
// currentVersion is for all new DDL jobs.
currentVersion = 1
// DDLOwnerKey is the ddl owner path that is saved to etcd, and it's exported for testing.
DDLOwnerKey = "/tidb/ddl/fg/owner"
ddlPrompt = "ddl"
shardRowIDBitsMax = 15
)
var (
// TableColumnCountLimit is limit of the number of columns in a table.
// It's exported for testing.
TableColumnCountLimit = 512
// EnableSplitTableRegion is a flag to decide whether to split a new region for
// a newly created table. It takes effect only if the Storage supports split
// region.
EnableSplitTableRegion = true
)
var (
// errWorkerClosed means we have already closed the DDL worker.
errInvalidWorker = terror.ClassDDL.New(codeInvalidWorker, "invalid worker")
// errNotOwner means we are not owner and can't handle DDL jobs.
errNotOwner = terror.ClassDDL.New(codeNotOwner, "not Owner")
errInvalidDDLJob = terror.ClassDDL.New(codeInvalidDDLJob, "invalid DDL job")
errCancelledDDLJob = terror.ClassDDL.New(codeCancelledDDLJob, "cancelled DDL job")
errInvalidJobFlag = terror.ClassDDL.New(codeInvalidJobFlag, "invalid job flag")
errRunMultiSchemaChanges = terror.ClassDDL.New(codeRunMultiSchemaChanges, "can't run multi schema change")
errWaitReorgTimeout = terror.ClassDDL.New(codeWaitReorgTimeout, "wait for reorganization timeout")
errInvalidStoreVer = terror.ClassDDL.New(codeInvalidStoreVer, "invalid storage current version")
// We don't support dropping column with index covered now.
errCantDropColWithIndex = terror.ClassDDL.New(codeCantDropColWithIndex, "can't drop column with index")
errUnsupportedAddColumn = terror.ClassDDL.New(codeUnsupportedAddColumn, "unsupported add column")
errUnsupportedModifyColumn = terror.ClassDDL.New(codeUnsupportedModifyColumn, "unsupported modify column %s")
errUnsupportedPKHandle = terror.ClassDDL.New(codeUnsupportedDropPKHandle,
"unsupported drop integer primary key")
errUnsupportedCharset = terror.ClassDDL.New(codeUnsupportedCharset, "unsupported charset %s collate %s")
errUnsupportedShardRowIDBits = terror.ClassDDL.New(codeUnsupportedShardRowIDBits, "unsupported shard_row_id_bits for table with auto_increment column.")
errBlobKeyWithoutLength = terror.ClassDDL.New(codeBlobKeyWithoutLength, "index for BLOB/TEXT column must specify a key length")
errIncorrectPrefixKey = terror.ClassDDL.New(codeIncorrectPrefixKey, "Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys")
errTooLongKey = terror.ClassDDL.New(codeTooLongKey,
fmt.Sprintf("Specified key was too long; max key length is %d bytes", maxPrefixLength))
errKeyColumnDoesNotExits = terror.ClassDDL.New(codeKeyColumnDoesNotExits, "this key column doesn't exist in table")
errUnknownTypeLength = terror.ClassDDL.New(codeUnknownTypeLength, "Unknown length for type tp %d")
errUnknownFractionLength = terror.ClassDDL.New(codeUnknownFractionLength, "Unknown Length for type tp %d and fraction %d")
errInvalidJobVersion = terror.ClassDDL.New(codeInvalidJobVersion, "DDL job with version %d greater than current %d")
errFileNotFound = terror.ClassDDL.New(codeFileNotFound, "Can't find file: './%s/%s.frm'")
errErrorOnRename = terror.ClassDDL.New(codeErrorOnRename, "Error on rename of './%s/%s' to './%s/%s'")
errBadField = terror.ClassDDL.New(codeBadField, "Unknown column '%s' in '%s'")
errInvalidUseOfNull = terror.ClassDDL.New(codeInvalidUseOfNull, "Invalid use of NULL value")
errTooManyFields = terror.ClassDDL.New(codeTooManyFields, "Too many columns")
errInvalidSplitRegionRanges = terror.ClassDDL.New(codeInvalidRanges, "Failed to split region ranges")
errReorgPanic = terror.ClassDDL.New(codeReorgWorkerPanic, "reorg worker panic.")
// errWrongKeyColumn is for table column cannot be indexed.
errWrongKeyColumn = terror.ClassDDL.New(codeWrongKeyColumn, mysql.MySQLErrName[mysql.ErrWrongKeyColumn])
// errUnsupportedOnGeneratedColumn is for unsupported actions on generated columns.
errUnsupportedOnGeneratedColumn = terror.ClassDDL.New(codeUnsupportedOnGeneratedColumn, mysql.MySQLErrName[mysql.ErrUnsupportedOnGeneratedColumn])
// errGeneratedColumnNonPrior forbiddens to refer generated column non prior to it.
errGeneratedColumnNonPrior = terror.ClassDDL.New(codeGeneratedColumnNonPrior, mysql.MySQLErrName[mysql.ErrGeneratedColumnNonPrior])
// errDependentByGeneratedColumn forbiddens to delete columns which are dependent by generated columns.
errDependentByGeneratedColumn = terror.ClassDDL.New(codeDependentByGeneratedColumn, mysql.MySQLErrName[mysql.ErrDependentByGeneratedColumn])
// errJSONUsedAsKey forbiddens to use JSON as key or index.
errJSONUsedAsKey = terror.ClassDDL.New(codeJSONUsedAsKey, mysql.MySQLErrName[mysql.ErrJSONUsedAsKey])
// errBlobCantHaveDefault forbiddens to give not null default value to TEXT/BLOB/JSON.
errBlobCantHaveDefault = terror.ClassDDL.New(codeBlobCantHaveDefault, mysql.MySQLErrName[mysql.ErrBlobCantHaveDefault])
errTooLongIndexComment = terror.ClassDDL.New(codeErrTooLongIndexComment, mysql.MySQLErrName[mysql.ErrTooLongIndexComment])
// ErrDupKeyName returns for duplicated key name
ErrDupKeyName = terror.ClassDDL.New(codeDupKeyName, "duplicate key name")
// ErrInvalidDBState returns for invalid database state.
ErrInvalidDBState = terror.ClassDDL.New(codeInvalidDBState, "invalid database state")
// ErrInvalidTableState returns for invalid Table state.
ErrInvalidTableState = terror.ClassDDL.New(codeInvalidTableState, "invalid table state")
// ErrInvalidColumnState returns for invalid column state.
ErrInvalidColumnState = terror.ClassDDL.New(codeInvalidColumnState, "invalid column state")
// ErrInvalidIndexState returns for invalid index state.
ErrInvalidIndexState = terror.ClassDDL.New(codeInvalidIndexState, "invalid index state")
// ErrInvalidForeignKeyState returns for invalid foreign key state.
ErrInvalidForeignKeyState = terror.ClassDDL.New(codeInvalidForeignKeyState, "invalid foreign key state")
// ErrUnsupportedModifyPrimaryKey returns an error when add or drop the primary key.
// It's exported for testing.
ErrUnsupportedModifyPrimaryKey = terror.ClassDDL.New(codeUnsupportedModifyPrimaryKey, "unsupported %s primary key")
// ErrColumnBadNull returns for a bad null value.
ErrColumnBadNull = terror.ClassDDL.New(codeBadNull, "column cann't be null")
// ErrCantRemoveAllFields returns for deleting all columns.
ErrCantRemoveAllFields = terror.ClassDDL.New(codeCantRemoveAllFields, "can't delete all columns with ALTER TABLE")
// ErrCantDropFieldOrKey returns for dropping a non-existent field or key.
ErrCantDropFieldOrKey = terror.ClassDDL.New(codeCantDropFieldOrKey, "can't drop field; check that column/key exists")
// ErrInvalidOnUpdate returns for invalid ON UPDATE clause.
ErrInvalidOnUpdate = terror.ClassDDL.New(codeInvalidOnUpdate, "invalid ON UPDATE clause for the column")
// ErrTooLongIdent returns for too long name of database/table/column/index.
ErrTooLongIdent = terror.ClassDDL.New(codeTooLongIdent, mysql.MySQLErrName[mysql.ErrTooLongIdent])
// ErrWrongDBName returns for wrong database name.
ErrWrongDBName = terror.ClassDDL.New(codeWrongDBName, mysql.MySQLErrName[mysql.ErrWrongDBName])
// ErrWrongTableName returns for wrong table name.
ErrWrongTableName = terror.ClassDDL.New(codeWrongTableName, mysql.MySQLErrName[mysql.ErrWrongTableName])
// ErrWrongColumnName returns for wrong column name.
ErrWrongColumnName = terror.ClassDDL.New(codeWrongColumnName, mysql.MySQLErrName[mysql.ErrWrongColumnName])
// ErrWrongNameForIndex returns for wrong index name.
ErrWrongNameForIndex = terror.ClassDDL.New(codeWrongNameForIndex, mysql.MySQLErrName[mysql.ErrWrongNameForIndex])
// ErrUnknownCharacterSet returns unknown character set.
ErrUnknownCharacterSet = terror.ClassDDL.New(codeUnknownCharacterSet, "Unknown character set: '%s'")
)
// DDL is responsible for updating schema in data store and maintaining in-memory InfoSchema cache.
type DDL interface {
CreateSchema(ctx sessionctx.Context, name model.CIStr, charsetInfo *ast.CharsetOpt) error
DropSchema(ctx sessionctx.Context, schema model.CIStr) error
CreateTable(ctx sessionctx.Context, stmt *ast.CreateTableStmt) error
CreateTableWithLike(ctx sessionctx.Context, ident, referIdent ast.Ident, ifNotExists bool) error
DropTable(ctx sessionctx.Context, tableIdent ast.Ident) (err error)
CreateIndex(ctx sessionctx.Context, tableIdent ast.Ident, unique bool, indexName model.CIStr,
columnNames []*ast.IndexColName, indexOption *ast.IndexOption) error
DropIndex(ctx sessionctx.Context, tableIdent ast.Ident, indexName model.CIStr) error
GetInformationSchema() infoschema.InfoSchema
AlterTable(ctx sessionctx.Context, tableIdent ast.Ident, spec []*ast.AlterTableSpec) error
TruncateTable(ctx sessionctx.Context, tableIdent ast.Ident) error
RenameTable(ctx sessionctx.Context, oldTableIdent, newTableIdent ast.Ident) error
// SetLease will reset the lease time for online DDL change,
// it's a very dangerous function and you must guarantee that all servers have the same lease time.
SetLease(ctx context.Context, lease time.Duration)
// GetLease returns current schema lease time.
GetLease() time.Duration
// Stats returns the DDL statistics.
Stats(vars *variable.SessionVars) (map[string]interface{}, error)
// GetScope gets the status variables scope.
GetScope(status string) variable.ScopeFlag
// Stop stops DDL worker.
Stop() error
// RegisterEventCh registers event channel for ddl.
RegisterEventCh(chan<- *util.Event)
// SchemaSyncer gets the schema syncer.
SchemaSyncer() SchemaSyncer
// OwnerManager gets the owner manager, and it's used for testing.
OwnerManager() owner.Manager
// WorkerVars gets the session variables for DDL worker.
WorkerVars() *variable.SessionVars
// SetHook sets the hook. It's exported for testing.
SetHook(h Callback)
// GetHook gets the hook. It's exported for testing.
GetHook() Callback
}
// ddl represents the statements which are used to define the database structure or schema.
type ddl struct {
m sync.RWMutex
infoHandle *infoschema.Handle
hook Callback
hookMu sync.RWMutex
store kv.Storage
ownerManager owner.Manager
schemaSyncer SchemaSyncer
// lease is schema seconds.
lease time.Duration
uuid string
ddlJobCh chan struct{}
ddlJobDoneCh chan struct{}
ddlEventCh chan<- *util.Event
// reorgCtx is for reorganization.
reorgCtx *reorgCtx
quitCh chan struct{}
wait sync.WaitGroup
workerVars *variable.SessionVars
delRangeManager delRangeManager
}
// RegisterEventCh registers passed channel for ddl Event.
func (d *ddl) RegisterEventCh(ch chan<- *util.Event) {
d.ddlEventCh = ch
}
// asyncNotifyEvent will notify the ddl event to outside world, say statistic handle. When the channel is full, we may
// give up notify and log it.
func (d *ddl) asyncNotifyEvent(e *util.Event) {
if d.ddlEventCh != nil {
if d.lease == 0 {
// If lease is 0, it's always used in test.
select {
case d.ddlEventCh <- e:
default:
}
return
}
for i := 0; i < 10; i++ {
select {
case d.ddlEventCh <- e:
return
default:
log.Warnf("Fail to notify event %s.", e)
time.Sleep(time.Microsecond * 10)
}
}
}
}
// NewDDL creates a new DDL.
func NewDDL(ctx context.Context, etcdCli *clientv3.Client, store kv.Storage,
infoHandle *infoschema.Handle, hook Callback, lease time.Duration, ctxPool *pools.ResourcePool) DDL {
return newDDL(ctx, etcdCli, store, infoHandle, hook, lease, ctxPool)
}
func newDDL(ctx context.Context, etcdCli *clientv3.Client, store kv.Storage,
infoHandle *infoschema.Handle, hook Callback, lease time.Duration, ctxPool *pools.ResourcePool) *ddl {
if hook == nil {
hook = &BaseCallback{}
}
id := uuid.NewV4().String()
ctx, cancelFunc := context.WithCancel(ctx)
var manager owner.Manager
var syncer SchemaSyncer
if etcdCli == nil {
// The etcdCli is nil if the store is localstore which is only used for testing.
// So we use mockOwnerManager and mockSchemaSyncer.
manager = owner.NewMockManager(id, cancelFunc)
syncer = NewMockSchemaSyncer()
} else {
manager = owner.NewOwnerManager(etcdCli, ddlPrompt, id, DDLOwnerKey, cancelFunc)
syncer = NewSchemaSyncer(etcdCli, id)
}
d := &ddl{
infoHandle: infoHandle,
hook: hook,
store: store,
uuid: id,
lease: lease,
ddlJobCh: make(chan struct{}, 1),
ddlJobDoneCh: make(chan struct{}, 1),
reorgCtx: &reorgCtx{notifyCancelReorgJob: 0},
ownerManager: manager,
schemaSyncer: syncer,
workerVars: variable.NewSessionVars(),
}
d.workerVars.BinlogClient = binloginfo.GetPumpClient()
if ctxPool != nil {
supportDelRange := store.SupportDeleteRange()
d.delRangeManager = newDelRangeManager(d, ctxPool, supportDelRange)
log.Infof("[ddl] start delRangeManager OK, with emulator: %t", !supportDelRange)
} else {
d.delRangeManager = newMockDelRangeManager()
}
d.start(ctx)
variable.RegisterStatistics(d)
log.Infof("[ddl] start DDL:%s", d.uuid)
metrics.DDLCounter.WithLabelValues(metrics.CreateDDL).Inc()
return d
}
func (d *ddl) Stop() error {
d.m.Lock()
defer d.m.Unlock()
d.close()
log.Infof("[ddl] stop DDL:%s", d.uuid)
return nil
}
func (d *ddl) start(ctx context.Context) {
d.quitCh = make(chan struct{})
// If RunWorker is true, we need campaign owner and do DDL job.
// Otherwise, we needn't do that.
if RunWorker {
err := d.ownerManager.CampaignOwner(ctx)
terror.Log(errors.Trace(err))
d.wait.Add(1)
go d.onDDLWorker()
metrics.DDLCounter.WithLabelValues(metrics.CreateDDLWorker).Inc()
}
// For every start, we will send a fake job to let worker
// check owner firstly and try to find whether a job exists and run.
asyncNotify(d.ddlJobCh)
d.delRangeManager.start()
}
func (d *ddl) close() {
if d.isClosed() {
return
}
close(d.quitCh)
d.ownerManager.Cancel()
err := d.schemaSyncer.RemoveSelfVersionPath()
if err != nil {
log.Errorf("[ddl] remove self version path failed %v", err)
}
d.wait.Wait()
d.delRangeManager.clear()
log.Infof("[ddl] close DDL:%s", d.uuid)
}
func (d *ddl) isClosed() bool {
select {
case <-d.quitCh:
return true
default:
return false
}
}
func (d *ddl) SetLease(ctx context.Context, lease time.Duration) {
d.m.Lock()
defer d.m.Unlock()
if lease == d.lease {
return
}
log.Warnf("[ddl] change schema lease %s -> %s", d.lease, lease)
if d.isClosed() {
// If already closed, just set lease and return.
d.lease = lease
return
}
// Close the running worker and start again.
d.close()
d.lease = lease
d.start(ctx)
}
func (d *ddl) GetLease() time.Duration {
d.m.RLock()
lease := d.lease
d.m.RUnlock()
return lease
}
func (d *ddl) GetInformationSchema() infoschema.InfoSchema {
return d.infoHandle.Get()
}
func (d *ddl) genGlobalID() (int64, error) {
var globalID int64
err := kv.RunInNewTxn(d.store, true, func(txn kv.Transaction) error {
var err error
globalID, err = meta.NewMeta(txn).GenGlobalID()
return errors.Trace(err)
})
return globalID, errors.Trace(err)
}
// SchemaSyncer implements DDL.SchemaSyncer interface.
func (d *ddl) SchemaSyncer() SchemaSyncer {
return d.schemaSyncer
}
// OwnerManager implements DDL.OwnerManager interface.
func (d *ddl) OwnerManager() owner.Manager {
return d.ownerManager
}
func checkJobMaxInterval(job *model.Job) time.Duration {
// The job of adding index takes more time to process.
// So it uses the longer time.
if job.Type == model.ActionAddIndex {
return 3 * time.Second
}
return 1 * time.Second
}
func (d *ddl) doDDLJob(ctx sessionctx.Context, job *model.Job) error {
// For every DDL, we must commit current transaction.
if err := ctx.NewTxn(); err != nil {
return errors.Trace(err)
}
// Get a global job ID and put the DDL job in the queue.
err := d.addDDLJob(ctx, job)
if err != nil {
return errors.Trace(err)
}
// Notice worker that we push a new job and wait the job done.
asyncNotify(d.ddlJobCh)
log.Infof("[ddl] start DDL job %s, Query:%s", job, job.Query)
var historyJob *model.Job
jobID := job.ID
// For a job from start to end, the state of it will be none -> delete only -> write only -> reorganization -> public
// For every state changes, we will wait as lease 2 * lease time, so here the ticker check is 10 * lease.
// But we use etcd to speed up, normally it takes less than 1s now, so we use 1s or 3s as the max value.
ticker := time.NewTicker(chooseLeaseTime(10*d.lease, checkJobMaxInterval(job)))
startTime := time.Now()
metrics.JobsGauge.WithLabelValues(job.Type.String()).Inc()
defer func() {
ticker.Stop()
metrics.JobsGauge.WithLabelValues(job.Type.String()).Dec()
metrics.HandleJobHistogram.WithLabelValues(job.Type.String(), metrics.RetLabel(err)).Observe(time.Since(startTime).Seconds())
}()
for {
select {
case <-d.ddlJobDoneCh:
case <-ticker.C:
}
historyJob, err = d.getHistoryDDLJob(jobID)
if err != nil {
log.Errorf("[ddl] get history DDL job err %v, check again", err)
continue
} else if historyJob == nil {
log.Debugf("[ddl] DDL job %d is not in history, maybe not run", jobID)
continue
}
// If a job is a history job, the state must be JobSynced or JobCancel.
if historyJob.IsSynced() {
log.Infof("[ddl] DDL job %d is finished", jobID)
return nil
}
if historyJob.Error != nil {
return errors.Trace(historyJob.Error)
}
panic("When the state is JobCancel, historyJob.Error should never be nil")
}
}
func (d *ddl) callHookOnChanged(err error) error {
d.hookMu.Lock()
defer d.hookMu.Unlock()
err = d.hook.OnChanged(err)
return errors.Trace(err)
}
// SetHook implements DDL.SetHook interface.
func (d *ddl) SetHook(h Callback) {
d.hookMu.Lock()
defer d.hookMu.Unlock()
d.hook = h
}
// GetHook implements DDL.GetHook interface.
func (d *ddl) GetHook() Callback {
d.hookMu.RLock()
defer d.hookMu.RUnlock()
return d.hook
}
func (d *ddl) WorkerVars() *variable.SessionVars {
return d.workerVars
}
// DDL error codes.
const (
codeInvalidWorker terror.ErrCode = 1
codeNotOwner = 2
codeInvalidDDLJob = 3
codeInvalidJobFlag = 5
codeRunMultiSchemaChanges = 6
codeWaitReorgTimeout = 7
codeInvalidStoreVer = 8
codeUnknownTypeLength = 9
codeUnknownFractionLength = 10
codeInvalidJobVersion = 11
codeCancelledDDLJob = 12
codeInvalidRanges = 13
codeReorgWorkerPanic = 14
codeInvalidDBState = 100
codeInvalidTableState = 101
codeInvalidColumnState = 102
codeInvalidIndexState = 103
codeInvalidForeignKeyState = 104
codeCantDropColWithIndex = 201
codeUnsupportedAddColumn = 202
codeUnsupportedModifyColumn = 203
codeUnsupportedDropPKHandle = 204
codeUnsupportedCharset = 205
codeUnsupportedModifyPrimaryKey = 206
codeUnsupportedShardRowIDBits = 207
codeFileNotFound = 1017
codeErrorOnRename = 1025
codeBadNull = 1048
codeBadField = 1054
codeTooLongIdent = 1059
codeDupKeyName = 1061
codeTooLongKey = 1071
codeKeyColumnDoesNotExits = 1072
codeIncorrectPrefixKey = 1089
codeCantRemoveAllFields = 1090
codeCantDropFieldOrKey = 1091
codeBlobCantHaveDefault = 1101
codeWrongDBName = 1102
codeWrongTableName = 1103
codeTooManyFields = 1117
codeInvalidUseOfNull = 1138
codeWrongColumnName = 1166
codeWrongKeyColumn = 1167
codeBlobKeyWithoutLength = 1170
codeInvalidOnUpdate = 1294
codeUnsupportedOnGeneratedColumn = 3106
codeGeneratedColumnNonPrior = 3107
codeDependentByGeneratedColumn = 3108
codeJSONUsedAsKey = 3152
codeWrongNameForIndex = terror.ErrCode(mysql.ErrWrongNameForIndex)
codeErrTooLongIndexComment = terror.ErrCode(mysql.ErrTooLongIndexComment)
codeUnknownCharacterSet = terror.ErrCode(mysql.ErrUnknownCharacterSet)
)
func init() {
ddlMySQLErrCodes := map[terror.ErrCode]uint16{
codeBadNull: mysql.ErrBadNull,
codeCantRemoveAllFields: mysql.ErrCantRemoveAllFields,
codeCantDropFieldOrKey: mysql.ErrCantDropFieldOrKey,
codeInvalidOnUpdate: mysql.ErrInvalidOnUpdate,
codeBlobKeyWithoutLength: mysql.ErrBlobKeyWithoutLength,
codeIncorrectPrefixKey: mysql.ErrWrongSubKey,
codeTooLongIdent: mysql.ErrTooLongIdent,
codeTooLongKey: mysql.ErrTooLongKey,
codeKeyColumnDoesNotExits: mysql.ErrKeyColumnDoesNotExits,
codeDupKeyName: mysql.ErrDupKeyName,
codeWrongDBName: mysql.ErrWrongDBName,
codeWrongTableName: mysql.ErrWrongTableName,
codeFileNotFound: mysql.ErrFileNotFound,
codeErrorOnRename: mysql.ErrErrorOnRename,
codeBadField: mysql.ErrBadField,
codeInvalidUseOfNull: mysql.ErrInvalidUseOfNull,
codeUnsupportedOnGeneratedColumn: mysql.ErrUnsupportedOnGeneratedColumn,
codeGeneratedColumnNonPrior: mysql.ErrGeneratedColumnNonPrior,
codeDependentByGeneratedColumn: mysql.ErrDependentByGeneratedColumn,
codeJSONUsedAsKey: mysql.ErrJSONUsedAsKey,
codeBlobCantHaveDefault: mysql.ErrBlobCantHaveDefault,
codeWrongColumnName: mysql.ErrWrongColumnName,
codeWrongKeyColumn: mysql.ErrWrongKeyColumn,
codeWrongNameForIndex: mysql.ErrWrongNameForIndex,
codeTooManyFields: mysql.ErrTooManyFields,
codeErrTooLongIndexComment: mysql.ErrTooLongIndexComment,
codeUnknownCharacterSet: mysql.ErrUnknownCharacterSet,
}
terror.ErrClassToMySQLCodes[terror.ClassDDL] = ddlMySQLErrCodes
}