You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
195 lines
5.0 KiB
Go
195 lines
5.0 KiB
Go
8 years ago
|
// 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 (
|
||
|
"github.com/juju/errors"
|
||
|
"github.com/pingcap/tidb/infoschema"
|
||
|
"github.com/pingcap/tidb/meta"
|
||
|
"github.com/pingcap/tidb/meta/autoid"
|
||
|
"github.com/pingcap/tidb/model"
|
||
|
"github.com/pingcap/tidb/table"
|
||
|
"github.com/pingcap/tidb/terror"
|
||
|
)
|
||
|
|
||
|
func (d *ddl) onCreateTable(t *meta.Meta, job *model.Job) error {
|
||
|
schemaID := job.SchemaID
|
||
|
tbInfo := &model.TableInfo{}
|
||
|
if err := job.DecodeArgs(tbInfo); err != nil {
|
||
|
// arg error, cancel this job.
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
tbInfo.State = model.StateNone
|
||
|
|
||
|
tables, err := t.ListTables(schemaID)
|
||
|
if terror.ErrorEqual(err, meta.ErrDBNotExists) {
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(infoschema.DatabaseNotExists)
|
||
|
} else if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
for _, tbl := range tables {
|
||
|
if tbl.Name.L == tbInfo.Name.L {
|
||
|
if tbl.ID != tbInfo.ID {
|
||
|
// table exists, can't create, we should cancel this job now.
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(infoschema.TableExists)
|
||
|
}
|
||
|
|
||
|
tbInfo = tbl
|
||
|
}
|
||
|
}
|
||
|
|
||
|
_, err = t.GenSchemaVersion()
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
switch tbInfo.State {
|
||
|
case model.StateNone:
|
||
|
// none -> public
|
||
|
job.SchemaState = model.StatePublic
|
||
|
tbInfo.State = model.StatePublic
|
||
|
err = t.CreateTable(schemaID, tbInfo)
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
// finish this job
|
||
|
job.State = model.JobDone
|
||
|
return nil
|
||
|
default:
|
||
|
return errors.Errorf("invalid table state %v", tbInfo.State)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (d *ddl) delReorgTable(t *meta.Meta, job *model.Job) error {
|
||
|
tblInfo := &model.TableInfo{}
|
||
|
err := job.DecodeArgs(tblInfo)
|
||
|
if err != nil {
|
||
|
// arg error, cancel this job.
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
tblInfo.State = model.StateDeleteReorganization
|
||
|
tbl, err := d.getTable(job.SchemaID, tblInfo)
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
err = d.dropTableData(tbl)
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
// finish this background job
|
||
|
job.SchemaState = model.StateNone
|
||
|
job.State = model.JobDone
|
||
|
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func (d *ddl) onDropTable(t *meta.Meta, job *model.Job) error {
|
||
|
schemaID := job.SchemaID
|
||
|
tableID := job.TableID
|
||
|
|
||
|
tblInfo, err := t.GetTable(schemaID, tableID)
|
||
|
if terror.ErrorEqual(err, meta.ErrDBNotExists) {
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(infoschema.DatabaseNotExists)
|
||
|
} else if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
if tblInfo == nil {
|
||
|
job.State = model.JobCancelled
|
||
|
return errors.Trace(infoschema.TableNotExists)
|
||
|
}
|
||
|
|
||
|
_, err = t.GenSchemaVersion()
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
switch tblInfo.State {
|
||
|
case model.StatePublic:
|
||
|
// public -> write only
|
||
|
job.SchemaState = model.StateWriteOnly
|
||
|
tblInfo.State = model.StateWriteOnly
|
||
|
err = t.UpdateTable(schemaID, tblInfo)
|
||
|
case model.StateWriteOnly:
|
||
|
// write only -> delete only
|
||
|
job.SchemaState = model.StateDeleteOnly
|
||
|
tblInfo.State = model.StateDeleteOnly
|
||
|
err = t.UpdateTable(schemaID, tblInfo)
|
||
|
case model.StateDeleteOnly:
|
||
|
tblInfo.State = model.StateNone
|
||
|
err = t.UpdateTable(schemaID, tblInfo)
|
||
|
if err = t.DropTable(job.SchemaID, job.TableID); err != nil {
|
||
|
break
|
||
|
}
|
||
|
// finish this job
|
||
|
job.Args = []interface{}{tblInfo}
|
||
|
job.State = model.JobDone
|
||
|
job.SchemaState = model.StateNone
|
||
|
default:
|
||
|
err = errors.Errorf("invalid table state %v", tblInfo.State)
|
||
|
}
|
||
|
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
func (d *ddl) getTable(schemaID int64, tblInfo *model.TableInfo) (table.Table, error) {
|
||
|
alloc := autoid.NewAllocator(d.store, schemaID)
|
||
|
tbl, err := table.TableFromMeta(alloc, tblInfo)
|
||
|
return tbl, errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
func (d *ddl) getTableInfo(t *meta.Meta, job *model.Job) (*model.TableInfo, error) {
|
||
|
schemaID := job.SchemaID
|
||
|
tableID := job.TableID
|
||
|
tblInfo, err := t.GetTable(schemaID, tableID)
|
||
|
if terror.ErrorEqual(err, meta.ErrDBNotExists) {
|
||
|
job.State = model.JobCancelled
|
||
|
return nil, errors.Trace(infoschema.DatabaseNotExists)
|
||
|
} else if err != nil {
|
||
|
return nil, errors.Trace(err)
|
||
|
} else if tblInfo == nil {
|
||
|
job.State = model.JobCancelled
|
||
|
return nil, errors.Trace(infoschema.TableNotExists)
|
||
|
}
|
||
|
|
||
|
if tblInfo.State != model.StatePublic {
|
||
|
job.State = model.JobCancelled
|
||
|
return nil, errors.Errorf("table %s is not in public, but %s", tblInfo.Name.L, tblInfo.State)
|
||
|
}
|
||
|
|
||
|
return tblInfo, nil
|
||
|
}
|
||
|
|
||
|
func (d *ddl) dropTableData(t table.Table) error {
|
||
|
// delete table data
|
||
|
err := d.delKeysWithPrefix(t.RecordPrefix())
|
||
|
if err != nil {
|
||
|
return errors.Trace(err)
|
||
|
}
|
||
|
|
||
|
// delete table index
|
||
|
err = d.delKeysWithPrefix(t.IndexPrefix())
|
||
|
|
||
|
return errors.Trace(err)
|
||
|
}
|