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*: support create table and drop table.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| // 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/meta" | ||
| "github.com/pingcap/tidb/meta/autoid" | ||
| "github.com/pingcap/tidb/model" | ||
| "github.com/pingcap/tidb/table" | ||
| "github.com/reborndb/go/errors2" | ||
| ) | ||
|
|
||
| func (d *ddl) onTableCreate(t *meta.TMeta, 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 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(ErrExists) | ||
| } | ||
|
|
||
| tbInfo = tbl | ||
| } | ||
| } | ||
|
|
||
| _, err = t.GenSchemaVersion() | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| switch tbInfo.State { | ||
| case model.StateNone: | ||
| // none -> delete only | ||
| tbInfo.State = model.StateDeleteOnly | ||
| err = t.CreateTable(schemaID, tbInfo) | ||
| return errors.Trace(err) | ||
| case model.StateDeleteOnly: | ||
| // delete only -> write only | ||
| tbInfo.State = model.StateWriteOnly | ||
| err = t.UpdateTable(schemaID, tbInfo) | ||
| return errors.Trace(err) | ||
| case model.StateWriteOnly: | ||
| // write only -> public | ||
| tbInfo.State = model.StatePublic | ||
| err = t.UpdateTable(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) onTableDrop(t *meta.TMeta, job *model.Job) error { | ||
| schemaID := job.SchemaID | ||
| tableID := job.TableID | ||
|
|
||
| tblInfo, err := t.GetTable(schemaID, tableID) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } else if tblInfo == nil { | ||
| job.State = model.JobCancelled | ||
| return errors.Trace(ErrNotExists) | ||
| } | ||
|
|
||
| _, err = t.GenSchemaVersion() | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| switch tblInfo.State { | ||
| case model.StatePublic: | ||
| // public -> write only | ||
| tblInfo.State = model.StateWriteOnly | ||
| err = t.UpdateTable(schemaID, tblInfo) | ||
| return errors.Trace(err) | ||
| case model.StateWriteOnly: | ||
| // write only -> delete only | ||
| tblInfo.State = model.StateDeleteOnly | ||
| err = t.UpdateTable(schemaID, tblInfo) | ||
| return errors.Trace(err) | ||
| case model.StateDeleteOnly: | ||
| // delete only -> reorganization | ||
| tblInfo.State = model.StateReorgnization | ||
| err = t.UpdateTable(schemaID, tblInfo) | ||
| return errors.Trace(err) | ||
| case model.StateReorgnization: | ||
| // reorganization -> absent | ||
| var dbInfo *model.DBInfo | ||
| dbInfo, err = t.GetDatabase(schemaID) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| err = d.runReorgJob(func() error { | ||
| return d.dropTableData(dbInfo, tblInfo) | ||
| }) | ||
|
|
||
| if errors2.ErrorEqual(err, errWaitReorgTimeout) { | ||
| // if timeout, we should return, check for the owner and re-wait job done. | ||
| return nil | ||
| } | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| // all reorgnization jobs done, drop this database | ||
| if err = t.DropTable(schemaID, tableID); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| // finish this job | ||
| job.State = model.JobDone | ||
| return nil | ||
| default: | ||
| return errors.Errorf("invalid table state %v", tblInfo.State) | ||
| } | ||
| } | ||
|
|
||
| func (d *ddl) dropTableData(dbInfo *model.DBInfo, tblInfo *model.TableInfo) error { | ||
| ctx := d.newReorgContext() | ||
| txn, err := ctx.GetTxn(true) | ||
|
|
||
| alloc := autoid.NewAllocator(d.meta, dbInfo.ID) | ||
| t := table.TableFromMeta(dbInfo.Name.L, alloc, tblInfo) | ||
| err = t.Truncate(ctx) | ||
| if err != nil { | ||
| ctx.FinishTxn(true) | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| // Remove indices. | ||
| for _, v := range t.Indices() { | ||
| if v != nil && v.X != nil { | ||
| if err = v.X.Drop(txn); err != nil { | ||
| ctx.FinishTxn(true) | ||
| return errors.Trace(err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return errors.Trace(ctx.FinishTxn(false)) | ||
| } |
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