func (d *ddl) onDropSchema(t *meta.Meta, job *model.Job) error {
dbInfo, err := t.GetDatabase(job.SchemaID)
if err != nil {
return errors.Trace(err)
}
if dbInfo == nil {
job.State = model.JobCancelled
return errors.Trace(infoschema.ErrDatabaseDropExists)
}
ver, err := updateSchemaVersion(t, job)
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StatePublic:
// public -> write only
job.SchemaState = model.StateWriteOnly
dbInfo.State = model.StateWriteOnly
err = t.UpdateDatabase(dbInfo)
case model.StateWriteOnly:
// write only -> delete only
job.SchemaState = model.StateDeleteOnly
dbInfo.State = model.StateDeleteOnly
err = t.UpdateDatabase(dbInfo)
case model.StateDeleteOnly:
dbInfo.State = model.StateNone
tables, err := t.ListTables(job.SchemaID)
if err != nil {
return errors.Trace(err)
}
err = t.UpdateDatabase(dbInfo)
if err = t.DropDatabase(dbInfo.ID); err != nil {
break
}
// finish this job
addDBHistoryInfo(job, ver, dbInfo)
if len(tables) > 0 {
job.Args = append(job.Args, getIDs(tables))
}
job.State = model.JobDone
job.SchemaState = model.StateNone
default:
// we can't enter here.
err = errors.Errorf("invalid db state %v", dbInfo.State)
}
return errors.Trace(err)
}
func (d *ddl) onDropSchema(t *meta.Meta, job *model.Job) error {
dbInfo, err := t.GetDatabase(job.SchemaID)
if err != nil {
return errors.Trace(err)
}
if dbInfo == nil {
job.State = model.JobCancelled
return errors.Trace(infoschema.ErrDatabaseNotExists)
}
_, err = t.GenSchemaVersion()
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StatePublic:
// public -> write only
job.SchemaState = model.StateWriteOnly
dbInfo.State = model.StateWriteOnly
err = t.UpdateDatabase(dbInfo)
case model.StateWriteOnly:
// write only -> delete only
job.SchemaState = model.StateDeleteOnly
dbInfo.State = model.StateDeleteOnly
err = t.UpdateDatabase(dbInfo)
case model.StateDeleteOnly:
dbInfo.State = model.StateDeleteReorganization
err = t.UpdateDatabase(dbInfo)
if err = t.DropDatabase(dbInfo.ID); err != nil {
break
}
// finish this job
job.Args = []interface{}{dbInfo}
job.State = model.JobDone
job.SchemaState = model.StateNone
default:
// we can't enter here.
err = errors.Errorf("invalid db state %v", dbInfo.State)
}
return errors.Trace(err)
}
func (d *ddl) onDropSchema(t *meta.Meta, job *model.Job) error {
dbInfo, err := t.GetDatabase(job.SchemaID)
if err != nil {
return errors.Trace(err)
}
if dbInfo == nil {
job.State = model.JobCancelled
return errors.Trace(ErrNotExists)
}
_, err = t.GenSchemaVersion()
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StatePublic:
// public -> write only
job.SchemaState = model.StateWriteOnly
dbInfo.State = model.StateWriteOnly
err = t.UpdateDatabase(dbInfo)
return errors.Trace(err)
case model.StateWriteOnly:
// write only -> delete only
job.SchemaState = model.StateDeleteOnly
dbInfo.State = model.StateDeleteOnly
err = t.UpdateDatabase(dbInfo)
return errors.Trace(err)
case model.StateDeleteOnly:
// delete only -> reorganization
job.SchemaState = model.StateDeleteReorganization
dbInfo.State = model.StateDeleteReorganization
err = t.UpdateDatabase(dbInfo)
return errors.Trace(err)
case model.StateDeleteReorganization:
// wait reorganization jobs done and drop meta.
var tables []*model.TableInfo
tables, err = t.ListTables(dbInfo.ID)
if err != nil {
return errors.Trace(err)
}
err = d.runReorgJob(func() error {
return d.dropSchemaData(dbInfo, tables)
})
if terror.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 reorganization jobs done, drop this database
if err = t.DropDatabase(dbInfo.ID); err != nil {
return errors.Trace(err)
}
// finish this job
job.State = model.JobDone
job.SchemaState = model.StateNone
return nil
default:
// we can't enter here.
return errors.Errorf("invalid db state %v", dbInfo.State)
}
}
func (d *ddl) onCreateSchema(t *meta.Meta, job *model.Job) error {
schemaID := job.SchemaID
var name model.CIStr
if err := job.DecodeArgs(&name); err != nil {
// arg error, cancel this job.
job.State = model.JobCancelled
return errors.Trace(err)
}
dbInfo := &model.DBInfo{
ID: schemaID,
Name: name,
State: model.StateNone,
}
dbs, err := t.ListDatabases()
if err != nil {
return errors.Trace(err)
}
for _, db := range dbs {
if db.Name.L == name.L {
if db.ID != schemaID {
// database exists, can't create, we should cancel this job now.
job.State = model.JobCancelled
return errors.Trace(ErrExists)
}
dbInfo = db
}
}
_, err = t.GenSchemaVersion()
if err != nil {
return errors.Trace(err)
}
switch dbInfo.State {
case model.StateNone:
// none -> delete only
job.SchemaState = model.StateDeleteOnly
dbInfo.State = model.StateDeleteOnly
err = t.CreateDatabase(dbInfo)
return errors.Trace(err)
case model.StateDeleteOnly:
// delete only -> write only
job.SchemaState = model.StateWriteOnly
dbInfo.State = model.StateWriteOnly
err = t.UpdateDatabase(dbInfo)
return errors.Trace(err)
case model.StateWriteOnly:
// write only -> public
job.SchemaState = model.StatePublic
dbInfo.State = model.StatePublic
err = t.UpdateDatabase(dbInfo)
if err != nil {
return errors.Trace(err)
}
// finish this job.
job.State = model.JobDone
return nil
default:
// we can't enter here.
return errors.Errorf("invalid db state %v", dbInfo.State)
}
}