70 lines
2.6 KiB
Go
70 lines
2.6 KiB
Go
// Copyright 2024 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,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package meta
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/pingcap/tidb/pkg/kv"
|
|
"github.com/pingcap/tidb/pkg/meta/model"
|
|
"github.com/pingcap/tidb/pkg/structure"
|
|
)
|
|
|
|
// Reader is the meta reader
|
|
type Reader interface {
|
|
GetDatabase(dbID int64) (*model.DBInfo, error)
|
|
ListDatabases() ([]*model.DBInfo, error)
|
|
GetTable(dbID int64, tableID int64) (*model.TableInfo, error)
|
|
ListTables(ctx context.Context, dbID int64) ([]*model.TableInfo, error)
|
|
ListSimpleTables(dbID int64) ([]*model.TableNameInfo, error)
|
|
IterTables(dbID int64, fn func(info *model.TableInfo) error) error
|
|
GetAutoIDAccessors(dbID, tableID int64) AutoIDAccessors
|
|
GetAllNameToIDAndTheMustLoadedTableInfo(dbID int64) (map[string]int64, []*model.TableInfo, error)
|
|
|
|
GetMetadataLock() (enable bool, isNull bool, err error)
|
|
GetHistoryDDLJob(id int64) (*model.Job, error)
|
|
GetHistoryDDLCount() (uint64, error)
|
|
GetLastHistoryDDLJobsIterator() (LastJobIterator, error)
|
|
GetHistoryDDLJobsIterator(startJobID int64) (LastJobIterator, error)
|
|
|
|
GetSchemaVersion() (int64, error)
|
|
EncodeSchemaDiffKey(schemaVersion int64) kv.Key
|
|
GetSchemaDiff(schemaVersion int64) (*model.SchemaDiff, error)
|
|
GetSchemaVersionWithNonEmptyDiff() (int64, error)
|
|
|
|
GetPolicyID() (int64, error)
|
|
GetPolicy(policyID int64) (*model.PolicyInfo, error)
|
|
ListPolicies() ([]*model.PolicyInfo, error)
|
|
|
|
GetRUStats() (*RUStats, error)
|
|
GetResourceGroup(groupID int64) (*model.ResourceGroupInfo, error)
|
|
ListResourceGroups() ([]*model.ResourceGroupInfo, error)
|
|
|
|
GetMetasByDBID(dbID int64) ([]structure.HashPair, error)
|
|
GetGlobalID() (int64, error)
|
|
GetBDRRole() (string, error)
|
|
GetSystemDBID() (int64, error)
|
|
GetSchemaCacheSize() (size uint64, isNull bool, err error)
|
|
GetBootstrapVersion() (int64, error)
|
|
}
|
|
|
|
// NewReader creates a meta Reader in snapshot.
|
|
func NewReader(snapshot kv.Snapshot) Reader {
|
|
snapshot.SetOption(kv.RequestSourceInternal, true)
|
|
snapshot.SetOption(kv.RequestSourceType, kv.InternalTxnMeta)
|
|
t := structure.NewStructure(snapshot, nil, mMetaPrefix)
|
|
return &Mutator{txn: t}
|
|
}
|