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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| // 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 logclient | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| backuppb "github.com/pingcap/kvproto/pkg/brpb" | ||
| "github.com/pingcap/log" | ||
| "github.com/pingcap/tidb/br/pkg/stream" | ||
| "github.com/pingcap/tidb/br/pkg/utils" | ||
| "github.com/pingcap/tidb/br/pkg/utils/consts" | ||
| "github.com/pingcap/tidb/pkg/meta" | ||
| "github.com/pingcap/tidb/pkg/meta/model" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| // BatchFileProcessor defines how to process a batch of files | ||
| type BatchFileProcessor interface { | ||
| // process a batch of files and with a filterTS and return what's not processed for next iteration | ||
| processBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) | ||
| } | ||
|
|
||
| // RestoreProcessor implements BatchFileProcessor for restoring files | ||
| type RestoreProcessor struct { | ||
| client *LogClient | ||
| schemasReplace *stream.SchemasReplace | ||
| updateStats func(kvCount uint64, size uint64) | ||
| progressInc func() | ||
| } | ||
|
|
||
| func (rp *RestoreProcessor) processBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) { | ||
| return rp.client.RestoreBatchMetaKVFiles( | ||
| ctx, files, rp.schemasReplace, entries, | ||
| filterTS, rp.updateStats, rp.progressInc, cf, | ||
| ) | ||
| } | ||
|
|
||
| // DDLCollector implements BatchFileProcessor for collecting DDL information | ||
| // 1. It collects table renaming information. The table rename operation will not change the table id, and the process | ||
| // will drop the original table and create a new one with the same table id, so in DDL history there will be two events | ||
| // that corresponds to the same table id. | ||
| // | ||
| // add more logic in future if needed | ||
| type DDLCollector struct { | ||
| client *LogClient | ||
| tableRenameInfo *stream.LogBackupTableHistory | ||
| } | ||
|
|
||
| func (dc *DDLCollector) processBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) { | ||
| // doesn't need to parse writeCF as it contains value like "p\XXXX\XXX" which is meaningless. | ||
| // DefaultCF value should contain everything we want for DDL operation | ||
| if cf == consts.WriteCF { | ||
| return nil, nil | ||
| } | ||
|
|
||
| curSortedEntries, filteredEntries, err := dc.client.filterAndSortKvEntriesFromFiles(ctx, files, entries, filterTS) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| // process entries to collect table IDs | ||
| for _, entry := range curSortedEntries { | ||
| value := entry.E.Value | ||
|
|
||
| if utils.IsMetaDBKey(entry.E.Key) { | ||
| rawKey, err := stream.ParseTxnMetaKeyFrom(entry.E.Key) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| // collect db id -> name mapping during log backup, it will contain information about newly created db | ||
| if meta.IsDBkey(rawKey.Field) { | ||
| var dbInfo model.DBInfo | ||
| if err := json.Unmarshal(value, &dbInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| dc.tableRenameInfo.RecordDBIdToName(dbInfo.ID, dbInfo.Name.O) | ||
| } else if !meta.IsDBkey(rawKey.Key) { | ||
| // also see RewriteMetaKvEntry | ||
| continue | ||
| } | ||
|
|
||
| // collect table history indexed by table id, same id may have different table names in history | ||
| if meta.IsTableKey(rawKey.Field) { | ||
| var tableInfo model.TableInfo | ||
| if err := json.Unmarshal(value, &tableInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| // cannot use dbib in the parsed table info cuz it might not set so default to 0 | ||
| dbID, err := meta.ParseDBKey(rawKey.Key) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| log.Info("######################################## adding table info", zap.Int64("tableid", tableInfo.ID), zap.String("table name", tableInfo.Name.O), zap.Int64("db id", dbID)) | ||
| dc.tableRenameInfo.AddTableHistory(tableInfo.ID, tableInfo.Name.String(), dbID) | ||
| } | ||
| } | ||
| } | ||
| return filteredEntries, nil | ||
| } |
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