forked from pingcap/br
/
kv2sql.go
62 lines (52 loc) · 2.04 KB
/
kv2sql.go
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// Copyright 2021 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 kv
import (
"github.com/pingcap/parser/model"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/table"
"github.com/pingcap/tidb/table/tables"
"github.com/pingcap/tidb/tablecodec"
"github.com/pingcap/tidb/types"
"github.com/pingcap/br/pkg/lightning/metric"
)
type TableKVDecoder struct {
tbl table.Table
se *session
}
func (t *TableKVDecoder) DecodeHandleFromTable(key []byte) (kv.Handle, error) {
return tablecodec.DecodeRowKey(key)
}
func (t *TableKVDecoder) EncodeHandleKey(h kv.Handle) kv.Key {
return tablecodec.EncodeRowKeyWithHandle(t.tbl.Meta().ID, h)
}
func (t *TableKVDecoder) DecodeHandleFromIndex(indexInfo *model.IndexInfo, key []byte, value []byte) (kv.Handle, error) {
cols := tables.BuildRowcodecColInfoForIndexColumns(indexInfo, t.tbl.Meta())
return tablecodec.DecodeIndexHandle(key, value, len(cols))
}
// DecodeRawRowData decodes raw row data into a datum slice and a (columnID:columnValue) map.
func (t *TableKVDecoder) DecodeRawRowData(h kv.Handle, value []byte) ([]types.Datum, map[int64]types.Datum, error) {
return tables.DecodeRawRowData(t.se, t.tbl.Meta(), h, t.tbl.Cols(), value)
}
func NewTableKVDecoder(tbl table.Table, options *SessionOptions) (*TableKVDecoder, error) {
metric.KvEncoderCounter.WithLabelValues("open").Inc()
se := newSession(options)
cols := tbl.Cols()
// Set CommonAddRecordCtx to session to reuse the slices and BufStore in AddRecord
recordCtx := tables.NewCommonAddRecordCtx(len(cols))
tables.SetAddRecordCtx(se, recordCtx)
return &TableKVDecoder{
tbl: tbl,
se: se,
}, nil
}