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49 lines
1.4 KiB
49 lines
1.4 KiB
// Copyright 2019 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rowcodec
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import (
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"github.com/pingcap/tidb/sessionctx/stmtctx"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/codec"
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)
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// EncodeFromOldRow encodes a row from an old-format row.
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// this method will be used in test.
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func EncodeFromOldRow(encoder *Encoder, sc *stmtctx.StatementContext, oldRow, buf []byte) ([]byte, error) {
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if len(oldRow) > 0 && oldRow[0] == CodecVer {
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return oldRow, nil
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}
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encoder.reset()
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for len(oldRow) > 1 {
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var d types.Datum
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var err error
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oldRow, d, err = codec.DecodeOne(oldRow)
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if err != nil {
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return nil, err
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}
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colID := d.GetInt64()
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oldRow, d, err = codec.DecodeOne(oldRow)
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if err != nil {
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return nil, err
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}
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encoder.appendColVal(colID, d)
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}
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numCols, notNullIdx := encoder.reformatCols()
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err := encoder.encodeRowCols(sc, numCols, notNullIdx)
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if err != nil {
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return nil, err
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}
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return encoder.row.toBytes(buf[:0]), nil
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}
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