Function EncodeFromOldRow

pkg/util/rowcodec/main_test.go:40–65

EncodeFromOldRow encodes a row from an old-format row. this method will be used in test.

(encoder *Encoder, loc *time.Location, oldRow, buf []byte)

// EncodeFromOldRow encodes a row from an old-format row.
// this method will be used in test.
func EncodeFromOldRow(encoder *Encoder, loc *time.Location, oldRow, buf []byte) ([]byte, error) {
	if len(oldRow) > 0 && oldRow[0] == CodecVer {
		return oldRow, nil
	}
	encoder.reset()
	for len(oldRow) > 1 {
		var d types.Datum
		var err error
		oldRow, d, err = codec.DecodeOne(oldRow)
		if err != nil {
			return nil, err
		}
		colID := d.GetInt64()
		oldRow, d, err = codec.DecodeOne(oldRow)
		if err != nil {
			return nil, err
		}
		encoder.appendColVal(colID, &d)
	}
	numCols, notNullIdx := encoder.reformatCols()
	err := encoder.encodeRowCols(loc, numCols, notNullIdx)
	if err != nil {
		return nil, err
	}
	return encoder.row.toBytes(buf[:0]), nil
}