// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.
//

syntax="proto2";

package impala;

import "common.proto";

// The serialized version of a header of a RowBatch (in be/src/runtime/row-batch.h).
// It contains the meta-data of a row batch. The actual data of a row batch is sent
// as KRPC sidecars. Please see TransmitDataRequestPB for details.
// All fields are required in V1.
message RowBatchHeaderPB {
  // Total number of rows contained in this batch.
  optional int32 num_rows = 1;

  // Number of tuples per row in this batch.
  optional int32 num_tuples_per_row = 2;

  // Size of 'tuple_data' in bytes before any compression is applied.
  optional int64 uncompressed_size = 3;

  // The compression codec (if any) used for compressing the row batch.
  optional CompressionType compression_type = 4;
}