public void MergeFrom(PlanNode other)
 {
     if (other == null)
     {
         return;
     }
     if (other.Index != 0)
     {
         Index = other.Index;
     }
     if (other.Kind != 0)
     {
         Kind = other.Kind;
     }
     if (other.DisplayName.Length != 0)
     {
         DisplayName = other.DisplayName;
     }
     childLinks_.Add(other.childLinks_);
     if (other.shortRepresentation_ != null)
     {
         if (shortRepresentation_ == null)
         {
             shortRepresentation_ = new global::Google.Cloud.Spanner.V1.PlanNode.Types.ShortRepresentation();
         }
         ShortRepresentation.MergeFrom(other.ShortRepresentation);
     }
     if (other.metadata_ != null)
     {
         if (metadata_ == null)
         {
             metadata_ = new global::Google.Protobuf.WellKnownTypes.Struct();
         }
         Metadata.MergeFrom(other.Metadata);
     }
     if (other.executionStats_ != null)
     {
         if (executionStats_ == null)
         {
             executionStats_ = new global::Google.Protobuf.WellKnownTypes.Struct();
         }
         ExecutionStats.MergeFrom(other.ExecutionStats);
     }
     _unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
 }
        public void MergeFrom(pb::CodedInputStream input)
        {
            uint tag;

            while ((tag = input.ReadTag()) != 0)
            {
                switch (tag)
                {
                default:
                    _unknownFields = pb::UnknownFieldSet.MergeFieldFrom(_unknownFields, input);
                    break;

                case 8: {
                    Index = input.ReadInt32();
                    break;
                }

                case 16: {
                    kind_ = (global::Google.Cloud.Spanner.V1.PlanNode.Types.Kind)input.ReadEnum();
                    break;
                }

                case 26: {
                    DisplayName = input.ReadString();
                    break;
                }

                case 34: {
                    childLinks_.AddEntriesFrom(input, _repeated_childLinks_codec);
                    break;
                }

                case 42: {
                    if (shortRepresentation_ == null)
                    {
                        shortRepresentation_ = new global::Google.Cloud.Spanner.V1.PlanNode.Types.ShortRepresentation();
                    }
                    input.ReadMessage(shortRepresentation_);
                    break;
                }

                case 50: {
                    if (metadata_ == null)
                    {
                        metadata_ = new global::Google.Protobuf.WellKnownTypes.Struct();
                    }
                    input.ReadMessage(metadata_);
                    break;
                }

                case 58: {
                    if (executionStats_ == null)
                    {
                        executionStats_ = new global::Google.Protobuf.WellKnownTypes.Struct();
                    }
                    input.ReadMessage(executionStats_);
                    break;
                }
                }
            }
        }