// 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 quickstep.serialization;

import "storage/StorageBlockLayout.proto";
import "types/Type.proto";
import "types/TypedValue.proto";

message CatalogAttribute {
  required string name = 1;
  required Type type = 2;
  optional string display_name = 3;
}

// TODO(zuyu): Move PartitionScheme to a dedicate proto file.
message PartitionSchemeHeader {
  // Next tag: 3.
  enum PartitionType {
    HASH = 0;
    RANDOM = 2;
    RANGE = 1;
  }

  required PartitionType partition_type = 1;

  required uint64 num_partitions = 2;
  repeated uint32 partition_attribute_ids = 3;

  // The convention for extension numbering is that extensions for a particular
  // PartitionType should begin from (partition_type + 1) * 16.
  extensions 16 to max;
}

message PartitionValues {
  repeated TypedValue partition_values = 1;
}

message RangePartitionSchemeHeader {
  extend PartitionSchemeHeader {
    // All required.
    repeated Type partition_attr_types = 32;
    repeated PartitionValues partition_range_boundaries = 33;
  }
}

message Partition {
  repeated fixed64 blocks = 1 [packed=true];
}

message PartitionScheme {
  required PartitionSchemeHeader header = 1;
  repeated Partition partitions = 2;
}

message NUMAPlacementScheme {
  required uint32 num_numa_nodes = 1;

  message BlockToNUMANodeEntry {
    required fixed64 block_id = 1;
    required int32 numa_node = 2;
  }
  repeated BlockToNUMANodeEntry block_to_numa_node_map = 2;
}

message IndexScheme {
  message IndexEntry {
    required string index_name = 1;
    required IndexSubBlockDescription index_description = 2;
  }
  repeated IndexEntry index_entries = 1;
}

message CatalogRelationStatistics {
  optional bool is_exact = 1;
  optional TypedValue num_tuples = 2;

  message ColumnStats {
    required int32 attr_id = 1;
    optional TypedValue num_distinct_values = 2;
    optional TypedValue min_value = 3;
    optional TypedValue max_value = 4;
  }
  repeated ColumnStats column_stats = 3;
}

message CatalogRelationSchema {
  required int32 relation_id = 1;
  required string name = 2;
  required bool temporary = 3;

  repeated CatalogAttribute attributes = 4;

  extensions 16 to max;
}

message CatalogRelation {
  extend CatalogRelationSchema {
    // Required.
    optional StorageBlockLayoutDescription default_layout = 16;

    repeated fixed64 blocks = 17 [packed=true];
    optional IndexScheme index_scheme = 18;
    optional PartitionScheme partition_scheme = 19;
    optional NUMAPlacementScheme placement_scheme = 20;
    optional CatalogRelationStatistics statistics = 21;
  }
}

message CatalogDatabase {
  required string name = 1;
  repeated CatalogRelationSchema relations = 2;
  repeated int32 null_relations = 3;
}

message Catalog {
  repeated CatalogDatabase databases = 1;
}