// Copyright 2023 Greptime Team
//
// Licensed 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 = "proto3";

package greptime.v1;

option java_package = "io.greptime.v1";
option java_outer_classname = "Ddl";
option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1";

import "greptime/v1/common.proto";

// "Data Definition Language" requests, that create, modify or delete the
// database structures but not the data. `DdlRequest` could carry more
// information than plain SQL, for example, the "table_id" in `CreateTableExpr`.
// So create a new DDL expr if you need it.
message DdlRequest {
  oneof expr {
    CreateDatabaseExpr create_database = 1;
    CreateTableExpr create_table = 2;
    AlterTableExpr alter_table = 3;
    DropTableExpr drop_table = 4;
    TruncateTableExpr truncate_table = 7;
    CreateFlowExpr create_flow = 8;
    DropFlowExpr drop_flow = 9;
    CreateViewExpr create_view = 10;
    DropViewExpr drop_view = 11;
    AlterDatabaseExpr alter_database = 12;
  }
}

// Create a flow to run the SQL when new data arrives.
message CreateFlowExpr {
  string catalog_name = 1;
  string flow_name = 2;
  repeated TableName source_table_names = 3;
  TableName sink_table_name = 4;
  bool or_replace = 5;
  bool create_if_not_exists = 6;
  // Expire data older than the given duration seconds.
  ExpireAfter expire_after = 7;
  string comment = 8;
  string sql = 9;
  map<string, string> flow_options = 10;
}

// Drop a flow.
message DropFlowExpr {
  string catalog_name = 1;
  string flow_name = 2;
  FlowId flow_id = 3;
  bool drop_if_exists = 5;
}

// Create a view
message CreateViewExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string view_name = 3;
  bytes logical_plan = 4;
  bool create_if_not_exists = 5;
  bool or_replace = 6;
  repeated TableName table_names = 7;
  repeated string columns = 8;
  repeated string plan_columns = 9;
  string definition = 10;
}

// Drop a view
message DropViewExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string view_name = 3;
  TableId view_id = 4;
  bool drop_if_exists = 5;
}

message CreateTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
  string desc = 4;
  repeated ColumnDef column_defs = 5;
  string time_index = 6;
  repeated string primary_keys = 7;
  bool create_if_not_exists = 8;
  map<string, string> table_options = 9;
  TableId table_id = 10;
  string engine = 12;
}

message AlterTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
  oneof kind {
    AddColumns add_columns = 4;
    DropColumns drop_columns = 5;
    RenameTable rename_table = 6;
    ModifyColumnTypes modify_column_types = 7;
    SetTableOptions set_table_options = 8;
    UnsetTableOptions unset_table_options = 11;
    SetIndex set_index = 12;
    UnsetIndex unset_index = 13;
  }
}

message SetIndex {
  oneof options {
    SetFulltext fulltext = 1;
    SetInverted inverted = 2;
    SetSkipping skipping = 3;
  }
}

message UnsetIndex {
  oneof options {
    UnsetFulltext fulltext = 1;
    UnsetInverted inverted = 2;
    UnsetSkipping skipping = 3;
  }
}

message DropTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
  TableId table_id = 4;
  bool drop_if_exists = 5;
}

message CreateDatabaseExpr {
  string catalog_name = 1;
  string schema_name = 2;
  bool create_if_not_exists = 3;
  map<string, string> options = 4;
}

message TruncateTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
  TableId table_id = 4;
}

message DropDatabaseExpr {
  string catalog_name = 1;
  string schema_name = 2;
  bool drop_if_exists = 3;
}

message AddColumns {
  repeated AddColumn add_columns = 1;
}

message DropColumns { repeated DropColumn drop_columns = 1; }

message ModifyColumnTypes { repeated ModifyColumnType modify_column_types = 1; }

message RenameTable { string new_table_name = 1; }

message AddColumn {
  ColumnDef column_def = 1;
  AddColumnLocation location = 3;
  bool add_if_not_exists = 4;
}

message ModifyColumnType {
  string column_name = 1;
  ColumnDataType target_type = 2;
  ColumnDataTypeExtension target_type_extension = 3;
}

message Option {
  string key = 1;
  string value = 2;
}

message SetTableOptions {
    repeated Option table_options = 1;
}

message UnsetTableOptions {
    repeated string keys = 1;
}

message DropColumn { string name = 1; }

message TableId { uint32 id = 1; }

message FlowId { uint32 id = 1; }

message ColumnDef {
  string name = 1;
  ColumnDataType data_type = 2;
  bool is_nullable = 3;
  bytes default_constraint = 4;
  SemanticType semantic_type = 5;
  string comment = 6;

  // Extension for ColumnDataType.
  ColumnDataTypeExtension datatype_extension = 7;

  // Additional column options.
  ColumnOptions options = 8;
}

message AddColumnLocation {
  enum LocationType {
    FIRST = 0;
    AFTER = 1;
  }
  LocationType location_type = 1;
  string after_column_name = 2;
}

enum Analyzer {
    ENGLISH = 0;
    CHINESE = 1;
}

enum FulltextBackend {
    TANTIVY = 0;
    BLOOM = 1;
}

message SetFulltext {
    string column_name = 1;
    bool enable = 2;
    Analyzer analyzer = 3;
    bool case_sensitive = 4;
    FulltextBackend backend = 5;
}

message UnsetFulltext {
    string column_name = 1;
}

message SetInverted {
    string column_name = 1;
}

message UnsetInverted {
    string column_name = 1;
}

enum SkippingIndexType {
    BLOOM_FILTER = 0;
}

message SetSkipping {
    string column_name = 1;
    bool enable = 2;
    uint64 granularity = 3;
    SkippingIndexType skipping_index_type = 4;
}

message UnsetSkipping {
    string column_name = 1;
}
message AlterDatabaseExpr {
    string catalog_name = 1;
    string schema_name = 2;
    oneof kind {
        SetDatabaseOptions set_database_options = 3;
        UnsetDatabaseOptions unset_database_options = 4;
    }
}

message SetDatabaseOptions {
    repeated Option set_database_options = 1;
}

message UnsetDatabaseOptions {
    repeated string keys = 1;
}
