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/column.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;
    AlterExpr alter = 3;
    DropTableExpr drop_table = 4;
    FlushTableExpr flush_table = 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;
  repeated uint32 region_ids = 11;
  string engine = 12;
}

message AlterExpr {
  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;
  }
}

message DropTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
}

message FlushTableExpr {
  string catalog_name = 1;
  string schema_name = 2;
  string table_name = 3;
  optional uint32 region_id = 4;
} 

message CreateDatabaseExpr {
  //TODO(hl): maybe rename to schema_name?
  string database_name = 1;
  bool create_if_not_exists = 2;
}

message AddColumns {
  repeated AddColumn add_columns = 1;
}

message DropColumns {
  repeated DropColumn drop_columns = 1;
}

message RenameTable {
  string new_table_name = 1;
}

message AddColumn {
  ColumnDef column_def = 1;
  bool is_key = 2;
}

message DropColumn {
  string name = 1;
}

message TableId {
  uint32 id = 1;
}