syntax = "proto3";

import "status.proto";

package milvus.grpc;

/**
 * @brief Table Name
 */
message TableName {
    Status status = 1;
    string table_name = 2;
}

/**
 * @brief Table Schema
 */
message TableSchema {
    TableName table_name = 1;
    int32 index_type = 2;
    int64 dimension = 3;
    bool store_raw_vector = 4;
}

/**
 * @brief Range Schema
 */
message Range {
    string start_value = 1;
    string end_value = 2;
}

/**
 * @brief Record inserted
 */
message RowRecord {
    repeated float vector_data = 1;             //binary in thrift
}

/**
 * @brief params to be inserted
 */
message InsertParam {
    string table_name = 1;
    repeated RowRecord row_record_array = 2;
}

/**
 * @brief Vector ids
 */
message VectorIds {
    Status status = 1;
    repeated int64 vector_id_array = 2;
}

/**
 * @brief params for searching vector
 */
message SearchParam {
    string table_name = 1;
    repeated RowRecord query_record_array = 2;
    repeated Range query_range_array = 3;
    int64 topk = 4;
}

/**
 * @brief params for searching vector in files
 */
message SearchInFilesParam {
    repeated string file_id_array = 1;
    SearchParam search_param = 2;
}

/**
 * @brief Query result params
 */
message QueryResult {
    int64 id = 1;
    double distance = 2;
}

/**
 * @brief TopK query result
 */
message TopKQueryResult {
    Status status = 1;
    repeated QueryResult query_result_arrays = 2;
}

/**
 * @brief Server String Reply
 */
message StringReply {
    Status status = 1;
    string string_reply = 2;
}

/**
 * @brief Server bool Reply
 */
message BoolReply {
    Status status = 1;
    bool bool_reply = 2;
}

/**
 * @brief Return table row count
 */
message TableRowCount {
    Status status = 1;
    int64 table_row_count = 2;
}

/**
 * @brief Give Server Command
 */
message Command {
    string cmd = 1;
}

/**
 * @brief Index
 */
message Index {
    int32 index_type = 1;
    int64 nlist = 2;
    int32 index_file_size = 3;
}

/**
 * @brief Index params
 */
message IndexParam {
    TableName table_name = 1;
    Index index = 2;
}

/**
 * @brief table name and range for DeleteByRange
 */
message DeleteByRangeParam {
    Range range = 1;
    string table_name = 2;
}

service MilvusService {
    /**
     * @brief Create table method
     *
     * This method is used to create table
     *
     * @param param, use to provide table information to be created.
     *
     */
    rpc CreateTable(TableSchema) returns (Status){}

    /**
     * @brief Test table existence method
     *
     * This method is used to test table existence.
     *
     * @param table_name, table name is going to be tested.
     *
     */
    rpc HasTable(TableName) returns (BoolReply) {}

    /**
     * @brief Delete table method
     *
     * This method is used to delete table.
     *
     * @param table_name, table name is going to be deleted.
     *
     */
    rpc DropTable(TableName) returns (Status) {}

    /**
     * @brief Build index by table method
     *
     * This method is used to build index by table in sync mode.
     *
     * @param table_name, table is going to be built index.
     *
     */
    rpc CreateIndex(IndexParam) returns (Status) {}

    /**
     * @brief Add vector array to table
     *
     * This method is used to add vector array to table.
     *
     * @param table_name, table_name is inserted.
     * @param record_array, vector array is inserted.
     *
     * @return vector id array
     */
    rpc Insert(InsertParam) returns (VectorIds) {}

    /**
     * @brief Query vector
     *
     * This method is used to query vector in table.
     *
     * @param table_name, table_name is queried.
     * @param query_record_array, all vector are going to be queried.
     * @param query_range_array, optional ranges for conditional search. If not specified, search whole table
     * @param topk, how many similarity vectors will be searched.
     *
     * @return query result array.
     */
    rpc Search(SearchParam) returns (stream TopKQueryResult) {}

    /**
     * @brief Internal use query interface
     *
     * This method is used to query vector in specified files.
     *
     * @param file_id_array, specified files id array, queried.
     * @param query_record_array, all vector are going to be queried.
     * @param query_range_array, optional ranges for conditional search. If not specified, search whole table
     * @param topk, how many similarity vectors will be searched.
     *
     * @return query result array.
     */
    rpc SearchInFiles(SearchInFilesParam) returns (stream TopKQueryResult) {}

    /**
     * @brief Get table schema
     *
     * This method is used to get table schema.
     *
     * @param table_name, target table name.
     *
     * @return table schema
     */
    rpc DescribeTable(TableName) returns (TableSchema) {}

    /**
     * @brief Get table schema
     *
     * This method is used to get table schema.
     *
     * @param table_name, target table name.
     *
     * @return table schema
     */
    rpc CountTable(TableName) returns (TableRowCount) {}

    /**
     * @brief List all tables in database
     *
     * This method is used to list all tables.
     *
     *
     * @return table names.
     */
    rpc ShowTables(Command) returns (stream TableName) {}

    /**
     * @brief Give the server status
     *
     * This method is used to give the server status.
     *
     * @return Server status.
     */
    rpc Cmd(Command) returns (StringReply) {}

     /**
     * @brief delete table by range
     *
     * This method is used to delete vector by range
     *
     * @return rpc status.
     */
     rpc DeleteByRange(DeleteByRangeParam) returns (Status) {}

     /**
      * @brief preload table
      *
      * This method is used to preload table
      *
      * @return Status.
      */
     rpc PreloadTable(TableName) returns (Status) {}

     /**
      * @brief describe index
      *
      * This method is used to describe index
      *
      * @return Status.
      */
     rpc DescribeIndex(TableName) returns (IndexParam) {}

     /**
      * @brief drop index
      *
      * This method is used to drop index
      *
      * @return Status.
      */
     rpc DropIndex(TableName) returns (Status) {}

}