import { MongoQueryInfo } from './graphql-to-mongo';
import { Db } from 'mongodb';
/**
 * The result of executing a GraphQL query against MongoDB.
 */
export interface GraphQLExecutionResult {
    /**
     * The name of the collection that the query is for.
     */
    collection: string;
    /**
     * The results of the query. Will be a single result for findOne and an array for find.
     */
    results: any[] | any;
    /**
     * Any error that occurred as part of executing the query.
     */
    error: Error;
}
/**
 * Executes queries against multiple collections and returns all of their results.
 *
 * @param connection The mongodb connection.
 * @param queryInfos An array of {MongoQueryInfo} to execute.
 * @return {Promise<GraphQLExecutionResult[]>} The results of running all of the queries.
 */
export declare function findMultiple(connection: Db, queryInfos: MongoQueryInfo[]): Promise<GraphQLExecutionResult[]>;
/**
 * Executes a single findOne query for the passed {MongoQueryInfo}.
 * @param connection The mongodb connection.
 * @param queryInfo The query {MongoQueryInfo} to execute.
 * @return {Promise<GraphQLExecutionResult>} The results of running the query.
 */
export declare function findOne(connection: Db, queryInfo: MongoQueryInfo): Promise<GraphQLExecutionResult>;
export declare function findAll(connection: Db, queryInfo: MongoQueryInfo): Promise<GraphQLExecutionResult>;