/*!
 * This source file is part of the Gel open source project.
 *
 * Copyright 2020-present MagicStack Inc. and the Gel authors.
 *
 * 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.
 */
export type ProtocolVersion = [number, number];
export declare enum OutputFormat {
    BINARY,
    JSON,
    NONE
}
export declare enum Cardinality {
    NO_RESULT,
    AT_MOST_ONE,
    ONE,
    MANY,
    AT_LEAST_ONE
}
export declare enum Language {
    EDGEQL,
    SQL
}
export type QueryArgs = Record<string, unknown> | unknown[] | null;
export type SQLQueryArgs = unknown[] | null;
export interface Executor {
    execute(query: string, args?: QueryArgs): Promise<void>;
    executeSQL(query: string, args?: SQLQueryArgs): Promise<void>;
    query<T = unknown>(query: string, args?: QueryArgs): Promise<T[]>;
    querySQL<T = unknown>(query: string, args?: SQLQueryArgs): Promise<T[]>;
    queryJSON(query: string, args?: QueryArgs): Promise<string>;
    querySingle<T = unknown>(query: string, args?: QueryArgs): Promise<T | null>;
    querySingleJSON(query: string, args?: QueryArgs): Promise<string>;
    queryRequired<T = unknown>(query: string, args?: QueryArgs): Promise<[T, ...T[]]>;
    queryRequiredJSON(query: string, args?: QueryArgs): Promise<string>;
    queryRequiredSingle<T = unknown>(query: string, args?: QueryArgs): Promise<T>;
    queryRequiredSingleJSON(query: string, args?: QueryArgs): Promise<string>;
}
interface UserCodec {
    encode(value: any): any;
    decode(value: any): any;
}
export type UserCodecs = {
    [typeName: string]: UserCodec;
};
export interface KnownServerSettings {
    suggested_pool_concurrency?: number;
    system_config?: any;
}
export type ServerSettings = KnownServerSettings & Record<string, Uint8Array>;
export interface QueryOptions {
    implicitLimit?: bigint;
    injectTypenames?: boolean;
    injectTypeids?: boolean;
    injectObjectids?: boolean;
}
export interface ClientHandshakeOptions {
    user: string;
    database: string;
    secret_key?: string;
}
export {};