import { IDBClient } from "../interface/pgInterface";
import { Pair } from "../utils/utils";
export declare class PGClient implements IDBClient {
    private pool;
    constructor(host: string, userName: string, password: string | undefined, port: number, database: string, rejectUnauthorized?: boolean);
    static defaultConfig(): PGClient;
    private mapData;
    fetchAllUsingTwoFields<R, T>(query: string, field1: string, field2: string, parameters?: any[]): Promise<Pair<R, T>[]>;
    fetchAll<R>(query: string, obj: R, parameters?: any[]): Promise<R[]>;
    fetch<R>(query: string, obj: R, parameters?: any[]): Promise<R>;
    fetchAllUsingField<R>(query: string, field: string, parameters?: any[]): Promise<R[]>;
    updateRow(query: string, parameters?: any[]): Promise<any>;
}