import { DatabaseClient } from './IDatabaseClient';
export declare class PostgreSQLClient implements DatabaseClient {
    private connectionString;
    private client;
    constructor(connectionString: string);
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    find(table: string, query: object): Promise<any[]>;
    insert(table: string, data: object): Promise<any>;
    update(table: string, query: object, update: object): Promise<any>;
    delete(table: string, query: object): Promise<any>;
}