import IClient = require('./IClient');
import IQuery = require('./IQuery');
import QueryCallback = require('./QueryCallback');
export = PostgreClient;
declare class PostgreClient implements IClient {
    private client;
    private lastConnection;
    private connectionsLimit;
    private connections;
    connectionParameters: any;
    constructor(client: IClient);
    connect(callback?: (e: Error, client?: IClient) => void): void;
    end(): void;
    on(event: string, callback: (data?: any) => void): PostgreClient;
    removeListener(event: string, callback: (data?: any) => void): PostgreClient;
    query(sql: string, params?: any[] | QueryCallback, callback?: QueryCallback): IQuery;
    private addConnection();
    private getConnection();
    private removeConnection(connection);
}