import { Pool } from 'pg';
import { DatabaseConnectionConfig } from './types';
import { KeyValue } from '../../vision/types';
export declare class Pg {
    protected pool: Pool;
    protected config: DatabaseConnectionConfig;
    protected name: string;
    constructor(name: string, config?: DatabaseConnectionConfig);
    setup(): void;
    connect: (config: DatabaseConnectionConfig) => Pg;
    protected parseDate(val: string): string;
    protected parseDate(val: number): number;
    protected parseDate(val: null): null;
    disconnect: () => Promise<Pg>;
    query(query: string, params?: Array<string | number | string[] | number[]>): Promise<KeyValue[]>;
    queryOne(query: string, params?: Array<string | number>): Promise<KeyValue | null>;
    getName: () => string;
    getConfig: () => DatabaseConnectionConfig;
}