import * as pg from 'pg';
import { IDbConstructorOptions, IPostgresConfig } from '../interfaces';
import { DbBase } from './DbBase';
export declare class DbPostgres extends DbBase {
    pool: pg.Pool | null;
    cfg: IPostgresConfig;
    constructor(options: IDbConstructorOptions);
    getPool(): Promise<pg.Pool>;
    close(): Promise<boolean>;
    query(strSQL: string): Promise<pg.QueryResult<any>>;
    _getColumnsNames(): Promise<string[]>;
    limitIt(strSQL: string, limit: number): string;
}
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