import { QueryBuilder as QueryBuilderInterface } from "../../dist/types/QueryBuilder.js";
import * as mysql from "mysql2/promise";
declare class QueryBuilder implements QueryBuilderInterface {
    private queryType;
    private fields;
    protected table: string;
    private conditions;
    private data;
    connection?: mysql.Connection;
    constructor();
    private __setupConnection;
    select(fields: string[]): this;
    where(field: string | Function, operator?: string, value?: any): this;
    orWhere(field: string | Function, operator?: string, value?: any): this;
    insert(table: string, data: Record<string, any>): this;
    update(table: string, data: Record<string, any>): this;
    deleteFrom(table: string): this;
    get(columns?: string[]): Promise<any>;
    setTable(table: string): this;
    first(): Promise<any>;
    private build;
    execute(): Promise<mysql.RowDataPacket[]>;
    tableExist(table: string): Promise<boolean>;
    private buildSelect;
    private buildInsert;
    private buildUpdate;
    private buildDelete;
}
export default QueryBuilder;