import { IInsertQuery, ISelectQuery, IUpdateQuery, API } from "@/common";
import { LogHelper } from "@/worker/utils";
import { DbMeta } from "../model";
export declare class QueryHelper {
    db: DbMeta;
    constructor(dbSchema: DbMeta);
    validate(api: API, query: IInsertQuery | ISelectQuery | IUpdateQuery): LogHelper;
    private getTable_;
    isInsertQryValid(query: IInsertQuery): {
        table: import("../model").TableMeta;
        log: LogHelper;
    };
    private checkUpdate;
    private checkSelect;
    private checkForNullInWhere_;
    private addGreatAndLessToNotOp_;
    private checkInsertQuery;
}