import { IObjectType, GenericType } from "../../Common/Type";
import { ProjectionEntityExpression } from "./ProjectionEntityExpression";
import { SelectExpression } from "./SelectExpression";
import { IExpression } from "../../ExpressionBuilder/Expression/IExpression";
export declare class UnionExpression<T> extends ProjectionEntityExpression {
    readonly subSelect: SelectExpression<T>;
    readonly subSelect2: SelectExpression;
    isUnionAll: IExpression<boolean>;
    readonly entityTypes: IObjectType[];
    constructor(subSelect: SelectExpression<T>, subSelect2: SelectExpression, isUnionAll: IExpression<boolean>, type?: GenericType<T>);
    toString(): string;
    clone(replaceMap?: Map<IExpression, IExpression>): UnionExpression<any>;
    hashCode(): number;
}