import { PlywoodValue } from '../datatypes';
import { SQLDialect } from '../dialect/baseDialect';
import { DatasetFullType } from '../types';
import { ChainableUnaryExpression, Expression, ExpressionJS, ExpressionValue } from './baseExpression';
export declare class JoinExpression extends ChainableUnaryExpression {
    static op: string;
    static fromJS(parameters: ExpressionJS): JoinExpression;
    constructor(parameters: ExpressionValue);
    updateTypeContext(typeContext: DatasetFullType, expressionTypeContext: DatasetFullType): DatasetFullType;
    pushIntoExternal(): Expression | null;
    protected _calcChainableUnaryHelper(operandValue: any, expressionValue: any): PlywoodValue;
    protected _getSQLChainableUnaryHelper(_dialect: SQLDialect, _operandSQL: string, _expressionSQL: string): string;
}
//# sourceMappingURL=joinExpression.d.ts.map