import { PlywoodValue } from '../datatypes';
import { SQLDialect } from '../dialect/baseDialect';
import { ChainableUnaryExpression, ExpressionJS, ExpressionValue } from './baseExpression';
import { Aggregate } from './mixins/aggregate';
export declare class MaxExpression extends ChainableUnaryExpression implements Aggregate {
    static op: string;
    static fromJS(parameters: ExpressionJS): MaxExpression;
    constructor(parameters: ExpressionValue);
    protected _calcChainableUnaryHelper(operandValue: any, _expressionValue: any): PlywoodValue;
    protected _getSQLChainableUnaryHelper(dialect: SQLDialect, operandSQL: string, expressionSQL: string): string;
}
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