import { Runnable } from '../../databases/database_context';
import { SelectStatement } from '../../statements/select_statement';
import { GroupSelectStatement } from '../../statements/group_select_statement';
export declare class SelectGuaranteedSingleRow<T> implements Runnable<T> {
    statement: SelectStatement | GroupSelectStatement;
    constructor(statement: SelectStatement | GroupSelectStatement);
    readonly client = "guarantee-single-row";
}
export declare function aggregateTables<A>(statement: SelectStatement, aggregation: Function): SelectGuaranteedSingleRow<A>;