export declare type ForeignKey = {
    table: string;
    column: string;
    foreign_key_table: string;
    foreign_key_column: string;
    foreign_key_schema?: string;
    constraint_name: null | string;
    on_update: null | 'NO ACTION' | 'RESTRICT' | 'CASCADE' | 'SET NULL' | 'SET DEFAULT';
    on_delete: null | 'NO ACTION' | 'RESTRICT' | 'CASCADE' | 'SET NULL' | 'SET DEFAULT';
};