import { default as ObjectType } from './ObjectType';
export default class ColumnRef {
    private objectRef;
    columnName: string | null;
    constructor(serverName: string | null, databaseName: string | null, schemaName: string | null, objectName: string | null, columnName: string);
    get serverName(): string | null;
    get databaseName(): string | null;
    get schemaName(): string | null;
    get objectName(): string | null;
    get objectType(): ObjectType | null;
    toBql(): string;
    equals(value: ColumnRef | null): boolean;
}