import { O_COLUMN_DEFINITION, ColumnOptionsInterface } from '../../../../typings';
import { ColumnOptionsModelInterface } from './typings';
/**
 * Options of a table column.
 */
export declare class ColumnOptions implements ColumnOptionsModelInterface {
    unsigned?: boolean;
    zerofill?: boolean;
    charset?: string;
    collation?: string;
    nullable?: boolean;
    default?: string | number | boolean;
    autoincrement?: boolean;
    unique?: boolean;
    primary?: boolean;
    comment?: string;
    invisibleWithSystemVersioning?: boolean;
    invisibleWithoutSystemVersioning?: boolean;
    invisible?: boolean;
    format?: string;
    storage?: string;
    onUpdate?: string;
    /**
     * Creates column options instance from an array of definitions.
     *
     * @param json JSON format parsed from SQL.
     */
    static fromArray(json: O_COLUMN_DEFINITION[]): ColumnOptions;
    /**
     * JSON casting of this object calls this method.
     */
    toJSON(): ColumnOptionsInterface;
    /**
     * Merge this option instance with another one.
     * Common properties of this instance are overwritten.
     *
     * @param options JSON format parsed from SQL.
     */
    mergeWith(options: ColumnOptions): void;
    /**
     * Create a deep clone of this model.
     */
    clone(): ColumnOptions;
}