import { WatchedQueryComparator, WatchedQuerySettings } from '@powersync/common';
import { AbstractQueryProcessor, AbstractQueryProcessorOptions, LinkQueryOptions } from './AbstractQueryProcessor.js';
/**
 * @internal
 */
export interface OnChangeQueryProcessorOptions<Data> extends AbstractQueryProcessorOptions<Data, WatchedQuerySettings<Data>> {
    comparator?: WatchedQueryComparator<Data>;
}
/**
 * Uses the PowerSync onChange event to trigger watched queries.
 * Results are emitted on every change of the relevant tables.
 * @internal
 */
export declare class OnChangeQueryProcessor<Data> extends AbstractQueryProcessor<Data, WatchedQuerySettings<Data>> {
    protected options: OnChangeQueryProcessorOptions<Data>;
    constructor(options: OnChangeQueryProcessorOptions<Data>);
    /**
     * @returns If the sets are equal
     */
    protected checkEquality(current: Data, previous: Data): boolean;
    protected linkQuery(options: LinkQueryOptions<Data>): Promise<void>;
}