import { WatchCompatibleQuery, WatchedQuery, WatchedQueryOptions } from '../WatchedQuery.js';
import { AbstractQueryProcessor, AbstractQueryProcessorOptions, LinkQueryOptions } from './AbstractQueryProcessor.js';
import { WatchedQueryComparator } from './comparators.js';
/**
 * Settings for {@link WatchedQuery} instances created via {@link Query#watch}.
 */
export interface WatchedQuerySettings<DataType> extends WatchedQueryOptions {
    query: WatchCompatibleQuery<DataType>;
}
/**
 * {@link WatchedQuery} returned from {@link Query#watch}.
 */
export type StandardWatchedQuery<DataType> = WatchedQuery<DataType, WatchedQuerySettings<DataType>>;
/**
 * @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>;
}