import type { ExtraOptions, Querier } from './querier.js';
/**
 * querier pool.
 */
export type QuerierPool<Q extends Querier = Querier> = {
    /**
     * extra options
     */
    readonly extra?: ExtraOptions;
    /**
     * get a querier from the pool.
     */
    getQuerier: () => Promise<Q>;
    /**
     * end the pool.
     */
    end(): Promise<void>;
};