import type { Dialect, ExtraOptions, Querier, QuerierPool } from '../type/index.js';
export declare abstract class AbstractQuerierPool<Q extends Querier> implements QuerierPool<Q> {
    readonly dialect: Dialect;
    readonly extra?: ExtraOptions | undefined;
    constructor(dialect: Dialect, extra?: ExtraOptions | undefined);
    /**
     * get a querier from the pool.
     */
    abstract getQuerier(): Promise<Q>;
    /**
     * get a querier from the pool and run the given callback inside a transaction.
     */
    transaction<T>(callback: (querier: Q) => Promise<T>): Promise<T>;
    /**
     * get a querier from the pool, run the given callback, and release the querier.
     */
    withQuerier<T>(callback: (querier: Q) => Promise<T>): Promise<T>;
    /**
     * end the pool.
     */
    abstract end(): Promise<void>;
}
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