import { AthenaClientConfig } from './AthenaClientConfig.js';
import { AthenaClient as AwsAthenaClient } from '@aws-sdk/client-athena';
import { Statistics } from './Statistics.js';
export interface QueryConfig {
    readonly id?: string;
    readonly parameters?: Record<string, unknown>;
    readonly cacheInMinutes?: number;
    readonly stats?: boolean;
}
export interface QueryWithResultsInS3Config extends QueryConfig {
    s3LinkExpirationInSeconds?: number;
}
export declare class AthenaNodeClient {
    private readonly _client;
    private readonly _config;
    private _queue;
    constructor(client: AwsAthenaClient, config: AthenaClientConfig);
    executeQuery<T extends object>(sql: string, config?: QueryConfig): Promise<{
        id: string;
        results: T[];
        statistics?: Statistics;
    }>;
    /**
     * Execute query in Athena and get S3 URL with CSV file
     */
    executeQueryAndGetS3Key(sql: string, config?: QueryConfig): Promise<{
        id: string;
        bucket: string;
        key: string;
        statistics?: Statistics;
    }>;
    executeQueryAndGetDownloadSignedUrl(sql: string, config?: QueryWithResultsInS3Config): Promise<{
        id: string;
        url: string;
        statistics?: Statistics;
    }>;
    /**
     * Cancel a AWS Athena query
     *
     * @param {string} id Execution query ID
     *
     * @returns {Promise<void>}
     *
     * @memberof AthenaNodeClient
     */
    cancelQuery(id: string): Promise<void>;
    private executeQueryCommon;
    /**
     * Starts query execution and gets an ID for the operation
     *
     * @private
     * @param {Query} query - Athena request params
     * @returns {Promise<string>} - query execution id
     * @memberof AthenaNodeClient
     */
    private startQueryExecution;
    /**
     * Processes query results and parses them
     *
     * @private
     * @template T
     *
     * @param {Query<T>} query
     * @param {string} nextToken
     *
     * @returns {Promise<T[]>} - parsed query result rows
     * @memberof AthenaNodeClient
     */
    private getQueryResults;
    /**
     * Get statistics from a query execution
     *
     * @private
     * @template T
     *
     *
     * @returns {Promise<T[]>} - parsed query result rows
     * @memberof AthenaNodeClient
     * @param {string} executionId
     */
    private getQueryStatistics;
    private parseRow;
    private parseRows;
    private setColumnParsers;
    /**
     * Checks the query execution status until the query sends SUCCEEDED signal
     *
     * @private
     * @param {Query} query - the query
     * @returns {Promise<void>} - promise that will resolve once the operation has finished
     * @memberof AthenaNodeClient
     */
    private waitUntilSucceedQuery;
}