import { CSN, EventContext, LinkedModel } from "cds-internal-tool";
import "colors";
import { ConnectionWithPool, MysqlDatabaseOptions } from "./types";
import { lazy } from "./utils";
/**
 * MySQL Database Adapter for SAP CAP Framework
 *
 */
export declare class MySQLDatabaseService extends lazy.BaseService {
    constructor(...args: any[]);
    options: MysqlDatabaseOptions;
    model: LinkedModel;
    private _queries;
    private _execute;
    private _read;
    private _insert;
    private _update;
    private _delete;
    private _run;
    private _logger;
    private _pools;
    /**
     * initialize function
     */
    init(): Promise<void>;
    private _registerCSVHandlers;
    private _registerEagerDeploy;
    private _initializeTenant;
    /**
     * get connection pool for tenant
     *
     * connection pool is independent for tenant
     *
     * @param tenant
     */
    private _getPool;
    /**
     * acquire connection from pool
     *
     * @override
     * @param tenant_id tenant id
     */
    acquire(tenant_id: string): Promise<ConnectionWithPool>;
    acquire(context: EventContext): Promise<ConnectionWithPool>;
    /**
     * release connection to pool
     *
     * @param conn
     * @override
     */
    release(conn: ConnectionWithPool): Promise<void>;
    /**
     * disconnect from database, free all connections of all tenants
     *
     * @param tenant optional tenant id, if with `*`, close all pools
     */
    disconnect(tenant?: "*" | string): Promise<void>;
    /**
     * implement deployment service
     *
     * @internal
     * @param ds
     * @returns
     */
    private _implDeploymentService;
    private _implExtensibilityService;
    /**
     * deploy (migrate) schema to (tenant) database
     *
     * @param model plain CSN object
     * @param options deployment options
     * @returns
     */
    deploy(model: CSN, options?: {
        tenant: string;
    }): Promise<void>;
}