/**
 * @pwngh/economy-lab
 *
 * Copyright (c) Preston Neal
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.md file in the root directory of this source tree.
 *
 * @license MIT
 */
interface MysqlConnection {
    query(sql: string, params?: ReadonlyArray<unknown>): Promise<[unknown, unknown]>;
    release(): void;
}
/**
 * The pool seam `mysqlStore` rides, declared structurally: the seam is a shape, not a name, so
 * `mysqlStore` accepts any pool with these three members — the `mysql2` pool `createMysqlPool`
 * builds, or the `mariadb` pool {@link createMariadbPool} builds here. `query` resolves a tuple
 * whose first slot holds rows for a SELECT or an affected-rows header for a write.
 */
export interface MysqlPool {
    query(sql: string, params?: ReadonlyArray<unknown>): Promise<[unknown, unknown]>;
    getConnection(): Promise<MysqlConnection>;
    end(): Promise<void>;
}
/**
 * Create a {@link MysqlPool} from a connection URL using the `mariadb` driver — the
 * pipelining-capable opt-in behind the same seam `createMysqlPool` fills with `mysql2`. Same
 * store, same schema, same SQL: hand the pool to `mysqlStore` and every statement above the seam
 * is identical. The difference is the wire: mysql2's command queue holds one command in flight
 * per connection, while mariadb writes the next command before the previous response returns.
 *
 * Matches the mysql2 pool's configuration: big integer and decimal columns come back as exact
 * strings (the engine converts them to bigint), and the connection collation is pinned to the
 * schema's utf8mb4 default. `connectionLimit` caps the pool exactly as on `createMysqlPool` and
 * defaults to 10; each in-flight transaction holds one connection, so size it to at least the
 * number of concurrent submits. The URL must carry no query parameters — this factory maps the
 * URL to driver config by hand and throws rather than silently drop options mysql2 would honor.
 *
 * @example
 * import { createMariadbPool } from '@pwngh/economy-lab/engines/mysql-mariadb';
 * import { mysqlStore } from '@pwngh/economy-lab/engines/mysql';
 *
 * const pool = await createMariadbPool('mysql://econ:secret@127.0.0.1:3306/economy', {
 *   connectionLimit: 32,
 * });
 * const store = mysqlStore({ pool, schema: 'assert' });
 */
export declare function createMariadbPool(url: string, options?: {
    connectionLimit?: number;
}): Promise<MysqlPool>;
export {};