import type { Client, Pool, PoolClient } from 'pg';
import { AsyncDatabase, type TransactionOptions } from '../core/Database.js';
import type { AsyncDriver, AsyncStatement, BatchedQuery, PrepareOptions } from '../core/Driver.js';
type Queryable = Client | Pool | PoolClient;
declare class PreparedStatement implements AsyncStatement {
    private client;
    private sql;
    private name?;
    constructor(client: Queryable, sql: string, name?: string | undefined);
    all(params: Array<unknown>): Promise<Array<object>>;
    run(params: Array<unknown>): Promise<void>;
    get(params: Array<unknown>): Promise<object>;
    values(params: Array<unknown>): Promise<Array<Array<unknown>>>;
    free(): void;
}
export declare class PgDriver implements AsyncDriver {
    private client;
    private depth;
    parsesJson: boolean;
    supportsTransactions: boolean;
    constructor(client: Queryable, depth?: number);
    exec(query: string): Promise<void>;
    prepare(sql: string, options?: PrepareOptions): PreparedStatement;
    close(): Promise<void>;
    batch(queries: Array<BatchedQuery>): Promise<Array<Array<unknown>>>;
    transaction<T>(run: (inner: AsyncDriver) => Promise<T>, options: TransactionOptions['postgres']): Promise<T>;
}
export declare function connect(client: Queryable): AsyncDatabase<'postgres'>;
export {};