import { ConnectionConfig, QueryResult } from '../types/index.js';
export declare class SqlClient {
    private config;
    private connected;
    constructor(url: string);
    /**
     * Test connection to the Supabase Lite instance
     */
    connect(): Promise<void>;
    /**
     * Execute a SQL query
     */
    executeQuery(sql: string): Promise<QueryResult>;
    /**
     * Test if the connection is still active
     */
    ping(): Promise<boolean>;
    /**
     * Get connection information
     */
    getConnectionInfo(): ConnectionConfig;
    /**
     * Check if connected
     */
    isConnected(): boolean;
    /**
     * Close the connection (cleanup)
     */
    disconnect(): void;
}
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