export default PuddySqlEngine;
declare class PuddySqlEngine extends EventEmitter<[never]> {
    constructor();
    /**
     * Checks whether the SQL engine identifier is empty.
     *
     * Returns `true` if the SQL engine is either `null`, `undefined`, or an empty string.
     *
     * @returns {boolean} Whether the SQL engine is unset or empty.
     */
    isSqlEngineEmpty(): boolean;
    /**
     * Returns the current SQL engine identifier used by this instance.
     *
     * Throws an error if the engine has not been defined.
     *
     * @returns {string} The name of the current SQL engine.
     * @throws {Error} If the SQL engine is not defined.
     */
    getSqlEngine(): string;
    /**
     * Sets the SQL engine identifier for this instance.
     *
     * This can only be set once, and only with a valid string.
     * Subsequent attempts or invalid types will throw an error.
     *
     * @param {string} engine - The SQL engine name to set (e.g., 'sqlite3' or 'postgre').
     * @throws {Error} If the SQL engine is already set or if the input is not a string.
     */
    setSqlEngine(engine: string): void;
    /**
     * Checks if the given error message indicates a connection error based on the SQL engine in use.
     *
     * This method evaluates if the provided error message contains any known connection error codes
     * for the current SQL engine (PostgreSQL or SQLite3).
     *
     * @param {Error} err - The error message to check.
     * @returns {boolean} True if the error message matches any known connection error codes; otherwise, false.
     */
    isConnectionError(err: Error): boolean;
    /**
     * Executes a query to get all rows from a database table.
     * @function
     * @async
     * @param {string} query - The SQL query to execute.
     * @param {any[*]} [params] - The parameters to bind to the query.
     * @param {string} [debugName] - Optional label or context name for the debug log.
     * @returns {Promise<any[*]>} A promise that resolves to an array of rows.
     * @throws {Error} Throws an error if the query fails.
     */
    all: (query: string, params?: any[any], debugName?: string) => Promise<any[any]>;
    /**
     * Executes a query to get a single row from a database table.
     * @function
     * @async
     * @param {string} query - The SQL query to execute.
     * @param {any[*]} [params] - The parameters to bind to the query.
     * @param {string} [debugName] - Optional label or context name for the debug log.
     * @returns {Promise<Record<any, any>|null>} A promise that resolves to a single row object.
     * @throws {Error} Throws an error if the query fails.
     */
    get: (query: string, params?: any[any], debugName?: string) => Promise<Record<any, any> | null>;
    /**
     * Executes an SQL statement to modify the database (e.g., INSERT, UPDATE).
     * @function
     * @async
     * @param {string} query - The SQL query to execute.
     * @param {any[*]} params - The parameters to bind to the query.
     * @param {string} [debugName] - Optional label or context name for the debug log.
     * @returns {Promise<Record<any, any>|null>} A promise that resolves to the result of the query execution.
     * @throws {Error} Throws an error if the query fails.
     */
    run: (query: string, params: any[any], debugName?: string) => Promise<Record<any, any> | null>;
    #private;
}
import { EventEmitter } from 'events';