import type { DatabaseConnector, ConnectionConfig, TableInfo, ColumnInfo } from '../connector.js';
import type { QueryResult, Row } from '../result-types.js';
export declare class DuckDBConnector implements DatabaseConnector {
    readonly driverName = "duckdb";
    private db;
    private connection;
    connect(config: ConnectionConfig): Promise<void>;
    execute(sql: string, params?: unknown[]): Promise<QueryResult>;
    disconnect(): Promise<void>;
    ping(): Promise<boolean>;
    listTables(): Promise<TableInfo[]>;
    listColumns(schema?: string, table?: string): Promise<ColumnInfo[]>;
}
export declare function resolveDuckDBModule(module: unknown): {
    Database: new (path: string, callback: (err: Error | null) => void) => any;
};
export declare function normalizeDuckDBRow(row: Row): Row;
export declare function normalizeDuckDBValue(value: unknown): unknown;
//# sourceMappingURL=duckdb.d.ts.map