import duckdb from '@duckdb/node-bindings';
export declare class DuckDBTableFunctionInitInfo {
    private readonly init_info;
    constructor(init_info: duckdb.TableFunctionInitInfo);
    get extraInfo(): object | undefined;
    getExtraInfo(): object | undefined;
    get bindData(): object | undefined;
    getBindData(): object | undefined;
    /**
     * The number of columns the scan has been asked for, which is all of them
     * unless the function opted into projection pushdown.
     */
    get columnCount(): number;
    getColumnCount(): number;
    /** The index, among the bound result columns, of the given projected column. */
    getColumnIndex(columnIndex: number): number;
    /** All projected column indexes, in order. */
    getColumnIndexes(): number[];
    setInitData(initData: object): void;
    setMaxThreads(maxThreads: number): void;
    setError(error: string): void;
}