[Node-DuckDB API](./node-duckdb.md) > [ResultIterator](./node-duckdb.resultiterator.md) ## ResultIterator class ResultIterator represents the result set of a DuckDB query. Instances of this class are returned by the [Connection.executeIterator](./node-duckdb.connection.executeiterator.md). Signature: ```typescript export declare class ResultIterator implements IterableIterator ``` Implements: IterableIterator<T> ## Remarks The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `ResultIterator` class. ## Properties | Property | Modifiers | Type | Description | | ---------------------------------------------------- | --------- | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [isClosed](./node-duckdb.resultiterator.isclosed.md) | | boolean | Returns true if ResultIterator is closed, false otherwise. | | [type](./node-duckdb.resultiterator.type.md) | | [ResultType](./node-duckdb.resulttype.md) | Get the [ResultType](./node-duckdb.resulttype.md) of the ResultIterator. This is specified by the [options](./node-duckdb.iexecuteoptions.forcematerialized.md) argument on [executeIterator](./node-duckdb.connection.executeiterator.md). | ## Methods | Method | Modifiers | Description | | -------------------------------------------------------------------------- | --------- | ------------------------------- | | [\[Symbol.iterator\]()](./node-duckdb.resultiterator._symbol.iterator_.md) | | | | [close()](./node-duckdb.resultiterator.close.md) | | Close the ResultIterator | | [describe()](./node-duckdb.resultiterator.describe.md) | | Describe the result set schema. | | [fetchAllRows()](./node-duckdb.resultiterator.fetchallrows.md) | | Fetch all rows | | [fetchRow()](./node-duckdb.resultiterator.fetchrow.md) | | Fetch the next row | | [next()](./node-duckdb.resultiterator.next.md) | | |