feat(nodejs): table.toArrow function (#1282)

Addresses https://github.com/lancedb/lancedb/issues/1254.

---------

Co-authored-by: universalmind303 <cory.grinstead@gmail.com>

nodejs/__test__/table.test.ts

@@ -21,6 +21,7 @@ import * as arrowOld from "apache-arrow-old";
 
 import { Table, connect } from "../lancedb";
 import {
+  Table as ArrowTable,
   Field,
   FixedSizeList,
   Float,
@@ -94,6 +95,11 @@ describe.each([arrow, arrowOld])("Given a table", (arrow: any) => {
     expect(await table.countRows("id == 7")).toBe(1);
     expect(await table.countRows("id == 10")).toBe(1);
   });
+
+  it("should return the table as an instance of an arrow table", async () => {
+    const arrowTbl = await table.toArrow();
+    expect(arrowTbl).toBeInstanceOf(ArrowTable);
+  });
 });
 
 describe("When creating an index", () => {

nodejs/lancedb/table.ts

@@ -11,8 +11,13 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
-import { Data, Schema, fromDataToBuffer, tableFromIPC } from "./arrow";
+import {
+  Table as ArrowTable,
+  Data,
+  Schema,
+  fromDataToBuffer,
+  tableFromIPC,
+} from "./arrow";
 
 import { getRegistry } from "./embedding/registry";
 import { IndexOptions } from "./indices";
@@ -24,8 +29,8 @@ import {
   Table as _NativeTable,
 } from "./native";
 import { Query, VectorQuery } from "./query";
-
 export { IndexConfig } from "./native";
+
 /**
  * Options for adding data to a table.
  */
@@ -423,4 +428,9 @@ export class Table {
   async listIndices(): Promise<IndexConfig[]> {
     return await this.inner.listIndices();
   }
+
+  /** Return the table as an arrow table */
+  async toArrow(): Promise<ArrowTable> {
+    return await this.query().toArrow();
+  }
 }