feat(nodejs): expose offset (#1620)

PR closes #1555

nodejs/__test__/table.test.ts

@@ -396,6 +396,10 @@ describe("When creating an index", () => {
       .toArrow();
     expect(rst2.numRows).toBe(2);
     expect(rst.toString()).toEqual(rst2.toString());
+
+    // test offset
+    rst = await tbl.query().limit(2).offset(1).nearestTo(queryVec).toArrow();
+    expect(rst.numRows).toBe(1);
   });
 
   it("should allow parameters to be specified", async () => {

nodejs/lancedb/query.ts

@@ -234,6 +234,11 @@ export class QueryBase<NativeQueryType extends NativeQuery | NativeVectorQuery>
     return this;
   }
 
+  offset(offset: number): this {
+    this.doCall((inner: NativeQueryType) => inner.offset(offset));
+    return this;
+  }
+
   protected nativeExecute(
     options?: Partial<QueryExecutionOptions>,
   ): Promise<NativeBatchIterator> {

nodejs/src/query.rs

@@ -64,6 +64,11 @@ impl Query {
         self.inner = self.inner.clone().limit(limit as usize);
     }
 
+    #[napi]
+    pub fn offset(&mut self, offset: u32) {
+        self.inner = self.inner.clone().offset(offset as usize);
+    }
+
     #[napi]
     pub fn nearest_to(&mut self, vector: Float32Array) -> Result<VectorQuery> {
         let inner = self
@@ -166,6 +171,11 @@ impl VectorQuery {
         self.inner = self.inner.clone().limit(limit as usize);
     }
 
+    #[napi]
+    pub fn offset(&mut self, offset: u32) {
+        self.inner = self.inner.clone().offset(offset as usize);
+    }
+
     #[napi(catch_unwind)]
     pub async fn execute(
         &self,