feat: add drop_index() method (#2039)

Closes #1665

nodejs/__test__/table.test.ts

@@ -473,6 +473,10 @@ describe("When creating an index", () => {
     // test offset
     rst = await tbl.query().limit(2).offset(1).nearestTo(queryVec).toArrow();
     expect(rst.numRows).toBe(1);
+
+    await tbl.dropIndex("vec_idx");
+    const indices2 = await tbl.listIndices();
+    expect(indices2.length).toBe(0);
   });
 
   it("should search with distance range", async () => {

nodejs/lancedb/table.ts

@@ -226,6 +226,19 @@ export abstract class Table {
     column: string,
     options?: Partial<IndexOptions>,
   ): Promise<void>;
+
+  /**
+   * Drop an index from the table.
+   *
+   * @param name The name of the index.
+   *
+   * @note This does not delete the index from disk, it just removes it from the table.
+   * To delete the index, run {@link Table#optimize} after dropping the index.
+   *
+   * Use {@link Table.listIndices} to find the names of the indices.
+   */
+  abstract dropIndex(name: string): Promise<void>;
+
   /**
    * Create a {@link Query} Builder.
    *
@@ -426,6 +439,8 @@ export abstract class Table {
    *
    * @param {string} name The name of the index.
    * @returns {IndexStatistics | undefined} The stats of the index. If the index does not exist, it will return undefined
+   *
+   * Use {@link Table.listIndices} to find the names of the indices.
    */
   abstract indexStats(name: string): Promise<IndexStatistics | undefined>;
 
@@ -591,6 +606,10 @@ export class LocalTable extends Table {
     await this.inner.createIndex(nativeIndex, column, options?.replace);
   }
 
+  async dropIndex(name: string): Promise<void> {
+    await this.inner.dropIndex(name);
+  }
+
   query(): Query {
     return new Query(this.inner);
   }

nodejs/src/table.rs

@@ -135,6 +135,14 @@ impl Table {
         builder.execute().await.default_error()
     }
 
+    #[napi(catch_unwind)]
+    pub async fn drop_index(&self, index_name: String) -> napi::Result<()> {
+        self.inner_ref()?
+            .drop_index(&index_name)
+            .await
+            .default_error()
+    }
+
     #[napi(catch_unwind)]
     pub async fn update(
         &self,