Bump version: 0.9.0-beta.0 → 0.9.0

closes https://github.com/lancedb/lancedb/issues/1359

Cargo.toml

@@ -20,13 +20,11 @@ keywords = ["lancedb", "lance", "database", "vector", "search"]
 categories = ["database-implementations"]
 
 [workspace.dependencies]
-lance = { "version" = "=0.12.4", "features" = [
-    "dynamodb",
-]}
-lance-index = { "version" = "=0.12.4" }
-lance-linalg = { "version" = "=0.12.4" }
-lance-testing = { "version" = "=0.12.4" }
-lance-datafusion = { "version" = "=0.12.4" }
+lance = { "version" = "=0.13.0", "features" = ["dynamodb"] }
+lance-index = { "version" = "=0.13.0" }
+lance-linalg = { "version" = "=0.13.0" }
+lance-testing = { "version" = "=0.13.0" }
+lance-datafusion = { "version" = "=0.13.0" }
 # Note that this one does not include pyarrow
 arrow = { version = "51.0", optional = false }
 arrow-array = "51.0"

docs/src/fts.md

@@ -54,6 +54,16 @@ This returns the result as a list of dictionaries as follows.
 !!! note
     LanceDB automatically searches on the existing FTS index if the input to the search is of type `str`. If you provide a vector as input, LanceDB will search the ANN index instead.
 
+## Tokenization
+By default the text is tokenized by splitting on punctuation and whitespaces and then removing tokens that are longer than 40 chars. For more language specific tokenization then provide the argument tokenizer_name with the 2 letter language code followed by "_stem". So for english it would be "en_stem".
+
+```python
+table.create_fts_index("text", tokenizer_name="en_stem")
+```
+
+The following [languages](https://docs.rs/tantivy/latest/tantivy/tokenizer/enum.Language.html) are currently supported.
+
+
 ## Index multiple columns
 
 If you have multiple string columns to index, there's no need to combine them manually -- simply pass them all as a list to `create_fts_index`:
@@ -139,6 +149,7 @@ is treated as a phrase query.
 In general, a query that's declared as a phrase query will be wrapped in double quotes during parsing, with nested
 double quotes replaced by single quotes.
 
+
 ## Configurations
 
 By default, LanceDB configures a 1GB heap size limit for creating the index. You can

node/package.json

@@ -6,7 +6,7 @@
   "types": "dist/index.d.ts",
   "scripts": {
     "tsc": "tsc -b",
-    "build": "npm run tsc && cargo-cp-artifact --artifact cdylib lancedb-node index.node -- cargo build --message-format=json",
+    "build": "npm run tsc && cargo-cp-artifact --artifact cdylib lancedb_node index.node -- cargo build --message-format=json",
     "build-release": "npm run build -- --release",
     "test": "npm run tsc && mocha -recursive dist/test",
     "integration-test": "npm run tsc && mocha -recursive dist/integration_test",

nodejs/__test__/connection.test.ts

@@ -57,6 +57,18 @@ describe("given a connection", () => {
     expect(db.isOpen()).toBe(false);
     await expect(db.tableNames()).rejects.toThrow("Connection is closed");
   });
+  it("should be able to create a table from an object arg `createTable(options)`, or args `createTable(name, data, options)`", async () => {
+    let tbl = await db.createTable("test", [{ id: 1 }, { id: 2 }]);
+    await expect(tbl.countRows()).resolves.toBe(2);
+
+    tbl = await db.createTable({
+      name: "test",
+      data: [{ id: 3 }],
+      mode: "overwrite",
+    });
+
+    await expect(tbl.countRows()).resolves.toBe(1);
+  });
 
   it("should fail if creating table twice, unless overwrite is true", async () => {
     let tbl = await db.createTable("test", [{ id: 1 }, { id: 2 }]);

nodejs/__test__/embedding.test.ts

@@ -230,7 +230,7 @@ describe("embedding functions", () => {
     },
   );
 
-  test.only.each([new Float16(), new Float32(), new Float64()])(
+  test.each([new Float16(), new Float32(), new Float64()])(
     "should be able to provide auto embeddings with multiple float datatypes",
     async (floatType) => {
       @register("test1")

nodejs/__test__/table.test.ts

@@ -305,6 +305,7 @@ describe("When creating an index", () => {
     const indices = await tbl.listIndices();
     expect(indices.length).toBe(1);
     expect(indices[0]).toEqual({
+      name: "vec_idx",
       indexType: "IvfPq",
       columns: ["vec"],
     });
@@ -361,6 +362,24 @@ describe("When creating an index", () => {
     for await (const r of tbl.query().where("id > 1").select(["id"])) {
       expect(r.numRows).toBe(298);
     }
+    // should also work with 'filter' alias
+    for await (const r of tbl.query().filter("id > 1").select(["id"])) {
+      expect(r.numRows).toBe(298);
+    }
+  });
+
+  test("should be able to get index stats", async () => {
+    await tbl.createIndex("id");
+
+    const stats = await tbl.indexStats("id_idx");
+    expect(stats).toBeDefined();
+    expect(stats?.numIndexedRows).toEqual(300);
+    expect(stats?.numUnindexedRows).toEqual(0);
+  });
+
+  test("when getting stats on non-existent index", async () => {
+    const stats = await tbl.indexStats("some non-existent index");
+    expect(stats).toBeUndefined();
   });
 
   // TODO: Move this test to the query API test (making sure we can reject queries

nodejs/lancedb/connection.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Table as ArrowTable, Schema } from "./arrow";
+import { Table as ArrowTable, Data, Schema } from "./arrow";
 import { fromTableToBuffer, makeEmptyTable } from "./arrow";
 import { EmbeddingFunctionConfig, getRegistry } from "./embedding/registry";
 import { Connection as LanceDbConnection } from "./native";
@@ -151,6 +151,19 @@ export abstract class Connection {
     options?: Partial<OpenTableOptions>,
   ): Promise<Table>;
 
+  /**
+   * Creates a new Table and initialize it with new data.
+   * @param {object} options - The options object.
+   * @param {string} options.name - The name of the table.
+   * @param {Data} options.data - Non-empty Array of Records to be inserted into the table
+   *
+   */
+  abstract createTable(
+    options: {
+      name: string;
+      data: Data;
+    } & Partial<CreateTableOptions>,
+  ): Promise<Table>;
   /**
    * Creates a new Table and initialize it with new data.
    * @param {string} name - The name of the table.
@@ -219,13 +232,22 @@ export class LocalConnection extends Connection {
   }
 
   async createTable(
-    name: string,
-    data: Record<string, unknown>[] | ArrowTable,
+    nameOrOptions:
+      | string
+      | ({ name: string; data: Data } & Partial<CreateTableOptions>),
+    data?: Record<string, unknown>[] | ArrowTable,
     options?: Partial<CreateTableOptions>,
   ): Promise<Table> {
+    if (typeof nameOrOptions !== "string" && "name" in nameOrOptions) {
+      const { name, data, ...options } = nameOrOptions;
+      return this.createTable(name, data, options);
+    }
+    if (data === undefined) {
+      throw new Error("data is required");
+    }
     const { buf, mode } = await Table.parseTableData(data, options);
     const innerTable = await this.inner.createTable(
-      name,
+      nameOrOptions,
       buf,
       mode,
       cleanseStorageOptions(options?.storageOptions),

nodejs/lancedb/index.ts

@@ -31,6 +31,9 @@ export {
   AddColumnsSql,
   ColumnAlteration,
   ConnectionOptions,
+  IndexStatistics,
+  IndexMetadata,
+  IndexConfig,
 } from "./native.js";
 
 export {
@@ -56,12 +59,7 @@ export {
 
 export { Index, IndexOptions, IvfPqOptions } from "./indices";
 
-export {
-  Table,
-  AddDataOptions,
-  IndexConfig,
-  UpdateOptions,
-} from "./table";
+export { Table, AddDataOptions, UpdateOptions } from "./table";
 
 export * as embedding from "./embedding";
 
@@ -76,15 +74,61 @@ export * as embedding from "./embedding";
  * @param {string} uri - The uri of the database. If the database uri starts
  * with `db://` then it connects to a remote database.
  * @see {@link ConnectionOptions} for more details on the URI format.
+ * @example
+ * ```ts
+ * const conn = await connect("/path/to/database");
+ * ```
+ * @example
+ * ```ts
+ * const conn = await connect(
+ *   "s3://bucket/path/to/database",
+ *   {storageOptions: {timeout: "60s"}
+ * });
+ * ```
  */
 export async function connect(
   uri: string,
   opts?: Partial<ConnectionOptions | RemoteConnectionOptions>,
+): Promise<Connection>;
+/**
+ * Connect to a LanceDB instance at the given URI.
+ *
+ * Accepted formats:
+ *
+ * - `/path/to/database` - local database
+ * - `s3://bucket/path/to/database` or `gs://bucket/path/to/database` - database on cloud storage
+ * - `db://host:port` - remote database (LanceDB cloud)
+ * @param  options - The options to use when connecting to the database
+ * @see {@link ConnectionOptions} for more details on the URI format.
+ * @example
+ * ```ts
+ * const conn = await connect({
+ *   uri: "/path/to/database",
+ *   storageOptions: {timeout: "60s"}
+ * });
+ * ```
+ */
+export async function connect(
+  opts: Partial<RemoteConnectionOptions | ConnectionOptions> & { uri: string },
+): Promise<Connection>;
+export async function connect(
+  uriOrOptions:
+    | string
+    | (Partial<RemoteConnectionOptions | ConnectionOptions> & { uri: string }),
+  opts: Partial<ConnectionOptions | RemoteConnectionOptions> = {},
 ): Promise<Connection> {
+  let uri: string | undefined;
+  if (typeof uriOrOptions !== "string") {
+    const { uri: uri_, ...options } = uriOrOptions;
+    uri = uri_;
+    opts = options;
+  } else {
+    uri = uriOrOptions;
+  }
+
   if (!uri) {
     throw new Error("uri is required");
   }
-  opts = opts ?? {};
 
   if (uri?.startsWith("db://")) {
     return new RemoteConnection(uri, opts as RemoteConnectionOptions);

nodejs/lancedb/query.ts

@@ -114,6 +114,14 @@ export class QueryBase<
     this.inner.onlyIf(predicate);
     return this as unknown as QueryType;
   }
+  /**
+   * A filter statement to be applied to this query.
+   * @alias where
+   * @deprecated Use `where` instead
+   */
+  filter(predicate: string): QueryType {
+    return this.where(predicate);
+  }
 
   /**
    * Return only the specified columns.

nodejs/lancedb/remote/connection.ts

@@ -106,10 +106,19 @@ export class RemoteConnection extends Connection {
   }
 
   async createTable(
-    tableName: string,
-    data: Data,
+    nameOrOptions:
+      | string
+      | ({ name: string; data: Data } & Partial<CreateTableOptions>),
+    data?: Data,
     options?: Partial<CreateTableOptions> | undefined,
   ): Promise<Table> {
+    if (typeof nameOrOptions !== "string" && "name" in nameOrOptions) {
+      const { name, data, ...options } = nameOrOptions;
+      return this.createTable(name, data, options);
+    }
+    if (data === undefined) {
+      throw new Error("data is required");
+    }
     if (options?.mode) {
       console.warn(
         "option 'mode' is not supported in LanceDB Cloud",
@@ -132,7 +141,7 @@ export class RemoteConnection extends Connection {
     );
 
     await this.#client.post(
-      `/v1/table/${encodeURIComponent(tableName)}/create/`,
+      `/v1/table/${encodeURIComponent(nameOrOptions)}/create/`,
       buf,
       {
         config: {
@@ -141,8 +150,8 @@ export class RemoteConnection extends Connection {
         headers: { "Content-Type": "application/vnd.apache.arrow.stream" },
       },
     );
-    this.#tableCache.set(tableName, true);
-    return new RemoteTable(this.#client, tableName, this.#dbName);
+    this.#tableCache.set(nameOrOptions, true);
+    return new RemoteTable(this.#client, nameOrOptions, this.#dbName);
   }
 
   async createEmptyTable(

nodejs/lancedb/remote/table.ts

@@ -16,6 +16,7 @@ import { Table as ArrowTable } from "apache-arrow";
 
 import { Data, IntoVector } from "../arrow";
 
+import { IndexStatistics } from "..";
 import { CreateTableOptions } from "../connection";
 import { IndexOptions } from "../indices";
 import { MergeInsertBuilder } from "../merge";
@@ -34,6 +35,10 @@ export class RemoteTable extends Table {
     return `/v1/table/${encodeURIComponent(this.#name)}/`;
   }
 
+  get name(): string {
+    return this.#name;
+  }
+
   public constructor(
     client: RestfulLanceDBClient,
     tableName: string,
@@ -161,4 +166,7 @@ export class RemoteTable extends Table {
   mergeInsert(_on: string | string[]): MergeInsertBuilder {
     throw new Error("mergeInsert() is not yet supported on the LanceDB cloud");
   }
+  async indexStats(_name: string): Promise<IndexStatistics | undefined> {
+    throw new Error("indexStats() is not yet supported on the LanceDB cloud");
+  }
 }

nodejs/lancedb/table.ts

@@ -33,11 +33,11 @@ import {
   AddColumnsSql,
   ColumnAlteration,
   IndexConfig,
+  IndexStatistics,
   OptimizeStats,
   Table as _NativeTable,
 } from "./native";
 import { Query, VectorQuery } from "./query";
-export { IndexConfig } from "./native";
 
 /**
  * Options for adding data to a table.
@@ -98,6 +98,8 @@ export abstract class Table {
   [Symbol.for("nodejs.util.inspect.custom")](): string {
     return this.display();
   }
+  /** Returns the name of the table */
+  abstract get name(): string;
 
   /** Return true if the table has not been closed */
   abstract isOpen(): boolean;
@@ -158,6 +160,9 @@ export abstract class Table {
    * Indices on vector columns will speed up vector searches.
    * Indices on scalar columns will speed up filtering (in both
    * vector and non-vector searches)
+   *
+   * @note We currently don't support custom named indexes,
+   * The index name will always be `${column}_idx`
    * @example
    * // If the column has a vector (fixed size list) data type then
    * // an IvfPq vector index will be created.
@@ -368,6 +373,13 @@ export abstract class Table {
 
   abstract mergeInsert(on: string | string[]): MergeInsertBuilder;
 
+  /** List all the stats of a specified index
+   *
+   * @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
+   */
+  abstract indexStats(name: string): Promise<IndexStatistics | undefined>;
+
   static async parseTableData(
     // biome-ignore lint/suspicious/noExplicitAny: <explanation>
     data: Record<string, unknown>[] | ArrowTable<any>,
@@ -412,7 +424,9 @@ export class LocalTable extends Table {
     super();
     this.inner = inner;
   }
-
+  get name(): string {
+    return this.inner.name;
+  }
   isOpen(): boolean {
     return this.inner.isOpen();
   }
@@ -565,6 +579,13 @@ export class LocalTable extends Table {
     return await this.query().toArrow();
   }
 
+  async indexStats(name: string): Promise<IndexStatistics | undefined> {
+    const stats = await this.inner.indexStats(name);
+    if (stats === null) {
+      return undefined;
+    }
+    return stats;
+  }
   mergeInsert(on: string | string[]): MergeInsertBuilder {
     on = Array.isArray(on) ? on : [on];
     return new MergeInsertBuilder(this.inner.mergeInsert(on));

nodejs/package-lock.json

@@ -18,10 +18,8 @@
         "win32"
       ],
       "dependencies": {
-        "@types/axios": "^0.14.0",
         "apache-arrow": "^15.0.0",
         "axios": "^1.7.2",
-        "memoize": "^10.0.0",
         "openai": "^4.29.2",
         "reflect-metadata": "^0.2.2"
       },
@@ -31,6 +29,7 @@
         "@biomejs/biome": "^1.7.3",
         "@jest/globals": "^29.7.0",
         "@napi-rs/cli": "^2.18.0",
+        "@types/axios": "^0.14.0",
         "@types/jest": "^29.1.2",
         "@types/tmp": "^0.2.6",
         "apache-arrow-old": "npm:apache-arrow@13.0.0",
@@ -3131,6 +3130,7 @@
       "resolved": "https://registry.npmjs.org/@types/axios/-/axios-0.14.0.tgz",
       "integrity": "sha512-KqQnQbdYE54D7oa/UmYVMZKq7CO4l8DEENzOKc4aBRwxCXSlJXGz83flFx5L7AWrOQnmuN3kVsRdt+GZPPjiVQ==",
       "deprecated": "This is a stub types definition for axios (https://github.com/mzabriskie/axios). axios provides its own type definitions, so you don't need @types/axios installed!",
+      "dev": true,
       "dependencies": {
         "axios": "*"
       }
@@ -5942,20 +5942,6 @@
         "is-buffer": "~1.1.6"
       }
     },
-    "node_modules/memoize": {
-      "version": "10.0.0",
-      "resolved": "https://registry.npmjs.org/memoize/-/memoize-10.0.0.tgz",
-      "integrity": "sha512-H6cBLgsi6vMWOcCpvVCdFFnl3kerEXbrYh9q+lY6VXvQSmM6CkmV08VOwT+WE2tzIEqRPFfAq3fm4v/UIW6mSA==",
-      "dependencies": {
-        "mimic-function": "^5.0.0"
-      },
-      "engines": {
-        "node": ">=18"
-      },
-      "funding": {
-        "url": "https://github.com/sindresorhus/memoize?sponsor=1"
-      }
-    },
     "node_modules/merge-stream": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/merge-stream/-/merge-stream-2.0.0.tgz",
@@ -6003,17 +5989,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/mimic-function": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/mimic-function/-/mimic-function-5.0.1.tgz",
-      "integrity": "sha512-VP79XUPxV2CigYP3jWwAUFSku2aKqBH7uTAapFWCBqutsbmDo96KY5o8uh6U+/YSIn5OxJnXp73beVkpqMIGhA==",
-      "engines": {
-        "node": ">=18"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/minimatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",

nodejs/package.json

@@ -1,5 +1,15 @@
 {
   "name": "@lancedb/lancedb",
+  "description": "LanceDB: A serverless, low-latency vector database for AI applications",
+  "keywords": [
+    "database",
+    "lance",
+    "lancedb",
+    "search",
+    "vector",
+    "vector database",
+    "ann"
+  ],
   "version": "0.5.2",
   "main": "dist/index.js",
   "exports": {
@@ -38,7 +48,8 @@
     "typedoc": "^0.25.7",
     "typedoc-plugin-markdown": "^3.17.1",
     "typescript": "^5.3.3",
-    "typescript-eslint": "^7.1.0"
+    "typescript-eslint": "^7.1.0",
+    "@types/axios": "^0.14.0"
   },
   "ava": {
     "timeout": "3m"
@@ -65,7 +76,6 @@
     "version": "napi version"
   },
   "dependencies": {
-    "@types/axios": "^0.14.0",
     "apache-arrow": "^15.0.0",
     "axios": "^1.7.2",
     "openai": "^4.29.2",

nodejs/src/connection.rs

@@ -56,12 +56,6 @@ impl Connection {
     #[napi(factory)]
     pub async fn new(uri: String, options: ConnectionOptions) -> napi::Result<Self> {
         let mut builder = ConnectBuilder::new(&uri);
-        if let Some(api_key) = options.api_key {
-            builder = builder.api_key(&api_key);
-        }
-        if let Some(host_override) = options.host_override {
-            builder = builder.host_override(&host_override);
-        }
         if let Some(interval) = options.read_consistency_interval {
             builder =
                 builder.read_consistency_interval(std::time::Duration::from_secs_f64(interval));

nodejs/src/lib.rs

@@ -28,8 +28,6 @@ mod util;
 #[napi(object)]
 #[derive(Debug)]
 pub struct ConnectionOptions {
-    pub api_key: Option<String>,
-    pub host_override: Option<String>,
     /// (For LanceDB OSS only): The interval, in seconds, at which to check for
     /// updates to the table from other processes. If None, then consistency is not
     /// checked. For performance reasons, this is the default. For strong

nodejs/src/table.rs

@@ -30,7 +30,7 @@ use crate::query::{Query, VectorQuery};
 pub struct Table {
     // We keep a duplicate of the table name so we can use it for error
     // messages even if the table has been closed
-    name: String,
+    pub name: String,
     pub(crate) inner: Option<LanceDbTable>,
 }
 
@@ -330,6 +330,13 @@ impl Table {
             .collect::<Vec<_>>())
     }
 
+    #[napi]
+    pub async fn index_stats(&self, index_name: String) -> napi::Result<Option<IndexStatistics>> {
+        let tbl = self.inner_ref()?.as_native().unwrap();
+        let stats = tbl.index_stats(&index_name).await.default_error()?;
+        Ok(stats.map(IndexStatistics::from))
+    }
+
     #[napi]
     pub fn merge_insert(&self, on: Vec<String>) -> napi::Result<NativeMergeInsertBuilder> {
         let on: Vec<_> = on.iter().map(String::as_str).collect();
@@ -340,11 +347,13 @@ impl Table {
 #[napi(object)]
 /// A description of an index currently configured on a column
 pub struct IndexConfig {
+    /// The name of the index
+    pub name: String,
     /// The type of the index
     pub index_type: String,
     /// The columns in the index
     ///
-    /// Currently this is always an array of size 1.  In the future there may
+    /// Currently this is always an array of size 1. In the future there may
     /// be more columns to represent composite indices.
     pub columns: Vec<String>,
 }
@@ -355,6 +364,7 @@ impl From<lancedb::index::IndexConfig> for IndexConfig {
         Self {
             index_type,
             columns: value.columns,
+            name: value.name,
         }
     }
 }
@@ -437,3 +447,40 @@ pub struct AddColumnsSql {
     /// The expression can reference other columns in the table.
     pub value_sql: String,
 }
+
+#[napi(object)]
+pub struct IndexStatistics {
+    /// The number of rows indexed by the index
+    pub num_indexed_rows: f64,
+    /// The number of rows not indexed
+    pub num_unindexed_rows: f64,
+    /// The type of the index
+    pub index_type: Option<String>,
+    /// The metadata for each index
+    pub indices: Vec<IndexMetadata>,
+}
+impl From<lancedb::index::IndexStatistics> for IndexStatistics {
+    fn from(value: lancedb::index::IndexStatistics) -> Self {
+        Self {
+            num_indexed_rows: value.num_indexed_rows as f64,
+            num_unindexed_rows: value.num_unindexed_rows as f64,
+            index_type: value.index_type.map(|t| format!("{:?}", t)),
+            indices: value.indices.into_iter().map(Into::into).collect(),
+        }
+    }
+}
+
+#[napi(object)]
+pub struct IndexMetadata {
+    pub metric_type: Option<String>,
+    pub index_type: Option<String>,
+}
+
+impl From<lancedb::index::IndexMetadata> for IndexMetadata {
+    fn from(value: lancedb::index::IndexMetadata) -> Self {
+        Self {
+            metric_type: value.metric_type,
+            index_type: value.index_type,
+        }
+    }
+}

python/.bumpversion.toml

@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.8.2"
+current_version = "0.9.0"
 parse = """(?x)
     (?P<major>0|[1-9]\\d*)\\.
     (?P<minor>0|[1-9]\\d*)\\.

python/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lancedb-python"
-version = "0.8.2"
+version = "0.9.0"
 edition.workspace = true
 description = "Python bindings for LanceDB"
 license.workspace = true

python/pyproject.toml

@@ -3,7 +3,7 @@ name = "lancedb"
 # version in Cargo.toml
 dependencies = [
     "deprecation",
-    "pylance==0.12.2-beta.2",
+    "pylance==0.13.0",
     "ratelimiter~=1.0",
     "requests>=2.31.0",
     "retry>=0.9.2",

python/python/lancedb/fts.py

@@ -29,7 +29,10 @@ from .table import LanceTable
 
 
 def create_index(
-    index_path: str, text_fields: List[str], ordering_fields: List[str] = None
+    index_path: str,
+    text_fields: List[str],
+    ordering_fields: List[str] = None,
+    tokenizer_name: str = "default",
 ) -> tantivy.Index:
     """
     Create a new Index (not populated)
@@ -42,6 +45,8 @@ def create_index(
         List of text fields to index
     ordering_fields: List[str]
         List of unsigned type fields to order by at search time
+    tokenizer_name : str, default "default"
+        The tokenizer to use
 
     Returns
     -------
@@ -56,7 +61,7 @@ def create_index(
     schema_builder.add_integer_field("doc_id", stored=True)
     # data fields
     for name in text_fields:
-        schema_builder.add_text_field(name, stored=True)
+        schema_builder.add_text_field(name, stored=True, tokenizer_name=tokenizer_name)
     if ordering_fields:
         for name in ordering_fields:
             schema_builder.add_unsigned_field(name, fast=True)

python/python/lancedb/table.py

@@ -1171,6 +1171,7 @@ class LanceTable(Table):
         *,
         replace: bool = False,
         writer_heap_size: Optional[int] = 1024 * 1024 * 1024,
+        tokenizer_name: str = "default",
     ):
         """Create a full-text search index on the table.
 
@@ -1189,6 +1190,10 @@ class LanceTable(Table):
         ordering_field_names:
             A list of unsigned type fields to index to optionally order
             results on at search time
+        tokenizer_name: str, default "default"
+            The tokenizer to use for the index. Can be "raw", "default" or the 2 letter
+            language code followed by "_stem". So for english it would be "en_stem".
+            For available languages see: https://docs.rs/tantivy/latest/tantivy/tokenizer/enum.Language.html
         """
         from .fts import create_index, populate_index
 
@@ -1214,6 +1219,7 @@ class LanceTable(Table):
             self._get_fts_index_path(),
             field_names,
             ordering_fields=ordering_field_names,
+            tokenizer_name=tokenizer_name,
         )
         populate_index(
             index,

python/python/tests/test_fts.py

@@ -66,6 +66,17 @@ def test_create_index(tmp_path):
     assert os.path.exists(str(tmp_path / "index"))
 
 
+def test_create_index_with_stemming(tmp_path, table):
+    index = ldb.fts.create_index(
+        str(tmp_path / "index"), ["text"], tokenizer_name="en_stem"
+    )
+    assert isinstance(index, tantivy.Index)
+    assert os.path.exists(str(tmp_path / "index"))
+
+    # Check stemming by running tokenizer on non empty table
+    table.create_fts_index("text", tokenizer_name="en_stem")
+
+
 def test_populate_index(tmp_path, table):
     index = ldb.fts.create_index(str(tmp_path / "index"), ["text"])
     assert ldb.fts.populate_index(index, table, ["text"]) == len(table)

rust/ffi/node/src/table.rs

@@ -463,6 +463,7 @@ impl JsTable {
         Ok(promise)
     }
 
+    #[allow(deprecated)]
     pub(crate) fn js_index_stats(mut cx: FunctionContext) -> JsResult<JsPromise> {
         let js_table = cx.this().downcast_or_throw::<JsBox<Self>, _>(&mut cx)?;
         let rt = runtime(&mut cx)?;

rust/lancedb/src/index.rs

@@ -80,6 +80,8 @@ pub enum IndexType {
 
 /// A description of an index currently configured on a column
 pub struct IndexConfig {
+    /// The name of the index
+    pub name: String,
     /// The type of the index
     pub index_type: IndexType,
     /// The columns in the index

rust/lancedb/src/table.rs

@@ -1206,28 +1206,36 @@ impl NativeTable {
             .await)
     }
 
+    #[deprecated(since = "0.5.2", note = "Please use `index_stats` instead")]
     pub async fn count_indexed_rows(&self, index_uuid: &str) -> Result<Option<usize>> {
+        #[allow(deprecated)]
         match self.load_index_stats(index_uuid).await? {
             Some(stats) => Ok(Some(stats.num_indexed_rows)),
             None => Ok(None),
         }
     }
 
+    #[deprecated(since = "0.5.2", note = "Please use `index_stats` instead")]
     pub async fn count_unindexed_rows(&self, index_uuid: &str) -> Result<Option<usize>> {
+        #[allow(deprecated)]
         match self.load_index_stats(index_uuid).await? {
             Some(stats) => Ok(Some(stats.num_unindexed_rows)),
             None => Ok(None),
         }
     }
 
+    #[deprecated(since = "0.5.2", note = "Please use `index_stats` instead")]
     pub async fn get_index_type(&self, index_uuid: &str) -> Result<Option<String>> {
+        #[allow(deprecated)]
         match self.load_index_stats(index_uuid).await? {
             Some(stats) => Ok(Some(stats.index_type.unwrap_or_default())),
             None => Ok(None),
         }
     }
 
+    #[deprecated(since = "0.5.2", note = "Please use `index_stats` instead")]
     pub async fn get_distance_type(&self, index_uuid: &str) -> Result<Option<String>> {
+        #[allow(deprecated)]
         match self.load_index_stats(index_uuid).await? {
             Some(stats) => Ok(Some(
                 stats
@@ -1240,16 +1248,8 @@ impl NativeTable {
         }
     }
 
-    pub async fn load_indices(&self) -> Result<Vec<VectorIndex>> {
-        let dataset = self.dataset.get().await?;
-        let (indices, mf) = futures::try_join!(dataset.load_indices(), dataset.latest_manifest())?;
-        Ok(indices
-            .iter()
-            .map(|i| VectorIndex::new_from_format(&mf, i))
-            .collect())
-    }
-
-    async fn load_index_stats(&self, index_uuid: &str) -> Result<Option<IndexStatistics>> {
+    #[deprecated(since = "0.5.2", note = "Please use `index_stats` instead")]
+    pub async fn load_index_stats(&self, index_uuid: &str) -> Result<Option<IndexStatistics>> {
         let index = self
             .load_indices()
             .await?
@@ -1268,6 +1268,35 @@ impl NativeTable {
         Ok(Some(index_stats))
     }
 
+    /// Get statistics about an index.
+    /// Returns an error if the index does not exist.
+    pub async fn index_stats<S: AsRef<str>>(
+        &self,
+        index_name: S,
+    ) -> Result<Option<IndexStatistics>> {
+        self.dataset
+            .get()
+            .await?
+            .index_statistics(index_name.as_ref())
+            .await
+            .ok()
+            .map(|stats| {
+                serde_json::from_str(&stats).map_err(|e| Error::InvalidInput {
+                    message: format!("error deserializing index statistics: {}", e),
+                })
+            })
+            .transpose()
+    }
+
+    pub async fn load_indices(&self) -> Result<Vec<VectorIndex>> {
+        let dataset = self.dataset.get().await?;
+        let (indices, mf) = futures::try_join!(dataset.load_indices(), dataset.latest_manifest())?;
+        Ok(indices
+            .iter()
+            .map(|i| VectorIndex::new_from_format(&mf, i))
+            .collect())
+    }
+
     async fn create_ivf_pq_index(
         &self,
         index: IvfPqIndexBuilder,
@@ -1860,12 +1889,20 @@ impl TableInternal for NativeTable {
                 }
                 columns.push(field.name.clone());
             }
-            Ok(IndexConfig { index_type: if is_vector { crate::index::IndexType::IvfPq } else { crate::index::IndexType::BTree }, columns })
+            let index_type = if is_vector {
+                crate::index::IndexType::IvfPq
+            } else {
+                crate::index::IndexType::BTree
+            };
+
+            let name = idx.name.clone();
+            Ok(IndexConfig { index_type, columns, name })
         }).collect::<Result<Vec<_>>>()
     }
 }
 
 #[cfg(test)]
+#[allow(deprecated)]
 mod tests {
     use std::iter;
     use std::sync::atomic::{AtomicBool, Ordering};