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### Summary Closes #3363 Adds the four namespace management methods to the NodeJS `Connection`, bringing parity with the Rust core and Python bindings: - `listNamespaces(parent?, options?)` - `createNamespace(namespacePath, options?)` - `dropNamespace(namespacePath, options?)` - `describeNamespace(namespacePath)` ### Test plan - npm test - Ran a smoke test script ```typescript import { connect } from '<lancePath>' import { tmpdir } from "os"; import { mkdtempSync } from "fs"; import { join } from "path"; const dir = mkdtempSync(join(tmpdir(), "lancedb-smoke-")); console.log(`Using temp dir: ${dir}\n`); const db = await connect(dir, { namespaceClientProperties: { manifest_enabled: "true" }, }); console.log("Creating namespaces..."); await db.createNamespace(["analytics"]); await db.createNamespace(["analytics", "sales"], { properties: { owner: "brendan", purpose: "smoke-test" }, }); await db.createNamespace(["marketing"]); const root = await db.listNamespaces(); console.log("Root namespaces:", root.namespaces); const children = await db.listNamespaces(["analytics"]); console.log("Children of 'analytics':", children.namespaces); const descWithProps = await db.describeNamespace(["analytics", "sales"]); console.log("Describe analytics/sales (with properties):", descWithProps); const descNoProps = await db.describeNamespace(["analytics"]); console.log("Describe analytics (no properties):", descNoProps); console.log("Describing a non-existent namespace (expect error)..."); try { await db.describeNamespace(["does-not-exist"]); console.error(" UNEXPECTED: describe succeeded for non-existent namespace"); } catch (err) { console.log(` ✓ Got expected error: ${err.message.split("\n")[0]}`); } await db.dropNamespace(["marketing"]); const afterDrop = await db.listNamespaces(); console.log("Root after dropping marketing:", afterDrop.namespaces); await db.close(); console.log("\nAll operations completed successfully."); ``` ``` Using temp dir: /var/folders/bj/hn6jv9c50y301d1nx0y8xmn00000gn/T/lancedb-smoke-MUC5NI Creating namespaces... Root namespaces: [ 'analytics', 'marketing' ] Children of 'analytics': [ 'sales' ] Describe analytics/sales (with properties): { properties: { purpose: 'smoke-test', owner: 'brendan' } } Describe analytics (no properties): {} Describing a non-existent namespace (expect error)... ✓ Got expected error: lance error: Namespace error: Namespace not found: does-not-exist, rust/lance-namespace-impls/src/dir/manifest.rs:2495:14 Caused by: Namespace error: Namespace not found: does-not-exist, rust/lance-namespace-impls/src/dir/manifest.rs:2495:14 Caused by: Namespace not found: does-not-exist Root after dropping marketing: [ 'analytics' ] All operations completed successfully. ``` ### Documentation - regenerated docs
LanceDB JavaScript SDK
A JavaScript library for LanceDB.
Installation
npm install @lancedb/lancedb
This will download the appropriate native library for your platform. We currently support:
- Linux (x86_64 and aarch64 on glibc and musl)
- MacOS (Intel and ARM/M1/M2)
- Windows (x86_64 and aarch64)
Usage
Basic Example
import * as lancedb from "@lancedb/lancedb";
const db = await lancedb.connect("data/sample-lancedb");
const table = await db.createTable("my_table", [
{ id: 1, vector: [0.1, 1.0], item: "foo", price: 10.0 },
{ id: 2, vector: [3.9, 0.5], item: "bar", price: 20.0 },
]);
const results = await table.vectorSearch([0.1, 0.3]).limit(20).toArray();
console.log(results);
The quickstart contains more complete examples.
Development
See CONTRIBUTING.md for information on how to contribute to LanceDB.