YDB JavaScript SDK

Modern, modular SDK for YDB in TypeScript/JavaScript.

• Type‑safe YQL queries with tagged templates
• Automatic parameter binding and transactions
• Rich value/type system with @ydbjs/value
• Clear errors, retries, and diagnostics

Other versions

• v5
• v4

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Packages

• @ydbjs/core: Core connection and utilities
• @ydbjs/query: YQL queries, transactions, parameters
• @ydbjs/coordination: Coordination nodes and distributed semaphores
• @ydbjs/value: YDB types and values
• @ydbjs/api: gRPC/Protobuf service definitions
• @ydbjs/error: YDB error handling
• @ydbjs/auth: Authentication (tokens, anonymous, metadata)
• @ydbjs/retry: Flexible retry policies

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Quick Start

1) Install

npm install @ydbjs/core @ydbjs/query

2) Connect and Query

import { Driver } from '@ydbjs/core'
import { query } from '@ydbjs/query'

const driver = new Driver('grpc://localhost:2136/local')
await driver.ready()

const sql = query(driver)
const resultSets = await sql`SELECT 1 + 1 AS sum`
console.log(resultSets) // [ [ { sum: 2 } ] ]

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Documentation

• @ydbjs/core
• @ydbjs/query
• @ydbjs/coordination
• @ydbjs/value
• @ydbjs/api
• @ydbjs/error
• @ydbjs/auth
• @ydbjs/retry

Project docs:

• Releasing
• Versioning
• Contributing

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Examples

Examples

• Parameterized query:

import { Int64, Optional, PrimitiveType } from '@ydbjs/value'
const sql = query(driver)
await sql`SELECT ${new Optional(new Int64(100n), new PrimitiveType('INT64'))};`

– Transactions:

await sql.begin(async (tx, signal) => {
  await tx`INSERT INTO users (id, name) VALUES (1, 'Alice')`
  await tx`UPDATE users SET name = 'Bob' WHERE id = 1`
})

– Error handling:

import { YdbError } from '@ydbjs/error'
try {
  await sql`SELECT * FROM non_existent_table`
} catch (e) {
  if (e instanceof YdbError) {
    console.error('YDB Error:', e.message)
  }
}

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AI Assistant Configuration

For projects using YDB SDK, you can configure AI assistants (GitHub Copilot, Cursor, etc.) to generate secure YQL code.

Multiple example configuration files are provided in packages/query/ai-instructions/:

• .cursorrules.example - Cursor AI instructions
• .instructions.example.md - General AI assistant guidelines
• .copilot-instructions.example.md - GitHub Copilot specific
• .ai-instructions.example.md - Alternative general format

Copy the appropriate file to your project root to enable secure AI code generation that follows YDB security best practices.

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FAQ

• Add a new service? Use @ydbjs/api for gRPC definitions.
• Work with YDB types? Use @ydbjs/value.
• Implement retries? Use @ydbjs/retry.
• More examples? See package docs, local examples, or explore ydb-js-examples repository with comprehensive real-world examples.

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Developer Guide

• Build: npm run build
• Test (all): npm test
• Lint: npm run lint