QDB4

QDB is a synchronous database module reliant on JavaScript object-documents with multiple levels of optimisation built into it.

Features

• Non-blocking;
• Optimised memory cache;
• Schema objects and automatic migration;
• Selection and transaction wrappers;
• Connection pools with external thread support.

Links

• Documentations
• Github

Installation

npm install QSmally/QDB

const QDB = require("qdatabase");
// ...

Usage

Connection

The main interface for interacting with QDB.

const service = new QDB.Connection(path, options?);

Transaction

A SQL transaction manager.

// Instantiates a transaction within the database. It is required
// to call 'commit' or 'rollback' on the returned Transaction.
const transaction = service.transaction();

// Perform changes in the connection...
transaction.commit(); // or
transaction.rollback();

Selection

An unchanged piece of the database in memory.

// Aggregate with certain instructions, like joining tables,
// ordering them and regrouping them by a property.
const users = service.select()
    .join(projects, "UserId", "Projects")
    .order(user => Object.keys(user.Projects).length, QDB.descending)
    .group("Rank");

QDB Shell

The library integrates a CLI for interacting with QDB deployments.

npm install -g QSmally/QDB

$ qdb make Instances.qdb
$ qdb Development.qdb create Users
$ qdb Production.qdb vacuum

This module is licensed under Apache 2.0.