Markus - Query language

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Markus is a query language created in 2020.

#2682on PLDB

4Years Old

Download source code:

git clone https://github.com/Markus-Studio/Markus

Source Code

A declarative (database) query language!

Tags: queryLanguage
Markus is developed on GitHub and has 2 stars
Early development of Markus happened in https://github.com/Markus-Studio
Markus is written in Rust, JSON, TOML, Markdown, JavaScript, Python, C, C++, Bourne shell, YAML

Example from the web:

type User: user {
  name: string;
}

type Task {
  owner: User;
  title: string;
  done: bool;
}

query myTasks() {
  is(Task),
  # %user is the current authenticated user.
  eq(.owner, %user)
}

action newTask($title: string) {
  create Task {
    user: %user,
    title: $title,
    done: false
  };
}

action toggleStatus($task: Task) {
  validate eq($task.owner, %user);

  update $task {
    .done: not(.done)
  };
}

action delete($task: Task) {
  validate eq($task.owner, %user);
  delete $task;
}

action edit($task: Task, $new_title: string) {
  validate eq($task.owner, %user);
  update $task {
    .title: $new_title
  };
}