SchemaFree

An embedded, schema-free, multi-modal database for node.js. Supports graph queries and sql queries. Persistence uses Google's leveldb. See sample.js for more information. Built for discussion purposes.

Getting Started

1. npm install schemafree
2. let db = require('schemafree')()
3. Review sample.js for a quick demo and to check everything is working
4. If you want to play with it in the Node REPL then await-outside might make things easier.

Api

The api is very short. The source is very short too. At this stage the best place to learn about the package is via sample.js.

• db.set to store a entity in the database
• db.unset to remove a entity from the database
• db.link to link two entities
• db.unlink to unlink two entities
• db.search to get an entity from the database using a predicate function
• db.query to run a sql query against the database
• db.walk to run a graph traversal

Queries

The query() function supports almost all of SQL-99 including temp tables, all join types, rollup, cube, and grouping sets, In addition it supports use of a new 'link' statement which makes traversal of many-to-many relationship tables cleaner. See sample.js for more information.

The search() function provides a simple way to quickly grab any entity from the database using a javascript function. To get all person entities who with the firstname "Barry" simple type db.search(person => person.firstname == "Barry").

The walk() function offers a fluid syntax for quickly traversing stored data like a graph. Available steps are all(), group(), map(), filter(), label(), and loop().

Version History

• 0.2 Initial release
• 0.3 Implemented db.unlink. Implemented the sql link shorthand. Bug fixes.
• 0.4 Finished implementing the full suite of walk() functions. Untested.

High Level Todos

• Write tests
• Write documentation
• Discuss performance optimisations