DortDB

Modular architecture

The core, each language, and each extension is a separate package, so a browser bundle ships only what you actually import.

Pluggable query languages

SQL, Cypher, and XQuery come in the box, one for each major data model, and query languages are plug-ins you can add yourself.

Multi-language queries

Embed one language inside another with a LANG block. The whole query compiles to a single, optimized plan.

Extensible & schema-free

Add your own optimizer rules, index types, functions, and data adapters, all over plain in-memory values that register in constant time.

One query, many languages

Every language lowers to the same algebra, so a LANG block is not an opaque call to another engine. It becomes part of one plan the optimizer reasons about as a whole, letting you express each part of a cross-model query in the language that fits it best. Here SQL filters users by a count computed with XQuery over an XML document.

SELECT name, age
FROM users
WHERE age > 30 AND (
  LANG xquery
  fn:count($invoices/customer[. = $users:name])
) > 5