I've created a tiny library which improves performance for GraphQL + Knex.

tl;dr

Before

After

• Filter select columns based on a query from clients
• Load relations without N+1 problem (pagination available!)

Currently only PostgreSQL is supported, but I'll support other RDBMS too if needed.

Motivation

Creating a GraphQL service with a Relational Database is a hard thing. We should take care of:

• Performance for querying relations. N+1 problem will happen if you don't use Dataloader.
• select * make your server slow, but hard to filter columns based on requests.
• Pagination. Dataloader pattern is hard to implement pagination without a hacky union or window functions. knex-graphql-utils uses row_number() window function to do it.

As a developer, I noticed that I'm doing the same thing again and again - so I convert my work into a library.

The syntax is like this:

Please try it! Any feedback is welcome.