jOOQ can effectively extend the type system of Java to the construction of ad-hoc queries by way of code generation. jOOQ generates Java classes that correspond to the database schema, which can be used in its query building DSL.

For example, if I have a `timestamp with time zone` column in PostgreSQL, that is represented in the generated code. I will be prevented from inserting a Java `String` into that column - I will have to provide an `OffsetDateTime`. (This is how it would be in a typical configuration - it is flexible enough to do pretty much anything).

Another example, let's say I reference some column in a query in one of my feature branches. Meanwhile, somebody has dropped that column on the master branch. When I rebase my feature branch onto master, my build will fail.