Support TOKEN function for partition keys. At least basic operators(=,<,>)

@doanduyhai hi! appreciate your work

Can’t find how can i use Cassandra native TOKEN function for partition keys(and maybe for clustering too). For example i need to build select statement like this(https://docs.datastax.com/en/cql/3.1/cql/cql_using/paging_c.html):

SELECT * FROM customers WHERE TOKEN(id) > TOKEN(a98d0f15-aad2-4a50-94b6-8aa4e2ede079);

But i see only 3 available options in DSL:

customerManager.dsl().select().allColumns_FromBaseTable().where().id().Eq()
customerManager.dsl().select().allColumns_FromBaseTable().where().id().Eq_FromJson()
customerManager.dsl().select().allColumns_FromBaseTable().where().id().IN()

We have 2 options here:

1. Add Token call as different Relation:

customerManager.dsl().select().allColumns_FromBaseTable().where().idToken().Eq()
customerManager.dsl().select().allColumns_FromBaseTable().where().idToken().Gt()
...

1. Add “token” method to “id” relation:

customerManager.dsl().select().allColumns_FromBaseTable().where().id().token().Eq()
customerManager.dsl().select().allColumns_FromBaseTable().where().id().token().Gt()
...

@doanduyhai can you point me out to class where i can implement it? Is it SelectWhereDSLCodeGen class? And what is the best option to do it?

[doanduyhai]

So I need to add support for GROUP BY clause recently available in latest Cassandra version and after that we’re good for another release

There is also a project to write a comprehensive contributor guide that explains all the internal architecture of Achilles so that makes life easier for external contributors.

[vrudikov]

So here is my first attempt. Need to finish a lot from your guide above. But i’m on the right way

Here is my entity:

@Table(table = "simple_entity")
public class SimpleEntity {

    @PartitionKey
    private Long id;

    @PartitionKey(2)
    private String second;
}