How i can reused/compose part of a JOOQ query in a repository method?

With a JOOQ DSLContext variable ctx I have a method to select all relationship data.

 open fun selectAllSomethings(id: String): List<SomeDto> = ctx
    .select(..), 
    .from(..)
    .join(..)
    .leftJoin(...)
    .fetch()
    .map()

And I need to reused this logic with an add method where for a concrete id I want to change the code to use fetchOne and map. How can I reuse the first part of query and share it between both methods? This part:

ctx.select(..), 
    .from(..)
    .join(..)
    .leftJoin(...)

Is it necessary to divide this into two different methods? Or need to add an if ?