(sql/update! ds
                           :my-table
                           {:started-at (Instant/now)}
                           {:id         id}
                           {:column-fn  csk/->snake_case
                            :table-fn   csk/->snake_case
                            :builder-fn rs/as-unqualified-kebab-maps})

#:next.jdbc{:update-count 0}

@ashwinbhskr I'm not sure what you're asking here?

What do you expect to be returned here? An UPDATE statement returns the number of rows affected.

> What do you expect to be returned here? An `UPDATE` statement returns the number of rows affected. true, I should I have been clearer with my question. I meant to ask why does it return a namespaced key word? instead of just {:update-count 0}

As the docs make clear, the "fake" result set returned in this case is not affected by the builder fn you specify.