Github user paul-rogers commented on the issue: https://github.com/apache/drill/pull/1150 @Ben-Zvi, the changes look right. Old style was to have a "buildFoo" method for the nested structure "foo". The new style is to have a "resumeBar" method for the outer structure "bar". If you have trouble, an alternative is to commit @ppadma's PR. Then I can immediately rebase and make the required fixes to her tests.