For example. I want to create a pie chart of all issues that have an epic defined and whose "roadmap" value is "2016-Q2" and partition by epic-time-remaining. Highly useful but currently not supported AFAIK by JQL. I can search overall, but "by roadmap" seems impossible for now.
project = FOO AND "Epic Link" is not EMPTY AND resolution = Unresolved ORDER BY <blah> ASC
Should be
project = FOO AND "Epic Link" is not EMPTY AND "Epic Roadmap"="2016-Q2" AND resolution = Unresolved ORDER BY <blah> ASC