Is there any type category to be used in JQL similar to statusCategory and projectCategory fields?

[Tiago Cardoso]

When you have a big Jira instance with several customisations, it's really handy to run JQL based on statusCategory or  (project) Category (interesting enough, I couldn't find a document reference for this JQL parameter, although I'm using it).

It'd be nice if we could also search all issues in a given hierarchy, such as typeCategory. This isn't a problem for Epics (as it's highly advised to rename it to something else) but it could be useful to segregate between issues and sub-task issue types.

This way, we could have a JQL like

"typeCategory = sub-tasks" 

would return any issuetype considered a sub-task on a given context.

"typeCategory = issue" 

would return all issuetypes that are not sub-tasks nor epics

Is there something similar to this readily available?

[PeterAHanson]

It would be useful if we could search through every item in a particular hierarchy, such as type category. This isn't a problem for epics, even though renaming it is highly recommended. It would be beneficial to make a distinction between issue types and sub-task issue types.