JQL question.

[Kirill Abgarian]

Is it possible to create JQL statement to select all epics with label 'Y', including all their children (stories/tasks) from project X?

Label 'Y' is applied only to epics, linked stories and tasks don't have it.

[Jesse Kona · Accepted solution]

You need an app (like JQL Search Extensions) to do this. 

With the app, this search would work:

(issue in childrenOfIssuesInQuery("type = epic and labels = Y and project = X")) OR (type = epic and labels = Y and project = X)

[Kirill Abgarian]

Thank you Jesse, good to know.  As the first step I'd like to understand how close I can get to my use case with standard Jira features.  Will start considering additional apps if there is no workable jql solution.

[Jesse Kona]

Without an app, you can certainly return the children of an epic using the parentEpic field:

parentEpic = PROJ-411

However, you can only do it by using the epic's key.  I hope this helps.