how can i find all issues who has a subtask linked whose summary starts or is 'testing"?

[Ricardo Chan]

I am trying to create a filter that will help me to find only the defects/issues which has a subtask created and named i.e "Testing" 

so if i have 10 issues but only 5 have subtask created, i want to get those 5 issues assuming the subtask of these 5 are named Testing. 

Your help is very much appreciated. thanks.

[Udo Brand]

If you have scriptrunner installed you can use the parentsof jql function

issueFunction in parentsOf("summary~Testing")

see: https://jamieechlin.atlassian.net/wiki/display/GRV/Scripted+JQL+Functions#ScriptedJQLFunctions-parentsOf%28Subquery%29