How can i filter for Parent Issues who never have SubTask

[Christian Boni]

How can i filter for Parent Issues who never have SubTask
e.g I have over 8000 issues in my Project, Issues with SubTask and some without SubTask.

Filter: Parents Issues without subtask it means Parent Issues which never have child.

[Niclas Sandstroem]

I'm quite sure you need a plugin for this. See  https://answers.atlassian.com/questions/38070845

https://scriptrunner.adaptavist.com/4.3.9/jira/jql-functions.html#_hassubtasks

Good luck!