I just found out recently, that a filter did not show many issues as espected.
This costed my company some grief and me a log of explaning and support, both internal and towards Atlassian.
Bug Report: https://jira.atlassian.com/browse/JRASERVER-67177
Please vote for this, I think its critically for all JIRA Admins/Users - that issues does not show up in a filter as expected.
Thanks for the links, Francis !
Well Atlassian closed the Issue with:
"Hello all,
This kind of behaviour is present for multiple JQL cases e.g. custom fields, labels, projects and is an expected, designed behaviour hence this issue will not be considered a bug.
Cheers,
Pawel, Jira Developer"
, and though I am disappointed, I have learnt now that:
PROJECT = CUSTOMER1
will return all issues, where as
PROJECT = CUSTOMER1 AND Classification not in ("Patch Management")
needs to be written as
AND Classification AND (Classification not in ("Patch Management") OR classification is empty)
to actually show all issues where "Patch Management" is not a value for the Classification Field . So It seems for every negation on fields and labels etc, EMPTY need to be taken in account.