We are using the latest Structure v7.0.0 plugin for providing an overview of our features in a structure. I have added a custom column called "Check", that outputs "OK" or "NOK" to indicate whether certain criteria of the issues children are met, and in some cases it outputs a blank string ("").
I can easily create a custom transformation to either filter for the OK, NOK or "" in that custom column.
However, I fail to create a filter that queries for "OK and not empty" - in one single filter.
I've read the documentation over and over, and although I am rather firm with JQL, I could not really figure it out. I tried defining the filter with both JQL / S-JQL and I just could not come up with the correct syntax.