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Issues with Component set to None don't appear in search

Andrew Pratt

When a user was searching with the following filter, issues with no component values set did not appear in the search results. Any idea why?

project = XYZ AND component != "ABCDEF" AND status != Closed ORDER BY key DESC

where ABCDEF is a component in project XYZ.

By "no component values set", I mean the Component was blank or None.

Accepted answers

Paul Alexander

Andrew, I've always stacked to the get nulls returned; so,

project = XYZ AND component != "ABCDEF" AND status != Closed OR project = XYZ AND component is empty AND status != Closed ORDER BY key DESC

All comments

Paul Alexander

Andrew, I've always stacked to the get nulls returned; so,

project = XYZ AND component != "ABCDEF" AND status != Closed OR project = XYZ AND component is empty AND status != Closed ORDER BY key DESC

Andrew Pratt

Perfect. I shortened it to the following:

project = ABC AND (component != "ABCDEF" or Component is empty) and status != Closed ORDER BY Key DESC

and this seems to work as well.

But I still don't understand entirely why we have to add the "Component is empty" part. Something to do with databases and nulls versus empty strings in a query?

Andrew Pratt

Thanks. Appreciate the quick answer.

Paul Alexander

Yup, you must explicitly find nulls using the keyword, 'empty' or 'null'.

https://confluence.atlassian.com/display/AOD/Advanced+Searching#AdvancedSearching-EMPTY

Nic Brough -Adaptavist-

It's not just because the database works that way, it's because the world works that way and a database reflects it.

Think of the question "what colour is your cat?". Possible answers might be tortoiseshell, ginger, black, and grey, so you can ask select questions like "show me all the cats that are not ginger". But "I don't have a cat" is also an answer, and one that should clearly not show up in a select question.

In logical terms, "null" is something different from "yes" or "no" and needs to be handled clearly and distinctly.

Andrew Pratt

Thanks Nic. I love your clear example.

Of course, this means I can't blame data base programers any more.

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