Why searching for empty custom field is not returning all issues it should

Jaime C.

Hello

Recently I added an optional custom text field for my project and searching for issues with it empty is not returning all issues. JIRA version 5.2.2

 

Lets say I am working with a base JQL that returns 688 issues.

If to that base JQL I add "and customfield is empty" I get 0 issues.

If to that base JQL I add "and customfield is not empty" I get 210 issues.

 

So what is going on with the remaining 478 issues?

For reference I tried referring to the custom field in all the supported ways and my index is up to date. Could not find any bug report on this.

Udo Brand

Is this customfield in a context for a project or an issuetype? That would explain the differences. The 478 issues would have a context where the custom field is not defined for.