I found better solution - simple and amazing plugin - https://marketplace.atlassian.com/plugins/eu.kprod.jira.stattable-searchers- adds additional searchers, including exact searchers - for custom fields.
It also makes it possible to use these fields as dimensions in 1- and 2-dimensional statistics gadgets on the dashboards.
You'll need to write a new searcher to do this. It should be a moderately simple plugin to write (not that I'm sure it's particularly useful).
Stuff on writing searchers is entwined with custom fields (As that's what they search) - see https://developer.atlassian.com/display/JIRADEV/Custom+Field+Plugin+Module
Hi all! Lauren here from the Enterprise Cloud marketing team. I have some exciting Cloud updates from #AtlassianSummit that I wanted to share. We want everyone in your organization to be ab...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs