I am looking it a weird issue where I am trying to fix one of the panels in a dashboard, The panel has a query like below index=<index> sourcetype=log4j host=$host$ <Extracted field> != NULL | timechart span=1m count by <Extracted field> issue is we are getting inaccurate counts as this part "<Extracted field> != NULL" in the above query is filtering out majority of the events, and when we are trying to see which events are filtered by using "<Extracted field> = NULL" we are not seeing any events. How does splunk treat extracted fields which are NULL or in what situations these fields end up as NULL. Any suggestions for the above issue? Thanks in advance!
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