title: How to do "where not exists" type filtering in Kibana/ELK?
body: <p>I am using ELK to create dashboards from my log files. I have a log file with entries that contain an id value and a "success"/"failure" value, displaying whether an operation with a given id succeeded or failed. Each operation/id can fail an unlimited number of times and succeed at most once. In my Kibana dashboard I want to display the count of log entries with a "failure" value for each operation id, but I want to filter out cases where a "success" log entry for the id exists. i.e. I am only interested in operations that never succeeded. Any hints for tricks that would achieve this?</p>