I see in the release notes for HIVE -3979
[HIVE-3979 <https://issues.apache.org/jira/browse/HIVE-3979>] - Provide
syntax for unescaped regex on rlike, and other regexp_* functions
Yet when I click on that JIRA there are not notes etc. Could it be that
this was included by mistake? I am curious, if this isn't a mistake, how
this was implemented.