Hello Julian!
Around the time I've submitted that patch I've only pushed it to branch-2 and
branch-3.
I wasn't thinking about also putting it on branch-2.3 and branch-3.1.. if I
would have been; it would been already out...
I've just pushed it to branch-2.3 and branch-3.1 so if there will be a
HIVE-18624 [1] is a serious performance bug in the SQL parser. It causes parse
times that are literally exponential in the number of parentheses in the
expression, thus parsing of a query that has complex expressions may take
minutes or not terminate. According to JIRA, the bug was fixed on 2.4.
