[GitHub] [hive] zhangbutao commented on pull request #4058: HIVE-27077: Upgrade to Antlr4

["zhangbutao (via GitHub)" <gi...@apache.org>]

zhangbutao commented on PR #4058:
URL: https://github.com/apache/hive/pull/4058#issuecomment-1501487075

   Antlr3 has been lost support long long ago. It will be great to upgrade to Antlr4. Antrl4 grammar is more simple and cleaner than Antlr3. 
   But i think it is not easy to do this, there is maybe some Incompatibilities need to be fixed.
   Please see this ticket: https://issues.apache.org/jira/browse/HIVE-23177
   @mlorek Could you please give more feadback? Thanks.


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