David Mollitor created HIVE-23177:
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Summary: Upgrade to ANTLR4
Key: HIVE-23177
URL: https://issues.apache.org/jira/browse/HIVE-23177
Project: Hive
Issue Type: Improvement
Reporter: David Mollitor
Upgrade Hive to ANTL4, ANTLR3 lost support many moons ago.
This is going to be a big lift. Many of the Hive rules use the "rule rewrite"
feature which no longer exists in ANLTR4 and it must be completely
re-implemented:
https://stackoverflow.com/questions/14565794/antlr-4-tree-inject-rewrite-operator
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