Pengcheng Xiong created HIVE-14872:
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Summary: Deprecate the configuration
HIVE_SUPPORT_SQL11_RESERVED_KEYWORDS
Key: HIVE-14872
URL: https://issues.apache.org/jira/browse/HIVE-14872
Project: Hive
Issue Type: Sub-task
Reporter: Pengcheng Xiong
Assignee: Pengcheng Xiong
The main purpose for the configuration of HIVE_SUPPORT_SQL11_RESERVED_KEYWORDS
is for backward compatibility because a lot of reserved key words has been used
as identifiers in the previous releases. We already have had several releases
with this configuration. Now when I tried to add new set operators to the
parser, ANTLR is always complaining "code too large". I think it is time to
remove this configuration. (1) It will simplify the parser logic and largely
reduce the size of generated parser code; (2) it leave space for new features,
especially those which require parser changes.
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