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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-14872) Deprecate the configuration HIVE_SUPPORT_SQL11_RESERVED_KEYWORDS
Date Sat, 01 Oct 2016 03:46:20 GMT
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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