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https://issues.apache.org/jira/browse/HIVE-14872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Gates updated HIVE-14872:
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Hadoop Flags: Incompatible change
> Remove 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
> Components: Parser
> Affects Versions: 2.1.0
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Labels: TODOC2.2
> Fix For: 2.2.0
>
> Attachments: HIVE-14872.01.patch, HIVE-14872.02.patch
>
>
> 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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