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Posted to issues@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2016/10/12 04:06:20 UTC
[jira] [Commented] (HIVE-14872) Remove the configuration
HIVE_SUPPORT_SQL11_RESERVED_KEYWORDS
[ https://issues.apache.org/jira/browse/HIVE-14872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15567489#comment-15567489 ]
Ashutosh Chauhan commented on HIVE-14872:
-----------------------------------------
+1
> 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
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> 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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