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https://issues.apache.org/jira/browse/HIVE-3530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469160#comment-13469160
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Namit Jain commented on HIVE-3530:
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[~zhenxiao], can you take a look if possible ?
> warnings in Hive.g
> ------------------
>
> Key: HIVE-3530
> URL: https://issues.apache.org/jira/browse/HIVE-3530
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
>
> Building Grammar
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g
> ....
> ANTLR Parser Generator Version 3.0.1 (August 13, 2007) 1989-2007
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:578:5:
> Decision can match input such as "Identifier KW_RENAME KW_TO" using multiple
> alternatives: 1, 10
> As a result, alternative(s) 10 were disabled for that input
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:1607:5:
> Decision can m
> atch input such as "Identifier DOT Identifier" using multiple alternatives:
> 1, 2
> As a result, alternative(s) 2 were disabled for that input
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:1823:5:
> Decision can match input such as "KW_ORDER KW_BY LPAREN" using multiple
> alternatives: 1, 2
> As a result, alternative(s) 2 were disabled for that input
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:1836:5:
> Decision can match input such as "KW_CLUSTER KW_BY LPAREN" using multiple
> alternatives: 1, 2
> As a result, alternative(s) 2 were disabled for that input
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:1848:5:
> Decision can match input such as "KW_DISTRIBUTE KW_BY LPAREN" using multiple
> alternatives: 1, 2
> As a result, alternative(s) 2 were disabled for that input
> warning(200):
> /Users/njain/hive/hive3/ql/src/java/org/apache/hadoop/hive/ql/parse/Hive.g:1859:5:
> Decision can match input such as "KW_SORT KW_BY LPAREN" using multiple
> alternatives: 1, 2
> As a result, alternative(s) 2 were disabled for that input
> Most of these seem to be due to HIVE-1367
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