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From "Aaron Tokhy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-12474) ORDER BY should handle column refs in parantheses
Date Thu, 19 Nov 2015 23:48:11 GMT
Aaron Tokhy created HIVE-12474:
----------------------------------

             Summary: ORDER BY should handle column refs in parantheses
                 Key: HIVE-12474
                 URL: https://issues.apache.org/jira/browse/HIVE-12474
             Project: Hive
          Issue Type: Bug
          Components: Parser
    Affects Versions: 1.2.1, 1.0.0
            Reporter: Aaron Tokhy
            Assignee: Pengcheng Xiong
            Priority: Minor


CREATE TABLE test(a INT, b INT, c INT)
COMMENT 'This is a test table';

hive>
select lead(c) over (order by (a,b)) from test limit 10;
FAILED: ParseException line 1:31 missing ) at ',' near ')'
line 1:34 missing EOF at ')' near ')'

hive>
select lead(c) over (order by a,b) from test limit 10;

- Works as expected.

It appears that 'cluster by'/'sort by'/'distribute by'/'partition by' allows this:
https://github.com/apache/hive/blob/release-1.2.1/ql/src/java/org/apache/hadoop/hive/ql/parse/IdentifiersParser.g#L129

For example, this syntax is still valid:
select lead(c) over (sort by (a,b)) from test limit 10;



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