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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13084) Vectorization throws exception where there is case statement in group by
Date Thu, 18 Feb 2016 08:15:18 GMT
Rajesh Balamohan created HIVE-13084:
---------------------------------------

             Summary: Vectorization throws exception where there is case statement in group
by
                 Key: HIVE-13084
                 URL: https://issues.apache.org/jira/browse/HIVE-13084
             Project: Hive
          Issue Type: Bug
          Components: Vectorization
            Reporter: Rajesh Balamohan
            Assignee: Matt McCline


When there is case statement in group by, hive throws unable to vectorize exception.

e.g query just to demonstrate the problem

{noformat}


explain select l_partkey, case when l_commitdate between '2015-06-30' AND '2015-07-06' THEN
'2015-06-30' END as wk from lineitem_test_l_shipdate_ts group by l_partkey, case when l_commitdate
between '2015-06-30' AND '2015-07-06' THEN '2015-06-30' END;

org.apache.hadoop.hive.ql.metadata.HiveException: Could not vectorize expression: org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc


Vertex dependency in root stage
Reducer 2 <- Map 1 (SIMPLE_EDGE)

Stage-0
  Fetch Operator
    limit:-1
    Stage-1
      Reducer 2
      File Output Operator [FS_7]
        Group By Operator [GBY_5] (rows=888777234 width=108)
          Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
        <-Map 1 [SIMPLE_EDGE]
          SHUFFLE [RS_4]
            PartitionCols:_col0, _col1
            Group By Operator [GBY_3] (rows=1777554469 width=108)
              Output:["_col0","_col1"],keys:_col0, _col1
              Select Operator [SEL_1] (rows=1777554469 width=108)
                Output:["_col0","_col1"]
                TableScan [TS_0] (rows=1777554469 width=108)
                  rajesh@lineitem_test_l_shipdate_ts,lineitem_test_l_shipdate_ts,Tbl:COMPLETE,Col:NONE,Output:["l_partkey","l_commitdate"]
{noformat}

\cc [~mmccline], [~gopalv]



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