[jira] [Created] (HIVE-21742) Vectorization: CASE result type casting

["Gopal V (JIRA)" <ji...@apache.org>]

Gopal V created HIVE-21742:
------------------------------

             Summary: Vectorization: CASE result type casting
                 Key: HIVE-21742
                 URL: https://issues.apache.org/jira/browse/HIVE-21742
             Project: Hive
          Issue Type: Bug
          Components: Logical Optimizer, Vectorization
    Affects Versions: 3.1.1
            Reporter: Gopal V


{code}
create temporary table foo(q548284 int);
insert into foo values(1),(2),(3),(4),(5),(6);
select q548284, CASE WHEN ((q548284 = 1)) THEN (0.2) WHEN ((q548284 = 2)) THEN (0.4) WHEN ((q548284 = 3)) THEN (0.6) WHEN ((q548284 = 4)) THEN (0.8) WHEN ((q548284 = 5)) THEN (1) ELSE (null) END from foo order by q548284 limit 1;
{code}

Fails with 

{code}
Caused by: java.lang.ClassCastException: org.apache.hadoop.hive.ql.exec.vector.LongColumnVector cannot be cast to org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector
        at org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector.setElement(DecimalColumnVector.java:130)
        at org.apache.hadoop.hive.ql.exec.vector.expressions.IfExprColumnNull.evaluate(IfExprColumnNull.java:101)
{code}

This gets fixed if the case return of (1) is turned into a (1.0).



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)