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https://issues.apache.org/jira/browse/HIVE-21742?focusedWorklogId=252152&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-252152
]
ASF GitHub Bot logged work on HIVE-21742:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Jun/19 00:18
Start Date: 01/Jun/19 00:18
Worklog Time Spent: 10m
Work Description: t3rmin4t0r commented on pull request #656: HIVE-21742 :
Vectorization: CASE result type casting
URL: https://github.com/apache/hive/pull/656#discussion_r289582541
##########
File path:
ql/src/test/results/clientpositive/llap/multi_count_distinct_null.q.out
##########
@@ -73,7 +73,7 @@ STAGE PLANS:
outputColumnNames: _col0, _col1, _col2, _col3
Statistics: Num rows: 18 Data size: 1628 Basic stats: COMPLETE
Column stats: COMPLETE
Select Operator
- expressions: CASE WHEN (((_col3 = 3L) and _col0 is not
null)) THEN (1) ELSE (null) END (type: int), CASE WHEN (((_col3 = 5L) and _col1
is not null)) THEN (1) ELSE (null) END (type: int), CASE WHEN (((_col3 = 6L)
and _col2 is not null)) THEN (1) ELSE (null) END (type: int)
+ expressions: CASE WHEN (((_col3 = 3L) and _col0 is not
null)) THEN (1) ELSE (UDFToInteger(null)) END (type: int), CASE WHEN (((_col3 =
5L) and _col1 is not null)) THEN (1) ELSE (UDFToInteger(null)) END (type: int),
CASE WHEN (((_col3 = 6L) and _col2 is not null)) THEN (1) ELSE
(UDFToInteger(null)) END (type: int)
Review comment:
Cast not being constant folded?
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Issue Time Tracking
-------------------
Worklog Id: (was: 252152)
> 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
> Assignee: Vineet Garg
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21742.1.patch, HIVE-21742.2.patch,
> HIVE-21742.3.patch
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> {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).
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