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https://issues.apache.org/jira/browse/HIVE-21742?focusedWorklogId=252147&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-252147
]
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_r289582787
##########
File path: ql/src/test/results/clientpositive/perf/spark/query80.q.out
##########
@@ -782,7 +782,7 @@ STAGE PLANS:
1 Map 33
Statistics: Num rows: 231917759 Data size: 31534108438 Basic
stats: COMPLETE Column stats: NONE
Select Operator
- expressions: _col15 (type: string), _col5 (type:
decimal(7,2)), CASE WHEN (_col9 is not null) THEN (_col9) ELSE (0) END (type:
decimal(12,2)), (_col6 - CASE WHEN (_col10 is not null) THEN (_col10) ELSE (0)
END) (type: decimal(13,2))
+ expressions: _col15 (type: string), _col5 (type:
decimal(7,2)), CASE WHEN (_col9 is not null) THEN (_col9) ELSE (CAST( 0 AS
decimal(7,2))) END (type: decimal(7,2)), (_col6 - CASE WHEN (_col10 is not
null) THEN (_col10) ELSE (CAST( 0 AS decimal(7,2))) END) (type: decimal(8,2))
Review comment:
Interesting case change, why is it not 12,2 or 13,2?
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Issue Time Tracking
-------------------
Worklog Id: (was: 252147)
Time Spent: 1h 10m (was: 1h)
> 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 10m
> 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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