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https://issues.apache.org/jira/browse/HIVE-28815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krisztian Kasa resolved HIVE-28815.
-----------------------------------
Fix Version/s: 4.1.0
Resolution: Fixed
Merges to master. Thanks [~soumyakanti.das] for the patch.
> Primitive common category for String and Boolean returns null causing NPE
> -------------------------------------------------------------------------
>
> Key: HIVE-28815
> URL: https://issues.apache.org/jira/browse/HIVE-28815
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 4.0.1
> Reporter: Soumyakanti Das
> Assignee: Soumyakanti Das
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.1.0
>
>
> If we run the following, the second select statement causes an NPE because of
> the boolean column.
> {noformat}
> create table boolarray1(id int, txt string, num int, flag string);
> create table boolarray2(id int, txt string, num int, flag boolean);
> insert into boolarray1 values
> (1, 'one', 5, 'FALSE'),
> (2, 'two', 14, 'TRUE'),
> (3, NULL, 3, 'FALSE');
> insert into boolarray2 values
> (1, 'one', 5, 'FALSE'),
> (2, 'two', 14, 'TRUE'),
> (3, NULL, 3, 'FALSE');
> select array(*) from boolarray1;
> select array(*) from boolarray2;{noformat}
> For the first table, the common category for all four columns is a String.
> For the second table, common category for the first three columns is a
> String, but when we try to compute common category of String and Boolean we
> get a null from
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java#L1179]
>
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