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Posted to issues@hive.apache.org by "Alessandro Solimando (Jira)" <ji...@apache.org> on 2022/10/17 13:49:00 UTC
[jira] [Assigned] (HIVE-26643) HiveUnionPullUpConstantsRule fails when pulling up constants over nullable fields
[ https://issues.apache.org/jira/browse/HIVE-26643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alessandro Solimando reassigned HIVE-26643:
-------------------------------------------
> HiveUnionPullUpConstantsRule fails when pulling up constants over nullable fields
> ---------------------------------------------------------------------------------
>
> Key: HIVE-26643
> URL: https://issues.apache.org/jira/browse/HIVE-26643
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 4.0.0-alpha-2
> Reporter: Alessandro Solimando
> Assignee: Alessandro Solimando
> Priority: Major
>
> The rule does pull up constants without checking/adjusting nullability to match that of the field type.
> Here is the stack-trace when a nullable type is involved:
> {code:java}
> java.lang.AssertionError: Cannot add expression of different type to set:
> set type is RecordType(JavaType(class java.lang.Integer) f1, JavaType(int) NOT NULL f2) NOT NULL
> expression type is RecordType(JavaType(int) NOT NULL f1, JavaType(int) NOT NULL f2) NOT NULL
> set is rel#38:HiveUnion.(input#0=HepRelVertex#35,input#1=HepRelVertex#35,all=true)
> expression is HiveProject(f1=[1], f2=[$0])
> HiveUnion(all=[true])
> HiveProject(f2=[$1])
> HiveProject(f1=[$0], f2=[$1])
> HiveFilter(condition=[=($0, 1)])
> LogicalTableScan(table=[[]])
> HiveProject(f2=[$1])
> HiveProject(f1=[$0], f2=[$1])
> HiveFilter(condition=[=($0, 1)])
> LogicalTableScan(table=[[]])
> {code}
> The solution is to check nullability and add a cast when the field is nullable, since the constant's type is not.
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