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Posted to issues@flink.apache.org by "Robert Metzger (JIRA)" <ji...@apache.org> on 2019/02/28 13:06:00 UTC

[jira] [Updated] (FLINK-7291) Incorrect return value of getArity() in ListTypeInfo and MapTypeInfo

     [ https://issues.apache.org/jira/browse/FLINK-7291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Metzger updated FLINK-7291:
----------------------------------
    Component/s:     (was: Core)
                 API / Type Serialization System

> Incorrect return value of getArity() in ListTypeInfo and MapTypeInfo
> --------------------------------------------------------------------
>
>                 Key: FLINK-7291
>                 URL: https://issues.apache.org/jira/browse/FLINK-7291
>             Project: Flink
>          Issue Type: Bug
>          Components: API / Type Serialization System
>    Affects Versions: 1.3.1, 1.4.0
>            Reporter: Fabian Hueske
>            Priority: Major
>
> The implementation of {{getArity()}} in {{ListTypeInfo}} and {{MapTypeInfo}} returns 0 but should return 1.
> The implementation of {{MapTypeInfo.getTotalFields()}} is also incorrect and must return 1 instead of 2.
> The JavaDocs of {{TypeInformation.getArity()}} and {{TypeInformation.getTotalFields()}} should be extended as well to avoid future confusion about this method. The method returns the arity for current type. For atomic types, this is 1 for composite types, the number of non-nested fields (or number of fields on the first nesting-level).



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