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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-7291) Incorrect return value of getArity() in ListTypeInfo and MapTypeInfo
Date Fri, 28 Jul 2017 12:20:01 GMT
Fabian Hueske created FLINK-7291:
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             Summary: 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: Core
    Affects Versions: 1.3.1, 1.4.0
            Reporter: Fabian Hueske


The implementation of {{getArity()}} in {{ListTypeInfo}} and {{MapTypeInfo}} returns 0 but
should return 1.

The JavaDocs of {{TypeInformation.getArity()}} 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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