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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