[ https://issues.apache.org/jira/browse/FLINK-952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Till Rohrmann reassigned FLINK-952: ----------------------------------- Assignee: (was: Till Rohrmann) > TypeExtractor requires the argument types of the UDF to be identical to the > parameter types > ------------------------------------------------------------------------------------------- > > Key: FLINK-952 > URL: https://issues.apache.org/jira/browse/FLINK-952 > Project: Flink > Issue Type: Bug > Components: Local Runtime > Reporter: Till Rohrmann > > The TypeExtractor checks for each operation whether the DataSet element types > are valid arguments for the UDF. However, it checks for strict equality > instead of a subtype relationship. Thus the following computation would not > work even though it should semantically be correct. > DataSet[B].map(new MapFunction[A,A](){ A map(A x)}) with B being a sub class > of A. -- This message was sent by Atlassian JIRA (v6.3.4#6332)