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Posted to issues@flink.apache.org by "Timo Walther (Jira)" <ji...@apache.org> on 2020/01/15 10:35:00 UTC

[jira] [Created] (FLINK-15600) Further relax the UDF constraints for Java classes

Timo Walther created FLINK-15600:
------------------------------------

             Summary: Further relax the UDF constraints for Java classes
                 Key: FLINK-15600
                 URL: https://issues.apache.org/jira/browse/FLINK-15600
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


FLINK-12283 already relaxed the UDF constraints for classes which is a big usability improvement for Scala users. However, Java users are still facing issues when using anonymous inner classes.

We should allow the following:
{code}
tEnv.registerFunction("testi", new ScalarFunction() {
	public String eval(Integer i) {
		return String.valueOf(i);
	}
});
{code}



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