Jingsong Lee created FLINK-11951:
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Summary: Enhance UserDefinedFunction interface to allow more user
defined types
Key: FLINK-11951
URL: https://issues.apache.org/jira/browse/FLINK-11951
Project: Flink
Issue Type: Improvement
Reporter: Jingsong Lee
Assignee: Jingsong Lee
1.Allow UDF & UDTF to access constant parameter values at getReturnType, see
similar feature in hive:
[https://hive.apache.org/javadocs/r2.2.0/api/org/apache/hadoop/hive/ql/udf/generic/GenericUDF.html#initializeAndFoldConstants-org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector:A-]
2.Allow AggregateFunction to decide its user define inputs types with
argClasses.
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