hequn8128 commented on a change in pull request #9865: [FLINK-14212][python]
Support no-argument Python UDFs.
URL: https://github.com/apache/flink/pull/9865#discussion_r333860456
##########
File path:
flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/plan/ExpressionReductionRulesTest.scala
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@@ -510,3 +528,14 @@ object DeterministicNullFunc extends ScalarFunction {
def eval(): String = null
override def isDeterministic = true
}
+
+object MockedPythonUDFWithoutArguments extends ScalarFunction {
+
+ override def getLanguage: FunctionLanguage = FunctionLanguage.PYTHON
+
+ def eval(): Long = {
Review comment:
Simplify the eval to `def eval(): Long = 1L` directly? and change the class
name to `DeterministicPythonFunc`.
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