[FLINK-22451] Support (*) as parameter of table UserDefinedFunction - ASF JIRA

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For now, one can use star (*) to act as a wild card, selecting all of the columns in the table.

Table result = orders.select($("*"));

When one use a star (*) as parameter of an UDF, it will fail ReferenceResolverRule in on

"Cannot resolve field [*], input field list:[...]."

The cause is that, the parameter of an UDF is not expanded in StarReferenceFlatteningRule

I think we can support to expand the star parameter to the real fields list if it is the only parameter(the last parameter is also ok) of the UDF.

then the parameters can be received by

eval(@DataTypeHint(inputGroup = InputGroup.ANY) Object... row)

links to

GitHub Pull Request #15768