cloud-fan commented on code in PR #42661:
URL: https://github.com/apache/spark/pull/42661#discussion_r1306864355


##########
sql/core/src/test/resources/sql-tests/inputs/try_reflect.sql:
##########
@@ -0,0 +1,19 @@
+-- positive
+SELECT try_reflect("java.util.UUID", "fromString", 
"a5cf6c42-0c85-418f-af6c-3e4e5b1328f2");
+SELECT try_reflect("java.lang.String", "valueOf", 1);
+SELECT try_reflect("java.lang.Math", "max", 2, 3);
+SELECT try_reflect("java.lang.Math", "min", 2, 3);
+SELECT try_reflect("java.lang.Integer", "valueOf", "10", 16);
+
+-- negative

Review Comment:
   does it really matter to put so many similar tests? I'd like to think more 
about the test coverage:
   - runtime errors
   - non-existing methods
   - non-existing class
   - invalid invocation (`try_reflect()` with no arg), since I caught 
https://github.com/apache/spark/pull/42661/files#r1306863750



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