ydb/yt/yql/tests/sql/suites/insert/udf_empty.sql

/* postgres can not */
-- kikimr only: pragma kikimr.UnwrapReadTableValues = "false"; create table plato.Output (key varchar null, subkey varchar null, value varchar null, primary key (key)); commit;
insert into plato.Output(key, subkey, value) values (SimpleUdf::ReturnNull(""), SimpleUdf::ReturnVoid(""), coalesce(SimpleUdf::ReturnEmpty(""), "!"));