Intermediate changes

commit_hash:8026b59c61f0972ec1704587621ad2bf4cf4b431

Author: robot-piglet

yt/yql/tests/sql/suites/ytflow/udf.cfg

@@ -0,0 +1,4 @@
+in Input input.txt
+out Output output.txt
+providers ytflow
+udf string_udf

yt/yql/tests/sql/suites/ytflow/udf.sql

@@ -0,0 +1,16 @@
+use plato;
+
+pragma Engine = "ytflow";
+
+pragma Ytflow.Cluster = "plato";
+pragma Ytflow.PipelinePath = "pipeline";
+
+pragma Ytflow.YtConsumerPath = "consumers/main_consumer";
+pragma Ytflow.YtProducerPath = "consumers/main_producer";
+
+insert into Output
+select 
+    String::AsciiToUpper(string_field) as string_field,
+    LENGTH(string_field) as int64_field,
+    String::Contains(string_field, "bar") as bool_field
+from Input;