HyukjinKwon commented on a change in pull request #25124:
[SPARK-28282][SQL][PYTHON][TESTS] Convert and port 'inline-table.sql' into UDF
test base
URL: https://github.com/apache/spark/pull/25124#discussion_r304730452
##########
File path:
sql/core/src/test/resources/sql-tests/inputs/udf/udf-inline-table.sql
##########
@@ -0,0 +1,54 @@
+-- This test file was converted from intersect-all.sql.
+-- Note that currently registered UDF returns a string. So there are some
differences, for instance
+-- in string cast within UDF in Scala and Python.
+
+-- single row, without table and column alias
+select * from values ("one", 1);
+
+-- single row, without column alias
+select * from values ("one", 1) as data;
+
+-- single row
+select udf(a), b from values ("one", 1) as data(a, b);
+
+-- single column multiple rows
+select udf(a) from values 1, 2, 3 as data(a);
+
+-- three rows
+select udf(a), b from values ("one", 1), ("two", 2), ("three", null) as
data(a, b);
+
+-- null type
+select udf(a), b from values ("one", null), ("two", null) as data(a, b);
+
+-- int and long coercion
+select udf(a), b from values ("one", 1), ("two", 2L) as data(a, b);
+
+-- foldable expressions
+select udf(a), udf(b) from values ("one", 1 + 0), ("two", 1 + 3L) as data(a,
b);
Review comment:
I would test `udf(udf(a))` too
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