Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22626#discussion_r230544760
--- Diff: sql/core/src/test/resources/sql-tests/inputs/csv-functions.sql ---
@@ -15,3 +15,10 @@ CREATE TEMPORARY VIEW csvTable(csvField, a) AS SELECT *
FROM VALUES ('1,abc', 'a
SELECT schema_of_csv(csvField) FROM csvTable;
-- Clean up
DROP VIEW IF EXISTS csvTable;
+-- to_csv
+select to_csv(named_struct('a', 1, 'b', 2));
+select to_csv(named_struct('time', to_timestamp('2015-08-26',
'yyyy-MM-dd')), map('timestampFormat', 'dd/MM/yyyy'));
+-- Check if errors handled
+select to_csv(named_struct('a', 1, 'b', 2), named_struct('mode',
'PERMISSIVE'));
+select to_csv(named_struct('a', 1, 'b', 2), map('mode', 1));
+select to_csv();
--- End diff --
I think we don't have to test this since it's not specific to this
expression.
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