Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19977#discussion_r157905810
--- Diff: sql/core/src/test/resources/sql-tests/inputs/string-functions.sql
---
@@ -24,3 +24,25 @@ select left("abcd", 2), left("abcd", 5), left("abcd",
'2'), left("abcd", null);
select left(null, -2), left("abcd", -2), left("abcd", 0), left("abcd",
'a');
select right("abcd", 2), right("abcd", 5), right("abcd", '2'),
right("abcd", null);
select right(null, -2), right("abcd", -2), right("abcd", 0), right("abcd",
'a');
+
+-- Concatenate binary inputs
+SELECT (col1 || col2 || col3 || col4) col
--- End diff --
Let us add a new suite in
`.../sql/core/src/test/resources/sql-tests/inputs/typeCoercion/native/`
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