AngersZhuuuu commented on a change in pull request #29085:
URL: https://github.com/apache/spark/pull/29085#discussion_r458608774
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File path: sql/core/src/test/resources/sql-tests/inputs/transform.sql
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@@ -0,0 +1,72 @@
+-- Test data.
+CREATE OR REPLACE TEMPORARY VIEW t1 AS SELECT * FROM VALUES
+('1', true, unhex('537061726B2053514C'), tinyint(1), 1, smallint(100),
bigint(1), float(1.0), 1.0, Decimal(1.0), timestamp('1997-01-02'),
date('2000-04-01')),
+('2', false, unhex('537061726B2053514C'), tinyint(2), 2, smallint(200),
bigint(2), float(2.0), 2.0, Decimal(2.0), timestamp('1997-01-02 03:04:05'),
date('2000-04-02')),
+('3', true, unhex('537061726B2053514C'), tinyint(3), 3, smallint(300),
bigint(3), float(3.0), 3.0, Decimal(3.0), timestamp('1997-02-10 17:32:01-08'),
date('2000-04-03'))
+as t1(a, b, c, d, e, f, g, h, i, j, k, l);
+
+SELECT TRANSFORM(a)
+USING 'cat' AS (a)
+FROM t1;
+
+-- with non-exist command
+SELECT TRANSFORM(a)
+USING 'some_non_existent_command' AS (a)
+FROM t1;
+
+-- with non-exist file
+SELECT TRANSFORM(a)
+USING 'python some_non_existent_file' AS (a)
+FROM t1;
+
+-- common supported data types between no serde and serde transform
+SELECT a, b, decode(c, 'UTF-8'), d, e, f, g, h, i, j, k, l FROM (
+ SELECT TRANSFORM(a, b, c, d, e, f, g, h, i, j, k, l)
+ USING 'cat' AS (
+ a string,
+ b boolean,
+ c binary,
+ d tinyint,
+ e int,
+ f smallint,
+ g long,
+ h float,
+ i double,
+ j decimal(38, 18),
+ k timestamp,
+ l date)
+ FROM t1
+) tmp;
+
+-- handle schema less
+SELECT TRANSFORM(a)
+USING 'cat'
+FROM t1;
+
+SELECT TRANSFORM(a, b)
+USING 'cat'
+FROM t1;
+
+SELECT TRANSFORM(a, b, c)
+USING 'cat'
+FROM t1;
+
+-- return null when return string incompatible (no serde)
+SELECT TRANSFORM(a, b, c, d, e, f, g, h, i)
+USING 'cat' as (a int, b short, c long, d byte, e float, f double, g
decimal(38, 18), h date, i timestamp)
+FROM VALUES
+('a','','1231a','a','213.21a','213.21a','0a.21d','2000-04-01123','1997-0102
00:00:') tmp(a, b, c, d, e, f, g, h, i);
+
+-- SPARK-28227: transform can't run with aggregation
+SELECT TRANSFORM(b, max(a), sum(f))
+USING 'cat' AS (a, b)
+FROM t1
+GROUP BY b;
+
+-- transform use MAP
+MAP a, b USING 'cat' AS (a, b) FROM t1;
+
+-- transform use REDUCE
+REDUCE a, b USING 'cat' AS (a, b) FROM t1;
+
+
Review comment:
Done
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