[SPARK-28276][SQL][PYTHON][TEST] Convert and port 'cross-join.sql' into UDF test base

sql/core/src/test/resources/sql-tests/inputs/udf/udf-cross-join.sql

@@ -0,0 +1,37 @@
+-- Cross join detection and error checking is done in JoinSuite since explain output is
+-- used in the error message and the ids are not stable. Only positive cases are checked here.
+-- This test file was converted from cross-join.sql.
+
+create temporary view nt1 as select * from values
+  ("one", 1),
+  ("two", 2),
+  ("three", 3)
+  as nt1(k, v1);
+
+create temporary view nt2 as select * from values
+  ("one", 1),
+  ("two", 22),
+  ("one", 5)
+  as nt2(k, v2);
+
+-- Cross joins with and without predicates
+SELECT * FROM nt1 cross join nt2;
+SELECT * FROM nt1 cross join nt2 where udf(nt1.k) = udf(nt2.k);
+SELECT * FROM nt1 cross join nt2 on (udf(nt1.k) = udf(nt2.k));
+SELECT * FROM nt1 cross join nt2 where udf(nt1.v1) = "1" and udf(nt2.v2) = "22";
+
+SELECT udf(a.key), udf(b.key) FROM
+(SELECT udf(k) key FROM nt1 WHERE v1 < 2) a
+CROSS JOIN
+(SELECT udf(k) key FROM nt2 WHERE v2 = 22) b;
+
+-- Join reordering 
+create temporary view A(a, va) as select * from nt1;
+create temporary view B(b, vb) as select * from nt1;
+create temporary view C(c, vc) as select * from nt1;
+create temporary view D(d, vd) as select * from nt1;
+
+-- Allowed since cross join with C is explicit
+select * from ((A join B on (udf(a) = udf(b))) cross join C) join D on (udf(a) = udf(d));
+-- Cross joins with non-equal predicates
+SELECT * FROM nt1 CROSS JOIN nt2 ON (udf(nt1.k) > udf(nt2.k));

sql/core/src/test/resources/sql-tests/results/udf/udf-cross-join.sql.out

@@ -0,0 +1,140 @@
+-- Automatically generated by SQLQueryTestSuite
+-- Number of queries: 13
+
+
+-- !query 0
+create temporary view nt1 as select * from values
+  ("one", 1),
+  ("two", 2),
+  ("three", 3)
+  as nt1(k, v1)
+-- !query 0 schema
+struct<>
+-- !query 0 output
+
+
+
+-- !query 1
+create temporary view nt2 as select * from values
+  ("one", 1),
+  ("two", 22),
+  ("one", 5)
+  as nt2(k, v2)
+-- !query 1 schema
+struct<>
+-- !query 1 output
+
+
+
+-- !query 2
+SELECT * FROM nt1 cross join nt2
+-- !query 2 schema
+struct<k:string,v1:int,k:string,v2:int>
+-- !query 2 output
+one	1	one	1
+one	1	one	5
+one	1	two	22
+three	3	one	1
+three	3	one	5
+three	3	two	22
+two	2	one	1
+two	2	one	5
+two	2	two	22
+
+
+-- !query 3
+SELECT * FROM nt1 cross join nt2 where udf(nt1.k) = udf(nt2.k)
+-- !query 3 schema
+struct<k:string,v1:int,k:string,v2:int>
+-- !query 3 output
+one	1	one	1
+one	1	one	5
+two	2	two	22
+
+
+-- !query 4
+SELECT * FROM nt1 cross join nt2 on (udf(nt1.k) = udf(nt2.k))
+-- !query 4 schema
+struct<k:string,v1:int,k:string,v2:int>
+-- !query 4 output
+one	1	one	1
+one	1	one	5
+two	2	two	22
+
+
+-- !query 5
+SELECT * FROM nt1 cross join nt2 where udf(nt1.v1) = "1" and udf(nt2.v2) = "22"
+-- !query 5 schema
+struct<k:string,v1:int,k:string,v2:int>
+-- !query 5 output
+one	1	two	22
+
+
+-- !query 6
+SELECT udf(a.key), udf(b.key) FROM
+(SELECT udf(k) key FROM nt1 WHERE v1 < 2) a
+CROSS JOIN
+(SELECT udf(k) key FROM nt2 WHERE v2 = 22) b
+-- !query 6 schema
+struct<CAST(udf(cast(key as string)) AS STRING):string,CAST(udf(cast(key as string)) AS STRING):string>
+-- !query 6 output
+one	two
+
+
+-- !query 7
+create temporary view A(a, va) as select * from nt1
+-- !query 7 schema
+struct<>
+-- !query 7 output
+
+
+
+-- !query 8
+create temporary view B(b, vb) as select * from nt1
+-- !query 8 schema
+struct<>
+-- !query 8 output
+
+
+
+-- !query 9
+create temporary view C(c, vc) as select * from nt1
+-- !query 9 schema
+struct<>
+-- !query 9 output
+
+
+
+-- !query 10
+create temporary view D(d, vd) as select * from nt1
+-- !query 10 schema
+struct<>
+-- !query 10 output
+
+
+
+-- !query 11
+select * from ((A join B on (udf(a) = udf(b))) cross join C) join D on (udf(a) = udf(d))
+-- !query 11 schema
+struct<a:string,va:int,b:string,vb:int,c:string,vc:int,d:string,vd:int>
+-- !query 11 output
+one	1	one	1	one	1	one	1
+one	1	one	1	three	3	one	1
+one	1	one	1	two	2	one	1
+three	3	three	3	one	1	three	3
+three	3	three	3	three	3	three	3
+three	3	three	3	two	2	three	3
+two	2	two	2	one	1	two	2
+two	2	two	2	three	3	two	2
+two	2	two	2	two	2	two	2
+
+
+-- !query 12
+SELECT * FROM nt1 CROSS JOIN nt2 ON (udf(nt1.k) > udf(nt2.k))
+-- !query 12 schema
+struct<k:string,v1:int,k:string,v2:int>
+-- !query 12 output
+three	3	one	1
+three	3	one	5
+two	2	one	1
+two	2	one	5