[SPARK-18871][SQL] New test cases for IN/NOT IN subquery

## What changes were proposed in this pull request?
This PR extends the existing IN/NOT IN subquery test cases coverage, adds more test cases to the IN subquery test suite.

Based on the discussion, we will create  `subquery/in-subquery` sub structure under `sql/core/src/test/resources/sql-tests/inputs` directory.

This is the high level grouping for IN subquery:

`subquery/in-subquery/`
`subquery/in-subquery/simple-in.sql`
`subquery/in-subquery/in-group-by.sql (in parent side, subquery, and both)`
`subquery/in-subquery/not-in-group-by.sql`
`subquery/in-subquery/in-order-by.sql`
`subquery/in-subquery/in-limit.sql`
`subquery/in-subquery/in-having.sql`
`subquery/in-subquery/in-joins.sql`
`subquery/in-subquery/not-in-joins.sql`
`subquery/in-subquery/in-set-operations.sql`
`subquery/in-subquery/in-with-cte.sql`
`subquery/in-subquery/not-in-with-cte.sql`
subquery/in-subquery/in-multiple-columns.sql`

We will deliver it through multiple prs, this is the first pr for the IN subquery, it has

`subquery/in-subquery/simple-in.sql`
`subquery/in-subquery/in-group-by.sql (in parent side, subquery, and both)`

These are the results from running on DB2.
[Modified test file of in-group-by.sql used to run on DB2](https://github.com/apache/spark/files/683367/in-group-by.sql.db2.txt)
[Output of the run result on DB2](https://github.com/apache/spark/files/683362/in-group-by.sql.db2.out.txt)
[Modified test file of simple-in.sql used to run on DB2](https://github.com/apache/spark/files/683378/simple-in.sql.db2.txt)
[Output of the run result on DB2](https://github.com/apache/spark/files/683379/simple-in.sql.db2.out.txt)

## How was this patch tested?

This patch is adding tests.

Author: Kevin Yu <qyu@us.ibm.com>

Closes #16337 from kevinyu98/spark-18871.

1 files changed, 239 insertions, 0 deletions

diff --git a/sql/core/src/test/resources/sql-tests/inputs/subquery/in-subquery/in-group-by.sql b/sql/core/src/test/resources/sql-tests/inputs/subquery/in-subquery/in-group-by.sql
new file mode 100644
index 0000000000..b1d96b32c2
--- /dev/null
+++ b/sql/core/src/test/resources/sql-tests/inputs/subquery/in-subquery/in-group-by.sql
@@ -0,0 +1,239 @@
+-- A test suite for GROUP BY in parent side, subquery, and both predicate subquery
+-- It includes correlated cases.
+
+create temporary view t1 as select * from values
+  ("t1a", 6S, 8, 10L, float(15.0), 20D, 20E2, timestamp '2014-04-04 01:00:00.000', date '2014-04-04'),
+  ("t1b", 8S, 16, 19L, float(17.0), 25D, 26E2, timestamp '2014-05-04 01:01:00.000', date '2014-05-04'),
+  ("t1a", 16S, 12, 21L, float(15.0), 20D, 20E2, timestamp '2014-06-04 01:02:00.001', date '2014-06-04'),
+  ("t1a", 16S, 12, 10L, float(15.0), 20D, 20E2, timestamp '2014-07-04 01:01:00.000', date '2014-07-04'),
+  ("t1c", 8S, 16, 19L, float(17.0), 25D, 26E2, timestamp '2014-05-04 01:02:00.001', date '2014-05-05'),
+  ("t1d", null, 16, 22L, float(17.0), 25D, 26E2, timestamp '2014-06-04 01:01:00.000', null),
+  ("t1d", null, 16, 19L, float(17.0), 25D, 26E2, timestamp '2014-07-04 01:02:00.001', null),
+  ("t1e", 10S, null, 25L, float(17.0), 25D, 26E2, timestamp '2014-08-04 01:01:00.000', date '2014-08-04'),
+  ("t1e", 10S, null, 19L, float(17.0), 25D, 26E2, timestamp '2014-09-04 01:02:00.001', date '2014-09-04'),
+  ("t1d", 10S, null, 12L, float(17.0), 25D, 26E2, timestamp '2015-05-04 01:01:00.000', date '2015-05-04'),
+  ("t1a", 6S, 8, 10L, float(15.0), 20D, 20E2, timestamp '2014-04-04 01:02:00.001', date '2014-04-04'),
+  ("t1e", 10S, null, 19L, float(17.0), 25D, 26E2, timestamp '2014-05-04 01:01:00.000', date '2014-05-04')
+  as t1(t1a, t1b, t1c, t1d, t1e, t1f, t1g, t1h, t1i);
+
+create temporary view t2 as select * from values
+  ("t2a", 6S, 12, 14L, float(15), 20D, 20E2, timestamp '2014-04-04 01:01:00.000', date '2014-04-04'),
+  ("t1b", 10S, 12, 19L, float(17), 25D, 26E2, timestamp '2014-05-04 01:01:00.000', date '2014-05-04'),
+  ("t1b", 8S, 16, 119L, float(17), 25D, 26E2, timestamp '2015-05-04 01:01:00.000', date '2015-05-04'),
+  ("t1c", 12S, 16, 219L, float(17), 25D, 26E2, timestamp '2016-05-04 01:01:00.000', date '2016-05-04'),
+  ("t1b", null, 16, 319L, float(17), 25D, 26E2, timestamp '2017-05-04 01:01:00.000', null),
+  ("t2e", 8S, null, 419L, float(17), 25D, 26E2, timestamp '2014-06-04 01:01:00.000', date '2014-06-04'),
+  ("t1f", 19S, null, 519L, float(17), 25D, 26E2, timestamp '2014-05-04 01:01:00.000', date '2014-05-04'),
+  ("t1b", 10S, 12, 19L, float(17), 25D, 26E2, timestamp '2014-06-04 01:01:00.000', date '2014-06-04'),
+  ("t1b", 8S, 16, 19L, float(17), 25D, 26E2, timestamp '2014-07-04 01:01:00.000', date '2014-07-04'),
+  ("t1c", 12S, 16, 19L, float(17), 25D, 26E2, timestamp '2014-08-04 01:01:00.000', date '2014-08-05'),
+  ("t1e", 8S, null, 19L, float(17), 25D, 26E2, timestamp '2014-09-04 01:01:00.000', date '2014-09-04'),
+  ("t1f", 19S, null, 19L, float(17), 25D, 26E2, timestamp '2014-10-04 01:01:00.000', date '2014-10-04'),
+  ("t1b", null, 16, 19L, float(17), 25D, 26E2, timestamp '2014-05-04 01:01:00.000', null)
+  as t2(t2a, t2b, t2c, t2d, t2e, t2f, t2g, t2h, t2i);
+
+create temporary view t3 as select * from values
+  ("t3a", 6S, 12, 110L, float(15), 20D, 20E2, timestamp '2014-04-04 01:02:00.000', date '2014-04-04'),
+  ("t3a", 6S, 12, 10L, float(15), 20D, 20E2, timestamp '2014-05-04 01:02:00.000', date '2014-05-04'),
+  ("t1b", 10S, 12, 219L, float(17), 25D, 26E2, timestamp '2014-05-04 01:02:00.000', date '2014-05-04'),
+  ("t1b", 10S, 12, 19L, float(17), 25D, 26E2, timestamp '2014-05-04 01:02:00.000', date '2014-05-04'),
+  ("t1b", 8S, 16, 319L, float(17), 25D, 26E2, timestamp '2014-06-04 01:02:00.000', date '2014-06-04'),
+  ("t1b", 8S, 16, 19L, float(17), 25D, 26E2, timestamp '2014-07-04 01:02:00.000', date '2014-07-04'),
+  ("t3c", 17S, 16, 519L, float(17), 25D, 26E2, timestamp '2014-08-04 01:02:00.000', date '2014-08-04'),
+  ("t3c", 17S, 16, 19L, float(17), 25D, 26E2, timestamp '2014-09-04 01:02:00.000', date '2014-09-05'),
+  ("t1b", null, 16, 419L, float(17), 25D, 26E2, timestamp '2014-10-04 01:02:00.000', null),
+  ("t1b", null, 16, 19L, float(17), 25D, 26E2, timestamp '2014-11-04 01:02:00.000', null),
+  ("t3b", 8S, null, 719L, float(17), 25D, 26E2, timestamp '2014-05-04 01:02:00.000', date '2014-05-04'),
+  ("t3b", 8S, null, 19L, float(17), 25D, 26E2, timestamp '2015-05-04 01:02:00.000', date '2015-05-04')
+  as t3(t3a, t3b, t3c, t3d, t3e, t3f, t3g, t3h, t3i);
+
+-- correlated IN subquery
+-- GROUP BY in parent side
+-- TC 01.01
+SELECT t1a,
+       Avg(t1b)
+FROM   t1
+WHERE  t1a IN (SELECT t2a
+               FROM   t2)
+GROUP  BY t1a;
+
+-- TC 01.02
+SELECT t1a,
+       Max(t1b)
+FROM   t1
+WHERE  t1b IN (SELECT t2b
+               FROM   t2
+               WHERE  t1a = t2a)
+GROUP  BY t1a,
+          t1d;
+
+-- TC 01.03
+SELECT t1a,
+       t1b
+FROM   t1
+WHERE  t1c IN (SELECT t2c
+               FROM   t2
+               WHERE  t1a = t2a)
+GROUP  BY t1a,
+          t1b;
+
+-- TC 01.04
+SELECT t1a,
+       Sum(DISTINCT( t1b ))
+FROM   t1
+WHERE  t1c IN (SELECT t2c
+               FROM   t2
+               WHERE  t1a = t2a)
+        OR t1c IN (SELECT t3c
+                   FROM   t3
+                   WHERE  t1a = t3a)
+GROUP  BY t1a,
+          t1c;
+
+-- TC 01.05
+SELECT t1a,
+       Sum(DISTINCT( t1b ))
+FROM   t1
+WHERE  t1c IN (SELECT t2c
+               FROM   t2
+               WHERE  t1a = t2a)
+       AND t1c IN (SELECT t3c
+                   FROM   t3
+                   WHERE  t1a = t3a)
+GROUP  BY t1a,
+          t1c;
+
+-- TC 01.06
+SELECT t1a,
+       Count(DISTINCT( t1b ))
+FROM   t1
+WHERE  t1c IN (SELECT t2c
+               FROM   t2
+               WHERE  t1a = t2a)
+GROUP  BY t1a,
+          t1c
+HAVING t1a = "t1b";
+
+-- GROUP BY in subquery
+-- TC 01.07
+SELECT *
+FROM   t1
+WHERE  t1b IN (SELECT Max(t2b)
+               FROM   t2
+               GROUP  BY t2a);
+
+-- TC 01.08
+SELECT *
+FROM   (SELECT t2a,
+               t2b
+        FROM   t2
+        WHERE  t2a IN (SELECT t1a
+                       FROM   t1
+                       WHERE  t1b = t2b)
+        GROUP  BY t2a,
+                  t2b) t2;
+
+-- TC 01.09
+SELECT Count(DISTINCT( * ))
+FROM   t1
+WHERE  t1b IN (SELECT Min(t2b)
+               FROM   t2
+               WHERE  t1a = t2a
+                      AND t1c = t2c
+               GROUP  BY t2a);
+
+-- TC 01.10
+SELECT t1a,
+       t1b
+FROM   t1
+WHERE  t1c IN (SELECT Max(t2c)
+               FROM   t2
+               WHERE  t1a = t2a
+               GROUP  BY t2a,
+                         t2c
+               HAVING t2c > 8);
+
+-- TC 01.11
+SELECT t1a,
+       t1b
+FROM   t1
+WHERE  t1c IN (SELECT t2c
+               FROM   t2
+               WHERE  t2a IN (SELECT Min(t3a)
+                              FROM   t3
+                              WHERE  t3a = t2a
+                              GROUP  BY t3b)
+               GROUP  BY t2c);
+
+-- GROUP BY in both
+-- TC 01.12
+SELECT t1a,
+       Min(t1b)
+FROM   t1
+WHERE  t1c IN (SELECT Min(t2c)
+               FROM   t2
+               WHERE  t2b = t1b
+               GROUP  BY t2a)
+GROUP  BY t1a;
+
+-- TC 01.13
+SELECT t1a,
+       Min(t1b)
+FROM   t1
+WHERE  t1c IN (SELECT Min(t2c)
+               FROM   t2
+               WHERE  t2b IN (SELECT Min(t3b)
+                              FROM   t3
+                              WHERE  t2a = t3a
+                              GROUP  BY t3a)
+               GROUP  BY t2c)
+GROUP  BY t1a,
+          t1d;
+
+-- TC 01.14
+SELECT t1a,
+       Min(t1b)
+FROM   t1
+WHERE  t1c IN (SELECT Min(t2c)
+               FROM   t2
+               WHERE  t2b = t1b
+               GROUP  BY t2a)
+       AND t1d IN (SELECT t3d
+                   FROM   t3
+                   WHERE  t1c = t3c
+                   GROUP  BY t3d)
+GROUP  BY t1a;
+
+-- TC 01.15
+SELECT t1a,
+       Min(t1b)
+FROM   t1
+WHERE  t1c IN (SELECT Min(t2c)
+               FROM   t2
+               WHERE  t2b = t1b
+               GROUP  BY t2a)
+        OR t1d IN (SELECT t3d
+                   FROM   t3
+                   WHERE  t1c = t3c
+                   GROUP  BY t3d)
+GROUP  BY t1a;
+
+-- TC 01.16
+SELECT t1a,
+       Min(t1b)
+FROM   t1
+WHERE  t1c IN (SELECT Min(t2c)
+               FROM   t2
+               WHERE  t2b = t1b
+               GROUP  BY t2a
+               HAVING t2a > t1a)
+        OR t1d IN (SELECT t3d
+                   FROM   t3
+                   WHERE  t1c = t3c
+                   GROUP  BY t3d
+                   HAVING t3d = t1d)
+GROUP  BY t1a
+HAVING Min(t1b) IS NOT NULL;
+
+
+