-- source ../include/have_columnstore.inc
-- source ../include/enable_ordered_only.inc

--disable_warnings
DROP DATABASE IF EXISTS mcol641_joins_db;
--enable_warnings

CREATE DATABASE mcol641_joins_db;
USE mcol641_joins_db;

--disable_query_log
SET default_storage_engine=ColumnStore;
--enable_query_log

CREATE TABLE cs1 (d1 DECIMAL(38), d2 DECIMAL(37), id TINYINT);
CREATE TABLE cs2 (i1 SMALLINT, i2 MEDIUMINT, i3 INT, i4 BIGINT);

INSERT INTO cs1 VALUES
(99,0,1),
(255,254,2),
(254,253,3),
(252,253,4),
(65535,2147483647,5),
(65534,2147483646,6),
(65533,65532,7),
(2147483647,2147483636,8),
(2147483646,2147483635,9),
(2147483645,2147483634,10),
(2147483645,9223372036854775804,11),
(9223372036854775807,0,12),
(9223372036854775807,2147483627,13),
(9223372036854775806,2147483626,14),
(9223372036854775805,9223372036854775704,15);

INSERT INTO cs2 VALUES
(255,254,NULL,NULL),
(254,253,NULL,NULL),
(251,251,NULL,NULL),
(NULL,65535,NULL,NULL),
(NULL,65535,2147483647,NULL),
(NULL,65534,2147483646,NULL),
(NULL,0,2147483641,NULL),
(NULL,NULL,2147483647,NULL),
(NULL,NULL,2147483647,2147483636),
(NULL,NULL,2147483646,2147483635),
(NULL,NULL,0,2147483641),
(NULL,NULL,NULL,9223372036854775807),
(NULL,NULL,2147483627,9223372036854775807),
(NULL,NULL,2147483626,9223372036854775806),
(NULL,NULL,0,1);

# Distributed PrimProc-based JOINs
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i2 ORDER BY id,i3;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i2 ORDER BY id,i3;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i3 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i3 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i4 AND cs2.i3 IS NOT NULL ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i4 AND cs2.i3 IS NOT NULL ORDER BY id;

# PrimProc-based composite key JOINs
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i1 AND cs1.d2 = cs2.i2 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i1 AND cs1.d2 = cs2.i2 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i2 AND cs1.d2 = cs2.i3 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i2 AND cs1.d2 = cs2.i3 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i3 AND cs1.d2 = cs2.i4 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i3 AND cs1.d2 = cs2.i4 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1 = cs2.i4 AND cs1.d2 = cs2.i3 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1 = cs2.i4 AND cs1.d2 = cs2.i3 ORDER BY id;

# ExeMgr-based JOINs
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i1 ORDER BY id,i2;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i1 ORDER BY id,i2;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i2 ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i2 ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i3 ORDER BY id,i2,i4;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i3 ORDER BY id,i2,i4;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i4 AND s2.i3 IS NOT NULL ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i4 AND s2.i3 IS NOT NULL ORDER BY id,i3;

# Functional JOIN
# Distributed PrimProc-based functional JOINs
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1 = cs2.i1-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1 = cs2.i1-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1 = cs2.i2-1 ORDER BY id,i3;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1 = cs2.i2-1 ORDER BY id,i3;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1 = cs2.i3-1 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1 = cs2.i3-1 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1 = cs2.i4-1 AND cs2.i3 IS NOT NULL ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1 = cs2.i4-1 AND cs2.i3 IS NOT NULL ORDER BY id;

# PrimProc-based composite key JOINs
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1= cs2.i1-1 AND cs1.d2-1= cs2.i2-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1= cs2.i1-1 AND cs1.d2-1= cs2.i2-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1= cs2.i2-1 AND cs1.d2-1= cs2.i3-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1= cs2.i2-1 AND cs1.d2-1= cs2.i3-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1= cs2.i3-1 AND cs1.d2-1= cs2.i4-1 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1= cs2.i3-1 AND cs1.d2-1= cs2.i4-1 ORDER BY id,i2,i4;
SELECT cs1.*, cs2.* FROM cs1 INNER JOIN cs2 ON cs1.d1-1= cs2.i4-1 AND cs1.d2-1= cs2.i3-1 ORDER BY id;
SELECT cs1.*, cs2.* FROM cs2 INNER JOIN cs1 ON cs1.d1-1= cs2.i4-1 AND cs1.d2-1= cs2.i3-1 ORDER BY id;

# ExeMgr-based JOINs
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i1-1 ORDER BY id,i2;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i1-1 ORDER BY id,i2;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i2-1 ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i2-1 ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i3-1 ORDER BY id,i2,i4;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i3-1 ORDER BY id,i2,i4;
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 INNER JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i4-1 AND s2.i3 IS NOT NULL ORDER BY id,i3;
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 INNER JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i4-1 AND s2.i3 IS NOT NULL ORDER BY id,i3;

-- source ../include/disable_ordered_only.inc

# Skewed OUTER JOIN
TRUNCATE cs1;
TRUNCATE cs2;

INSERT INTO cs1 VALUES
(99,0,1),
(255,254,2),
(254,253,3),
(252,253,4),
(-252,253,5),
(65535,2147483647,5),
(65534,2147483646,6),
(65533,65532,7),
(2147483647,2147483636,8),
(2147483646,2147483635,9),
(2147483645,2147483634,10),
(2147483645,9223372036854775804,11),
(9223372036854775807,0,12),
(9223372036854775807,2147483627,13),
(9223372036854775806,2147483626,14),
(9223372036854775805,9223372036854775704,15);

INSERT INTO cs2 VALUES
(255,254,NULL,NULL),
(254,253,NULL,NULL),
(251,251,NULL,NULL),
(-252,253,NULL,NULL),
(-250,253,NULL,NULL),
(NULL,65535,NULL,NULL),
(NULL,65535,2147483647,NULL),
(NULL,65534,2147483646,NULL),
(NULL,0,2147483641,NULL),
(NULL,NULL,2147483647,NULL),
(NULL,NULL,2147483647,2147483636),
(NULL,NULL,2147483646,2147483635),
(NULL,NULL,0,2147483641),
(NULL,NULL,NULL,9223372036854775807),
(NULL,NULL,2147483627,9223372036854775807),
(NULL,NULL,2147483626,9223372036854775806),
(NULL,NULL,0,1);

# Distributed PrimProc-based JOINs
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i2 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i2 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i3 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i3 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i4 AND cs2.i3 IS NOT NULL ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i4 AND cs2.i3 IS NOT NULL ;

# PrimProc-based composite key JOINs
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i1 AND cs1.d2 = cs2.i2 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i1 AND cs1.d2 = cs2.i2 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i2 AND cs1.d2 = cs2.i3 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i2 AND cs1.d2 = cs2.i3 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i3 AND cs1.d2 = cs2.i4 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i3 AND cs1.d2 = cs2.i4 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1 = cs2.i4 AND cs1.d2 = cs2.i3 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1 = cs2.i4 AND cs1.d2 = cs2.i3 ;

# ExeMgr-based JOINs
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i2 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i2 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i3 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i3 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1=s2.i4 AND s2.i3 IS NOT NULL ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1=s2.i4 AND s2.i3 IS NOT NULL ;

# Functional JOIN
# Distributed PrimProc-based functional JOINs
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1 = cs2.i1-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1 = cs2.i1-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1 = cs2.i2-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1 = cs2.i2-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1 = cs2.i3-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1 = cs2.i3-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1 = cs2.i4-1 AND cs2.i3 IS NOT NULL ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1 = cs2.i4-1 AND cs2.i3 IS NOT NULL ;

# PrimProc-based composite key JOINs
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1= cs2.i1-1 AND cs1.d2-1= cs2.i2-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1= cs2.i1-1 AND cs1.d2-1= cs2.i2-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1= cs2.i2-1 AND cs1.d2-1= cs2.i3-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1= cs2.i2-1 AND cs1.d2-1= cs2.i3-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1= cs2.i3-1 AND cs1.d2-1= cs2.i4-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1= cs2.i3-1 AND cs1.d2-1= cs2.i4-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs1 LEFT JOIN cs2 ON cs1.d1-1= cs2.i4-1 AND cs1.d2-1= cs2.i3-1 ;
--sorted_result
SELECT cs1.*, cs2.* FROM cs2 LEFT JOIN cs1 ON cs1.d1-1= cs2.i4-1 AND cs1.d2-1= cs2.i3-1 ;

# ExeMgr-based JOINs
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i1-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i1-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i2-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i2-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i3-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i3-1 ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs1)s1 LEFT JOIN (SELECT * FROM cs2)s2 ON s1.d1-1=s2.i4-1 AND s2.i3 IS NOT NULL ;
--sorted_result
SELECT s1.*,s2.* FROM (SELECT * FROM cs2)s2 LEFT JOIN (SELECT * FROM cs1)s1 ON s1.d1-1=s2.i4-1 AND s2.i3 IS NOT NULL ;

# Misc skewed JOIN

CREATE TABLE t1 (a DECIMAL(10,1), b DECIMAL(20,1));
INSERT INTO t1 VALUES (10.1,20.1);
CREATE TABLE t2 (a DECIMAL(20,1), b DECIMAL(10,1));
INSERT INTO t2 VALUES (10.1,20.1);
SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b=t2.b;

DROP TABLE t1,t2;
CREATE TABLE t1 (a CHAR(10), b DECIMAL(10,1));
INSERT INTO t1 VALUES (10.1,20.1);
CREATE TABLE t2 (a CHAR(10), b DECIMAL(20,1));
INSERT INTO t2 VALUES (10.1,20.1);
SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b=t2.b;
SELECT * FROM t2,t1 WHERE t1.a=t2.a AND t1.b=t2.b;

DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(10,1), b CHAR(10));
INSERT INTO t1 VALUES (10.1,20.1);
CREATE TABLE t2 (a DECIMAL(20,1), b CHAR(10));
INSERT INTO t2 VALUES (10.1,20.1);
SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b=t2.b;
SELECT * FROM t2,t1 WHERE t1.a=t2.a AND t1.b=t2.b;

SELECT * FROM t2,t1 WHERE (t1.a,t1.b)=(t2.a,t2.b);
SELECT * FROM t1,t2 WHERE (t1.a,t1.b)=(t2.a,t2.b);

SELECT * FROM t1 JOIN t2 USING (a,b);
SELECT * FROM t2 JOIN t1 USING (a,b);

# Testing the max number of skewed columns in a join.
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(10,1), b DECIMAL(20,1),a1 DECIMAL(10,1), b1 DECIMAL(20,1),a2 DECIMAL(10,1), b2 DECIMAL(20,1),a3 DECIMAL(10,1), b3 DECIMAL(20,1),a4 DECIMAL(10,1), b4 DECIMAL(20,1),a5 DECIMAL(10,1));
INSERT INTO t1 VALUES (10.1,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1);
CREATE TABLE t2 (a DECIMAL(20,1), b DECIMAL(10,1),a1 DECIMAL(20,1), b1 DECIMAL(10,1),a2 DECIMAL(20,1), b2 DECIMAL(10,1),a3 DECIMAL(20,1), b3 DECIMAL(10,1),a4 DECIMAL(20,1), b4 DECIMAL(10,1),a5 DECIMAL(20,1));
INSERT INTO t2 VALUES (10.1,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1);
# These work b/c the max is 10 columns.
SELECT * FROM t1 INNER JOIN t2 USING(a,b,a1,b1,a2,b2,a3,b3,a4);
SELECT * FROM t2 INNER JOIN t1 USING(a,b,a1,b1,a2,b2,a3,b3,a4);
# These do not.
#SELECT * FROM t1 INNER JOIN t2 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,a5);
#SELECT * FROM t1 INNER JOIN t2 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,a5);

# Mixing skewed columns with non-skewed.
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(10,1), t text, b DECIMAL(20,1), i1 int, a1 DECIMAL(10,1), b1 DECIMAL(20,1),a2 DECIMAL(10,1), b2 DECIMAL(20,1),a3 DECIMAL(10,1), b3 DECIMAL(20,1),a4 DECIMAL(10,1), b4 DECIMAL(20,1),a5 DECIMAL(10,1));
INSERT INTO t1 VALUES (10.1,'some',20.1,42,10.1,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1);
CREATE TABLE t2 (a DECIMAL(20,1), b DECIMAL(10,1), t text, a1 DECIMAL(20,1), i1 int, b1 DECIMAL(10,1),a2 DECIMAL(20,1), b2 DECIMAL(10,1),a3 DECIMAL(20,1), b3 DECIMAL(10,1),a4 DECIMAL(20,1), b4 DECIMAL(10,1),a5 DECIMAL(20,1));
INSERT INTO t2 VALUES (10.1,20.1,'some',10.1,42,20.1,10.1,20.1,10.1,20.1,10.1,20.1,10.1);

# These work b/c the max is 10 columns.
SELECT * FROM t1 INNER JOIN t2 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,t,i1);
SELECT * FROM t2 INNER JOIN t1 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,t,i1);
# These do not.
#SELECT * FROM t1 INNER JOIN t2 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,a5,t,i1);
#SELECT * FROM t2 INNER JOIN t1 USING(a,b,a1,b1,a2,b2,a3,b3,a4,b4,a5,t,i1);

SELECT t1.a,t1.t,t1.i1 FROM t1 INNER JOIN (SELECT * from t2) s1 USING(a,b);
SELECT t2.a,t2.t,s1.i1 FROM t2 INNER JOIN (SELECT * from t1) s1 USING(a,b);
SELECT t1.a,t1.t,t1.i1 FROM t1 INNER JOIN (SELECT * from t2) s1 where t1.a+1=s1.a+1 and t1.b+1=s1.b+1;
SELECT t2.a,t2.t,t2.i1 FROM t2 INNER JOIN (SELECT * from t1) s1 where t2.a+1=s1.a+1 and t2.b+1=s1.b+1;

# Clean UP
DROP DATABASE mcol641_joins_db;