Add min/max test cases for window functions

mysql-test/r/win_min_max.result

+create table t1 (
+pk int primary key,
+a int,
+b int,
+c real
+);
+insert into t1 values
+(101 , 0, 10, 1.1),
+(102 , 0, 10, 2.1),
+(103 , 1, 10, 3.1),
+(104 , 1, 10, 4.1),
+(108 , 2, 10, 5.1),
+(105 , 2, 20, 6.1),
+(106 , 2, 20, 7.1),
+(107 , 2, 20, 8.15),
+(109 , 4, 20, 9.15),
+(110 , 4, 20, 10.15),
+(111 , 5, NULL, 11.15),
+(112 , 5, 1, 12.25),
+(113 , 5, NULL, 13.35),
+(114 , 5, NULL, 14.50),
+(115 , 5, NULL, 15.65),
+(116 , 6, 1, NULL),
+(117 , 6, 1, 10),
+(118 , 6, 1, 1.1),
+(119 , 6, 1, NULL),
+(120 , 6, 1, NULL),
+(121 , 6, 1, NULL),
+(122 , 6, 1, 2.2),
+(123 , 6, 1, 20.1),
+(124 , 6, 1, -10.4),
+(125 , 6, 1, NULL),
+(126 , 6, 1, NULL),
+(127 , 6, 1, NULL);
+select pk, a, b, min(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as min,
+max(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max
+from t1;
+pk	a	b	min	max
+101	0	10	10	10
+102	0	10	10	10
+103	1	10	10	10
+104	1	10	10	10
+105	2	20	20	20
+106	2	20	20	20
+107	2	20	10	20
+108	2	10	10	20
+109	4	20	20	20
+110	4	20	20	20
+111	5	NULL	1	1
+112	5	1	1	1
+113	5	NULL	1	1
+114	5	NULL	NULL	NULL
+115	5	NULL	NULL	NULL
+116	6	1	1	1
+117	6	1	1	1
+118	6	1	1	1
+119	6	1	1	1
+120	6	1	1	1
+121	6	1	1	1
+122	6	1	1	1
+123	6	1	1	1
+124	6	1	1	1
+125	6	1	1	1
+126	6	1	1	1
+127	6	1	1	1
+select pk, a, c, min(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as min,
+max(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max
+from t1;
+pk	a	c	min	max
+101	0	1.1	1.1	2.1
+102	0	2.1	1.1	2.1
+103	1	3.1	3.1	4.1
+104	1	4.1	3.1	4.1
+105	2	6.1	6.1	7.1
+106	2	7.1	6.1	8.15
+107	2	8.15	5.1	8.15
+108	2	5.1	5.1	8.15
+109	4	9.15	9.15	10.15
+110	4	10.15	9.15	10.15
+111	5	11.15	11.15	12.25
+112	5	12.25	11.15	13.35
+113	5	13.35	12.25	14.5
+114	5	14.5	13.35	15.65
+115	5	15.65	14.5	15.65
+116	6	NULL	10	10
+117	6	10	1.1	10
+118	6	1.1	1.1	10
+119	6	NULL	1.1	1.1
+120	6	NULL	NULL	NULL
+121	6	NULL	2.2	2.2
+122	6	2.2	2.2	20.1
+123	6	20.1	-10.4	20.1
+124	6	-10.4	-10.4	20.1
+125	6	NULL	-10.4	-10.4
+126	6	NULL	NULL	NULL
+127	6	NULL	NULL	NULL
+drop table t1;

mysql-test/t/win_min_max.test

+create table t1 (
+  pk int primary key,
+  a int,
+  b int,
+  c real
+);
+
+
+insert into t1 values
+(101 , 0, 10, 1.1),
+(102 , 0, 10, 2.1),
+(103 , 1, 10, 3.1),
+(104 , 1, 10, 4.1),
+(108 , 2, 10, 5.1),
+(105 , 2, 20, 6.1),
+(106 , 2, 20, 7.1),
+(107 , 2, 20, 8.15),
+(109 , 4, 20, 9.15),
+(110 , 4, 20, 10.15),
+(111 , 5, NULL, 11.15),
+(112 , 5, 1, 12.25),
+(113 , 5, NULL, 13.35),
+(114 , 5, NULL, 14.50),
+(115 , 5, NULL, 15.65),
+(116 , 6, 1, NULL),
+(117 , 6, 1, 10),
+(118 , 6, 1, 1.1),
+(119 , 6, 1, NULL),
+(120 , 6, 1, NULL),
+(121 , 6, 1, NULL),
+(122 , 6, 1, 2.2),
+(123 , 6, 1, 20.1),
+(124 , 6, 1, -10.4),
+(125 , 6, 1, NULL),
+(126 , 6, 1, NULL),
+(127 , 6, 1, NULL);
+
+
+--sorted_result
+select pk, a, b, min(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as min,
+                 max(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max
+from t1;
+
+--sorted_result
+select pk, a, c, min(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as min,
+                 max(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as max
+from t1;
+
+drop table t1;