Preliminary implementation for the aggregate sum function as a window function

This implementation does not deal with the case where removal of
elements from the window frame causes the item to turn to a null value.

1 files changed, 42 insertions, 0 deletions

diff --git a/mysql-test/r/win_sum.result b/mysql-test/r/win_sum.result
new file mode 100644
index 00000000000..1db6c6eefab
--- /dev/null
+++ b/mysql-test/r/win_sum.result
@@ -0,0 +1,42 @@
+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);
+select pk, a, b, sum(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING),
+sum(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
+from t1;
+pk	a	b	sum(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)	sum(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
+101	0	10	20	3.2
+102	0	10	20	3.2
+103	1	10	20	7.199999999999999
+104	1	10	20	7.199999999999999
+105	2	20	40	13.2
+106	2	20	60	21.35
+107	2	20	50	20.35
+108	2	10	30	13.250000000000002
+109	4	20	40	19.3
+110	4	20	40	19.3
+111	5	NULL	1	23.4
+112	5	1	1	36.75
+113	5	NULL	1	40.1
+114	5	NULL	0	43.5
+115	5	NULL	0	30.15
+drop table t1;