Fixed bug mdev-10874.

In some cases the method Window_funcs_sort::setup() did
not build the sequence of sorting keys correctly.

1 files changed, 48 insertions, 0 deletions

diff --git a/mysql-test/t/win.test b/mysql-test/t/win.test
index de03dd10253..10c673ac1b3 100644
--- a/mysql-test/t/win.test
+++ b/mysql-test/t/win.test
@@ -1262,3 +1262,51 @@ select pk,
 from t1;
 
 drop table t1;
+
+--echo #
+--echo # MDEV-10874: two window functions with ccompatible sorting 
+--echo #
+
+create table t1 (
+pk int primary key,
+a int,
+b int,
+c char(10),
+d decimal(10, 3),
+e real
+);
+insert into t1 values
+( 1, 0, 1,    'one',    0.1,  0.001),
+( 2, 0, 2,    'two',    0.2,  0.002),
+( 3, 0, 3,    'three',  0.3,  0.003),
+( 4, 1, 2,    'three',  0.4,  0.004),
+( 5, 1, 1,    'two',    0.5,  0.005),
+( 6, 1, 1,    'one',    0.6,  0.006),
+( 7, 2, NULL, 'n_one',  0.5,  0.007),
+( 8, 2, 1,    'n_two',  NULL, 0.008),
+( 9, 2, 2,    NULL,     0.7,  0.009),
+(10, 2, 0,    'n_four', 0.8,  0.010),
+(11, 2, 10,   NULL,     0.9,  NULL);
+
+select pk, a, d,
+       sum(d) over (partition by a order by pk
+                    ROWS between 1 preceding and current row) as sum_1, 
+       sum(d) over (order by a 
+                    ROWS BETWEEN 1 preceding and 2 following) as sum_2
+from t1;
+explain format=json
+select pk, a, d,
+       sum(d) over (partition by a order by pk
+                    ROWS between 1 preceding and current row) as sum_1, 
+       sum(d) over (order by a 
+                    ROWS BETWEEN 1 preceding and 2 following) as sum_2
+from t1;
+
+select pk, a, d,
+       sum(d) over (partition by a order by pk desc
+                    ROWS between 1 preceding and current row) as sum_1, 
+       sum(d) over (order by a 
+                    ROWS BETWEEN 1 preceding and 2 following) as sum_2
+from t1;
+
+drop table t1;