Bug#25123: ON DUPLICATE KEY clause allows fields not from the insert table.

When inserting into a join-based view the update fields from the ON DUPLICATE
KEY UPDATE wasn't checked to be from the table being inserted into and were
silently ignored.

The new check_view_single_update() function is added to check that
insert/update fields are being from the same single table of the view.


sql/sql_insert.cc:
  Bug#25123: ON DUPLICATE KEY clause allows fields not from the insert table.
  The new check_view_single_update() function is added to check that
  insert/update fields are being from the same single table of the view.
mysql-test/r/insert.result:
  Added a test case for bug#25123: ON DUPLICATE KEY clause allows fields not from the insert table.
mysql-test/t/insert.test:
  Added a test case for bug#25123: ON DUPLICATE KEY clause allows fields not from the insert table.

1 files changed, 21 insertions, 0 deletions

diff --git a/mysql-test/r/insert.result b/mysql-test/r/insert.result
index 78ef6fbccba..7900e0b7695 100644
--- a/mysql-test/r/insert.result
+++ b/mysql-test/r/insert.result
@@ -325,3 +325,24 @@ select row_count();
 row_count()
 1
 drop table t1;
+create table t1 (f1 int unique, f2 int);
+create table t2 (f3 int, f4 int);
+create view v1 as select * from t1, t2 where f1= f3;
+insert into t1 values (1,11), (2,22);
+insert into t2 values (1,12), (2,24);
+insert into v1 (f1) values (3) on duplicate key update f3= f3 + 10;
+ERROR HY000: Can not modify more than one base table through a join view 'test.v1'
+insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
+select * from t1;
+f1	f2
+1	11
+2	22
+3	NULL
+insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
+select * from t1;
+f1	f2
+1	11
+2	22
+12	NULL
+drop view v1;
+drop table t1,t2;