mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-15 19:37:16 +02:00
Code Issues Projects Releases Packages Wiki Activity

MDEV-16359 wrong result (extra rows) on the query with UNION and brackets

Browse source 
Due to an obvious bug in st_select_lex_unit::reset_distinct() a union
without duplicates of more than 2 selects could return a result set
containing duplicate rows if this union was enclosed in ().
This commit is contained in:
Igor Babaev 2018-08-03 23:27:24 -07:00
commit 0f9efd54ce
3 changed files with 20 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

12
mysql-test/main/brackets.result
View file

@ -207,4 +207,16 @@ a b
1 100
3 30
drop table t1;
#
# MDEV-16359: union with 3 selects in brackets
#
select 1 union select 1 union select 1;
1
1
(select 1 union select 1 union select 1);
1
1
((select 1) union (select 1) union (select 1));
1
1
# End of 10.4 tests