From 41e68e8e5b3ce89c61f19bf072b59cf13a6fdc16 Mon Sep 17 00:00:00 2001 From: Igor Babaev Date: Tue, 6 Nov 2018 09:40:07 -0800 Subject: MDEV-16357 LIMIT and ORDER BY clause is ignored on a query with UNION when using brackets Do not create master unit for select if it has already one. --- mysql-test/main/brackets.result | 24 ++++++++++++++++++++++++ mysql-test/main/brackets.test | 18 ++++++++++++++++++ 2 files changed, 42 insertions(+) (limited to 'mysql-test/main') diff --git a/mysql-test/main/brackets.result b/mysql-test/main/brackets.result index 479b74b69e4..e789cdeff76 100644 --- a/mysql-test/main/brackets.result +++ b/mysql-test/main/brackets.result @@ -219,4 +219,28 @@ select 1 union select 1 union select 1; ((select 1) union (select 1) union (select 1)); 1 1 +# +# MDEV-16357: union in brackets with tail +# union with tail in brackets +# +CREATE TABLE t1 (a int); +INSERT INTO t1 VALUES(1),(2),(3),(4); +CREATE TABLE t2 (a int); +INSERT INTO t2 VALUES (4),(5),(6),(7); +(SELECT a FROM t1 UNION SELECT a FROM t2) LIMIT 1; +a +1 +(SELECT a FROM t1 UNION SELECT a FROM t2) ORDER BY a DESC; +a +7 +6 +5 +4 +3 +2 +1 +(SELECT a FROM t1 UNION SELECT a FROM t2 LIMIT 1); +a +1 +DROP TABLE t1,t2; # End of 10.4 tests diff --git a/mysql-test/main/brackets.test b/mysql-test/main/brackets.test index 699c70a900f..0eaa3bfc0a2 100644 --- a/mysql-test/main/brackets.test +++ b/mysql-test/main/brackets.test @@ -88,5 +88,23 @@ select 1 union select 1 union select 1; (select 1 union select 1 union select 1); ((select 1) union (select 1) union (select 1)); +--echo # +--echo # MDEV-16357: union in brackets with tail +--echo # union with tail in brackets +--echo # + +CREATE TABLE t1 (a int); +INSERT INTO t1 VALUES(1),(2),(3),(4); + +CREATE TABLE t2 (a int); +INSERT INTO t2 VALUES (4),(5),(6),(7); + +(SELECT a FROM t1 UNION SELECT a FROM t2) LIMIT 1; +(SELECT a FROM t1 UNION SELECT a FROM t2) ORDER BY a DESC; + +(SELECT a FROM t1 UNION SELECT a FROM t2 LIMIT 1); + +DROP TABLE t1,t2; + --echo # End of 10.4 tests -- cgit v1.2.1