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Diffstat (limited to 'mysql-test/t/select.test')
| -rw-r--r-- | mysql-test/t/select.test | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/mysql-test/t/select.test b/mysql-test/t/select.test index c2e451ea7f3..9884c88b420 100644 --- a/mysql-test/t/select.test +++ b/mysql-test/t/select.test @@ -1832,3 +1832,23 @@ INSERT INTO t2 VALUES (2517), (2518), (2519), (2520), (2521), (2522); select * from t1, t2 WHERE t1.t2_id = t2.id and t1.t2_id > 0 order by t1.id LIMIT 0, 5; drop table t1,t2; +# +# outer join, impossible on condition, where, and usable key for range +# +create table t1 (id1 int NOT NULL); +create table t2 (id2 int NOT NULL); +create table t3 (id3 int NOT NULL); +create table t4 (id4 int NOT NULL, id44 int NOT NULL, KEY (id4)); + +insert into t1 values (1); +insert into t1 values (2); +insert into t2 values (1); +insert into t4 values (1,1); + +explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 +left join t4 on id3 = id4 where id2 = 1 or id4 = 1; +select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 +left join t4 on id3 = id4 where id2 = 1 or id4 = 1; + +drop table t1,t2,t3,t4; + |