1 files changed, 6 insertions, 0 deletions
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index 8b9ed3b89c9..68a89796ec3 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -19,13 +19,18 @@ select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)
 union (select * from t4 order by a limit 2) limit 3;
 select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1) 
 union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
+explain select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1) 
+union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
 select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
 select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from 
 (select * from t2 where a>1) as tt;
+explain select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from 
+(select * from t2 where a>1) as tt;
 select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1);
 select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1);
 select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1);
 select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
+explain select b,(select avg(t2.a+(select min(t3.a) from t3 where t3.a >= t4.a)) from t2) from t4;
 select * from t3 where exists (select * from t2 where t2.b=t3.a);
 select * from t3 where not exists (select * from t2 where t2.b=t3.a);
 insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9);
@@ -39,6 +44,7 @@ insert into t5 values (5);
 select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
 insert into t5 values (2);
 select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
+explain select (select a from t1 where t1.a=t2.a union select a from t5 where t5.a=t2.a), a from t2;
 -- error 1230
 select (select a from t1 where t1.a=t2.a union all select a from t5 where t5.a=t2.a), a from t2;
 create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));