1 files changed, 43 insertions, 0 deletions
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
new file mode 100644
index 00000000000..16ba6c9e602
--- /dev/null
+++ b/mysql-test/t/subselect.test
@@ -0,0 +1,43 @@
+
+select (select 2);
+drop table if exists t1,t2,t3,t4,attend,clinic;
+create table t1 (a int);
+create table t2 (a int, b int);
+create table t3 (a int);
+create table t4 (a int, b int);
+insert into t1 values (2);
+insert into t2 values (1,7),(2,7);
+insert into t4 values (4,8),(3,8),(5,9);
+select (select a from t1 where t1.a=t2.a), a from t2;
+select (select a from t1 where t1.a=t2.b), a from t2;
+select (select a from t1), a from t2;
+select (select a from t3), a from t2;
+select * from t2 where t2.a=(select a from t1);
+insert into t3 values (6),(7),(3);
+select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1);
+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);
+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;
+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;
+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);
+select b,max(a) as ma from t4 group by b having b < (select max(t2.a)
+from t2 where t2.b=t4.b);
+select b,max(a) as ma from t4 group by b having b >= (select max(t2.a)
+from t2 where t2.b=t4.b);
+
+create table attend (patient_uq int, clinic_uq int, index i1 (clinic_uq));
+create table clinic( uq int primary key, name char(25));
+insert into clinic values(1,"Oblastnaia bolnitsa"),(2,"Bolnitsa Krasnogo Kresta");
+insert into attend values (1,1),(1,2),(2,2),(1,3);
+select * from attend where exists (select * from clinic where uq = clinic_uq);
+
+drop table t1,t2,t3,t4,attend,clinic;