1 files changed, 73 insertions, 3 deletions

diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index dee5b1e4fb0..0bbbc5a793e 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -108,7 +108,7 @@ select * from t3 where a in (select a,b from t2);
 -- error 1241
 select * from t3 where a in (select * from t2);
 insert into t4 values (12,7),(1,7),(10,9),(9,6),(7,6),(3,9),(1,10);
--- empty set
+# empty set
 select b,max(a) as ma from t4 group by b having b < (select max(t2.a) from t2 where t2.b=t4.b);
 insert into t2 values (2,10);
 select b,max(a) as ma from t4 group by b having ma < (select max(t2.a) from t2 where t2.b=t4.b);
@@ -1955,6 +1955,39 @@ SELECT field1, field2
 
 DROP TABLE t1, t2;
 
+#
+# Bug #23478: not top-level IN subquery returning a non-empty result set
+#             with possible NULL values by index access from the outer query
+#
+
+CREATE TABLE t1(a int, INDEX (a));
+INSERT INTO t1 VALUES (1), (3), (5), (7);
+INSERT INTO t1 VALUES (NULL);
+
+CREATE TABLE t2(a int);
+INSERT INTO t2 VALUES (1),(2),(3);
+
+EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2;
+SELECT a, a IN (SELECT a FROM t1) FROM t2;
+
+DROP TABLE t1,t2;
+
+#
+# Bug #11302: getObject() returns a String for a sub-query of type datetime
+#
+CREATE TABLE t1 (a DATETIME);
+INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25');
+
+CREATE TABLE t2 AS SELECT 
+  (SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a 
+   FROM t1 WHERE a > '2000-01-01';
+SHOW CREATE TABLE t2;
+
+CREATE TABLE t3 AS (SELECT a FROM t1 WHERE a < '2000-01-01') UNION (SELECT a FROM t1 WHERE a > '2000-01-01'); 
+SHOW CREATE TABLE t3;
+
+DROP TABLE t1,t2,t3;
+
 # End of 4.1 tests
 
 #
@@ -2247,11 +2280,11 @@ drop table t1;
 # Bug#19700: subselect returning BIGINT always returned it as SIGNED
 #
 CREATE TABLE t1 (i BIGINT UNSIGNED);
-INSERT INTO t1 VALUES (10000000000000000000); -- > MAX SIGNED BIGINT 9323372036854775807
+INSERT INTO t1 VALUES (10000000000000000000); # > MAX SIGNED BIGINT 9323372036854775807
 INSERT INTO t1 VALUES (1);
 
 CREATE TABLE t2 (i BIGINT UNSIGNED);
-INSERT INTO t2 VALUES (10000000000000000000); -- same as first table
+INSERT INTO t2 VALUES (10000000000000000000); # same as first table
 INSERT INTO t2 VALUES (1);
 
 /* simple test */
@@ -2426,3 +2459,40 @@ SELECT (
 FROM t1 t2
 GROUP BY t2.a;
 DROP TABLE t1,t2;  
+
+#
+# Bug #21727: Correlated subquery that requires filesort:
+#             slow with big sort_buffer_size 
+#
+
+CREATE TABLE t1 (a int, b int auto_increment, PRIMARY KEY (b));
+CREATE TABLE t2 (x int auto_increment, y int, z int,
+                 PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
+
+disable_query_log;
+let $1=3000;
+while ($1)
+{
+  eval INSERT INTO t1(a) VALUES(RAND()*1000);
+  eval SELECT MAX(b) FROM t1 INTO @id;
+  let $2=10;
+  while ($2)
+  {
+    eval INSERT INTO t2(y,z) VALUES(@id,RAND()*1000);
+    dec $2;
+  } 
+  dec $1;
+}
+enable_query_log;
+
+SET SESSION sort_buffer_size = 32 * 1024;
+SELECT SQL_NO_CACHE COUNT(*) 
+  FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
+          FROM t1) t;
+
+SET SESSION sort_buffer_size = 8 * 1024 * 1024;
+SELECT SQL_NO_CACHE COUNT(*) 
+  FROM (SELECT  a, b, (SELECT x FROM t2 WHERE y=b ORDER BY z DESC LIMIT 1) c
+          FROM t1) t;
+
+DROP TABLE t1,t2;