1 files changed, 59 insertions, 1 deletions
diff --git a/mysql-test/t/subselect_innodb.test b/mysql-test/t/subselect_innodb.test
index 3e2914eaef4..27ec36854f4 100644
--- a/mysql-test/t/subselect_innodb.test
+++ b/mysql-test/t/subselect_innodb.test
@@ -1,5 +1,7 @@
 -- source include/have_innodb.inc
 
+# Note: the tests uses only non-semijoin subqueries so semi-join switch
+#       settings are not relevant.
 set @subselect_innodb_tmp=@@optimizer_switch;
 set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
 --disable_warnings
@@ -250,5 +252,61 @@ INSERT INTO t1 VALUES ('2011-05-13', 0);
 SELECT * FROM t1 WHERE b < (SELECT CAST(a as date) FROM t1 GROUP BY a); 
 DROP TABLE t1;
 
-# Cleanups
+--echo #
+--echo # lp:827416 Crash in select_describe() on EXPLAIN with DISTINCT in nested subqueries
+--echo #
+
+CREATE TABLE t3 ( b int) ENGINE=InnoDB;
+CREATE TABLE t2 ( c int) ENGINE=InnoDB;
+CREATE TABLE t1 ( a int NOT NULL , PRIMARY KEY (a)) ENGINE=InnoDB;
+
+EXPLAIN SELECT *
+FROM t1
+WHERE t1.a = (
+        SELECT SUM( c )
+        FROM t2
+        WHERE (SELECT DISTINCT b FROM t3) > 0);
+SELECT *
+FROM t1
+WHERE t1.a = (
+        SELECT SUM( c )
+        FROM t2
+        WHERE (SELECT DISTINCT b FROM t3) > 0);
+
+DROP TABLE t1, t2, t3;
+
+
+--echo #
+--echo # lp:858148 Fourth crash in select_describe() with nested subqueries
+--echo #
+
+CREATE TABLE t1 ( f1 int(11)) ENGINE=InnoDB;
+CREATE TABLE t2 ( f1 int(11), f2 int(11), PRIMARY KEY (f1)) ;
+CREATE TABLE t3 ( f3 int(11)) ENGINE=InnoDB;
+
+EXPLAIN
+SELECT MAX( f1 ) FROM t2
+WHERE f2 >= (
+        SELECT SUM( f1 )
+        FROM t1
+        WHERE EXISTS (
+                SELECT f3
+                FROM t3
+                GROUP BY 1
+        )
+);
+
+SELECT MAX( f1 ) FROM t2
+WHERE f2 >= (
+        SELECT SUM( f1 )
+        FROM t1
+        WHERE EXISTS (
+                SELECT f3
+                FROM t3
+                GROUP BY 1
+        )
+);
+
+drop table t1, t2, t3;
+
 set optimizer_switch=@subselect_innodb_tmp;