Fixed LP bug #877316.

This bug happened due to incompleteness of the fix for bug 872735:
the occurrences of the fields in the conditions of correlated
subqueries were not taken into account when recalculating
covering keys bit maps.

1 files changed, 26 insertions, 0 deletions

diff --git a/mysql-test/t/derived_view.test b/mysql-test/t/derived_view.test
index 044f6a1704f..d3ddc17de3c 100644
--- a/mysql-test/t/derived_view.test
+++ b/mysql-test/t/derived_view.test
@@ -946,6 +946,32 @@ SELECT * FROM t3
 DROP VIEW v1;
 DROP TABLE t1,t2,t3;
 
+--echo #
+--echo # LP bug #877316: query over a view with correlated subquery in WHERE
+--echo #
+
+CREATE TABLE t1 (a int, b int, PRIMARY KEY (a)) ;
+INSERT INTO t1 VALUES (18,2), (19,9);
+
+CREATE TABLE t2 (a int, b int) ;
+INSERT INTO t2 VALUES (10,8), (5,10);
+
+CREATE VIEW v1 AS SELECT * FROM t1;
+
+SELECT t1.a FROM t1
+  WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < t1.b);
+EXPLAIN
+SELECT t1.a FROM t1
+  WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < t1.b);
+
+SELECT v1.a FROM v1
+  WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < v1.b);
+EXPLAIN
+SELECT v1.a FROM v1
+  WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < v1.b);
+
+DROP VIEW v1;
+DROP TABLE t1,t2;
 
 # The following command must be the last one the file 
 set optimizer_switch=@exit_optimizer_switch;