Fixed bug mdev-4944.

The patch to fix mdev-4418 turned out to be incorrect.
At the substitution of single row tables in make_join_statistics()
the used multiple equalities may change and references to the new multiple
equalities must be updated. The function remove_eq_conds() takes care of it and
it should be called right after the substitution of single row tables.
Calling it after the call of make_join_statistics was a mistake.

1 files changed, 5 insertions, 0 deletions

diff --git a/sql/sql_select.h b/sql/sql_select.h
index eb064b39f22..083302d1e4c 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -1139,6 +1139,11 @@ public:
   bool need_tmp, hidden_group_fields;
   DYNAMIC_ARRAY keyuse;
   Item::cond_result cond_value, having_value;
+  /**
+    Impossible where after reading const tables 
+    (set in make_join_statistics())
+  */
+  bool impossible_where; 
   List<Item> all_fields; ///< to store all fields that used in query
   ///Above list changed to use temporary table
   List<Item> tmp_all_fields1, tmp_all_fields2, tmp_all_fields3;