Fixed bug mdev-10868.

There was no implementation of the virtual method print()
for the Item_window_func class. As a result for a view
containing window function an invalid view definition could
be written in the frm file. When a query that refers to
this view was executed a syntax error was reported.

1 files changed, 7 insertions, 0 deletions

diff --git a/sql/item_windowfunc.cc b/sql/item_windowfunc.cc
index ccdbdd3294f..a13967eaaad 100644
--- a/sql/item_windowfunc.cc
+++ b/sql/item_windowfunc.cc
@@ -446,3 +446,10 @@ void Item_sum_hybrid_simple::update_field()
 {
   DBUG_ASSERT(0);
 }
+
+void Item_window_func::print(String *str, enum_query_type query_type)
+{
+  window_func()->print(str, query_type);
+  str->append(" over ");
+  window_spec->print(str, query_type);
+}