Fix for MIN/MAX with empty tables

MIN(key_column) could in some cases return NULL on a column with NULL and other values.
MIN(key_column) and MAX(key_column) could in some cases return wrong values when used in OUTER JOIN.

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/item.h b/sql/item.h
index b690807691f..c669c266f0f 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -89,6 +89,7 @@ public:
   virtual void set_result_field(Field *field) {}
   virtual bool is_result_field() { return 0; }
   virtual void save_in_result_field(bool no_conversions) {}
+  virtual void no_rows_in_result() {}
 };