1 files changed, 13 insertions, 0 deletions
diff --git a/sql/item.h b/sql/item.h
index ac4a42107cb..4fbb7324570 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -1271,6 +1271,12 @@ public:
   */
   inline ulonglong val_uint() { return (ulonglong) val_int(); }
 
+  virtual bool hash_not_null(Hasher *hasher)
+  {
+    DBUG_ASSERT(0);
+    return true;
+  }
+
   /*
     Return string representation of this item object.
 
@@ -3460,6 +3466,13 @@ public:
   {
     return Sql_mode_dependency(0, field->value_depends_on_sql_mode());
   }
+  bool hash_not_null(Hasher *hasher)
+  {
+    if (field->is_null())
+      return true;
+    field->hash_not_null(hasher);
+    return false;
+  }
   longlong val_int_endpoint(bool left_endp, bool *incl_endp);
   bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate);
   bool get_date_result(THD *thd, MYSQL_TIME *ltime,date_mode_t fuzzydate);