Fixed bug mdev-4250.

This is a bug in the legacy code. It did not manifest itself because
it was masked by other bugs that were fixed by the patches for
mdev-4172 and mdev-4177.

1 files changed, 9 insertions, 0 deletions

diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 33f147b7b0f..1b8687cfcfc 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -1798,6 +1798,15 @@ public:
   { 
     upper_levels= 0;
   }
+  void copy(COND_EQUAL &cond_equal)
+  {
+    max_members= cond_equal.max_members;
+    upper_levels= cond_equal.upper_levels;
+    if (cond_equal.current_level.is_empty())
+      current_level.empty();
+    else
+      current_level= cond_equal.current_level;
+  }
 };