1 files changed, 6 insertions, 1 deletions
diff --git a/sql/sql_plist.h b/sql/sql_plist.h
index 1274a5a78c0..574a151f956 100644
--- a/sql/sql_plist.h
+++ b/sql/sql_plist.h
@@ -186,7 +186,12 @@ public:
     list= &a;
     current= a.m_first;
   }
-  /* Operator for it++ */
+  /**
+    Operator for it++
+
+    @note since we save next element pointer, caller may remove current element.
+    Such modification doesn't invalidate iterator.
+  */
   inline T* operator++(int)
   {
     T *result= current;