1 files changed, 9 insertions, 1 deletions
diff --git a/sql/field.h b/sql/field.h
index 0d0d7fba116..aa69fea6bdd 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -1597,8 +1597,16 @@ private:
 
 class Field_blob :public Field_longstr {
 protected:
+  /**
+    The number of bytes used to represent the length of the blob.
+  */
   uint packlength;
-  String value;				// For temporaries
+  
+  /**
+    The 'value'-object is a cache fronting the storage engine.
+  */
+  String value;
+  
 public:
   Field_blob(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
 	     enum utype unireg_check_arg, const char *field_name_arg,