Merge tulin@bk-internal.mysql.com:/home/bk/mysql-5.0

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

sql/parse_file.cc

@@ -719,14 +719,18 @@ nlist_err:
 
 /*
   parse parameters
- 
+
   SYNOPSIS
     File_parser::parse()
     base                base address for parameter writing (structure like
                         TABLE)
     mem_root            MEM_ROOT for parameters allocation
     parameters          parameters description
-    required            number of required parameters in above list
+    required            number of parameters in the above list. If the file
+                        contains more parameters than "required", they will
+                        be ignored. If the file contains less parameters
+                        then "required", non-existing parameters will
+                        remain their values.
     hook                hook called for unknown keys
     hook_data           some data specific for the hook
 
@@ -909,6 +913,13 @@ list_err:
       }
     }
   }
+
+  /*
+    NOTE: if we read less than "required" parameters, it is still Ok.
+    Probably, we've just read the file of the previous version, which
+    contains less parameters.
+  */
+
   DBUG_RETURN(FALSE);
 }
 

sql/sp_head.cc

@@ -954,6 +954,12 @@ sp_head::execute(THD *thd)
                m_first_instance->m_last_cached_sp == this) ||
               (m_recursion_level + 1 == m_next_cached_sp->m_recursion_level));
 
+  /*
+    NOTE: The SQL Standard does not specify the context that should be
+    preserved for stored routines. However, at SAP/Walldorf meeting it was
+    decided that current database should be preserved.
+  */
+
   if (m_db.length &&
       (err_status= sp_use_new_db(thd, m_db, &old_db, 0, &dbchanged)))
     goto done;