Merge weblab.(none):/home/marcsql/TREE/mysql-5.0-8407_b

into  weblab.(none):/home/marcsql/TREE/mysql-5.1-8407-merge


mysql-test/r/information_schema_db.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/lock.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sp_head.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged

1 files changed, 32 insertions, 0 deletions

diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 6673ed1ddf0..cdb75e763b6 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -309,6 +309,38 @@ THD::THD()
   substitute_null_with_insert_id = FALSE;
   thr_lock_info_init(&lock_info); /* safety: will be reset after start */
   thr_lock_owner_init(&main_lock_id, &lock_info);
+
+  m_internal_handler= NULL;
+}
+
+
+void THD::push_internal_handler(Internal_error_handler *handler)
+{
+  /*
+    TODO: The current implementation is limited to 1 handler at a time only.
+    THD and sp_rcontext need to be modified to use a common handler stack.
+  */
+  DBUG_ASSERT(m_internal_handler == NULL);
+  m_internal_handler= handler;
+}
+
+
+bool THD::handle_error(uint sql_errno,
+                       MYSQL_ERROR::enum_warning_level level)
+{
+  if (m_internal_handler)
+  {
+    return m_internal_handler->handle_error(sql_errno, level, this);
+  }
+
+  return FALSE;                                 // 'FALSE', as per coding style
+}
+
+
+void THD::pop_internal_handler()
+{
+  DBUG_ASSERT(m_internal_handler != NULL);
+  m_internal_handler= NULL;
 }