WL#3337 (Event scheduler new architecture)

Cleaned up the code a bit. Fixed few leaks.
This code still does not load events on server startup
from disk. The problem is that there is a need for a THD instance, which
does not exist during server boot. This will be solved soon.
Still Event_timed is used both for the memory queue and for exectution.
This will be changed according to WL#3337 probably in the next commit.


sql/event_data_objects.cc:
  Strip unneeded stuff from class Event_timed
  Event_timed is still used for the queue and execution.
  That will be changed in the next commit.
sql/event_data_objects.h:
  Strip unneeded stuff from class Event_timed
  Event_timed is still used for the queue and execution.
  That will be changed in the next commit.
sql/event_db_repository.cc:
  Cosmetics.
  Add a new method load_named_event_job, to be made complete in the 
  next commit. It will load from disk an instance of Event_job_data to
  be used during execution.
sql/event_db_repository.h:
  find_event does not need MEM_ROOT anymore
  because the memory is allocated on Event's own root.
sql/event_queue.cc:
  Remove dead code.
  Move dumping of the queue to separate method.
  Make critical sections in create_event & update_event
  as small as possible - load the new event outside of the section
  and free the object also outside of it.
sql/event_queue.h:
  init -> init_queue -> easier for ctags
  deinit -> deinit_queue -> easier for ctags
sql/event_scheduler.cc:
  empty this file
sql/event_scheduler.h:
  empty this file
sql/event_scheduler_ng.cc:
  add back DBUG_RETURN(0) in thread handlers.
  We don't stop running events when stopping the scheduler. Therefore
  remove this method now. If it is needed later it can be added back.
sql/event_scheduler_ng.h:
  Remove stop_all_running_threads()
  init -> init_scheduler
  deinit -> deinit_scheduler
  easier for ctags
sql/events.cc:
  Cosmetics
sql/events.h:
  Cosmetics
sql/set_var.cc:
  Remove references to dead code
sql/sql_parse.cc:
  Reorganize a bit.

1 files changed, 4 insertions, 4 deletions

diff --git a/sql/events.h b/sql/events.h
index 357312b44d1..bb9fe7a8fc5 100644
--- a/sql/events.h
+++ b/sql/events.h
@@ -75,7 +75,7 @@ public:
   get_instance();
 
   int
-  create_event(THD *thd, Event_parse_data *parse_data, uint create_options,
+  create_event(THD *thd, Event_parse_data *parse_data, bool if_exists,
                uint *rows_affected);
 
   int
@@ -83,7 +83,7 @@ public:
                uint *rows_affected);
 
   int
-  drop_event(THD *thd, sp_name *name, bool drop_if_exists, uint *rows_affected);
+  drop_event(THD *thd, sp_name *name, bool if_exists, uint *rows_affected);
 
   int
   drop_schema_events(THD *thd, char *db);
@@ -105,9 +105,9 @@ public:
   int
   dump_internal_status(THD *thd);
 
+  Event_queue         *event_queue;
+  Event_scheduler_ng  *scheduler_ng;
   Event_db_repository *db_repository;
-  Event_queue *event_queue;
-  Event_scheduler_ng *scheduler_ng;
 
 private:
   /* Singleton DP is used */