WL #3337 (Event scheduler new architecture)

Cut Nr. 8.

All tests pass.

Separated Event_scheduler into Event_queue and Event_scheduler.
Added new Event_scheduler_ng which is the new scheduler and is used
system-wide. Will be moved to the event_scheduler.cc in the future.
Using Event_timed in Event_queue as well as cloned during execution.
Next step is to have Event_worker_data which will be used during execution
and will take ::compile()/::execute() out of Event_timed.


mysql-test/r/events.result:
  update result
mysql-test/r/events_bugs.result:
  update result
mysql-test/r/ps_1general.result:
  update result
mysql-test/r/skip_name_resolve.result:
  update result
mysql-test/r/sp-threads.result:
  update result
mysql-test/r/sp_notembedded.result:
  update result
mysql-test/r/status.result:
  update result
mysql-test/t/events_stress.test:
  Make event_stress a bit longer
sql/Makefile.am:
  Add new event_scheduler_ng.h/cc . These are only to be in the experimental
  clone. Later their content will be moved to event_scheduler.h/cc
sql/event_data_objects.cc:
  Allocate strings memory on own memory root, instead
  on the schedulers. Thus don't "leak" memory. This should
  fix bug#18683 memory leak in event scheduler
sql/event_data_objects.h:
  add mem_root
  add THD - this is only temporal, will be moved to class Event_job_data
  once Event_job_data is responsible for the execution.
sql/event_db_repository.cc:
  Remove unused code.
  Cosmetic changes
sql/event_queue.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/event_queue.h:
  Now use the Event_scheduler_ng (NextGen)
sql/event_scheduler.cc:
  This file is no more used, but will be soon.
sql/event_scheduler.h:
  This file is no more used but will be soon
sql/events.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/events.h:
  Now use the Event_scheduler_ng (NextGen)
sql/mysqld.cc:
  Make it again possible to kill the scheduler thread
sql/set_var.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/share/errmsg.txt:
  Shorten the message.
sql/sql_show.cc:
  Loading is on a own root, then don't use thd->mem_root

1 files changed, 30 insertions, 3 deletions

diff --git a/sql/event_data_objects.h b/sql/event_data_objects.h
index d8df8dd1e6c..5ae5c7e81ab 100644
--- a/sql/event_data_objects.h
+++ b/sql/event_data_objects.h
@@ -72,8 +72,11 @@ class Event_timed
 
   bool status_changed;
   bool last_executed_changed;
+  
+  MEM_ROOT mem_root;
 
 public:
+  THD *thd;
   enum enum_status
   {
     ENABLED = 1,
@@ -147,7 +150,7 @@ public:
   deinit_mutexes();
 
   int
-  load_from_row(MEM_ROOT *mem_root, TABLE *table);
+  load_from_row(TABLE *table);
 
   bool
   compute_next_execution_time();
@@ -264,9 +267,33 @@ public:
 };
 
 
-class Event_queue_element : public Event_timed
+class Event_job_data
 {
+public:
+  LEX_STRING dbname;
+  LEX_STRING name;
+  sp_head *sphead;
+  LEX_STRING definer;
+  LEX_STRING body;
+  ulong sql_mode;
 
-};
+  THD *thd;
+  
+  Event_job_data(){}
+  ~Event_job_data(){}
 
+  int
+  execute();
+
+private:
+  int
+  load_from_disk();
+  
+  int
+  compile();
+
+
+  Event_job_data(const Event_job_data &);	/* Prevent use of these */
+  void operator=(Event_job_data &);
+};
 #endif /* _EVENT_DATA_OBJECTS_H_ */