WL#3337 (Event scheduler new architecture)

More small fixes to the API : use LEX_STRING instead of LEX_STRING* and if error
then return bool(true) instead of error code.
Merged functions. Reduced usage of sp_name.
Fixed a lot of function documentation errors.
Added function documentation wherever needed.
Removed some unused defines and error codes.

Next to come is batch rename of Event_scheduler_ng to Event_scheduler.


mysql-test/r/events.result:
  update result
mysql-test/r/events_logs_tests.result:
  update result
mysql-test/t/events.test:
  more test coverage
mysql-test/t/events_logs_tests.test:
  fix test
sql/event_data_objects.cc:
  Cosmetics.
  Fix function documentation whenever needed.
  Move Event_job_data::compile() next to Event_job_data::execute()
sql/event_data_objects.h:
  Remove unneeded error codes and defines
  Move function declarations at the end of the header
sql/event_db_repository.cc:
  Fix function documentation.
  Event_db_repository::update_event() now uses LEX_STRING *-s instead of
  sp_name . Lower coupling.
sql/event_db_repository.h:
  Event_db_repository::update_event() now uses LEX_STRING *-s instead of
  sp_name . Lower coupling.
  find_event -> find_named_event
  find_event_by_name is not used externally, merge with load_named_event()
sql/event_queue.cc:
  LEX_STRING* to LEX_STRING
  Fix comments.
  Fix and add function documentation.
  Remove Event_queue::events_count() as it is unused
  Change get_top_for_execution_if_time() to return status code as return value
  and the object is in out parameter.
sql/event_queue.h:
  LEX_STRING* to LEX_STRING
  Fix comments.
  Fix and add function documentation.
  Remove Event_queue::events_count() as it is unused
  Change get_top_for_execution_if_time() to return status code as return value
  and the object is in out parameter.
  Try to detect also lock attemptions for deadlocks.
sql/event_scheduler_ng.cc:
  Always execute on thd->mem_root
  Fix according to changed API of Event_queue::get_top_for_execution_if_time()
sql/events.cc:
  Fix function documentation.
  Fix code after API changes of internal Event module classes.
sql/events.h:
  sp_name -> LEX_STRINGs
sql/sql_parse.cc:
  Fix according to changed API of Events::show_create_event()
sql/sql_yacc.yy:
  Don't pass NULL as third parameter to sp_head::init_strings()

1 files changed, 16 insertions, 36 deletions

diff --git a/sql/event_data_objects.h b/sql/event_data_objects.h
index d405cafe42d..e20d698161e 100644
--- a/sql/event_data_objects.h
+++ b/sql/event_data_objects.h
@@ -17,45 +17,16 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
 
-#define EVEX_OK                  0
-#define EVEX_KEY_NOT_FOUND      -1
-#define EVEX_OPEN_TABLE_FAILED  -2
-#define EVEX_WRITE_ROW_FAILED   -3
-#define EVEX_DELETE_ROW_FAILED  -4
-#define EVEX_GET_FIELD_FAILED   -5
-#define EVEX_PARSE_ERROR        -6
-#define EVEX_INTERNAL_ERROR     -7
-#define EVEX_NO_DB_ERROR        -8
-#define EVEX_COMPILE_ERROR     -19
-#define EVEX_GENERAL_ERROR     -20
-#define EVEX_BAD_IDENTIFIER    -21 
-#define EVEX_BODY_TOO_LONG     -22
-#define EVEX_BAD_PARAMS        -23
-#define EVEX_NOT_RUNNING       -24
-#define EVEX_MICROSECOND_UNSUP -25
-#define EVEX_CANT_KILL         -26
-
-#define EVENT_EXEC_NO_MORE      (1L << 0)
-#define EVENT_NOT_USED          (1L << 1)
-#define EVENT_FREE_WHEN_FINISHED (1L << 2)
-
-
-#define EVENT_EXEC_STARTED      0
-#define EVENT_EXEC_ALREADY_EXEC 1
-#define EVENT_EXEC_CANT_FORK    2
+#define EVEX_GET_FIELD_FAILED   -2
+#define EVEX_COMPILE_ERROR      -3
+#define EVEX_GENERAL_ERROR      -4
+#define EVEX_BAD_PARAMS         -5
+#define EVEX_MICROSECOND_UNSUP  -6
 
 
 class sp_head;
 class Sql_alloc;
-class Event_basic;
 
-/* Compares only the schema part of the identifier */
-bool
-event_basic_db_equal( LEX_STRING *db, Event_basic *et);
-
-/* Compares the whole identifier*/
-bool
-event_basic_identifier_equal(LEX_STRING db, LEX_STRING name, Event_basic *b);
 
 class Event_basic
 {
@@ -206,7 +177,7 @@ public:
   load_from_row(TABLE *table);
 
   int
-  execute(THD *thd, MEM_ROOT *mem_root);
+  execute(THD *thd);
 private:
   int
   get_fake_create_event(THD *thd, String *buf);
@@ -274,7 +245,7 @@ public:
 
 private:
 
-  int
+  void
   init_definer(THD *thd);
 
   void
@@ -303,4 +274,13 @@ private:
 };
 
 
+/* Compares only the schema part of the identifier */
+bool
+event_basic_db_equal(LEX_STRING db, Event_basic *et);
+
+/* Compares the whole identifier*/
+bool
+event_basic_identifier_equal(LEX_STRING db, LEX_STRING name, Event_basic *b);
+
+
 #endif /* _EVENT_DATA_OBJECTS_H_ */