WL#3337 (Event scheduler new architecture)

Don't send affected rows after CREATE/ALTER/DROP EVENT as this is
inconsistent with the rest of the server in terms of CREATE/ALTER/DROP
DDLs


sql/event_data_objects.cc:
  Events::drop_event() does not expect anymore a parameter named affected_rows
sql/event_db_repository.cc:
  Remove rows_affected as the behavior exposed by Events is not
  coherent with the behavior of many other DDL, like CREATE PROCEDURE, etc.
sql/event_db_repository.h:
  Remove rows_affected as the behavior exposed by Events is not
  coherent with the behavior of many other DDL, like CREATE PROCEDURE, etc.
sql/events.cc:
  Remove rows_affected as the behavior exposed by Events is not
  coherent with the behavior of many other DDL, like CREATE PROCEDURE, etc.
sql/events.h:
  Remove rows_affected as the behavior exposed by Events is not
  coherent with the behavior of many other DDL, like CREATE PROCEDURE, etc.
sql/sql_parse.cc:
  Don't send affected rows, because this behavior is not consistent
  with the rest of the server for CREATE/ALTER/DROP DDLs

sql/event_data_objects.cc

@@ -1437,11 +1437,10 @@ Event_queue_element::mark_last_executed(THD *thd)
 int
 Event_queue_element::drop(THD *thd)
 {
-  uint tmp= 0;
   DBUG_ENTER("Event_queue_element::drop");
 
   DBUG_RETURN(Events::get_instance()->
-                    drop_event(thd, dbname, name, FALSE, &tmp, TRUE));
+                    drop_event(thd, dbname, name, FALSE, TRUE));
 }
 
 

sql/event_db_repository.cc

@@ -508,7 +508,6 @@ check_parse_params(THD *thd, Event_parse_data *parse_data)
       thd             [in]  THD
       parse_data      [in]  Object containing info about the event
       create_if_not   [in]  Whether to generate anwarning in case event exists
-      rows_affected   [out] How many rows were affected
 
   RETURN VALUE
     0                   OK
@@ -521,7 +520,7 @@ check_parse_params(THD *thd, Event_parse_data *parse_data)
 
 bool
 Event_db_repository::create_event(THD *thd, Event_parse_data *parse_data,
-                                  my_bool create_if_not, uint *rows_affected)
+                                  my_bool create_if_not)
 {
   int ret= 0;
   CHARSET_INFO *scs= system_charset_info;
@@ -532,7 +531,6 @@ Event_db_repository::create_event(THD *thd, Event_parse_data *parse_data,
 
   DBUG_ENTER("Event_db_repository::create_event");
 
-  *rows_affected= 0;
   if (check_parse_params(thd, parse_data))
     goto err;
 
@@ -621,7 +619,6 @@ Event_db_repository::create_event(THD *thd, Event_parse_data *parse_data,
     goto err;
   }
 
-  *rows_affected= 1;
 ok:
   if (dbchanged)
     (void) mysql_change_db(thd, old_db.str, 1);
@@ -760,7 +757,6 @@ Event_db_repository::update_event(THD *thd, Event_parse_data *parse_data,
       name            [in]  Event's name
       drop_if_exists  [in]  If set and the event not existing => warning
                             onto the stack
-      rows_affected   [out] Affected number of rows is returned heres
 
   RETURN VALUE
     FALSE  OK
@@ -769,7 +765,7 @@ Event_db_repository::update_event(THD *thd, Event_parse_data *parse_data,
 
 bool
 Event_db_repository::drop_event(THD *thd, LEX_STRING db, LEX_STRING name,
-                                bool drop_if_exists, uint *rows_affected)
+                                bool drop_if_exists)
 {
   TABLE *table= NULL;
   Open_tables_state backup;

sql/event_db_repository.h

@@ -56,16 +56,14 @@ class Event_db_repository
   Event_db_repository(){}
 
   bool
-  create_event(THD *thd, Event_parse_data *parse_data, my_bool create_if_not,
-               uint *rows_affected);
+  create_event(THD *thd, Event_parse_data *parse_data, my_bool create_if_not);
 
   bool
   update_event(THD *thd, Event_parse_data *parse_data, LEX_STRING *new_dbname,
                LEX_STRING *new_name);
 
   bool 
-  drop_event(THD *thd, LEX_STRING db, LEX_STRING name, bool drop_if_exists,
-             uint *rows_affected);
+  drop_event(THD *thd, LEX_STRING db, LEX_STRING name, bool drop_if_exists);
 
   void
   drop_schema_events(THD *thd, LEX_STRING schema);

sql/events.cc

@@ -304,7 +304,6 @@ Events::open_event_table(THD *thd, enum thr_lock_type lock_type,
       thd            [in]  THD
       parse_data     [in]  Event's data from parsing stage
       if_not_exists  [in]  Whether IF NOT EXISTS was specified in the DDL
-      rows_affected  [out] How many rows were affected
 
   RETURN VALUE
     FALSE  OK
@@ -316,8 +315,7 @@ Events::open_event_table(THD *thd, enum thr_lock_type lock_type,
 */
 
 bool
-Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists,
-                     uint *rows_affected)
+Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists)
 {
   int ret;
   DBUG_ENTER("Events::create_event");
@@ -329,8 +327,7 @@ Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists,
 
   pthread_mutex_lock(&LOCK_event_metadata);
   /* On error conditions my_error() is called so no need to handle here */
-  if (!(ret= db_repository->create_event(thd, parse_data, if_not_exists,
-                                         rows_affected)))
+  if (!(ret= db_repository->create_event(thd, parse_data, if_not_exists)))
   {
     if ((ret= event_queue->create_event(thd, parse_data->dbname,
                                         parse_data->name)))
@@ -353,7 +350,6 @@ Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists,
       thd           [in]  THD
       parse_data    [in]  Event's data from parsing stage
       rename_to     [in]  Set in case of RENAME TO.
-      rows_affected [out] How many rows were affected.
 
   RETURN VALUE
     FALSE  OK
@@ -366,8 +362,7 @@ Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists,
 */
 
 bool
-Events::update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to,
-                     uint *rows_affected)
+Events::update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to)
 {
   int ret;
   DBUG_ENTER("Events::update_event");
@@ -406,7 +401,6 @@ Events::update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to,
       name            [in]  Event's name
       if_exists       [in]  When set and the event does not exist =>
                             warning onto the stack
-      rows_affected   [out] Affected number of rows is returned here
       only_from_disk  [in]  Whether to remove the event from the queue too.
                             In case of Event_job_data::drop() it's needed to
                             do only disk drop because Event_queue will handle
@@ -419,7 +413,7 @@ Events::update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to,
 
 bool
 Events::drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name, bool if_exists,
-                   uint *rows_affected, bool only_from_disk)
+                   bool only_from_disk)
 {
   int ret;
   DBUG_ENTER("Events::drop_event");
@@ -431,8 +425,7 @@ Events::drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name, bool if_exists,
 
   pthread_mutex_lock(&LOCK_event_metadata);
   /* On error conditions my_error() is called so no need to handle here */
-  if (!(ret= db_repository->drop_event(thd, dbname, name, if_exists,
-                                       rows_affected)))
+  if (!(ret= db_repository->drop_event(thd, dbname, name, if_exists)))
   {
     if (!only_from_disk)
       event_queue->drop_event(thd, dbname, name);

sql/events.h

@@ -77,16 +77,14 @@ class Events
   get_instance();
 
   bool
-  create_event(THD *thd, Event_parse_data *parse_data, bool if_exists,
-               uint *rows_affected);
+  create_event(THD *thd, Event_parse_data *parse_data, bool if_exists);
 
   bool
-  update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to,
-               uint *rows_affected);
+  update_event(THD *thd, Event_parse_data *parse_data, sp_name *rename_to);
 
   bool
   drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name, bool if_exists,
-             uint *rows_affected, bool only_from_disk);
+             bool only_from_disk);
 
   void
   drop_schema_events(THD *thd, char *db);

sql/sql_parse.cc

@@ -3897,24 +3897,23 @@ mysql_execute_command(THD *thd)
   case SQLCOM_CREATE_EVENT:
   case SQLCOM_ALTER_EVENT:
   {
-    uint affected= 1;
     DBUG_ASSERT(lex->event_parse_data);
     switch (lex->sql_command) {
     case SQLCOM_CREATE_EVENT:
       res= Events::get_instance()->
             create_event(thd, lex->event_parse_data,
-                         lex->create_info.options & HA_LEX_CREATE_IF_NOT_EXISTS,
-                         &affected);
+                         lex->create_info.options & HA_LEX_CREATE_IF_NOT_EXISTS);
       break;
     case SQLCOM_ALTER_EVENT:
-      res= Events::get_instance()->
-             update_event(thd, lex->event_parse_data, lex->spname, &affected);
+      res= Events::get_instance()->update_event(thd, lex->event_parse_data,
+                                                lex->spname);
       break;
-    default:;
+    default:
+      DBUG_ASSERT(0);
     }
-    DBUG_PRINT("info",("DDL error code=%d affected=%d", res, affected));
+    DBUG_PRINT("info",("DDL error code=%d", res));
     if (!res)
-      send_ok(thd, affected);
+      send_ok(thd);
 
     /* Don't do it, if we are inside a SP */
     if (!thd->spcont)
@@ -3956,9 +3955,8 @@ mysql_execute_command(THD *thd)
                                                     lex->spname->m_db,
                                                     lex->spname->m_name,
                                                     lex->drop_if_exists,
-                                                    &affected,
                                                     FALSE)))
-        send_ok(thd, affected);     
+        send_ok(thd);
     }
     break;
   }