diff options
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index d0ee489aa82..12aaf0a7e7d 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -815,30 +815,26 @@ static Sys_var_ulong Sys_delayed_queue_size( VALID_RANGE(1, UINT_MAX), DEFAULT(DELAYED_QUEUE_SIZE), BLOCK_SIZE(1)); #ifdef HAVE_EVENT_SCHEDULER -static const char *event_scheduler_names[]= { "OFF", "ON", "DISABLED", NullS }; +static const char *event_scheduler_names[]= { "OFF", "ON", "DISABLED", + "ORIGINAL", NullS }; static bool event_scheduler_check(sys_var *self, THD *thd, set_var *var) { - /* DISABLED is only accepted on the command line */ - if (var->save_result.ulonglong_value == Events::EVENTS_DISABLED) - return true; - /* - If the scheduler was disabled because there are no/bad - system tables, produce a more meaningful error message - than ER_OPTION_PREVENTS_STATEMENT - */ - if (Events::check_if_system_tables_error()) - return true; if (Events::opt_event_scheduler == Events::EVENTS_DISABLED) { my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--event-scheduler=DISABLED or --skip-grant-tables"); return true; } + /* DISABLED is only accepted on the command line */ + if (var->save_result.ulonglong_value == Events::EVENTS_DISABLED) + return true; return false; } + static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type) { int err_no= 0; + bool ret; uint opt_event_scheduler_value= Events::opt_event_scheduler; mysql_mutex_unlock(&LOCK_global_system_variables); /* @@ -857,9 +853,25 @@ static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type) rare and it's difficult to avoid it without opening up possibilities for deadlocks. See bug#51160. */ - bool ret= opt_event_scheduler_value == Events::EVENTS_ON - ? Events::start(&err_no) - : Events::stop(); + + /* EVENTS_ORIGINAL means we should revert back to the startup state */ + if (opt_event_scheduler_value == Events::EVENTS_ORIGINAL) + { + opt_event_scheduler_value= Events::opt_event_scheduler= + Events::startup_state; + } + + /* + If the scheduler was not properly inited (because of wrong system tables), + try to init it again. This is needed for mysql_upgrade to work properly if + the event tables where upgraded. + */ + if (!Events::inited && (Events::init(thd, 0) || !Events::inited)) + ret= 1; + else + ret= opt_event_scheduler_value == Events::EVENTS_ON ? + Events::start(&err_no) : + Events::stop(); mysql_mutex_lock(&LOCK_global_system_variables); if (ret) { |