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WL #3337 (Event scheduler new architecture)

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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.
This commit is contained in:
andrey@lmy004.
2006-07-04 18:44:35 +02:00
parent 6dd9a3bb60
commit 2bdd872e5f
24 changed files with 1198 additions and 531 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
sql/event_data_objects.cc
View File

@ -556,6 +556,7 @@ Event_timed::Event_timed():in_spawned_thread(0),locked_by_thread_id(0),
Event_timed::~Event_timed()
{
deinit_mutexes();
free_root(&mem_root, MYF(0));
if (free_sphead_on_delete)
free_sp();
@ -622,6 +623,8 @@ Event_timed::init()
definer_user.length= definer_host.length= 0;
sql_mode= 0;
/* init memory root */
init_alloc_root(&mem_root, 256, 512);
DBUG_VOID_RETURN;
}
@ -644,7 +647,7 @@ Event_timed::init()
*/
int
Event_timed::load_from_row(MEM_ROOT *mem_root, TABLE *table)
Event_timed::load_from_row(TABLE *table)
{
char *ptr;
Event_timed *et;
@ -661,22 +664,22 @@ Event_timed::load_from_row(MEM_ROOT *mem_root, TABLE *table)
if (table->s->fields != ET_FIELD_COUNT)
goto error;
if ((et->dbname.str= get_field(mem_root, table->field[ET_FIELD_DB])) == NULL)
if ((et->dbname.str= get_field(&mem_root, table->field[ET_FIELD_DB])) == NULL)
goto error;
et->dbname.length= strlen(et->dbname.str);
if ((et->name.str= get_field(mem_root, table->field[ET_FIELD_NAME])) == NULL)
if ((et->name.str= get_field(&mem_root, table->field[ET_FIELD_NAME])) == NULL)
goto error;
et->name.length= strlen(et->name.str);
if ((et->body.str= get_field(mem_root, table->field[ET_FIELD_BODY])) == NULL)
if ((et->body.str= get_field(&mem_root, table->field[ET_FIELD_BODY])) == NULL)
goto error;
et->body.length= strlen(et->body.str);
if ((et->definer.str= get_field(mem_root,
if ((et->definer.str= get_field(&mem_root,
table->field[ET_FIELD_DEFINER])) == NullS)
goto error;
et->definer.length= strlen(et->definer.str);
@ -688,10 +691,10 @@ Event_timed::load_from_row(MEM_ROOT *mem_root, TABLE *table)
len= ptr - et->definer.str;
et->definer_user.str= strmake_root(mem_root, et->definer.str, len);
et->definer_user.str= strmake_root(&mem_root, et->definer.str, len);
et->definer_user.length= len;
len= et->definer.length - len - 1; //1 is because of @
et->definer_host.str= strmake_root(mem_root, ptr + 1, len);/* 1:because of @*/
et->definer_host.str= strmake_root(&mem_root, ptr + 1, len);/* 1:because of @*/
et->definer_host.length= len;
et->starts_null= table->field[ET_FIELD_STARTS]->is_null();
@ -737,21 +740,21 @@ Event_timed::load_from_row(MEM_ROOT *mem_root, TABLE *table)
last_executed_changed= false;
/* ToDo : Andrey . Find a way not to allocate ptr on event_mem_root */
if ((ptr= get_field(mem_root, table->field[ET_FIELD_STATUS])) == NullS)
if ((ptr= get_field(&mem_root, table->field[ET_FIELD_STATUS])) == NullS)
goto error;
DBUG_PRINT("load_from_row", ("Event [%s] is [%s]", et->name.str, ptr));
et->status= (ptr[0]=='E'? Event_timed::ENABLED:Event_timed::DISABLED);
/* ToDo : Andrey . Find a way not to allocate ptr on event_mem_root */
if ((ptr= get_field(mem_root,
if ((ptr= get_field(&mem_root,
table->field[ET_FIELD_ON_COMPLETION])) == NullS)
goto error;
et->on_completion= (ptr[0]=='D'? Event_timed::ON_COMPLETION_DROP:
Event_timed::ON_COMPLETION_PRESERVE);
et->comment.str= get_field(mem_root, table->field[ET_FIELD_COMMENT]);
et->comment.str= get_field(&mem_root, table->field[ET_FIELD_COMMENT]);
if (et->comment.str != NullS)
et->comment.length= strlen(et->comment.str);
else
@ -953,10 +956,10 @@ Event_timed::compute_next_execution_time()
int tmp;
DBUG_ENTER("Event_timed::compute_next_execution_time");
DBUG_PRINT("enter", ("starts=%llu ends=%llu last_executed=%llu",
DBUG_PRINT("enter", ("starts=%llu ends=%llu last_executed=%llu this=%p",
TIME_to_ulonglong_datetime(&starts),
TIME_to_ulonglong_datetime(&ends),
TIME_to_ulonglong_datetime(&last_executed)));
TIME_to_ulonglong_datetime(&last_executed), this));
if (status == Event_timed::DISABLED)
{
@ -1168,7 +1171,8 @@ Event_timed::compute_next_execution_time()
goto ret;
}
ret:
DBUG_PRINT("info", ("ret=0"));
DBUG_PRINT("info", ("ret=0 execute_at=%llu",
TIME_to_ulonglong_datetime(&execute_at)));
DBUG_RETURN(false);
err:
DBUG_PRINT("info", ("ret=1"));
@ -1392,6 +1396,7 @@ Event_timed::get_create_event(THD *thd, String *buf)
int
Event_timed::execute(THD *thd, MEM_ROOT *mem_root)
{
Security_context *save_ctx;
/* this one is local and not needed after exec */
Security_context security_ctx;
int ret= 0;
@ -1400,14 +1405,8 @@ Event_timed::execute(THD *thd, MEM_ROOT *mem_root)
DBUG_PRINT("info", (" EVEX EXECUTING event %s.%s [EXPR:%d]",
dbname.str, name.str, (int) expression));
VOID(pthread_mutex_lock(&this->LOCK_running));
if (running)
{
VOID(pthread_mutex_unlock(&this->LOCK_running));
DBUG_RETURN(-100);
}
running= true;
VOID(pthread_mutex_unlock(&this->LOCK_running));
thd->change_security_context(definer_user, definer_host, dbname,
&security_ctx, &save_ctx);
if (!sphead && (ret= compile(thd, mem_root)))
goto done;
@ -1434,14 +1433,11 @@ Event_timed::execute(THD *thd, MEM_ROOT *mem_root)
definer_host.str, dbname.str));
ret= -99;
}
VOID(pthread_mutex_lock(&this->LOCK_running));
running= false;
/* Will compile every time a new sp_head on different root */
free_sp();
VOID(pthread_mutex_unlock(&this->LOCK_running));
done:
thd->restore_security_context(save_ctx);
/*
1. Don't cache sphead if allocated on another mem_root
2. Don't call security_ctx.destroy() because this will free our dbname.str
@ -1807,3 +1803,4 @@ event_timed_identifier_equal(LEX_STRING db, LEX_STRING name, Event_timed *b)
return !sortcmp_lex_string(name, b->name, system_charset_info) &&
!sortcmp_lex_string(db, b->dbname, system_charset_info);
}