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Here comes a nasty patch, although I am not ready to push it yet. I will

Browse Source 
first pull, merge,test, and get it to work.

The main change is the new replication code - now we have two slave threads
SQL thread and I/O thread. I have also re-written a lot of the code to 
prepare for multi-master implementation. 

I also documented IO_CACHE quite extensively and to some extend, THD class.
This commit is contained in:
sasha@mysql.sashanet.com
2002-01-19 19:16:52 -07:00
parent f481272998
commit 56129ce634
39 changed files with 2464 additions and 1032 deletions
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51
sql/sql_parse.cc
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@@ -1220,14 +1220,18 @@ mysql_execute_command(void)
{
if (check_access(thd, PROCESS_ACL, any_db))
goto error;
res = change_master(thd);
LOCK_ACTIVE_MI;
res = change_master(thd,active_mi);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SHOW_SLAVE_STAT:
{
if (check_process_priv(thd))
goto error;
res = show_master_info(thd);
LOCK_ACTIVE_MI;
res = show_master_info(thd,active_mi);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SHOW_MASTER_STAT:
@@ -1245,7 +1249,7 @@ mysql_execute_command(void)
break;
case SQLCOM_LOAD_MASTER_TABLE:
{
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,CREATE_ACL,tables->db,&tables->grant.privilege))
@@ -1265,12 +1269,16 @@ mysql_execute_command(void)
net_printf(&thd->net,ER_WRONG_TABLE_NAME,tables->name);
break;
}
if (fetch_nx_table(thd, tables->db, tables->real_name, &glob_mi, 0))
break; // fetch_nx_table did send the error to the client
send_ok(&thd->net);
LOCK_ACTIVE_MI;
// fetch_master_table will send the error to the client on failure
if (!fetch_master_table(thd, tables->db, tables->real_name,
active_mi, 0))
{
send_ok(&thd->net);
}
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_CREATE_TABLE:
if (!tables->db)
tables->db=thd->db;
@@ -1368,12 +1376,19 @@ mysql_execute_command(void)
break;
case SQLCOM_SLAVE_START:
start_slave(thd);
{
LOCK_ACTIVE_MI;
start_slave(thd,active_mi,1 /* net report*/);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SLAVE_STOP:
stop_slave(thd);
{
LOCK_ACTIVE_MI;
stop_slave(thd,active_mi,1/* net report*/);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_ALTER_TABLE:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
send_error(&thd->net,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
@@ -2967,6 +2982,7 @@ bool reload_acl_and_cache(THD *thd, uint options, TABLE_LIST *tables)
bool result=0;
select_errors=0; /* Write if more errors */
// TODO: figure out what's up with the commented out line below
// mysql_log.flush(); // Flush log
if (options & REFRESH_GRANT)
{
@@ -2998,10 +3014,15 @@ bool reload_acl_and_cache(THD *thd, uint options, TABLE_LIST *tables)
if (options & REFRESH_THREADS)
flush_thread_cache();
if (options & REFRESH_MASTER)
reset_master();
if (reset_master(thd))
result=1;
if (options & REFRESH_SLAVE)
reset_slave();
{
LOCK_ACTIVE_MI;
if (reset_slave(active_mi))
result=1;
UNLOCK_ACTIVE_MI;
}
return result;
}
@@ -3019,7 +3040,7 @@ void kill_one_thread(THD *thd, ulong id)
if ((thd->master_access & PROCESS_ACL) ||
!strcmp(thd->user,tmp->user))
{
tmp->prepare_to_die();
tmp->awake(1 /*prepare to die*/);
error=0;
}
else