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The following statements support the CURRENT_USER() where a user is needed.

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DROP USER 
RENAME USER CURRENT_USER() ...
GRANT ... TO CURRENT_USER()
REVOKE ... FROM CURRENT_USER()
ALTER DEFINER = CURRENT_USER() EVENTbut, When these statements are binlogged, CURRENT_USER() just is binlogged
as 'CURRENT_USER()', it is not expanded to the real user name. When slave 
executes the log event, 'CURRENT_USER()' is expand to the user of slave 
SQL thread, but SQL thread's user name always NULL. This breaks the replication.

After this patch, session's user will be written into query log events 
if these statements call CURREN_USER() or 'ALTER EVENT' does not assign a definer.
This commit is contained in:
2010-07-04 12:02:49 +08:00
parent fb8df6c7b4
commit 42eecc539a
12 changed files with 634 additions and 21 deletions
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20
sql/sql_class.cc
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@@ -736,6 +736,9 @@ THD::THD()
thr_lock_owner_init(&main_lock_id, &lock_info);
m_internal_handler= NULL;
current_user_used= FALSE;
memset(&invoker_user, 0, sizeof(invoker_user));
memset(&invoker_host, 0, sizeof(invoker_host));
}
@@ -1236,6 +1239,7 @@ void THD::cleanup_after_query()
where= THD::DEFAULT_WHERE;
/* reset table map for multi-table update */
table_map_for_update= 0;
clean_current_user_used();
}
@@ -3267,6 +3271,22 @@ void THD::set_query(char *query_arg, uint32 query_length_arg)
pthread_mutex_unlock(&LOCK_thd_data);
}
void THD::get_definer(LEX_USER *definer)
{
set_current_user_used();
#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
if (slave_thread && has_invoker())
{
definer->user = invoker_user;
definer->host= invoker_host;
definer->password.str= NULL;
definer->password.length= 0;
}
else
#endif
get_default_definer(this, definer);
}
/**
Mark transaction to rollback and mark error as fatal to a sub-statement.