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A pre-requisite patch for the fix for Bug#52044.

Browse Source 
This patch also fixes Bug#55452 "SET PASSWORD is
replicated twice in RBR mode".

The goal of this patch is to remove the release of 
metadata locks from close_thread_tables().
This is necessary to not mistakenly release
the locks in the course of a multi-step
operation that involves multiple close_thread_tables()
or close_tables_for_reopen().

On the same token, move statement commit outside 
close_thread_tables().

Other cleanups:
Cleanup COM_FIELD_LIST.
Don't call close_thread_tables() in COM_SHUTDOWN -- there
are no open tables there that can be closed (we leave
the locked tables mode in THD destructor, and this
close_thread_tables() won't leave it anyway).

Make open_and_lock_tables() and open_and_lock_tables_derived()
call close_thread_tables() upon failure.
Remove the calls to close_thread_tables() that are now
unnecessary.

Simplify the back off condition in Open_table_context.

Streamline metadata lock handling in LOCK TABLES 
implementation.

Add asserts to ensure correct life cycle of 
statement transaction in a session.

Remove a piece of dead code that has also become redundant
after the fix for Bug 37521.
This commit is contained in:
Konstantin Osipov
2010-07-27 14:25:53 +04:00
parent c67cf159e9
commit ec2c3bf2c1
42 changed files with 590 additions and 468 deletions
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19
sql/ha_ndbcluster_binlog.cc
View File

@ -298,13 +298,6 @@ static void run_query(THD *thd, char *buf, char *end,
thd_ndb->m_error_code,
(int) thd->is_error(), thd->is_slave_error);
}
/*
After executing statement we should unlock and close tables open
by it as well as release meta-data locks obtained by it.
*/
close_thread_tables(thd);
/*
XXX: this code is broken. mysql_parse()/mysql_reset_thd_for_next_command()
can not be called from within a statement, and
@ -2422,7 +2415,11 @@ int ndb_add_ndb_binlog_index(THD *thd, void *_row)
}
add_ndb_binlog_index_err:
thd->stmt_da->can_overwrite_status= TRUE;
thd->is_error() ? trans_rollback_stmt(thd) : trans_commit_stmt(thd);
thd->stmt_da->can_overwrite_status= FALSE;
close_thread_tables(thd);
thd->mdl_context.release_transactional_locks();
ndb_binlog_index= 0;
thd->variables.option_bits= saved_options;
return error;
@ -3969,7 +3966,9 @@ restart:
{
if (ndb_binlog_index->s->needs_reopen())
{
trans_commit_stmt(thd);
close_thread_tables(thd);
thd->mdl_context.release_transactional_locks();
ndb_binlog_index= 0;
}
}
@ -4280,7 +4279,9 @@ restart:
if (do_ndbcluster_binlog_close_connection == BCCC_restart)
{
ndb_binlog_tables_inited= FALSE;
trans_commit_stmt(thd);
close_thread_tables(thd);
thd->mdl_context.release_transactional_locks();
ndb_binlog_index= 0;
goto restart;
}
@ -4288,7 +4289,11 @@ err:
sql_print_information("Stopping Cluster Binlog");
DBUG_PRINT("info",("Shutting down cluster binlog thread"));
thd->proc_info= "Shutting down";
thd->stmt_da->can_overwrite_status= TRUE;
thd->is_error() ? trans_rollback_stmt(thd) : trans_commit_stmt(thd);
thd->stmt_da->can_overwrite_status= FALSE;
close_thread_tables(thd);
thd->mdl_context.release_transactional_locks();
mysql_mutex_lock(&injector_mutex);
/* don't mess with the injector_ndb anymore from other threads */
injector_thd= 0;