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MDEV-18154 Deadlock and assertion upon no-op ALTER under LOCK TABLES

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1. Revert incorrect treatment of m_needs_reopen;
2. Close single instance of TABLE instead of all instances since
   reopened only those that are marked for reopen.
This commit is contained in:
Aleksey Midenkov
2019-08-15 22:32:59 +03:00
parent 395e1dcd17
commit 1639873671
2 changed files with 10 additions and 6 deletions
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13
sql/sql_base.cc
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@ -2488,9 +2488,16 @@ Locked_tables_list::reopen_tables(THD *thd, bool need_reopen)
{
if (!table_list->table || !table_list->table->needs_reopen())
continue;
/* no need to remove the table from the TDC here, thus (TABLE*)1 */
close_all_tables_for_name(thd, table_list->table->s,
HA_EXTRA_NOT_USED, (TABLE*)1);
for (TABLE **prev= &thd->open_tables; *prev; prev= &(*prev)->next)
{
if (*prev == table_list->table)
{
thd->locked_tables_list.unlink_from_list(thd, table_list, false);
mysql_lock_remove(thd, thd->lock, *prev);
close_thread_table(thd, prev);
break;
}
}
DBUG_ASSERT(table_list->table == NULL);
}
else