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Bug#27499 DROP TABLE race with SHOW TABLE STATUS

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They can drop table after table names list creation and before table opening.
We open non existing table and get ER_NO_SUCH_TABLE error.
In this case we do not store the record into I_S table and clear error.


sql/sql_show.cc:
  Hide error for not existing table
This commit is contained in:
unknown 2007-04-19 16:49:21 +05:00
commit 09db497642
1 changed files with 25 additions and 11 deletions
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34
sql/sql_show.cc
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@ -2315,17 +2315,31 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
MYSQL_LOCK_IGNORE_FLUSH);
lex->sql_command= save_sql_command;
/*
We should use show_table_list->alias instead of
show_table_list->table_name because table_name
could be changed during opening of I_S tables. It's safe
to use alias because alias contains original table name
in this case.
They can drop table after table names list creation and
before table opening. We open non existing table and
get ER_NO_SUCH_TABLE error. In this case we do not store
the record into I_S table and clear error.
*/
res= schema_table->process_table(thd, show_table_list, table,
res, orig_base_name,
show_table_list->alias);
close_tables_for_reopen(thd, &show_table_list);
DBUG_ASSERT(!lex->query_tables_own_last);
if (thd->net.last_errno == ER_NO_SUCH_TABLE)
{
res= 0;
thd->clear_error();
}
else
{
/*
We should use show_table_list->alias instead of
show_table_list->table_name because table_name
could be changed during opening of I_S tables. It's safe
to use alias because alias contains original table name
in this case.
*/
res= schema_table->process_table(thd, show_table_list, table,
res, orig_base_name,
show_table_list->alias);
close_tables_for_reopen(thd, &show_table_list);
DBUG_ASSERT(!lex->query_tables_own_last);
}
if (res)
goto err;
}