diff options
Diffstat (limited to 'sql/sql_parse.cc')
| -rw-r--r-- | sql/sql_parse.cc | 65 |
1 files changed, 63 insertions, 2 deletions
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index f4038649745..1c36bd7bcdf 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -763,6 +763,8 @@ void init_update_queries(void) There are other statements that deal with temporary tables and open them, but which are not listed here. The thing is that the order of pre-opening temporary tables for those statements is somewhat custom. + + Note that SQLCOM_RENAME_TABLE should not be in this list! */ sql_command_flags[SQLCOM_CREATE_TABLE]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_DROP_TABLE]|= CF_PREOPEN_TMP_TABLES; @@ -776,7 +778,6 @@ void init_update_queries(void) sql_command_flags[SQLCOM_INSERT_SELECT]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_DELETE]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_DELETE_MULTI]|= CF_PREOPEN_TMP_TABLES; - sql_command_flags[SQLCOM_RENAME_TABLE]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_REPLACE_SELECT]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_SELECT]|= CF_PREOPEN_TMP_TABLES; sql_command_flags[SQLCOM_SET_OPTION]|= CF_PREOPEN_TMP_TABLES; @@ -6525,6 +6526,60 @@ static bool execute_show_status(THD *thd, TABLE_LIST *all_tables) } +/* + Find out if a table is a temporary table + + A table is a temporary table if it's a temporary table or + there has been before a temporary table that has been renamed + to the current name. + + Some examples: + A->B B is a temporary table if and only if A is a temp. + A->B, B->C Second B is temp if A is temp + A->B, A->C Second A can't be temp as if A was temp then B is temp + and Second A can only be a normal table. C is also not temp +*/ + +static TABLE *find_temporary_table_for_rename(THD *thd, + TABLE_LIST *first_table, + TABLE_LIST *cur_table) +{ + TABLE_LIST *table; + TABLE *res= 0; + bool found= 0; + DBUG_ENTER("find_temporary_table_for_rename"); + + /* Find last instance when cur_table is in TO part */ + for (table= first_table; + table != cur_table; + table= table->next_local->next_local) + { + TABLE_LIST *next= table->next_local; + + if (!strcmp(table->get_db_name(), cur_table->get_db_name()) && + !strcmp(table->get_table_name(), cur_table->get_table_name())) + { + /* Table was moved away, can't be same as 'table' */ + found= 1; + res= 0; // Table can't be a temporary table + } + if (!strcmp(next->get_db_name(), cur_table->get_db_name()) && + !strcmp(next->get_table_name(), cur_table->get_table_name())) + { + /* + Table has matching name with new name of this table. cur_table should + have same temporary type as this table. + */ + found= 1; + res= table->table; + } + } + if (!found) + res= thd->find_temporary_table(table, THD::TMP_TABLE_ANY); + DBUG_RETURN(res); +} + + static bool check_rename_table(THD *thd, TABLE_LIST *first_table, TABLE_LIST *all_tables) { @@ -6541,13 +6596,19 @@ static bool check_rename_table(THD *thd, TABLE_LIST *first_table, &table->next_local->grant.m_internal, 0, 0)) return 1; + + /* check if these are refering to temporary tables */ + table->table= find_temporary_table_for_rename(thd, first_table, table); + table->next_local->table= table->table; + TABLE_LIST old_list, new_list; /* we do not need initialize old_list and new_list because we will - come table[0] and table->next[0] there + copy table[0] and table->next[0] there */ old_list= table[0]; new_list= table->next_local[0]; + if (check_grant(thd, ALTER_ACL | DROP_ACL, &old_list, FALSE, 1, FALSE) || (!test_all_bits(table->next_local->grant.privilege, INSERT_ACL | CREATE_ACL) && |