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This is a complete rewrite of DROP TABLE, also as part of other DDL, such as ALTER TABLE, CREATE TABLE...SELECT, TRUNCATE TABLE. The background DROP TABLE queue hack is removed. If a transaction needs to drop and create a table by the same name (like TRUNCATE TABLE does), it must first rename the table to an internal #sql-ib name. No committed version of the data dictionary will include any #sql-ib tables, because whenever a transaction renames a table to a #sql-ib name, it will also drop that table. Either the rename will be rolled back, or the drop will be committed. Data files will be unlinked after the transaction has been committed and a FILE_RENAME record has been durably written. The file will actually be deleted when the detached file handle returned by fil_delete_tablespace() will be closed, after the latches have been released. It is possible that a purge of the delete of the SYS_INDEXES record for the clustered index will execute fil_delete_tablespace() concurrently with the DDL transaction. In that case, the thread that arrives later will wait for the other thread to finish. HTON_TRUNCATE_REQUIRES_EXCLUSIVE_USE: A new handler flag. ha_innobase::truncate() now requires that all other references to the table be released in advance. This was implemented by Monty. ha_innobase::delete_table(): If CREATE TABLE..SELECT is detected, we will "hijack" the current transaction, drop the table in the current transaction and commit the current transaction. This essentially fixes MDEV-21602. There is a FIXME comment about making the check less failure-prone. ha_innobase::truncate(), ha_innobase::delete_table(): Implement a fast path for temporary tables. We will no longer allow temporary tables to use the adaptive hash index. dict_table_t::mdl_name: The original table name for the purpose of acquiring MDL in purge, to prevent a race condition between a DDL transaction that is dropping a table, and purge processing undo log records of DML that had executed before the DDL operation. For #sql-backup- tables during ALTER TABLE...ALGORITHM=COPY, the dict_table_t::mdl_name will differ from dict_table_t::name. dict_table_t::parse_name(): Use mdl_name instead of name. dict_table_rename_in_cache(): Update mdl_name. For the internal FTS_ tables of FULLTEXT INDEX, purge would acquire MDL on the FTS_ table name, but not on the main table, and therefore it would be able to run concurrently with a DDL transaction that is dropping the table. Previously, the DROP TABLE queue hack prevented a race between purge and DDL. For now, we introduce purge_sys.stop_FTS() to prevent purge from opening any table, while a DDL transaction that may drop FTS_ tables is in progress. The function fts_lock_table(), which will be invoked before the dictionary is locked, will wait for purge to release any table handles. trx_t::drop_table_statistics(): Drop statistics for the table. This replaces dict_stats_drop_index(). We will drop or rename persistent statistics atomically as part of DDL transactions. On lock conflict for dropping statistics, we will fail instantly with DB_LOCK_WAIT_TIMEOUT, because we will be holding the exclusive data dictionary latch. trx_t::commit_cleanup(): Separated from trx_t::commit_in_memory(). Relax an assertion around fts_commit() and allow DB_LOCK_WAIT_TIMEOUT in addition to DB_DUPLICATE_KEY. The call to fts_commit() is entirely misplaced here and may obviously break the consistency of transactions that affect FULLTEXT INDEX. It needs to be fixed separately. dict_table_t::n_foreign_key_checks_running: Remove (MDEV-21175). The counter was a work-around for missing meta-data locking (MDL) on the SQL layer, and not really needed in MariaDB. ER_TABLE_IN_FK_CHECK: Replaced with ER_UNUSED_28. HA_ERR_TABLE_IN_FK_CHECK: Remove. row_ins_check_foreign_constraints(): Do not acquire dict_sys.latch either. The SQL-layer MDL will protect us. This was reviewed by Thirunarayanan Balathandayuthapani and tested by Matthias Leich.
155 lines
4.7 KiB
Text
155 lines
4.7 KiB
Text
# ==== Purpose ====
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#
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# This test is executed twice for each test case. Before every
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# testcase it is run with mysqltest in record mode and will thus
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# produce an output file that can be compared to output from after the
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# tescase. In that way, it is possible to check that a testcase does
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# not have any unwanted side affects.
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--disable_query_log
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# We want to ensure all slave configuration is restored. But SHOW
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# SLAVE STATUS returns nothing for servers not configured as slaves,
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# and (after BUG#28796 was fixed) there is no way to de-configure a
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# slave. Hence, it's impossible to clean up the replication state at
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# the end. But we want to check that the slave is stopped, there is
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# no error, and a few other invariants. So we issue SHOW SLAVE
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# STATUS, and if it returns no rows we fake the result.
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--let $tmp= query_get_value(SHOW SLAVE STATUS, Slave_IO_Running, 1)
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--let $tmp= `SELECT '$tmp' = 'No such row'`
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if ($tmp)
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{
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# Note: after WL#5177, fields 13-18 shall not be filtered-out.
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--echo Slave_IO_State
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--echo Master_Host 127.0.0.1
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--echo Master_User root
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--echo Master_Port #
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--echo Connect_Retry #
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--echo Master_Log_File #
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--echo Read_Master_Log_Pos #
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--echo Relay_Log_File #
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--echo Relay_Log_Pos #
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--echo Relay_Master_Log_File #
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--echo Slave_IO_Running No
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--echo Slave_SQL_Running No
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--echo Replicate_Do_DB #
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--echo Replicate_Ignore_DB #
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--echo Replicate_Do_Table #
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--echo Replicate_Ignore_Table #
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--echo Replicate_Wild_Do_Table #
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--echo Replicate_Wild_Ignore_Table #
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--echo Last_Errno 0
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--echo Last_Error
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--echo Skip_Counter 0
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--echo Exec_Master_Log_Pos #
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--echo Relay_Log_Space #
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--echo Until_Condition #
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--echo Until_Log_File #
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--echo Until_Log_Pos #
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--echo Master_SSL_Allowed No
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--echo Master_SSL_CA_File
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--echo Master_SSL_CA_Path
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--echo Master_SSL_Cert
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--echo Master_SSL_Cipher
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--echo Master_SSL_Key
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--echo Seconds_Behind_Master NULL
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--echo Master_SSL_Verify_Server_Cert No
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--echo Last_IO_Errno 0
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--echo Last_IO_Error
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--echo Last_SQL_Errno 0
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--echo Last_SQL_Error
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--echo Replicate_Ignore_Server_Ids
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--echo Master_Server_Id #
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--echo Master_SSL_Crl #
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--echo Master_SSL_Crlpath #
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--echo Using_Gtid No
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--echo Gtid_IO_Pos #
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--echo Replicate_Do_Domain_Ids
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--echo Replicate_Ignore_Domain_Ids
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--echo Parallel_Mode optimistic
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--echo SQL_Delay 0
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--echo SQL_Remaining_Delay NULL
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--echo Slave_SQL_Running_State
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--echo Slave_DDL_Groups #
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--echo Slave_Non_Transactional_Groups #
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--echo Slave_Transactional_Groups #
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}
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if (!$tmp) {
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# Note: after WL#5177, fields 13-18 shall not be filtered-out.
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--replace_column 4 # 5 # 6 # 7 # 8 # 9 # 10 # 13 # 14 # 15 # 16 # 17 # 18 # 22 # 23 # 24 # 25 # 26 # 40 # 41 # 42 # 44 # 51 # 52 # 53 #
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query_vertical
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SHOW SLAVE STATUS;
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}
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#
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# Ensure that we don't get warnings from mysql.proc (used by check_mysqld)
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#
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--disable_query_log
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--disable_warnings
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--disable_result_log
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select count(*) from mysql.proc;
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--enable_result_log
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--enable_warnings
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--enable_query_log
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call mtr.check_testcase();
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let $datadir=`select @@datadir`;
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list_files $datadir mysql_upgrade_info;
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list_files $datadir/test #sql*;
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list_files $datadir/mysql #sql*;
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#
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# Check that SHOW ENGINE INNODB STATUS does not show any active transactions
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# We do this only if wsrep provider is loaded, to avoid disturbing any non-Galera MTR tests
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#
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if (`SELECT COUNT(*)=1 FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME = 'wsrep' AND PLUGIN_STATUS='ACTIVE'`) {
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if (`SELECT @@wsrep_on`) {
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if (`SELECT COUNT(*) FROM information_schema.innodb_trx WHERE trx_mysql_thread_id != 0`) {
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if ($before) {
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--echo Before test start.
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}
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if (!$before) {
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--echo After test end.
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}
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--echo There is one or more active InnoDB transaction(s) when there should be none. Dumping some diagnostics.
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--let $status_locks = `SELECT @@innodb_status_output_locks`
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--let $status_output = `SELECT @@innodb_status_output`
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--enable_query_log
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SET GLOBAL innodb_status_output_locks=ON;
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SHOW ENGINE INNODB STATUS;
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--disable_query_log
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--eval SET GLOBAL innodb_status_output_locks=$status_locks;
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--eval SET GLOBAL innodb_status_output=$status_output;
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--enable_query_log
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--vertical_results
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if ($before) {
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--replace_regex /$/ /
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}
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SELECT * FROM information_schema.processlist;
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if ($before) {
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--replace_regex /$/ /
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}
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SELECT * FROM information_schema.innodb_trx;
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if ($before) {
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--replace_regex /$/ /
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}
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SELECT * FROM information_schema.innodb_locks;
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if ($before) {
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--replace_regex /$/ /
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}
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SELECT * FROM information_schema.innodb_lock_waits;
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--horizontal_results
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--disable_query_log
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}
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}
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}
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--enable_query_log
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