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47010ccffa
- Major rewrite of ddl_log.cc and ddl_log.h
- ddl_log.cc described in the beginning how the recovery works.
- ddl_log.log has unique signature and is dynamic. It's easy to
add more information to the header and other ddl blocks while still
being able to execute old ddl entries.
- IO_SIZE for ddl blocks is now dynamic. Can be changed without affecting
recovery of old logs.
- Code is more modular and is now usable outside of partition handling.
- Renamed log file to dll_recovery.log and added option --log-ddl-recovery
to allow one to specify the path & filename.
- Added ddl_log_entry_phase[], number of phases for each DDL action,
which allowed me to greatly simply set_global_from_ddl_log_entry()
- Changed how strings are stored in log entries, which allows us to
store much more information in a log entry.
- ddl log is now always created at start and deleted on normal shutdown.
This simplices things notable.
- Added probes debug_crash_here() and debug_simulate_error() to simply
crash testing and allow crash after a given number of times a probe
is executed. See comments in debug_sync.cc and rename_table.test for
how this can be used.
- Reverting failed table and view renames is done trough the ddl log.
This ensures that the ddl log is tested also outside of recovery.
- Added helper function 'handler::needs_lower_case_filenames()'
- Extend binary log with Q_XID events. ddl log handling is using this
to check if a ddl log entry was logged to the binary log (if yes,
it will be deleted from the log during ddl_log_close_binlogged_events()
- If a DDL entry fails 3 time, disable it. This is to ensure that if
we have a crash in ddl recovery code the server will not get stuck
in a forever crash-restart-crash loop.
mysqltest.cc changes:
- --die will now replace $variables with their values
- $error will contain the error of the last failed statement
storage engine changes:
- maria_rename() was changed to be more robust against crashes during
rename.
147 lines
7 KiB
Text
147 lines
7 KiB
Text
RESET MASTER;
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"engine: myisam crash point: ddl_log_rename_before_binlog position: 1"
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"engine: myisam crash point: ddl_log_rename_after_binlog position: 1"
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"engine: aria crash point: ddl_log_rename_before_binlog position: 1"
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"engine: aria crash point: ddl_log_rename_after_binlog position: 1"
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; insert into t1 values(null)
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; insert into t2 values(null)
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; insert into t3 values(null)
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; insert into t4 values(null)
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; delete from t1 where a > 100
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; delete from t2 where b > 100
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; delete from t3 where c > 100
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # BEGIN GTID #-#-#
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master-bin.000002 # Query # # use `test`; delete from t4 where d > 100
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master-bin.000002 # Query # # COMMIT
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master-bin.000002 # Gtid # # GTID #-#-#
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master-bin.000002 # Query # # use `test`; flush tables
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master-bin.000002 # Gtid # # GTID #-#-#
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master-bin.000002 # Query # # use `test`; rename table t1 to t5, t2 to t1, t5 to t2, t4 to t5, t3 to t4
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t1 values(null)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t2 values(null)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t5 values(null)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t4 values(null)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; DROP TABLE `t1`,`t2`,`t4`,`t5` /* generated by server */
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; create table t1 (a int not null) transactional=1
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; create table t2 (b int not null) transactional=1
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; create table t3 (c int not null) transactional=1
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; create table t4 (d int not null) transactional=1
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t1 values(1)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t2 values(2)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t3 values(3)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Query # # use `test`; insert into t4 values(4)
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master-bin.000003 # Query # # COMMIT
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` trigger t1_trg before insert on t1 for each row
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begin
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if isnull(new.a) then
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set new.a:= 1000;
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end if;
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end
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` trigger t2_trg before insert on t2 for each row
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begin
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if isnull(new.b) then
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set new.b:= 2000;
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end if;
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end
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` trigger t3_trg before insert on t3 for each row
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begin
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if isnull(new.c) then
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set new.c:= 4000;
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end if;
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end
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` trigger t4_trg before insert on t4 for each row
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begin
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if isnull(new.d) then
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set new.d:= 8000;
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end if;
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end
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master-bin.000003 # Gtid # # GTID #-#-#
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master-bin.000003 # Query # # use `test`; flush tables
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; insert into t1 values(null)
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; insert into t2 values(null)
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; insert into t3 values(null)
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; insert into t4 values(null)
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; delete from t1 where a > 100
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; delete from t2 where b > 100
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; delete from t3 where c > 100
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Query # # use `test`; delete from t4 where d > 100
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master-bin.000004 # Query # # COMMIT
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master-bin.000004 # Gtid # # GTID #-#-#
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master-bin.000004 # Query # # use `test`; flush tables
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master-bin.000004 # Gtid # # GTID #-#-#
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master-bin.000004 # Query # # use `test`; rename table t1 to t5, t2 to t1, t5 to t2, t4 to t5, t3 to t4
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Query # # use `test`; insert into t1 values(null)
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master-bin.000005 # Query # # COMMIT
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Query # # use `test`; insert into t2 values(null)
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master-bin.000005 # Query # # COMMIT
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Query # # use `test`; insert into t5 values(null)
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master-bin.000005 # Query # # COMMIT
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Query # # use `test`; insert into t4 values(null)
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master-bin.000005 # Query # # COMMIT
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master-bin.000005 # Gtid # # GTID #-#-#
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master-bin.000005 # Query # # use `test`; DROP TABLE `t1`,`t2`,`t4`,`t5` /* generated by server */
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