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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.
52 lines
1.3 KiB
Text
52 lines
1.3 KiB
Text
create database test2;
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#
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# Testing rename error in different places
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#
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create table t1 (a int);
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create table T2 (b int);
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create table t3 (c int);
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create table T4 (d int);
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insert into t1 values(1);
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insert into T2 values(2);
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insert into t3 values(3);
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insert into T4 values(4);
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create temporary table tmp1 (a int);
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create temporary table tmp2 (b int);
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create temporary table tmp3 (c int);
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create temporary table tmp4 (d int);
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insert into tmp1 values(11);
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insert into tmp2 values(22);
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insert into tmp3 values(33);
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insert into tmp4 values(44);
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rename table t3 to T4, t1 to t5, T2 to t1, t5 to T2;
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ERROR 42S01: Table 'T4' already exists
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rename table t1 to t5, t3 to T4, T2 to t1, t5 to T2;
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ERROR 42S01: Table 'T4' already exists
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rename table t1 to t5, T2 to t1, t3 to T4, t5 to T2;
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ERROR 42S01: Table 'T4' already exists
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rename table t1 to t5, T2 to t1, t5 to T2, t3 to T4;
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ERROR 42S01: Table 'T4' already exists
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# Try failed rename using two databases
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rename table test.t1 to test2.t5, test.T2 to test.t1, t5 to test.T2;
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ERROR 42S02: Table 'test.t5' doesn't exist
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select t1.a+T2.b+t3.c+T4.d from t1,T2,t3,T4;
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t1.a+T2.b+t3.c+T4.d
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10
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select * from t5;
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ERROR 42S02: Table 'test.t5' doesn't exist
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T2.MYD
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T2.MYI
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T2.frm
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T4.MYD
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T4.MYI
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T4.frm
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db.opt
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t1.MYD
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t1.MYI
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t1.frm
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t3.MYD
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t3.MYI
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t3.frm
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# Cleanup
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drop table t1,T2,t3,T4;
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drop database test2;
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