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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.
79 lines
3.0 KiB
Plaintext
79 lines
3.0 KiB
Plaintext
--source include/have_log_bin.inc
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--source include/have_binlog_format_row.inc
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#
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# MWL36: Add a mysqlbinlog option to change the used database
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# (Adding --rewrite-db option)
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#
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--disable_warnings
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DROP DATABASE IF EXISTS test1;
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DROP DATABASE IF EXISTS test2;
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DROP DATABASE IF EXISTS test3;
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--enable_warnings
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# For SBR --rewrite-db affects only default database and doesn't affect
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# a query (specifically CREATE DATABASE) itself. Hence (for testing
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# purpose) we start binary logging after all databases have been created.
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CREATE DATABASE test1;
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CREATE DATABASE test2;
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CREATE DATABASE test3;
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# Fix timestamp to avoid varying results.
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SET timestamp=1000000000;
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# Delete all existing binary logs.
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RESET MASTER;
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# Whe'll call mysqlbinlog with two rewrite rules:
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# --rewrite-db="test1->new_test1"
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# --rewrite-db="test3->new_test3"
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USE test1;
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CREATE TABLE t1 (a INT, b INT);
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INSERT INTO t1 VALUES (1,1),(2,2);
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USE test2;
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CREATE TABLE t2 (a INT);
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INSERT INTO t2 VALUES (1),(2);
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DELETE FROM test1.t1 WHERE a=1;
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USE test3;
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CREATE TABLE t3 (a INT);
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INSERT INTO t3 VALUES (1),(2);
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INSERT INTO test1.t1 VALUES (3,3);
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USE test1;
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LOAD DATA INFILE '../../std_data/loaddata7.dat' INTO TABLE t1
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FIELDS TERMINATED BY ',' LINES TERMINATED BY '\r\n';
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DELETE FROM test3.t3 WHERE a=1;
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flush logs;
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--echo #
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--echo # mysqlbinlog output
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--echo # --base64-output = decode-rows
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--echo # --rewrite-db = test1->new_test1
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--echo # --rewrite-db = test3->new_test3
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--echo #
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let $MYSQLD_DATADIR= `select @@datadir`;
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--replace_regex /server id [0-9]*/server id #/ /server v [^ ]*/server v #.##.##/ /exec_time=[0-9]*/exec_time=#/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /CRC32 0x[0-9a-f]*/CRC32 XXX/ /collation_server=[0-9]+/collation_server=X/ /character_set_client=[0-9]+/character_set_client=X/ /collation_connection=[0-9]+/collation_connection=X/ /xid=\d*/xid=<xid>/
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--exec $MYSQL_BINLOG --base64-output=decode-rows --rewrite-db="test1->new_test1" --rewrite-db="test3->new_test3" -v -v $MYSQLD_DATADIR/master-bin.000001
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--echo #
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--echo # mysqlbinlog output
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--echo # --base64-output = decode-rows
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--echo # --rewrite-db = test1->new_test1
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--echo # --rewrite-db = test3->new_test3
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--echo # --read-from-remote-server
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--echo #
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--replace_regex /server id [0-9]*/server id #/ /server v [^ ]*/server v #.##.##/ /exec_time=[0-9]*/exec_time=#/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /CRC32 0x[0-9a-f]*/CRC32 XXX/ /collation_server=[0-9]+/collation_server=X/ /character_set_client=[0-9]+/character_set_client=X/ /collation_connection=[0-9]+/collation_connection=X/ /xid=\d*/xid=<xid>/
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--exec $MYSQL_BINLOG --base64-output=decode-rows --rewrite-db="test1->new_test1" --rewrite-db="test3->new_test3" -v -v --read-from-remote-server --user=root --host=localhost --port=$MASTER_MYPORT master-bin.000001
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DROP DATABASE test1;
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DROP DATABASE test2;
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DROP DATABASE test3;
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