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mariadb/mysql-test/suite/binlog/r/binlog_base64_flag.result

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BUG#32407: Impossible to do point-in-time recovery from older binlog Problem: it is unsafe to read base64-printed events without first reading the Format_description_log_event (FD). Currently, mysqlbinlog cannot print the FD. As a side effect, another bug has also been fixed: When mysqlbinlog --start-position=X was specified, no ROLLBACK was printed. I changed this, so that ROLLBACK is always printed. This patch does several things: - Format_description_log_event (FD) now print themselves in base64 format. - mysqlbinlog is now able to print FD events. It has three modes: --base64-output=auto Print row events in base64 output, and print FD event. The FD event is printed even if it is outside the range specified with --start-position, because it would not be safe to read row events otherwise. This is the default. --base64-output=always Like --base64-output=auto, but also print base64 output for query events. This is like the old --base64-output flag, which is also a shorthand for --base64-output=always --base64-output=never Never print base64 output, generate error if row events occur in binlog. This is useful to suppress the FD event in binlogs known not to contain row events (e.g., because BINLOG statement is unsafe, requires root privileges, is not SQL, etc) - the BINLOG statement now handles FD events correctly, by setting the thread's rli's relay log's description_event_for_exec to the loaded event. In fact, executing a BINLOG statement is almost the same as reading an event from a relay log. Before my patch, the code for this was separated (exec_relay_log_event in slave.cc executes events from the relay log, mysql_client_binlog_statement in sql_binlog.cc executes BINLOG statements). I needed to augment mysql_client_binlog_statement to do parts of what exec_relay_log_event does. Hence, I did a small refactoring and moved parts of exec_relay_log_event to a new function, which I named apply_event_and_update_pos. apply_event_and_update_pos is called both from exec_relay_log_event and from mysql_client_binlog_statement. - When a non-FD event is executed in a BINLOG statement, without previously executing a FD event in a BINLOG statement, it generates an error, because that's unsafe. I took a new error code for that: ER_NO_FORMAT_DESCRIPTION_EVENT_BEFORE_BINLOG_STATEMENTS. In order to get a decent error message containing the name of the event, I added the class method char* Log_event::get_type_str(Log_event_type type), which returns a string name for the given Log_event_type. This is just like the existing char* Log_event::get_type_str(), except it is a class method that takes the log event type as parameter. I also added PRE_GA_*_ROWS_LOG_EVENT to Log_event::get_type_str(), so that names of old rows event are properly printed. - When reading an event, I added a check that the event type is known by the current Format_description_log_event. Without this, it may crash on bad input (and I was struck by this several times). - I patched the following test cases, which all contain BINLOG statements for row events which must be preceded by BINLOG statements for FD events: - rpl_bug31076 While I was here, I fixed some small things in log_event.cc: - replaced hard-coded 4 by EVENT_TYPE_OFFSET in 3 places - replaced return by DBUG_VOID_RETURN in one place - The name of the logfile can be '-' to indicate stdin. Before my patch, the code just checked if the first character is '-'; now it does a full strcmp(). Probably, all arguments that begin with a - are already handled somewhere else as flags, but I still think it is better that the code reflects what it is supposed to do, with as little dependencies as possible on other parts of the code. If we one day implement that all command line arguments after -- are files (as most unix tools do), then we need this. I also fixed the following in slave.cc: - next_event() was declared twice, and queue_event was not static but should be static (not used outside the file).
2007-12-14 19:02:02 +01:00
==== Test BUG#32407 ====
select * from t1;
a
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==== Test BINLOG statement w/o FD event ====
BINLOG '
SVtYRxMBAAAAKQAAADQBAAAAABAAAAAAAAAABHRlc3QAAnQxAAEDAAE=
SVtYRxcBAAAAIgAAAFYBAAAQABAAAAAAAAEAAf/+AgAAAA==
';
ERROR HY000: The BINLOG statement of type `Table_map` was not preceded by a format description BINLOG statement.
select * from t1;
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==== Test BINLOG statement with FD event ====
BINLOG '
ODdYRw8BAAAAZgAAAGoAAAABAAQANS4xLjIzLXJjLWRlYnVnLWxvZwAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAA4N1hHEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC
';
BINLOG '
TFtYRxMBAAAAKQAAAH8BAAAAABAAAAAAAAAABHRlc3QAAnQxAAEDAAE=
TFtYRxcBAAAAIgAAAKEBAAAQABAAAAAAAAEAAf/+AwAAAA==
';
select * from t1;
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==== Test --base64-output=never on a binlog with row events ====
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#ROLLBACK/*!*/;
# at 102
#use test/*!*/;
SET TIMESTAMP=1196959712/*!*/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1/*!*/;
SET @@session.sql_mode=0/*!*/;
/*!\C latin1 *//*!*/;
SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
create table t1 (a int) engine= myisam/*!*/;
# at 203
==== Test non-matching FD event and Row event ====
BINLOG '
4CdYRw8BAAAAYgAAAGYAAAAAAAQANS4xLjE1LW5kYi02LjEuMjQtZGVidWctbG9nAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAADgJ1hHEzgNAAgAEgAEBAQEEgAATwAEGggICAg=
';
BINLOG '
Dl1YRxMBAAAAKQAAADQBAAAAABAAAAAAAAAABHRlc3QAAnQxAAEDAAE=
Dl1YRxcBAAAAIgAAAFYBAAAQABAAAAAAAAEAAf/+BQAAAA==
';
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use
select * from t1;
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drop table t1;
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