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ba2452f092
mysqlbinlog prints all row-based events of a single statement as a single "BINLOG" statement containing the concatenation of those events. Big (i.e. >64k) concatenations of row-based events (e.g. Write_rows_log_event) caused mysqlbinlog's IO_CACHE to overflow to a temporary file but the IO_CACHE had not been inited with open_cached_file(), so it tried to create a temporary file in an uninitialized directory (thus failing to create, then to write; some OS errors were printed, and it finally segfaulted). After fixing this, it appeared that mysqlbinlog was printing only a piece of big concatenations of row-based events (it printed at most the size of the IO_CACHE's buffer i.e. 64k); that caused data loss at restore. We fix and test that. Last, mysqlbinlog's printouts looked a bit strange with the informative header (#-prefixed) of groupped Rows_log_event all on one line, so we insert \n. After that, a small bug in the --hexdump code appeared (only if the string to hex-print had its length a multiple of 16), we fix it.
68 lines
1.6 KiB
Plaintext
68 lines
1.6 KiB
Plaintext
-- source include/have_binlog_format_row.inc
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#
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# Write different events to binlog
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#
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create table t1 (a int);
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insert into t1 values (1);
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insert into t1 values (2);
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insert into t1 values (3);
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update t1 set a=a+2 where a=2;
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update t1 set a=a+2 where a=3;
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create table t2 (word varchar(20));
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load data infile '../std_data_ln/words.dat' into table t2;
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#
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# Save binlog
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#
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flush logs;
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--exec $MYSQL_BINLOG --hexdump $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
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#
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# Clear database and restore from binlog
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#
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drop table t1;
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drop table t2;
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--exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
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#
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# Verify that all binlog events have been executed
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#
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select * from t1;
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select * from t2;
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#
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# Verify that events larger than the default IO_CACHE buffer
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# are handled correctly (BUG#25628).
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#
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flush logs;
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drop table t2;
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create table t2 (word varchar(20));
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load data infile '../std_data_ln/words.dat' into table t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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insert into t2 select * from t2;
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select count(*) from t2;
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flush logs;
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--exec $MYSQL_BINLOG --hexdump $MYSQLTEST_VARDIR/log/master-bin.000003 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
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--exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
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#
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# Verify that all binlog events have been executed
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#
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select count(*) from t2;
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#
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# Test cleanup
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#
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--exec rm $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
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drop table t1;
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drop table t2;
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