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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.
111 lines
1.4 KiB
Plaintext
111 lines
1.4 KiB
Plaintext
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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flush logs;
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drop table t1;
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drop table t2;
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select * from t1;
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a
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1
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4
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5
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select * from t2;
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word
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Aarhus
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Aaron
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Ababa
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aback
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abaft
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abandon
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abandoned
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abandoning
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abandonment
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abandons
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Aarhus
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Aaron
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Ababa
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aback
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abaft
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abandon
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abandoned
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abandoning
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abandonment
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abandons
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abase
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abased
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abasement
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abasements
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abases
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abash
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abashed
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abashes
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abashing
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abasing
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abate
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abated
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abatement
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abatements
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abater
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abates
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abating
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Abba
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abbe
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abbey
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abbeys
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abbot
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abbots
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Abbott
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abbreviate
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abbreviated
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abbreviates
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abbreviating
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abbreviation
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abbreviations
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Abby
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abdomen
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abdomens
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abdominal
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abduct
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abducted
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abduction
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abductions
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abductor
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abductors
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abducts
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Abe
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abed
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Abel
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Abelian
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Abelson
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Aberdeen
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Abernathy
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aberrant
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aberration
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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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count(*)
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35840
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flush logs;
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select count(*) from t2;
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count(*)
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35840
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drop table t1;
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drop table t2;
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