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set global aria_log_file_size=4294959104;
drop database if exists mysqltest;
create database mysqltest;
use mysqltest;
* TEST of recovery with blobs
* shut down mysqld, removed logs, restarted it
create table t1 (a int, b longtext) engine=aria table_checksum=1;
* copied t1 for feeding_recovery
insert into t1 values (1,"123456789012345678901234567890"),(2,"09876543210987654321");
flush table t1;
* copied t1 for comparison
lock table t1 write;
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
update t1 set b=CONCAT(b,b);
select a,length(b) from t1;
a length(b)
1 31457280
2 20971520
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
update t1 set b=mid(b,1,length(b)/2);
select a,length(b) from t1;
a length(b)
1 8
2 5
SET SESSION debug_dbug="+d,maria_flush_whole_log,maria_crash";
* crashing mysqld intentionally
set global aria_checkpoint_interval=1;
ERROR HY000: Lost connection to MySQL server during query
* copied t1 back for feeding_recovery
* recovery happens
check table t1 extended;
Table Op Msg_type Msg_text
mysqltest.t1 check status OK
* testing that checksum after recovery is as expected
Checksum-check
ok
use mysqltest;
drop table t1;
drop database mysqltest_for_feeding_recovery;
drop database mysqltest_for_comparison;
drop database mysqltest;
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