polardbxengine/mysql-test/suite/ndb_binlog/t/ndb_binlog_purge_lock.inc

# Testing that purging rows in ndb_binlog_index doesn't block parallel inserts
--source include/have_ndb.inc
--source include/have_log_bin.inc

# Require that ndb_binlog_index is using Innodb
let $using_innodb =
  `select engine = 'InnoDB'
     from information_schema.tables
       where table_name = 'ndb_binlog_index'`;
# echo using_innodb: $using_innodb;
if (!$using_innodb)
{
  die The ndb_binlog_index table is not using Innodb;
}

connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connect (con3,localhost,root,,);
connect (con4,localhost,root,,);

connection default;

--echo First initialize the binlog
reset master;

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings

--echo Test that binlog purging doesn't use table lock on ndb_binlog_index

--echo Put some real stuff in the Binlog.
create table test.t1 (
  pk integer primary key auto_increment,
  a varchar(1000)
) engine=ndb;
insert into test.t1 values (NULL, repeat('BJC', 300));
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;
insert into test.t1 select NULL, a from test.t1;

--source include/wait_for_ndb_committed_to_binlog.inc

let $master_log_file = query_get_value("SHOW MASTER STATUS", "File", 1);
eval
  select trim(trailing "$master_log_file" from File)
    from mysql.ndb_binlog_index
    where epoch in (select max(epoch) from mysql.ndb_binlog_index)
  into @file_prefix;
eval select concat(@file_prefix, "$master_log_file") into @file1;

--echo Have at least 100 epoch rows
select count(*)/100 > 0 from mysql.ndb_binlog_index where File=@file1;

--echo Flush log to get onto the next file...
FLUSH LOGS;

let $master_log_file2 = query_get_value("SHOW MASTER STATUS", "File", 1);
eval select concat(@file_prefix, "$master_log_file2") into @file2;

create table test.files(file1 varchar(255), file2 varchar(255));
insert into test.files values(@file1, @file2);

disable_query_log;
connection con1;
select file1 from test.files into @file1;
select file2 from test.files into @file2;

connection con2;
select file1 from test.files into @file1;
select file2 from test.files into @file2;

connection con3;
select file1 from test.files into @file1;
select file2 from test.files into @file2;

connection con4;
select file1 from test.files into @file1;
select file2 from test.files into @file2;
enable_query_log;

connection con1;
# Create a temporary tables and select the "keys" for one row
# in mysql.ndb_binlog_index into that table. Then select
# the "keys" into MySQL Server variables for further usage
# in the "locking" query
--echo Pick one row from ndb_binlog_index
CREATE TEMPORARY TABLE my_ndb_binlog_index (
  epoch BIGINT UNSIGNED NOT NULL,
  orig_server_id INT UNSIGNED NOT NULL,
  orig_epoch BIGINT UNSIGNED NOT NULL
);
insert into my_ndb_binlog_index
  select epoch, orig_server_id, orig_epoch
    from mysql.ndb_binlog_index
      where File=@file1 limit 1;
select epoch from my_ndb_binlog_index into @epoch;
select orig_server_id from my_ndb_binlog_index into @orig_server_id;
select orig_epoch from my_ndb_binlog_index into @orig_epoch;

--echo Lock one row to block purge
start transaction;
select count(1) from mysql.ndb_binlog_index
  where epoch = @epoch and
        orig_server_id = @orig_server_id and
        orig_epoch = @orig_epoch and
        File=@file1 for update;

connection con2;
--echo Check that there are no rows in the next file
select count(*)=0 from mysql.ndb_binlog_index where File=@file2;
--echo Start the purge that will get stuck on one row
--send_eval PURGE BINARY LOGS TO '$master_log_file2'

connection con3;
--echo Wait 10 sec for purge to run into the row lock
sleep 10;
--echo Now we should still have some rows in the first file (since the purge is stuck)
select count(*)>0 from mysql.ndb_binlog_index where File=@file1;
--echo Insert some more rows
insert into test.t1 select NULL, a from test.t1;
--echo Wait for rows to be committed to binlog
--source include/wait_for_ndb_committed_to_binlog.inc
--echo Now we see rows in the next file (which means there is no table lock)
select count(*)>0 from mysql.ndb_binlog_index where File=@file2;

connection con1;
--echo Release the purge
commit;

connection con2;
--reap
--echo Purge done

connection con4;
--echo Now we should have no rows in the first file
select @result:=count(*)=0 from mysql.ndb_binlog_index where File=@file1;

# Debugging windows failures...
let $result=query_get_value(select @result as r, r, 1);

if (!$result)
{
  --echo Unexpected rows in first file, dumping context
  select * from mysql.ndb_binlog_index;
  select @file1;
  select @file2;
  --connection con1
  select * from my_ndb_binlog_index;
  --echo Master log file $master_log_file
  --echo Master log file2 $master_log_file2
  SHOW BINARY LOGS;
  --echo If Binary log entry exists following
  --echo should succeed, else fail
  --eval PURGE BINARY LOGS TO '$master_log_file2'
  select * from mysql.ndb_binlog_index;
}
# /Debugging windows failures...

--echo Now we still should see rows in the next file
select count(*)>0 from mysql.ndb_binlog_index where File=@file2;

connection default;
--echo cleanup
drop table test.t1, test.files;

--echo Done