mariadb/mysql-test/t/log_tables.test

#
# Basic log tables test
#

# check that CSV engine was compiled in
--source include/have_csv.inc

use mysql;

#
# Check that log tables work and we can do basic selects. This also
# tests truncate, which works in a special mode with the log tables
#

truncate table general_log;
--replace_column 1 TIMESTAMP
select * from general_log;
truncate table slow_log;
--replace_column 1 TIMESTAMP
select * from slow_log;

#
# We want to check that a record newly written to a log table shows up for
# the query: since log tables use concurrent insert machinery and log tables
# are always locked by artificial THD, this feature requires additional
# check in ha_tina::write_row. This simple test should prove that the
# log table flag in the table handler is triggered and working.
#

truncate table general_log;
--replace_column 1 TIMESTAMP
select * from general_log where argument like '%general_log%';


#
# Check some basic queries interfering with the log tables.
# In our test we'll use a tbale with verbose comments to the short
# command type names, used in the tables
#

create table join_test (verbose_comment varchar (80), command_type varchar(64));

insert into join_test values ("User performed a usual SQL query", "Query");
insert into join_test values ("New DB connection was registered", "Connect");
insert into join_test values ("Get the table info", "Field List");

select verbose_comment, user_host, argument
  from  mysql.general_log join join_test
    on (mysql.general_log.command_type = join_test.command_type);

drop table join_test;

#
# check that flush of the log table work fine
#

flush logs;

#
# check locking of the log tables
#

--error 1532
lock tables mysql.general_log WRITE;

--error 1532
lock tables mysql.slow_log WRITE;

#
# This attemts to get TL_READ_NO_INSERT lock, which is incompatible with
# TL_WRITE_CONCURRENT_INSERT. This should fail. We issue this error as log
# tables are always opened and locked by the logger.
#

--error 1533
lock tables mysql.general_log READ;

--error 1533
lock tables mysql.slow_log READ;

#
# This call should result in TL_READ lock on the log table. This is ok and
# should pass.
#

lock tables mysql.slow_log READ LOCAL, mysql.general_log READ LOCAL;

unlock tables;

#
# check that FLUSH LOGS waits for all readers of the log table to vanish
#

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

connection con1;

lock tables mysql.general_log READ LOCAL;

connection con2;

# this should wait for log tables to unlock
send flush logs;

connection con1;

unlock tables;

# this connection should be alive by the time
connection con2;

reap;

select "Mark that we woke up from flush logs in the test"
       as "test passed";

#
# perform the same check for TRUNCATE: it should also wait for readers
# to disappear
#

connection con1;

lock tables mysql.general_log READ LOCAL;

connection con2;

# this should wait for log tables to unlock
send truncate mysql.general_log;

connection con1;

unlock tables;

# this connection should be alive by the time
connection con2;

reap;

select "Mark that we woke up from TRUNCATE in the test"
       as "test passed";

disconnect con2;
disconnect con1;