flush_read_lock_kill.test

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

# Let's see if FLUSH TABLES WITH READ LOCK can be killed when waiting
# for running commits to finish (in the past it could not)
# This will not be a meaningful test on non-debug servers so will be
# skipped.
# If running mysql-test-run --debug, the --debug added by
# mysql-test-run to the mysqld command line will override the one of
# -master.opt. But this test is designed to still pass then (though it
# won't test anything interesting).

# This also won't work with the embedded server test
-- source include/not_embedded.inc

-- source include/have_debug.inc

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

--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (kill_id int);
insert into t1 values(connection_id());

# Thanks to the parameter we passed to --debug, this FLUSH will
# block on a debug build running with our --debug=make_global... It
# will block until killed. In other cases (non-debug build or other
# --debug) it will succeed immediately

connection con1;
send flush tables with read lock;

# kill con1
connection con2;
select ((@id := kill_id) - kill_id) from t1; 

--sleep 2 # leave time for FLUSH to block
kill connection @id;

connection con1;
# On debug builds it will be error 1053 (killed); on non-debug, or
# debug build running without our --debug=make_global..., will be
# error 0 (no error). The only important thing to test is that on
# debug builds with our --debug=make_global... we don't hang forever.
--error 0,1053,2013
reap;

connection con2;
drop table t1;