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connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
flush status;
show status like 'Table_lock%';
connection con1;
SET SQL_LOG_BIN=0;
drop table if exists t1;
create table t1(n int);
insert into t1 values(1);
connection con2;
lock tables t1 read;
unlock tables;
lock tables t1 read;
connection con1;
--send
update t1 set n = 3;
connection con2;
sleep 0.5;
unlock tables;
connection con1;
reap;
show status like 'Table_lock%';
drop table t1;
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