drop table if exists t1;
create temporary table t1(n int not null primary key);
drop table if exists t2;
create table t2(n int);
insert into t2 values(3);
select * from t1;
n
3
flush tables with read lock;
drop table t2;
Table 't2' was locked with a READ lock and can't be updated
 drop table t2;
unlock tables;
drop database if exists foo;
create database foo;
create table foo.t1(n int);
insert into foo.t1 values (23);
flush tables with read lock;
 drop database foo;
select * from foo.t1;
n
23
unlock tables;
create table t1 (n int);
flush tables with read lock;
insert into t1 values (345);
select * from t1;
n
345
drop table t1;