/usr/share/mysql/mysql-test/t/tablelock.test is in mariadb-test-5.5 5.5.36-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Test of lock tables
#
--disable_warnings
drop table if exists t1,t2;
--enable_warnings
create table t1 ( n int auto_increment primary key);
lock tables t1 write;
insert into t1 values(NULL);
unlock tables;
check table t1;
lock tables t1 write, t1 as t0 read;
insert into t1 values(NULL);
unlock tables;
check table t1;
lock tables t1 write, t1 as t0 read, t1 as t2 read;
insert into t1 values(NULL);
unlock tables;
check table t1;
lock tables t1 write, t1 as t0 write, t1 as t2 read;
insert into t1 values(NULL);
unlock tables;
check table t1;
lock tables t1 write, t1 as t0 write, t1 as t2 read, t1 as t3 read;
insert into t1 values(NULL);
unlock tables;
check table t1;
lock tables t1 write, t1 as t0 write, t1 as t2 write;
insert into t1 values(NULL);
unlock tables;
check table t1;
drop table t1;
#
# Test of locking and delete of files
#
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int);
lock tables t1 write,t1 as b write, t2 write, t2 as c read;
drop table t1,t2;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int);
lock tables t1 write,t1 as b write, t2 write, t2 as c read;
drop table t2,t1;
unlock tables;
# End of 4.1 tests
#
# Bug#23588 SHOW COLUMNS on a temporary table causes locking issues
#
create temporary table t1(f1 int);
lock tables t1 write;
insert into t1 values (1);
show columns from t1;
insert into t1 values(2);
drop table t1;
unlock tables;
# End of 5.0 tests
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