Syntax:
    tbl_name [AS alias] {READ [LOCAL] | [LOW_PRIORITY] WRITE}
    [, tbl_name [AS alias] {READ [LOCAL] | [LOW_PRIORITY] WRITE}] ...

are locked by other threads, it blocks until all locks can be acquired.
that are locked by the current thread are implicitly unlocked when the
thread issues another LOCK TABLES, or when the connection to the server
is closed.

A table lock protects only against inappropriate reads or writes by
other clients. The client holding the lock, even a read lock, can
perform table-level operations such as DROP TABLE.
