Note, if {@link setAutoCreateCacheTable AutoCreateCacheTable} is false
and you want to create the DB table manually by yourself,
you need to make sure the DB table is of the following structure:
CREATE TABLE pradocache (itemkey CHAR(128), value BLOB, expire INT)
CREATE INDEX IX_itemkey ON pradocache (itemkey)
CREATE INDEX IX_expire ON pradocache (expire)
Note, some DBMS might not support BLOB type. In this case, replace 'BLOB' with a suitable
binary data type (e.g. LONGBLOB in MySQL, BYTEA in PostgreSQL.)
Important: Make sure that the indices are non-unique!
