DBIx::Recordset::FileSeq generates unique numbers. State is kept in the
one table of a database accessable via DBI. With the new constructor you
give an open database handle and sepcify the the table where state should be kept.
Optionaly you can give a min and
a max values, which will be used for new sequences.
With <B>NextValB> you can get the next value
for the sequence of the given name.
The table must created in the following form:
name varchar (32),
primary key name
If the sequence value reaches the maxcnt value, NextVal will die with an
error message. If maxcnt contains null there is no limit.