employee_id => { type => 'integer', not_null => 1 },
id => { type => 'serial', not_null => 1 },
itime => { type => 'timestamp', default => 'now()' },
employee_id => { type => 'integer', not_null => 1 },
id => { type => 'serial', not_null => 1 },
itime => { type => 'timestamp', default => 'now()' },