- `billable` tinyint(4) default NULL, # whether to include billable, not billable, or all records
- `invoice` tinyint(4) default NULL, # whether to include invoiced, not invoiced, or all records
- `paid_status` tinyint(4) default NULL, # whether to include paid, not paid, or all records
- `users` text default NULL, # Comma-separated list of user ids. Nothing here means "all" users.
- `period` tinyint(4) default NULL, # selected period type for report
- `period_start` date default NULL, # period start
- `period_end` date default NULL, # period end