Method: Assign report columns once full table name has been assigned.

Method: Set up all the hooks for maintaining and populating table data.

Method: Returns an array of ids of included coupons, based on query arguments from the user.

Method: Updates the database query with parameters used for Products report: categories and order status.

Method: Fills ORDER BY clause of SQL request based on user supplied parameters.

Method: Maps ordering specified by the user to columns in the database/fields in the data.