Database

During the module installation, database queries will be executed.

CREATE TABLE IF NOT EXISTS oc_category_attribute (
  category_id INT(11) NOT NULL,
  attribute_id INT(11) NOT NULL,
  PRIMARY KEY (category_id, attribute_id)
)

and

ALTER TABLE oc_attribute_description ADD COLUMN `duty` TEXT NOT NULL

As a result, a new table category_attribute will be created with fields `category_id` and `attribute_id`.

And in the standard OpenCart table attribute_description, a field `duty` will be added to store Duty Templates.

The general diagram of tables serving attribute management and relationships between them is shown in the figure below.