--- /dev/null
+-- @tag: letter_cleanup
+-- @description: Tabelle »letter«: Unbenutzte Spalten entfernen und andere Spalten umbenennen
+-- @depends: release_3_4_0
+
+ALTER TABLE letter RENAME COLUMN vc_id TO customer_id;
+ALTER TABLE letter_draft RENAME COLUMN vc_id TO customer_id;
+
+ALTER TABLE letter
+ DROP COLUMN close,
+ DROP COLUMN company_name,
+ DROP COLUMN employee_position,
+ DROP COLUMN jobnumber,
+ DROP COLUMN page_created_for,
+ DROP COLUMN rcv_address,
+ DROP COLUMN rcv_city,
+ DROP COLUMN rcv_contact,
+ DROP COLUMN rcv_country,
+ DROP COLUMN rcv_countrycode,
+ DROP COLUMN rcv_name,
+ DROP COLUMN rcv_zipcode,
+ DROP COLUMN salesman_position,
+ DROP COLUMN text_created_for,
+ ADD FOREIGN KEY (customer_id) REFERENCES customer (id);
+
+ALTER TABLE letter_draft
+ DROP COLUMN close,
+ DROP COLUMN company_name,
+ DROP COLUMN employee_position,
+ DROP COLUMN jobnumber,
+ DROP COLUMN page_created_for,
+ DROP COLUMN rcv_address,
+ DROP COLUMN rcv_city,
+ DROP COLUMN rcv_contact,
+ DROP COLUMN rcv_country,
+ DROP COLUMN rcv_countrycode,
+ DROP COLUMN rcv_name,
+ DROP COLUMN rcv_zipcode,
+ DROP COLUMN salesman_position,
+ DROP COLUMN text_created_for,
+ ADD FOREIGN KEY (customer_id) REFERENCES customer (id);