-- DB version: 3.19 -> 3.19.1

ALTER TABLE S_DF07 ALTER COLUMN doc_num TYPE varchar(6);
ALTER TABLE S_DF06 ALTER COLUMN doc_num TYPE varchar(6);
ALTER TABLE S_DF54 ALTER COLUMN doc_num TYPE varchar(6);
ALTER TABLE S_DF55 ALTER COLUMN doc_num TYPE varchar(6);
ALTER TABLE S_DF57 ALTER COLUMN doc_num TYPE varchar(6);