We build a cron Job for Doi identifier reservation and registration.

dspace/etc/postgres/database_schema.sql

@@ -494,7 +494,8 @@ CREATE TABLE Doi
   doi_id           INTEGER PRIMARY KEY,
   doi              VARCHAR(256) UNIQUE,
   resource_type_id INTEGER,
-  resource_id      INTEGER
+  resource_id      INTEGER,
+  status           VARCHAR(20)
 );
 
 -- index by handle, commonly looked up