at moment, function adempiere.documentno is owner by postgresql. it should correct to adempiere. [refer detail here](https://mattermost.idempiere.org/idempiere/pl/khefz18mri8tuensmheefon6jo)
Thanks , to keep the migration scripts in sync on oracle and postgres we use to commit an empty script for the other database just as a placeholder.
I committed a fix with that added.