Upon first installation of the database, the user and all database objects (tables, procedures, etc.) are assigned to the table space that has been set as the default tablespace in the database.
For Oracle databases, a schema trigger must be created prior to installation (<DB_USER> is to be replaced by the name of the database user):
CREATE OR REPLACE TRIGGER ON_LOGON_PLANTA_<DB_USER>
AFTER LOGON ON SCHEMA WHEN ( USER = 'DB_USER')
BEGIN
execute immediate('alter session set nls_date_format="DD.MM.RRRR"');
EXCEPTION
WHEN OTHERS THEN
NULL;
END;