pg_end_copy() syncs the PostgreSQL frontend (usually a web server process) with the PostgreSQL server after doing a copy operation performed by pg_put_line(). pg_end_copy() must be issued, otherwise the PostgreSQL server may get out of sync with the frontend and will report an error. Devuelve TRUE si todo se llevó a cabo correctamente, FALSE en caso de fallo.
For further details and an example, see also pg_put_line().