pg_end_copy Sync with PostgreSQL backend boolpg_end_copy resourceconnection 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. &return.success; For further details and an example, see also pg_put_line.