pg_put_line() sends a NULL-terminated string to the PostgreSQL backend server. This is useful for example for very high-speed inserting of data into a table, initiated by starting a PostgreSQL copy-operation. That final NULL-character is added automatically. Возвращает TRUE в случае успешного завершения, FALSE в случае возникновения ошибки.
Замечание: The application must explicitly send the two characters "\." on the last line to indicate to the backend that it has finished sending its data.
See also pg_end_copy().
Пример 1. High-speed insertion of data into a table