text: \copy RXNATOMARCHIVE from '{RRF-DIR}/RXNATOMARCHIVE.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNCONSO from '{RRF-DIR}/RXNCONSO.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNREL from '{RRF-DIR}/RXNREL.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNSAB from '{RRF-DIR}/RXNSAB.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNSAT from '{RRF-DIR}/RXNSAT.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNSTY from '{RRF-DIR}/RXNSTY.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNDOC from '{RRF-DIR}/RXNDOC.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNCUICHANGES from '{RRF-DIR}/RXNCUICHANGES.RRF.lesspipe' with (delimiter '|', null '');
  \copy RXNCUI from '{RRF-DIR}/RXNCUI.RRF.lesspipe' with (delimiter '|', null '');