Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XC.
   SPI_getrelname returns a copy of the name of the
   specified relation.  (You can use pfree to
   release the copy of the name when you don't need it anymore.)
  
Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XC.
input relation