SPI_getnspname — return the namespace of the specified relation
char * SPI_getnspname(Relation rel)
SPI_getnspname returns a copy of the name of
the namespace that the specified Relation
belongs to. This is equivalent to the relation's schema. You should
pfree the return value of this function when
you are finished with it.
Relation relinput relation
The name of the specified relation's namespace.