CentOS 7.0 - man page for spi_getnspname (centos section 3)

SPI_GETNSPNAME(3)					  PostgreSQL 9.2.7 Documentation					 SPI_GETNSPNAME(3)

NAME
       SPI_getnspname - return the namespace of the specified relation

SYNOPSIS
       char * SPI_getnspname(Relation rel)

DESCRIPTION
       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.

ARGUMENTS
       Relation rel
	   input relation

RETURN VALUE
       The name of the specified relation's namespace.

PostgreSQL 9.2.7						    2014-02-17							 SPI_GETNSPNAME(3)