45.2. Interface Support Functions
- SPI_fname - determine the column name for the specified column number
 - SPI_fnumber - determine the column number for the specified column name
 - SPI_getvalue - return the string value of the specified column
 - SPI_getbinval - return the binary value of the specified column
 - SPI_gettype - return the data type name of the specified column
 - SPI_gettypeid - return the data type OID of the specified column
 - SPI_getrelname - return the name of the specified relation
 - SPI_getnspname - return the namespace of the specified relation
 - SPI_result_code_string - return error code as string
 
  The functions described here provide an interface for extracting
  information from result sets returned by
  
   SPI_execute
  
  and
  other SPI functions.
 
All functions described in this section can be used by both connected and unconnected C functions.