SPI_gettype
Description
  
   SPI_gettype
  
  returns a copy of the data type name of the
   specified column.  (You can use
  
   pfree
  
  to
   release the copy of the name when you don't need it anymore.)
 
Return Value
The data type name of the specified column, or NULL on error. SPI_result is set to SPI_ERROR_NOATTRIBUTE on error.