SPI_gettype
Name
SPI_gettype -- Returns the type name of the specified attribute
Synopsis
SPI_gettype(tupdesc, fnumber)
Inputs
- TupleDesc tupdesc
- Input tuple description 
- int fnumber
- Attribute number 
Outputs
- char *
- The type name for the specified attribute number 
- SPI_result
Description
SPI_gettype 
   returns a copy of the type name for the specified attribute,
   or NULL on error.
Usage
Attribute numbers are 1 based.
Algorithm
Returns a newly-allocated copy of the type name.
(Use pfree() to release the copy when done with it.)