SPI_gettypeid
Name
SPI_gettypeid -- Returns the type 
OID of the specified attribute
Synopsis
SPI_gettypeid(tupdesc, fnumber)
Inputs
- TupleDesc tupdesc
- Input tuple description 
- int fnumber
- Attribute number 
Outputs
- OID
- The type OID for the specified attribute number 
- SPI_result
Description
SPI_gettypeid 
   returns the type OID for the specified attribute.
Usage
Attribute numbers are 1 based.