SPI_getvalue
Name
SPI_getvalue -- return the string value of the specified column
Synopsis
char * SPI_getvalue(HeapTuple row, TupleDesc rowdesc, int colnumber)
Description
   SPI_getvalue returns the string representation
   of the value of the specified column.
  
   The result is returned in memory allocated using
   palloc.  (You can use
   pfree to release the memory when you don't
   need it anymore.)
  
Arguments
- HeapTuple row
-       input row to be examined
      
- TupleDesc rowdesc
-       input row description
      
- int colnumber
-       column number (count starts at 1)
      
Return Value
   Column value, or NULL if the column is null,
   colnumber is out of range
   (SPI_result is set to
   SPI_ERROR_NOATTRIBUTE), or no output function is
   available (SPI_result is set to
   SPI_ERROR_NOOUTFUNC).