SYNOPSIS
char * SPI_fname(TupleDesc rowdesc, int colnumber)
DESCRIPTION
SPI_fname returns a copy of the column name of the specified column. (You can use pfree to release the copy of the name when you don't need it anymore.)
ARGUMENTS
TupleDesc rowdesc
- input row description
int colnumber
- column number (count starts at 1)
RETURN VALUE
The column name; NULL if colnumber is out of range. SPI_result set to SPI_ERROR_NOATTRIBUTE on error.