SPI_fname
SPI_fname — determine the column name for the specified column number
Synopsis
char * SPI_fname(TupleDescrowdesc, intcolnumber)
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
TupleDescrowdescinput row description
intcolnumbercolumn 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.