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char * SPI_fname(TupleDesc rowdesc, int colnumber)
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.)
input row description
column number (count starts at 1)
The column name; NULL if colnumber is out of range. SPI_result set to SPI_ERROR_NOATTRIBUTE on error.