SPI_fname — determine the column name for the specified column number
char * SPI_fname(TupleDescrowdesc
, intcolnumber
)
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.)
TupleDesc rowdesc
input row description
int colnumber
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.
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