SPI_fnumber
SPI_fnumber
SPI_fnumber - determine the column number for the specified column name
Synopsis
int SPI_fnumber(TupleDescrowdesc, const char *colname)
Description
SPI_fnumber
returns the column number for the
column with the specified name.
If
colname
refers to a system column (e.g.,
ctid
) then the appropriate negative column number will
be returned. The caller should be careful to test the return value
for exact equality to
SPI_ERROR_NOATTRIBUTE
to
detect an error; testing the result for less than or equal to 0 is
not correct unless system columns should be rejected.
Arguments
-
TupleDescrowdesc -
input row description
-
const char *colname -
column name
Return Value
Column number (count starts at 1 for user-defined columns), or
SPI_ERROR_NOATTRIBUTE
if the named column was not
found.