SPI_fnumber — determine the column number for the specified column name
rowdesc, const char *
SPI_fnumber returns the column number for the column with the specified name.
colname refers to a system column (e.g.,
oid) 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.
input row description
const char *
Column number (count starts at 1 for user-defined columns), or
SPI_ERROR_NOATTRIBUTE if the named column was not found.
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