Provided by: postgresql-doc-10_10.3-1_all bug

NAME

       SPI_fnumber - determine the column number for the specified column name

SYNOPSIS

       int SPI_fnumber(TupleDesc rowdesc, 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., 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.

ARGUMENTS

       TupleDesc rowdesc
           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.