SPI_FNUMBER(3)           PostgreSQL 16.2 Documentation          SPI_FNUMBER(3)

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., 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
       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.

PostgreSQL 16.2                      2024                       SPI_FNUMBER(3)