pg_field_is_null Test if a field is &null; intpg_field_is_null resourceresult introw mixedfield pg_field_is_null test if a field is &null; or not. It returns 1 if the field in the given row is &null;. It returns 0 if the field in the given row is NOT &null;. Field can be specified as column index (number) or fieldname (string). Row numbering starts at 0. This function used to be called pg_fieldisnull().