ingres_field_length() returns the length of a
field. This is the number of bytes used by the server to store
the field. For detailed information, see the Ingres/OpenAPI User
Guide - Appendix C.
Parameters
index
index
is the number of the field and must
be between 1 and the value given by
ingres_num_fields().
link
The connection link identifier. If not specified, the last opened link
is used.