--- In firebird-support@yahoogroups.com, Alexandre Benson Smith
<iblist@...> wrote:

>
> try this one:
>
> select fl.rdb$field_length
> from rdb$relation_fields rf
> join rdb$fields fl
> on rf.rdb$field_source = fl.rdb$field_name
> where rf.rdb$relation_name = :ctable and rf.rdb$field_name = :cfield
> into :nlength;

Yes, you are right. Thank you, Alexandre.