Ivan Prenosil schrieb:

>
> Before you start developpinfg your blob filters, be aware that
> they can't be invoked
> - in sql command
> - in UDF
> - in PSQL
>
> The only way how to invoke blob filter is using BPB (blob parameter
> block), i.e. either using embedded sql precompiler, or using Firebird API,
> or using connection library that uses Firebird API.
>
> Ivan
> http://www.volny.cz/iprenosil/interbase/

Did I misunderstand something there? I thought that blob filters were
implicitly invoked when dealing with columns oder PSQL variables of
different blob subtypes, e.g.

FOR
SELECT tif_blob
FROM pic_table
INTO :jpg_var
DO...
in a SP (with a corresponding filter declarde)
???
Urs