[firebird-support] FB3 external table

['livius' liviusliv...@poczta.onet.pl [firebird-support]]

Hi,

previously it was possible to change external table filename

UPDATE
RDB$RELATIONS r
SET r.RDB$EXTERNAL_FILE='c.txt'
WHERE
r.RDB$EXTERNAL_FILE='b.txt'

in FB3 it is prohibited. 
Is there some DDL statment to alter such table only file name?

regards,
Karol Bieniaszewski