Thomas,
thanks, I know these _BLR columns, I was interested in RDB$UPDATE_FLAG itself,
whether there is a bug in FB, or whether it is considered obsolete and no more maintained,
or something else ...

Ivan

> From: Thomas Beckmann
> Sent: Tuesday, April 15, 2014 11:53 PM
> To: firebird-support@yahoogroups.com
> Subject: Re: [firebird-support] RDB$UPDATE_FLAG=0 for ordinary fields
>
> Hi Ivan,
>
> to identify computed fields, check RDB$COMPUTED_BLR in RDB$FIELDS and
> for views check RDB$VIEW_BLR in RDB$RELATIONS.
>
> Thomas
>
> Am 15.04.2014 23:39, schrieb Ivan Přenosil:
> > Hi,
> > I was under impression that RDB$RELATION_FIELDS.RDB$UPDATE_FLAG
> > is 0 for computed columns or columns of views, otherwise it should be 1.
> > But I found 0 in lots of ordinary fields where I would expect 1.
> > Anybody can explain this ?
> >
> > Ivan