Re: Old Debate, New Day - MVDB vs. Other DBs


"Ed Sheehan" <NOedsSPAM@xxxxxxxxxxxx> wrote in message
news:e9gufi$kuc$1@xxxxxxxxxxxxxxxxxxxx
Yes, subvalues can pose a problem when using the native query language.
Three points:


Mark, Tony, Chandru, QM people - How difficult would it be to add more
delimiters and the ability to parse them natively with report tools?

Not that touch, but it's all the OTHER stuff you have to change: BNF,
locate, insert, replace at both BASIC and SYSTEM levels. And then, of
course, you have to change the PVA expansions and reassemble the entire
system.

Actually, there are already three additional dimensions built into the
system. There are three "scan characters" sc1, sc2 and sc3. When you do a
"scan to delimiter", there's a byte that's set to tell the system what to
stop on. It looks like:

stop @ sm
stop @ at
stop @ vm
stop @ svm
stop @ sc1
stop @ sc2
stop @ sc3

It's used at lot for searching for a character (sc1) or a system delimiter.
x40 means you want to stop only at a segment mark. x7F stops at any system
delimiter or any of the 3 scan characters. But there's no syntax to make
use of it.

Mark Brown


.

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