File limit reached in Quick screen

[Robert Edis]

File limit reached in Quick screenWhy not just increase that 5 bit
allocationg to say 8?  Surely that would be an easy thing to do and have
virtually no impact on other logic other than extend the file limit.

HOWEVER, I have found that this limit helps to enforce better logic/coding
in quick screens.  In 10+ years of using PowerHouse I only came across ONE
instance why >31 files was ligigimate, and we found a work-around for that.

Blue
  -----Original Message-----
  From: powerh-l-admin@lists.sowder.com
[mailto:powerh-l-admin@lists.sowder.com]On Behalf Of Deskin, Bob
  Sent: Friday, November 05, 2004 5:44 AM
  To: powerh-l@lists.sowder.com
  Subject: RE: File limit reached in Quick screen


  The PowerHouse internal architecture is based on a large number of tables
that store information on things such as physical files, logical files,
items, fields, etc. These tables are all cross linked by a table entry id.
Guess what, the number of bits originally allocated for the number of files
in a screen was 5 bits giving 31 entries (2^5 - 1). Why 5 bits? Because in
those days (late 70s) we were working on the HP3000 under MPE and there was
a fixed data stack of 32K words (64K bytes). Every bit/byte was precious.
And we though that 31 was HUGE. And it was for a while.

  The thing is that to restructure the tables and find all the references
(and cross references in other tables and their references) is a major task.
It's not necessarily difficult but it is picky, time-consuming work. So it
was always a trade-off between doing that one thing versus many other
things. Based on priorities, resources, and user demand, the other things
always won.
  Bob Deskin
  Senior Product Manager, Application Development Tools
  Cognos Inc. 3755 Riverside Drive, Ottawa ON K1G 4K9 CANADA
  bob.deskin@cognos.com (613) 738-1338 ext 7268

    -----Original Message-----
    From: powerh-l-admin@lists.sowder.com
[mailto:powerh-l-admin@lists.sowder.com]On Behalf Of
Mikael.Olesen@qss-uk.com
    Sent: November 5, 2004 3:26 AM
    To: powerh-l@lists.sowder.com
    Subject: RE: File limit reached in Quick screen


    There are ways of working around the problem but I have always been a
bit annoyed

    about the 31 files limit. Why 31? and why don't Cognos change it? Bob?



    Kind Regards

    Mikael Olesen





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