Rbuilder 7.04 and IBObjects

rbuser

Hi,

I am looking for a Rbuilder 7.04 package update to IBO. I download all
versions available in ibo contributed site and all them seems have a problem
running report builder sample in my app.

I have a report of the type master-detail-detail using IBO native
datasets(tib_query) and my problem is that the one detail band are printed
in erratic positions on page, with larges blanks areas. The height of these
blank areas change increasing when I pass page by page to forward and
backward.

If I use the MasterDatapipeline and MasterFieldLinks in addition to
master-detail setup of IBO native dataset, the results are printed
correctly.

Does someone could give me a clue about what is wrong?


Thanks in advance,

Luiz

nardmoseley

I do not understand the question because you state "If I use the
MasterDatapipeline and MasterFieldLinks in addition to
master-detail setup of IBO native dataset, the results are printed
correctly."

What does that statement mean and what are trying to accomplish that is
different?

There are two types of data linking supported by ReportBuilder. Yo should
use one or the other, but not both. See the following tech tip....


------------------------------------------------------
Tech Tip: Linking SQL Queries for Master/Detail Data
------------------------------------------------------

The following example shows two options for linking SQL queries to create a
master/detail relationship.

In this example, we are using Delphi's DBDemos data to create a
Customer/Order relationship. Thus we wish to link the Orders detail to the
Customer master.

I. Delphi Query Linking
------------------------

a. Set the detail TQuery.DataSource property to point to the master
query's TDataSource component.

b. In the SQL "Where" clause for the detail query use a ':' followed by
the linking field name from the master:

example
select *
from orders
where orders.CustNo = :CustNo

Now each time the master record position changes, the detail query will
automatically be refreshed with the correct result set.


II. RB DataPipeline Linking
-----------------------------

a. Set the detail DataPipeline.MasterDataPipeline to point to the master
DataPipeline.

b. Use the detail DataPipeline.MasterFieldLinks property to define the
linking relationship

c. In the SQL for the detail, retrieve all records and sort them by the
linking master field:

select *
from Orders
order by CustNo


Notes:

1. Using RB DataPipeline, each query is executed only a single time - thus
performance is much faster.

2. RB Professional and Enterprise Editions include a visual Data environment
for creating SQL queries, defining linking relationships, and creating
Ask-At-Runtime parameters. Using the RB tools you could create the above
linked queries in about 10 seconds.


--
Tech Support mailto:support@digital-metaphors.com
Digital Metaphors http://www.digital-metaphors.com




--
Nard Moseley
Digital Metaphors Corporation
www.digital-metaphors.com

rbuser

nardmoseley

If you want to send to us the source code the IBOPipeline we can look at it.
We simply do not have the resources to develop what you are asking for.

The decision to not descend from TDataSet is huge mistake. The Delphi
TDataSet descendant architecture is provided to enable third party data
access components to be seemlessly added to Delphi. There are probably
50-100 third party data access component sets available that use this
approach. That is the power of an object oriented architecture and it works
very well. ReportBuilder's DBPipeline and DADE plug-in architecture
leverages this architecture. And we have customer's just about every data
access component out there.

I do not understand why you cannot use the DBPipeline and IBO dataset
descendant for your reports. That is the approach taken by our customers
that use IBO. We have an IBO plug-in for our Query tools and it is used
widely (if you have RB Professional or Enterprise, it is installed to
RBuilder\Demos\EndUser Databases\Interbase\IBO).





--
Nard Moseley
Digital Metaphors Corporation
www.digital-metaphors.com