Using XML data source for primary and multiple subreports - impact of.

Posted on 2007-11-27
Medium Priority
Last Modified: 2010-04-21
This is a follow up to Q_22981434.  I would like to pursue using XML as a datasource for some of our reports to compensate for 1. Reports that hit the database upon refresh/prompt for date range, and 2. If possible, to create a navigable hierarchy.

I'm wanting to be sure I understand the concepts and objectives.  The accepted response and use cases that would solve the bulk of the problems associated with large (in data) hierarchical and grouped reports.

'... create the report while physically connected to the Database, ... then create a XML Schema of the Data ... need and ... use that one Data source for the main report and all sub reports.  The linking should automatically stay intact as long as the column names remain the same and keys are respected in the schema... '  

What I think I want to find out is the following:

What is the intended content assuming no problems creating the report with an xml data source.?
Assume no problems creating a schema that matches the original data set.

The XML Source file, as example Sales.xml, is used as the data source for both
the primary (main) report and all subreports.  What then does the resulting report do or not do that would justify using an xml source.  Assume that the primary objective achieved would be a dataset that does not tickle the database.

-- is the primary benefit the utilization of hierarchical data?
-- is the primary benefit a report that doesn't need / require a refresh until the next scheduled run?
-- assume that all linking stays intact, and that all of the column names remain the same, and that all keys are respected in the xsd schema.
-- assume that there are two processes of development, the designing of the report while connected to the database and the alteration of all primary and subreports for an xml dataset.

Am I correct to assume here that the report becomes a navigavable hierarchy for purposes of viewing large amounts of data from a database in a Crystal report.

Note that although this scenario is one for Crystal.net, that I am using Enterprise Crystal report instances on Infoview, having scheduled the reports each morning.

Any suggestions and comments welcome.  I will gladly sent files and code upon request.

Thanks in advance,


Remove the word Not from the 2nd comparison in the code snippet - my bad.
Cross reference to
'' Takes too long!! Too many records !!  Too much Grouping !!  Crystal wants to refresh !!
DIM strFilter As String
blnIsAdmin = True
strFilter   = totext(CurrentCEUserName)
If strFilter <> "Administrator" Then
   RESULT1 = not ( strFilter in   {Command.Matching} )
End If
X = funDateRange(MAXIMUM({Command.DIM_CALENDAR_DT},{Command.STORE_ID}),"Daily")

Open in new window

Question by:billinb
LVL 101

Accepted Solution

mlmcc earned 2000 total points
ID: 20370682
You will have to convert the reports to change from the database to the XML file.  That may or may not be a seamless task.  To check, I would build a small report against the database then convert it to use the XML file.
The reason it may be trouble is the two methods require different database drivers.

I am not saying it won't work but just that it may not be as easy as simply changing the database.

I have found in using XML files that they are inherently slow especially when you start linking them together.

Are the users really needing to hit the database (remember an XML file doesn't change until you reload it with new data so if they will be running reports against it, it may be just as easy to run the reports and export them to PDF for viewing purposes.


Author Closing Comment

ID: 31411365
The users are not needing to hit the database.  In fact, I'll go one step further and say that it takes some crafty design in order for the end user to know that they have, indeed by design hit the database when changing a prompt or hitting refresh.

I wonder if there's anything to your implied suggestion of using an xml report to navigate a serieas of pdf files.  Maybe the way to work around the slow return / link with an xml source is to keep it small.

Thanks for your reply.

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

There have always been a lot of questions related to when Crystal Reports evaluates report components (such as formulas, summaries, cross-tabs, charts, to name a few examples). Crystal Reports uses a two-pass reporting process to provide greater …
Hello everyone, Hope you find this as helpful as we did. We have on the company I work for an application built in Delphi V with Crystal Reports 8. We all know that Crystal & Delphi can be temperamental sometimes and the worst thing is, nearly…
This video tutorial shows you the steps to go through to set up what I believe to be the best email app on the android platform to read Exchange mail.  Get the app on your phone: The first step is to make sure you have the Samsung Email app on your …
In the video, one can understand the process of resizing images in single or bulk. Kernel Bulk Image Resizer is an easy to use tool for resizing large number of images. One can add and resize multiple images with this tool in single go. The video sh…

624 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question