Best Practices - Relational to XML?

Oracle 10gR2 Enterprise Edition 10.2.0.4.0
Read the OpenWorld 2009 Oracle XML DB Design Guidelines, paraphrased as:
- Use Case:
-- Data already in relational form
-- Need to generate different XML shape for presentation, exchange, reporting
- Recommendations:
-- Do Use XMLElement(), XMLForest(), XMLAgg() SQL/XML to define views
-- Do Use XQuery with ora:view() for complex XML report generation
-- Don't use use DBMS_XMLGEN(), DBMS_XMLQUERY(), XSU
--- Lower perf, less declarative
Although, Mark Drake's post in here Performance problems with XMLTABLE and XMLQUERY involving relational data has me wondering if the "Do Use XQuery with ora:view() for complex XML report generation" point has some caveats?
I'm starting to build a solution to send relational data as XML to another system, where the relational data consists of several joined tables, including many one-to-one joins and a few one-to-many joins (including a pair of one-to-many joins where the rows from two joined tables must be interleaved). ( Note - To date, all of our XML processing has been for presentation and has been done on Windows .NET client apps. )
Have built some simple SQL/XML views with XMLElement(), XMLAttributes(), XMLForest(), ... to begin building my SQL/XML and XML DB experience base, and am now working on an XQuery-based solution for the real solution.
Questions:
1. For performance with multiple 1:1 joined tables, should SQL VIEWs be preferred to building multiple FLOWR joins in XQuery?
2. Can a relational tables with CLOB columns be referenced in the XQuery for clause of an SELECT XMLQuery() query?
Note: Q2 is due to performance issues I encountered - when I added an XQuery for clause referencing a relational table containing several CLOB columns, the SELECT XMLQuery() query never returned.
Alex

stupid remark removed

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Sparc64
11.2.0.2
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{code}
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Hi,
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BTW... you may want to post here next time, in the dedicated forum : {forum:id=34}
Mark Drake is one of the regular user, along with Marco Gralike you've probably seen too at OOW.
Edited by: odie_63 on 18 oct. 2012 21:55

Best Practices:: How to generate XML file from a ResultSet

Hi all,
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Best practice "changing several related objects via BDT" (Business Data Toolset) / Mehrere verbundene Objekte per BDT ändern

Hallo,
I want to start a
discussion, to find a best practice method to change several related master
data objects via BDT. At the moment we are faced with miscellaneous requirements,
where we have a master data object which uses BDT framework for maintenance (in
our case an insured objects). While changing or creating the insured objects a
several related objects e.g. Business Partner should also be changed or
created. So am searching for a best practices approach how to implement such a
solution.
One Idea was to so call a
report via SUBMIT AND RETURN in Event DSAVC or DSAVE. Unfortunately this implementation
method has only poor options to handle errors. Second it is also hard to keep LUW
together.
Another idea is to call an additional
BDT instance in the DCHCK-event via FM BDT_INSTANCE_SELECT and the parameters
iv_xpush_classic = ‘X’ and iv_xpop_classic = ‘X’. At this time we didn’t get
this solution working correctly, because there is always something missing
(e.g. global memory is not transferred correctly between the two BDT instances).
So hopefully you can report
about your implementations to find a best practice approach for facing such
requirements.
Hallo
ich möchte an der Stelle eine Diskussion starten um einen Best Practice
Ansatz zu finden, der eine BDT Implementierung/Erweiterung beschreibt, bei der
verschiedene abhängige BDT-Objekte geändert werden. Momentan treffen bei uns
mehrere Anforderungen an, bei deinen Änderungen eines BDT Objektes an ein
anderes BDT Objekte vererbt werden sollen. Sprich es sollen weitere Objekte geänderte
werden, wenn ein Objekt (in unserem Fall ein Versicherungsvertrag) angelegt
oder geändert wird (zum Beispiel ein Geschäftspartner)
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durchführen. Allerdings gibt es hier Probleme mit der Fehlerbehandlung, da
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LUW zu garantieren.
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DCHCK per FuBA BDT_INSTANCE_SELECT und den Parameter iv_xpush_classic = ‘X’ and
iv_xpop_classic = ‘X’ eine neue BDT Instanz zu erzeugen. Leider konnten wir diese
Lösung nicht endgültig zum Laufen bekommen, da es immer Probleme beim
Übertragen der globalen Speicher der einzelnen BDT Instanzen gab.
Ich hoffe Ihr könnt hier eure Implementierungen kurz beschreiben, dass wir
eine Best Practice Ansatz für das Thema finden können
BR/VG
Dominik

[CS5.5/6] - XML / Data Merge questions & Best practice.

Fellow Countrymen (and women),
I work as a graphic designer for a large outlet chain retailer which is constantly growing our base of centers. This growth has brought a workload that used to be manageable with but two people to a never ending sprint with five. Much of what we do is print, which is not my forte, but is also generally a disorganized, ad-hoc affair into which I am wading to try to help reduce overall strain.
Upon picking up InDesign I noted the power of the simple Data Merge function and have added it to our repetoire in mass merging data sources. There are some critical failures I see in this as a tool going forward for our purposes, however:
1) Data Merge cannot handle information stored and categorized in a singular column well. As an example we have centers in many cities, and each center has its own list of specific stores. Data merge cannot handle a single column, or even multiple column list of these stores very easily and has forced us into some manual operations to concatenate the data into one cell and then, using delimiter characters, find and replace hard returns to seperate them.
2) Data Merge offers no method of alternate alignment of data, or selection by ranges. That is to say: I cannot tell Data merge to start at Cell1 in one column, and in another column select say... Cell 42 as the starting point.
3) Data merge only accepts data organized in a very specific, and generally inflexible pattern.
These are just a few limitations.
ON TO MY ACTUAL DILEMMA aka Convert to XML or not?
Recently my coworker has suggested we move toward using XML as a repository / delivery system that helps us quickly get data from our SQL database into a usable form in InDesign.
I've watched some tutorials on Lynda.com and havent yet seen a clear answer to a very simple question:
"Can XML help to 'merge' large, dynamic, data sets like a list of 200 stores per center over 40 centers based off of a single template file?"
What I've seen is that I would need to manually duplicate pages, linking the correct XML entry as I go rather than the program generating a set of merged pages like that from Data Merge with very little effort on my part. Perhaps setting up a master page would allow for easy drag and drop fields for my XML data?
I'm not an idiot, I'm simply green with this -- and it's kind of scary because I genuinely want us to proceed forward with the most flexible, reliable, trainable and sustainable solution. A tall order, I know. Correct me if I'm wrong, but XML is that beast, no?
Formatting the XML
Currently I'm afraid our XML feed for our centers isnt formatted correctly with the current format looking as such:
<BRANDS>
     <BRAND>
          • BrandID = xxxx
          [Brand Name]
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          [WebMoniker]
          <CATEGORIES>
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                    • xmlns = URL
                    • WebMoniker = category_type
          <STORES>
               <STORE>
                    • StoreID = ID#
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I dont think this is currently usable because if I wanted to create a list of stores from a particular center, that information is stored as an attribute of the <Store> tag, buried deep within the data, making it impossible to 'drag-n-drop'.
Not to mention much of the important data is held in attributes rather than text fields which are children of the tag.
Im thinking of proposing the following organizational layout:
<CENTERS>
     <CENTER>
     [Center_name]
     [Center_location]
          <CATEGORIES>
               <CATEGORY>
                    [Category_Type]
                    <BRANDS>
                         <BRAND>
                              [Brand_name]
My thought is that if I have the <CENTER> tag then I can simply drag that into a frame and it will auto populate all of the brands by Category (as organized in the XML) for that center into the frame.
Why is this important?
This is used on multiple documents in different layout styles, and since our store list is ever changes as leases end or begin, over 40 centers this becomes a big hairy monster. We want this to be as automated as possible, but I'd settle for a significant amount of dragging and dropping as long as it is simple and straightforward. I have a high tollerance for druding through code and creating work arounds but my co-workers do not. This needs to be a system that is repeatable and understandable and needs to be able to function whether I'm here or not -- Mainly because I would like to step away from the responsibility of setting it up every time
I'd love to hear your raw, unadulterated thoughts on the subject of Data merge and XML usage to accomplish these sorts of tasks. What are your best practices and how would you / do you accomplish these operations?
Regards-
Robert

From what I've gleaned through watching Lynda tutorials on the subject is that what I'm hoping to do is indeed possible.
Peter, I dont disagree with you that there is a steep learning curve for me as the instigator / designer of this method for our team, but in terms of my teammates and end-users that will be softened considerably. Even so I'm used to steep learning curves and the associated frustrations -- but I cope well with new learning and am self taught in many tools and programs.
Flow based XML structures:
It seems as though as long as the initial page is set up correctly using imported XML, individual data records that cascade in a logical fashion can be flowed automatically into new pages. Basically what you do is to create an XML based layout with the dynamic portion you wish to flow in a single frame, apply paragraph styles to the different tags appropriately and then after deleting unused records, reimport the XML with some specific boxes checked (depending on how you wish to proceed).
From there simply dragging the data root into the frame will cause overset text as it imports all the XML information into the frame. Assuming that everything is cascaded correctly using auto-flow will cause new pages to be automatically generated with the tags correctly placed in a similar fashion to datamerge -- but far more powerful and flexible.
The issue then again comes down to data organization in the XML file. In order to use this method the data must be organized in the same order in which it will be displayed. For example if I had a Lastname field, and a Firstname field in that order, I could not call the Firstname first without faulting the document using the flow method. I could, however, still drag and drop content from each tag into the frame and it would populate correctly regardless of the order of appearance in the XML.
Honestly either method would be fantastic for our current set of projects, however the flow method may be particularly useful in jobs that would require more than 40 spreads or simple layouts with huge amounts of data to be merged.

When to use unattend.xml in task sequence - best practice?

Hi, I've tried researching this but not found an answer to my specific query.
We have ConfigMgr 2012 R2 with MDT 2013 although I don't think this is an MDT specific question.
I'm trying to create a Build and Capture task sequence for our Windows Server 2008 R2 and Server 2012 /2012R2 server builds utilising an UNATTEND.XML file to make some customisations that can be deployed for every build afterwards in a Deployment Task Sequence.
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In CM 2012R2 you now have the option under the "Apply Operating System" to use a captured image or an original installation source. However they work differently if you specify the use of the same unattended answer file.
The "image" deployment ignores all of the "add features" sections of the XML file and the "installation source" loses the configuration options from SNMP from the XML file. When you then deploy the captured image using
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What is best practice for specifying an unattend.xml file in a task sequence. Is it in the build and capture TS or in the Deployment TS ?
or
Do I need multiple XML files, one for build and capture with some bits in and another for deployment with the rest in?
or
Should I be doing something else?
Although this is specifically asking about Server O/S we will be using the same methodology for Windows 7 deployment.

In this case DISM is only used to add the actual features... for configuration you could use a simple script that runs afterwards. Sample registry file:
SAMPLE REG FILE - HKLM-SNMP.reg
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters]
"NameResolutionRetries"=dword:00000010
"EnableAuthenticationTraps"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters\PermittedManagers]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters\RFC1156Agent]
"sysServices"=dword:0000004f
"sysLocation"=""
"sysContact"=""
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters\TrapConfiguration]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters\TrapConfiguration\public]
"1"="127.0.0.1"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SNMP\Parameters\ValidCommunities]
"public"=dword:00000004
Sample batch file:
SAMPLE SCRIPT FILE - ConfigureSNMPService.bat
@ECHO OFF
net stop "SNMP Service"
regedit /s HKLM-SNMP.reg
net start "SNMP Service"
Also some settings for SNMP can be controlled through group policy:
http://serverfault.com/questions/285762/group-policy-for-multiple-snmp-permitted-managers

Best practice for optimizing processing of big XMLs?

All,
What is the best practice when dealing with large XML files ... (say couple of MBs).
Instead of having to read the file from the file system everytime a static method is run, what would be the best way in which the program reads the file once and then keeps it in memory. So the next time it would not have to read and parse it all over again?
Currently my code just read the file in the static method like ...
public static String doOperation(String path,...) throws Exception
try{
String masterFile = path+"configfile.xml";
Document theFile = (Document)getDocument(masterFile);
Element root = theFile.getDocumentElement();
NodeList nl = root.getChildNodes();
// ... operations on file
Optimization tips and tricks most appreciated :-)
Thanks,
David

The best practice for multi-megabyte XML files is not to have them at all.
However if you must, presumably you don't need all of the information in your XML, repeatedly. Or do you? If you need a little bit of it here, then another little bit of it there, then yet another little bit of it later, then you shouldn't have stored your data in one big XML.
Sorry if that sounds unhelpful, but I'm having trouble imagining a scenario when you need all the data in an XML document repeatedly. Perhaps you could expand on your design?
PC²

Info on best practices to add jar references in server.xml

Hi
I want to add some jar references (pcl.jar & struts.jar) in server.xml.
Can someone let me know if this can be added to <shared-library name="global.tag.libraries" version="1.0" library-compatible="true"> ?
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Thanks
Badri

If you want to use it in BPEL it should be placed in oracle.bpel.common
cheers
James

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