Re: [bdbxml] Document modifications are not applied

I tested that query:

<dbxml>query 'collection('xmachberk.dbxml')/kenndaten[<at>doc_id="d378"]/
felder_als_attribute/ <at>double_feld_r'

wich returned the following result:

()double_feld_r="1,0"

I will try your other suggestions as soon as possible, which means 
monday morning.

Many thanks to all so far.

Stephan


George Feinberg wrote:

>
> On Jun 24, 2005, at 9:54 AM, Stephan Korthoff wrote:
>
>> I tried to run that query on the console and it returned the  desired 
>> result.
>
>
> Which query?  The one using "collection()" or the one that does not?
> You need to do the latter to be sure it's correct.
> What series of commands did you use on the console?
> Here is an example of how to do a context-based query (where it
> queries based on previous results):
>
> dbxml> query "doc('contName/docName')"
> 1 objects returned for eager expression 'doc('mem/foo')'
>
> dbxml> contextQuery "/root/a"
> 1 objects returned for expression '/root/a'
>
> (in the above, the content of the document was "<root><a/></root>")
>
> If you want to try again, you have to execute the initial "doc" query
> again to reset the context.
>
>
> There are at least 2 reasons why you will not see modifications, and
> ways to check them:
>
> 1.  The query expression passed to execute() returns no results,
> so nothing is modified.  Remember that the expression needs
> to be written as if it starts with the document root.  Leading "/" or  
> maybe
> "./" and no collection() or doc().
>     o test this by printing the result returned by the  
> XmlModify.execute(),
>     which is the number of modifications made.  This will be the same
>     as the number of results returned by the query.  If it's 0, your  
> query
>      is incorrect, or your document is not what you think.
>
> 2.  The modifications are not being written back.  You said
> that the XmlUpdateContext is set to do this.
>     o verify this using XmlUpdateContext.getApplyChangesToContainer(),
>     and make sure the value is true.
>
>
>
>>
>> Stephan
>>
>>
>>
>>
>>> --- Ursprüngliche Nachricht ---
>>> Von: George Feinberg <[email protected]>
>>> An: Stephan Korthoff <[email protected]>
>>> Betreff: Re: [bdbxml] Document modifications are not applied
>>> Datum: Fri, 24 Jun 2005 09:35:05 -0400
>>>
>>>
>>> All I can think of is that your query is not actually returning
>>> results, which means there will be no modifications.
>>> Try tuning your query so you know it's selecting
>>> the desired attribute using a combination of:
>>>      XmlManager.prepare()
>>> and this execute method:
>>>      XmlQueryContext.execute(XmlValue&, XmlQueryContext &, u_int32_t
>>> flags)
>>>
>>> Use the XmlValue object based on your document as the first argument.
>>>
>>> George
>>>
>>>
>>>> I tried your suggestion but the result is still the same.
>>>>
>>>> Stephan
>>>>
>>>>
>>>> George wrote:
>>>>
>>>> I see it now.  The context item for your modification is the
>>>> document itself, so you query for the modification must
>>>> take that into consideration.
>>>> So, instead of:
>>>>      BerkManager.prepare("collection('xmachberk.dbxml')/kenndaten
>>>> [ <at> doc_id=d" +                    String.valueOf(intDocId) +"]/
>>>> felder_als_attribute/ <at> double_feld_r", context);
>>>> You should use:
>>>>      BerkManager.prepare("./kenndaten[ <at> doc_id=d" +  
>>>> String.valueOf
>>>> (intDocId) +"]/felder_als_attribute/ <at> double_feld_r", context);
>>>>
>>>> Or something that is relative to the root of the document.
>>>>
>>>> George
>>>>
>>>>
>>>>
>>>>> Does nobody have an idea what the problem could be?
>>>>>
>>>>> Stephan
>>>>>
>>>>>
>>>>> Stephan Korthoff wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> I've got a problem with the modification of documents. I took the
>>>>>> modification example from sleepycat.com and
>>>>>> implemented an attribute value change as follows:
>>>>>>
>>>>>>
>>>>>>   ....             try
>>>>>> {
>>>>>>   XmlModify BerkModifier = BerkManager.createModify();
>>>>>>   XmlQueryContext context = BerkManager.createQueryContext();
>>>>>>
>>>>>>   XmlQueryExpression BerkQExp =
>>>>>> BerkManager.prepare("collection('xmachberk.dbxml')/kenndaten
>>>>>> [ <at> doc_id=d" +                    String.valueOf(intDocId) +
>>>>>> "]/felder_als_attribute/ <at> double_feld_r", context);
>>>>>>
>>>>>>   System.out.println("DEBUG Anfrage:
>>>>>> collection('xmachberk.dbxml')/kenndaten[ <at> doc_id=d"
>>>>>> +                    String.valueOf(intDocId) +
>>>>>> "]/felder_als_attribute/ <at> double_feld_r");
>>>>>>
>>>>>>   BerkModifier.addUpdateStep(BerkQExp, newAttributeValue );
>>>>>>    System.out.println("DEBUG retdoc: " + retDoc.getContentAsString
>>>>>> ());
>>>>>>
>>>>>>   XmlDocument retDoc = BerkContainer.getDocument(docId);
>>>>>>
>>>>>>   XmlValue docValue = new XmlValue(retDoc);
>>>>>>              System.out.println("DEBUG docValue asString: " +
>>>>>> docValue.asString());
>>>>>>                          BerkModifier.execute( docValue, context,
>>>>>> BerkUpdContext);
>>>>>>              XmlDocument retDoc2 = BerkContainer.getDocument
>>>>>> (docId); // +
>>>>>> String.valueOf(intDocId));
>>>>>>              System.out.println("DEBUG docValue ret2: " +
>>>>>> retDoc2.getContentAsString());
>>>>>>   }
>>>>>>
>
>
>
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