Using a xpath expression stored in a variable

Hi All,
I have an xpath expression which is stored in the database which I need to use against the request XML. I am able to retrieve this Xpath expression from the database, but not able to use it against the request XML.
Xpath expression got from the database is: /request/param//name.
I have tried $body/$XpathVariable, this does not work. I can not hard code this expression during my design time, so the details of the expression has to be fetched at run time.
Any ideas to get the value would helpful.
Thanks

try to assign this value to a temp variable and then in the XqueryExpression try to retrieve it starting with "//"

Similar Messages

Using the XPATH expression function in Transformation activity

Hi,
I have to map the variable value(other than the source variable) to one of the node in the target variable in the transformation activity. For that I am using the XPATH expression function bpws:getVariableData ('variableName') and map it to corrsponding target node. But this mapping is not at all happening. The same prolem occurs while using function ora:getInstanceID() in transformation function. Then I could find a metalink note id: 387381.1,saying it as the bug in 10.1.2.2 BPEL PM, which they are covering in the next release. But our BPEL PM version is 10.1.3.3. But still the same type of problem occurs.
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Hi,
I dont understand why would you need to use the "bpws:getVariableData" function.
When you are mapping a source-node to a target-node, it usually assigns the value in the source-node to the target-node, which is as good as using the "bpws:getVariableData" function.
So, technically speaking you need to use this function explicitly to achieve that ...
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Madhu.

Selecting nodes using an XPath expression

Assuming that I have a DOM Document object containing a valid XML file, what is the quickest way to select a subset of nodes from the document using an XPath expression. I would like the results in either a NodeList object or another Document object.
Microsoft has a way to do this using a single method named 'selectNodes'. Why is querying an XML document so hard to do using java? Am I missing something?

In case you're using Xalan take a look at org.apache.xpath.XPathAPI. The function selectNodeList(...) probably does what you want.
Good luck.

ABAP-Logic/Command: Execute An Expression Stored In A Variable

Consider the following code - <b>Is it possible to execute the statement/expression stored in variables expression1, expression2 and expression3?</b> The result should be:
sum = 5 , subname = 'First' & i_output should be sorted by lifnr and ebeln.
*---DATA DECLARATIONS
DATA: sum         TYPE i,
      op1         TYPE i,
      op2         TYPE i,
      name        TYPE string,
      subname     TYPE string,
      offset      TYPE i,
      expression1 TYPE string,
      expression2 TYPE string,
      expression3 TYPE string.
DATA: BEGIN OF i_output OCCURS 0,
      lifnr TYPE lfa1-lifnr,
      ebeln TYPE ekko-ebeln,
      ebelp TYPE ekpo-ebelp,
      END OF i_output.
*---BUILD EXPRESSION 1
op1 = 2.
op2 = 3.
expression1 = 'sum = op1 + op2'.
*---BUILD EXPRESSION 2
name   = ' First Name'.
offset = 5.
expression2 = 'subname = name+1(offset)'.
*---POPULATE ITAB I_OUTPUT
MOVE: '111111' TO i_output-lifnr,
      'PO1'    TO i_output-ebeln,
      '010'    TO i_output-ebelp.
APPEND i_output.
MOVE: '111511' TO i_output-lifnr,
      'PO1'    TO i_output-ebeln,
      '020'    TO i_output-ebelp.
APPEND i_output.
MOVE: '111111' TO i_output-lifnr,
      'PO3'    TO i_output-ebeln,
      '010'    TO i_output-ebelp.
APPEND i_output.
MOVE: '114111' TO i_output-lifnr,
      'PO2'    TO i_output-ebeln,
      '010'    TO i_output-ebelp.
APPEND i_output.
MOVE: '111121' TO i_output-lifnr,
      'PO2'    TO i_output-ebeln,
      '020'    TO i_output-ebelp.
APPEND i_output.
CLEAR i_output.
*---BUILD EXPRESSION 3
expression3 = 'sort i_output by lifnr ebeln'.
Thanks in advance!

> You can achieve this by generating a subroutine pool
> dynamically, passing the code lines (expressions) as
> an internal table. Here is the syntax:
>
> GENERATE SUBROUTINE POOL itab NAME name.
>
> Hope this helps,
> Bhanu
Hey Banu, thanks!
Message was edited by: Sam

Reuse a variable in OSB XPATH expression editor

I have a problem with replacing activity in Oracle Service Bus.
I created a variable with the follow content
<response>
<operationResponse name="OPERATION1" result=""/>
<operationResponse name="OPERATION2" result=""/>
<operationResponse name="OPERATION3" result=""/>
<operationResponse name="OPERATION4" result=""/>
</response>
For each operationResponse I call a businessProxy that invokes an external webservice. If this call is made with success, I replace `result=""` with `result="1"`.
I have created a replace activity like this:
<con3:replace contents-only="true" varName="responseElement"> 
<con2:id>_ActionId-3886365367816551561--27a55993.13f0a38ab8f.-7c95</con2:id>
<con3:location>
<con2:xpathText>./operationResponse/@result</con2:xpathText>
</con3:location>
<con3:expr>
<con2:xqueryText>"1"</con2:xqueryText>
</con3:expr>
</con3:replace>
After running this program, all the attributes "results" are replaced by "1", if the businessService is called successfully.
The problems is that I need to replace the attribute "result" only for the element operationResponse that have the attribute "name" equal to the operationResponse that invokes the businessService.
I have created a variable called operationName that contains the current response/operationResponse. I used ./operationResponse[@name=$operationName]/@result.
The OSB XPATH expression editor is throwing the follow error:
Variable "$operationName" used but not declared for expression
Can anyone help with this?

Hi, XPath and XQuery are conceptually different. XPath expression can not have variables while an XQuery expression can have a variable inside the XPath when the expression is bound to a variable.
To work around the issue, instead of using the condition in XPath expression inside replace you should write the XQuery expression of REplace in such a way that it results in what you need.
For ex. if I take the example above:
say the content of $body is as below:
<soap-env:Body>
<aaa>
<bbb>
<ccc>A</ccc>
<key>1</key>
</bbb>
<bbb>
<ccc>B</ccc>
<key>2</key>
</bbb>
</aaa>
</soap-env:Body>
and you wanted to replace values of ccc to X for any bbb elements which have key=1(and you have saved a variable called keyCheck with value '1' earlier in the flow), then you could do the following:
Replace contents of . in body with
<aaa>
for $bbb in $body/aaa/bbb
if ($bbb/key/text() = $keyCheck)
then
<bbb>
<ccc>X</ccc>
<key>{$bbb/key/text()}</key>
</bbb>
else
$bbb
</aaa>

Help Page Error: Using XPath expressions as list indexes and map keys

The help page says for maps to use the XPath expression
/process_data/mapvar[@id='/process_data/@stringvar']
But in reality for things to work you have to omit the quotations.

thanks a lot for your help..
there are total 162 records in the v$open_cursor for that user.
among that the open cursor is only 4 and open-recursive cursor is only 6 for that user.
in my session i am executing only the renaming of the constraints and nothing more.
When i have queried the v$open_cursor for cursor_type='OPEN' for all the users, then i got that it has exceeded the value of open_cursors parameter.
So how can i resolve that....

XPATH-expressions and namespaces

I have a xml-file for testing my xpath expression, like this:
<a>
   <b>
      <c>aaa</c>
         <d>
            <e>111</e>
         </d>
   </b>
   <b>
      <c>bbb</c>
         <d>
            <e>222</e>
         </d>
   </b>
   <b>
      <c>ccc</c>
         <d>
            <e>333</e>
         </d>
   </b>What I want is to get the value of element 'e', based on a check on what the value of element 'c' is. I alway know the value of element 'c'.
I solve this by using this xpath-expression in my xsl-file:
<xsl:variable name="xpathTest" select="//e[../preceding-sibling::c = 'bbb']" />This expression should return '222', and it works!!!
But, when I use the another xml-file with a similar structure, with namespaces, like this:
<body xsi:type="fkpsoap:FKPSOAPOperationResponse">
   <FKPSOAPOperationResponse>
      <fkpsoap_1:fkrdk178_output_data>
         <fkpsoap_1:fkrdk178_list_cust_information>
            <fkpsoap_1:fkrdk178_list_customerinfo>
               <fkpsoap_1:fkrdk178_list_variable_code> aaa </fkpsoap_1:fkrdk178_list_variable_code>
               <fkpsoap_1:fkrdk178_list_value_name>
                  <fkpsoap_1:fkrdk178_list_value_text> 111 </fkpsoap_1:fkrdk178_list_value_text>
            </fkpsoap_1:fkrdk178_list_customerinfo>
            <fkpsoap_1:fkrdk178_list_customerinfo>
               <fkpsoap_1:fkrdk178_list_variable_code> bbb </fkpsoap_1:fkrdk178_list_variable_code>
               <fkpsoap_1:fkrdk178_list_value_name>
                  <fkpsoap_1:fkrdk178_list_value_text> 222 </fkpsoap_1:fkrdk178_list_value_text>
            </fkpsoap_1:fkrdk178_list_customerinfo>
            <fkpsoap_1:fkrdk178_list_customerinfo>
               <fkpsoap_1:fkrdk178_list_variable_code> ccc </fkpsoap_1:fkrdk178_list_variable_code>
               <fkpsoap_1:fkrdk178_list_value_name>
                  <fkpsoap_1:fkrdk178_list_value_text> 333 </fkpsoap_1:fkrdk178_list_value_text>
            </fkpsoap_1:fkrdk178_list_customerinfo>
         </fkpsoap_1:fkrdk178_list_cust_information>
      </fkpsoap_1:fkrdk178_output_data>
   </FKPSOAPOperationResponse>
</body>Then the xpath-expression does not work!
I can easily extract the value of the element similar to the element 'e' in my test-file, but then I will always get the value from the first occurance of 'e', which is '111'.
Can anyone help me with this?

Most APIs which let you create XPath objects allow you to create a namespace context and attach it to the XPath object. Your API most likely does too, whatever it is. Then you would just use the prefixes which the namespace context describes in your XPath expression.
(This namespace context generally maps prefixes to namespace URIs. Remember that the namespace URI is really what the XPath is looking for and the prefix is just a short cut for you to use.)

Can not construct xml from relative xpath expression: //FormVar

In version 7.0, it was possible to access Form Variables with the (valid) XPath Expression "//FormVariable".
In 7.2.2, using this XPath Expression leads to a stalled action, with message: "can not construct xml from relative xpath expression: //FormVar". (see full stack trace below)
What's wrong? How can I fix this?
Use of relative expression is very very useful during the development phase!
Best Regards,
com.adobe.workflow.WorkflowRuntimeException: can not construct xml from relative xpath expression: //FormVar
at com.adobe.workflow.pat.service.PATExecutionContextImpl.createNodesForXPathExpression(PATE xecutionContextImpl.java:854)
at com.adobe.workflow.pat.service.PATExecutionContextImpl.setProcessDataValue(PATExecutionCo ntextImpl.java:707)
at com.adobe.workflow.pat.service.PATExecutionContextImpl.setProcessDataWithExpression(PATEx ecutionContextImpl.java:429)
at com.adobe.workflow.qpac.set_value.SetValueService.execute(SetValueService.java:72)
at com.adobe.workflow.engine.PEUtil.executeAction(PEUtil.java:184)
at com.adobe.workflow.engine.ProcessEngineBMTBean.continueBranchAtAction(ProcessEngineBMTBea n.java:2371)
at com.adobe.workflow.engine.ProcessEngineBMTBean.asyncInvokeProcessCommand(ProcessEngineBMT Bean.java:512)
at sun.reflect.GeneratedMethodAccessor709.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionConta iner.java:683)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:185)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.AbstractTxInterceptorBMT.invokeNext(AbstractTxInterceptorBMT.java:1 44)
at org.jboss.ejb.plugins.TxInterceptorBMT.invoke(TxInterceptorBMT.java:62)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstance Interceptor.java:72)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:120)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor. java:122)
at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:331 )
at org.jboss.ejb.Container.invoke(Container.java:723)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:359)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:83)
at $Proxy285.asyncInvokeProcessCommand(Unknown Source)
at com.adobe.workflow.engine.ProcessCommandControllerBean.onMessage(ProcessCommandController Bean.java:127)
at sun.reflect.GeneratedMethodAccessor641.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.MessageDrivenContainer$ContainerInterceptor.invoke(MessageDrivenContainer.j ava:458)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionI nterceptor.java:185)
at org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor.invoke(MessageDrivenInstanceInterc eptor.java:62)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:315)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:148)
at org.jboss.ejb.plugins.RunAsSecurityInterceptor.invoke(RunAsSecurityInterceptor.java:90)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at org.jboss.ejb.MessageDrivenContainer.internalInvoke(MessageDrivenContainer.java:372)
at org.jboss.ejb.Container.invoke(Container.java:723)
at org.jboss.ejb.plugins.jms.JMSCont

Sorry, i just read my own message in the discussion forum and
discovered all spaces for formating the XML tags where gone.
It should look like this:
[-----xml_type---]
<doc>
__<role>
____actor
____<first>
______john
____</first>
____<last>
______bond
____</last>
__</role>
__<role>
____actor
____<first>
______james
______</first>
____<last>
______smith
____</last>
__</role>
</doc>
semantic:
There are two actors: "john bond" and "james smith"
Querying for "john bond" succeedes which is correct
Querying for "james smith" succeedes which is correct
Querying for "james bond" fails which is correct
Querying for "john smith" succeedes which is an ERROR!
contains(xdata, 'actor INPATH(//role[./first = "john" and ./last
= "smith"])' (= 100 ---> ERROR!)
bye,
feri

How to evaluate dynamic XPath expression in BPEL?

I have an xml file where I keep many settings for my BPEL process. At runtime, I read the file and I want to select values from it based on values in the process payload.
For example, imagine that the process payload is an order:
<order>
<header>
<id/>
<customer_id/>
<team_id/>
</header>
<items>
<item>
<id/>
<sku/>
<price/>
<quantity/>
</item>
</items>
</order>
Now, in my xml settings file, I have a section where I keep a mapping of "team_id" and "assignment_group", so that for each team id, I can select the appropriate group to whom a task should be assigned. The relevant section of the settings file will look something like this:
<assignment_groups>
<group team_id='0923230'>invoice_approvers</group>
<group team_id='3094303'>order_approvers</group>
<group team_id='3434355'>shipping_approvers</group>
</assignment_groups>
So, imagine I get an order input to my process where the team_id is '3094303'. Now I have to lookup the correct assignment group in my settings file.
So, I construct the dynamic XPath expression
/settings/assignment_groups/group[@team_id=3094303]
I know that this would evaluate to "order_approvers". However, even though I have the XPath expression in a BPEL variable, and I have my settings file as a BPEL variable also, I don't know how to execute the XPath expression against the settings BPEL variable to retrieve the correct value.
Any ideas appreciated.
Thanks,
Jack

James:
Thank you for the response. Incidentally, this is the very same document and section that I have been looking at for guidance. Specifically, the section titled "Dynamically indexing by Constructing an XPath at Run Time" on page 12-13.
I tried to do something similar to the example at the top of page 13:
<variable name="iterator" type="xsd:integer"/>
<assign>
<copy>
<from expression="concat('/invoice/line-item[',bpws:getVariableData('iterator'), ']/line-total')"/>
<to variable="xpath"/>
</copy>
<copy>
<from expression="bpws:getVariableData('input', 'payload',bpws:getVariableData('xpath')) + ..."/>
</copy>
</assign>
I am able to achieve the first copy operation to get my dynamic XPath into a BPEL variable and that's fairly straightforward. But I am unable to get the second copy to work. Specifically, I am not sure what to put in the second argument of the bpws:getVariableData function. I have tried many different combinations, but when I try to compile my program, I get the following compilation error:
Error:
[Error ORABPEL-10902]: compilation failed
[Description]: in "C:\code\TrainingWS\SampleGetSettings\bpel\SampleGetSettings.bpel", XML parsing failed because "org.collaxa.thirdparty.jaxen.expr.DefaultFunctionCallExpr".
[Potential fix]: n/a.
Thanks,
Jack

Xpath expression in Left and Right operand for Receiver determination

Hi Experts,
Is it possible to use an Xpath expression in both the Left and Right operand inside the Receiver determination e.g.
(/Message/line/IDNumber = /Message/line/IDNo)
Any help will be appreciated.
Thank you,
Brendon

in standard receiver determination you can only specify value for the right operand.
that is one of the reasons you go for enhanced receiver determination
as mentioned in the sap help
If you are using the condition editor to define receiver determinations or interface determinations, you can only use the expression editor to create an expression for the left operand. You must specify a value for the right operand.

NullPointerException when processing *[*] xpath expression

I'm trying to pull only elements that have an element as a
child, using the *[*] xpath expression. When I use MSXML 3.0,
my results are correct. When I use ORAXSL (NT 9i version
downloaded from OTN), I get a NullPointerException. Please see
example below.
<?xml version="1.0"?>
<TABLES>
     <TABLE1>
          <TABLE1_ROW1>TEXT1</TABLE1_ROW1>
          <TABLE1_ROW2>TEXT2</TABLE1_ROW2>
     </TABLE1>
     <TABLE2>
          <TABLE2_ROW1>TEXT3</TABLE2_ROW1>
     </TABLE2>
     <TABLE3>
          <TABLE3_ROW1>TEXT4</TABLE3_ROW1>
     </TABLE3>
</TABLES>
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
     <xsl:output method="text" version="1.0" encoding="UTF-8"
indent="yes"/>
<xsl:key name="elements" match="*[*]" use="name()"/>
<xsl:template match="/">
<xsl:for-each select="//*[generate-id(.)=generate-id(key
('elements',name())[1])]">
<xsl:for-each select="key('elements',name())">
<xsl:if test="position()=1">
<xsl:text>drop table </xsl:text>
<xsl:value-of select="name()"/>
<xsl:text>;
</xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:for-each>
<xsl:text>
exit</xsl:text>
</xsl:template>
</xsl:stylesheet>
MSXML 3.0 OUTPUT:
drop table TABLES;
drop table TABLE1;
drop table TABLE2;
drop table TABLE3;
exit
ORAXSL OUTPUT:
java.lang.NullPointerException
Error occurred while processing test.xml: null
If I change the *[*] to just * then the XSLT will process.

This is a bug. I've filed Bug 2138361 to get this looked into by
development.
The workaround is to avoid using keys, moving the *[*] into the
outer select expression for the for-each:
<xsl:for-each select="//*[*]">
instead of:
<xsl:for-each select="//*[*][generate-id(.) =
                             generate-id(key('elements',name())
[1])]">

UCCX XPath-expression with -operator does not work

Hi all,
I'd like to read opening hours from an XML file. The UCCX version is 8.5.
The XML looks like this:
<ccdata>
   <dow>
      <dow6>
         <open>
            <from hour="8" minute = "00" />
            <until hour="19" minute ="15" />
         </open>
     </dow6>
</dow>
</ccdata>
I simpified the file for testing, it should contain several open items later for every day of week.
I want to use an XPath expression to check if there's a open item for the current day of week and time.
I started with a simplified expression that should return the node for an hour value of 8:
//ccdata/dow/dow6/open/from[@hour=8 ]/@hour
that's working- it returns "8".
But if I change the expression to return the node for an hour value less then 9:
//ccdata/dow/dow6/open/from[@hour<9]/@hour
it returns nothing. If I enter the expression into a XPath test tool ("XPath Visualizer Tool") it looks ok.
Any ideas? Is that a bug?
Thanks in advance
Jörg

It must be a bug- I tried it on UCCX 7.0(1)SR03 and it's working there.

Using the variable placeholder ? in an XPath expression

I'm trying to using the variable operator (?) in an Oracle prepared statement used in a query where clause. Here is the query:
select xt.APPLICATION_NAME, xt.VERSION, xt.EVENT_TYPE, xt.SENDING_SITE, xt.RECEIVING_SITE, xt.EVENT_ID
      from AUDITED_EVENT_XML_MIN e,
         XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
                '/xae:auditable-event'
                PASSING e.xml_event_content
                COLUMNS
                APPLICATION_NAME VARCHAR2(255) PATH 'xae:application-name',
                VERSION          VARCHAR2(255) PATH 'xae:version',
                EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
                SENDING_SITE     VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.4/HD.2',
                RECEIVING_SITE   VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.6/HD.2',
                EVENT_ID         VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.10') xt
            where existsNode(E.XML_EVENT_CONTENT, '/xae:auditable-event[xae:event-type=?]','xmlns:xae="http://gov/va/med/datasharing/audit/endpoint/audit"') = 1This code works when the ? is replaced with "aValue". I need to use the ? so that my Java client can pass a variable value into the query.
Is this a supportable feature or am I doing something wrong?
I didn't see any examples in the Oracle XML DB Developers Guide where there was a ? in an XPath expression.
I also tried "?" with the same issue...
Here is the version info:
SQL*Plus: Release 11.1.0.6.0 - Production on Mon Sep 10 18:41:55 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing optionsAny assistance would be greatly appreciated.
Thanks in advance...
Edited by: flyeagle5683 on Sep 10, 2012 5:49 PM

select xt.APPLICATION_NAME, xt.VERSION, xt.EVENT_TYPE, xt.SENDING_SITE, xt.RECEIVING_SITE, xt.EVENT_ID
      from AUDITED_EVENT_XML_MIN e,
         XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
                '/xae:auditable-event'
                PASSING e.xml_event_content
                COLUMNS
                APPLICATION_NAME VARCHAR2(255) PATH 'xae:application-name',
                VERSION          VARCHAR2(255) PATH 'xae:version',
                EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
                SENDING_SITE     VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.4/HD.2',
                RECEIVING_SITE   VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.6/HD.2',
                EVENT_ID         VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.10') xt
            where XMLEXISTS(
                       'declarre namespace xae ="http://gov/va/med/datasharing/audit/endpoint/audit"; (: :)
                        $XML/xae:auditable-event[xae:event-type=$VALUE]'
                        passing e.xml_event_content as "XML",
                                  :1 as "VALUE"
            ) or you can do
select xt.APPLICATION_NAME, xt.VERSION, xt.EVENT_TYPE, xt.SENDING_SITE, xt.RECEIVING_SITE, xt.EVENT_ID
      from AUDITED_EVENT_XML_MIN e,
         XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
                '/xae:auditable-event'
                PASSING e.xml_event_content
                COLUMNS
                APPLICATION_NAME VARCHAR2(255) PATH 'xae:application-name',
                VERSION          VARCHAR2(255) PATH 'xae:version',
                EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
                SENDING_SITE     VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.4/HD.2',
                RECEIVING_SITE   VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.6/HD.2',
                EVENT_ID         VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.10') xt
      WHERE EVENT_TYPE = :1Edited by: mdrake on Sep 10, 2012 7:23 PM
Edited by: mdrake on Sep 10, 2012 7:24 PM

Using the variable ? operator in an XPath Expression

I'm trying to using the variable operator (?) in an Oracle prepared statement used in a query where clause. Here is the query:
select xt.APPLICATION_NAME, xt.VERSION, xt.EVENT_TYPE, xt.SENDING_SITE, xt.RECEIVING_SITE, xt.EVENT_ID
      from AUDITED_EVENT_XML_MIN e,
         XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
                '/xae:auditable-event'
                PASSING e.xml_event_content
                COLUMNS
                APPLICATION_NAME VARCHAR2(255) PATH 'xae:application-name',
                VERSION          VARCHAR2(255) PATH 'xae:version',
                EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
                SENDING_SITE     VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.4/HD.2',
                RECEIVING_SITE   VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.6/HD.2',
                EVENT_ID         VARCHAR2(255) PATH 'xae:xml-event-content/*/MSH/MSH.10') xt
            where existsNode(E.XML_EVENT_CONTENT, '/xae:auditable-event[xae:event-type=?]','xmlns:xae="http://gov/va/med/datasharing/audit/endpoint/audit"') = 1This code works when the ? is replaced with "aValue". I need to use the ? so that my Java client can pass a variable value into the query.
Is this a supportable feature or am I doing something wrong?
I didn't see any examples in the Oracle XML DB Developers Guide where there was a ? in an XPath expression.
I also tried "?" with the same issue...
Here is the version info:
SQL*Plus: Release 11.1.0.6.0 - Production on Mon Sep 10 18:41:55 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing optionsAny assistance would be greatly appreciated.
Thanks in advance...

I incorporated this suggestion and it worked very well. Thanks!
Now I have converted my solution to use a structured index. As such, I want to write the where clauses in terms of column names rather than XPath expressions.
I hoped it was as simple as changing the code that generates the XPath expression to generate a SQL expression. After making that change, I'm now getting this error:
Caused by: java.sql.SQLSyntaxErrorException: ORA-00920: invalid relational operator
     at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:91)
     at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
     at oracle.jdbc.driver.T2CConnection.checkError(T2CConnection.java:686)
     at oracle.jdbc.driver.T2CConnection.checkError(T2CConnection.java:617)
     at oracle.jdbc.driver.T2CPreparedStatement.executeForDescribe(T2CPreparedStatement.java:559)
     at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1077)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
     at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3425)
     at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1490)
     at gov.va.med.datasharing.audit.dao.jdbc.runner.MapQueryRunner.run(MapQueryRunner.java:47)
     at gov.va.med.datasharing.audit.web.dao.jdbc.AuditableEventsQueryDAOImpl.getAuditableEventsByDate(AuditableEventsQueryDAOImpl.java:150)It seemed to me that if it worked for the XPath expression that it should also work for the SQL expression.
The static SQL is:
SELECT PK_ID, EVENT_TYPE, OUTCOME, SENDING_SITE, RECEIVING_SITE, CREATED_TIME, EVENT_ID, PATIENT_ID FROM
(SELECT rownum as rn, PK_ID, EVENT_TYPE, OUTCOME, SENDING_SITE, RECEIVING_SITE, CREATED_TIME, EVENT_ID, PATIENT_ID FROM
     (SELECT aet.AUDITABLE_EVENT_XML_PK_ID AS PK_ID, xt.EVENT_TYPE, xt.OUTCOME, xt.SENDING_SITE, xt.RECEIVING_SITE, aet.CREATED_TIME as CREATED_TIME, xt.EVENT_ID, xt.PATIENT_ID
        FROM AUDITABLE_EVENT_XML aet,
          XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
            '/xae:auditable-event'
            PASSING aet.xml_event_content
            COLUMNS
            EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
            SENDING_SITE     VARCHAR2(255) PATH 'xae:sending-site',
            RECEIVING_SITE   VARCHAR2(255) PATH 'xae:receiving-site',
            EVENT_ID         VARCHAR2(255) PATH 'xae:event-id',
            PATIENT_ID           VARCHAR2(255) PATH 'xae:patient-id',
            OUTCOME                VARCHAR2(255) PATH 'xae:outcome') xt
        WHERE aet.CREATED_TIME BETWEEN ? AND ?
             AND ?
      ) ORDER BY CREATED_TIME desc
    ) WHERE rn > ? and rn <= ?So I'm thinking that Oracle must perform strong checking in SQL, not allowing the '=' operator to be substituted. If I run this query in Toad, replacing the ? with the SQL, it runs fine...
Can someone tell me whether or not this is a legal substitution?
The SQL that runs in Toad is:
SELECT PK_ID, EVENT_TYPE, OUTCOME, SENDING_SITE, RECEIVING_SITE, CREATED_TIME, EVENT_ID, PATIENT_ID FROM
(SELECT rownum as rn, PK_ID, EVENT_TYPE, OUTCOME, SENDING_SITE, RECEIVING_SITE, CREATED_TIME, EVENT_ID, PATIENT_ID FROM
     (SELECT aet.AUDITABLE_EVENT_XML_PK_ID AS PK_ID, xt.EVENT_TYPE, xt.OUTCOME, xt.SENDING_SITE, xt.RECEIVING_SITE, aet.CREATED_TIME as CREATED_TIME, xt.EVENT_ID, xt.PATIENT_ID
        FROM AUDITABLE_EVENT_XML aet,
          XMLTable(XMLNAMESPACES('http://gov/va/med/datasharing/audit/endpoint/audit' AS "xae"),
            '/xae:auditable-event'
            PASSING aet.xml_event_content
            COLUMNS
            EVENT_TYPE       VARCHAR2(255) PATH 'xae:event-type',
            SENDING_SITE     VARCHAR2(255) PATH 'xae:sending-site',
            RECEIVING_SITE   VARCHAR2(255) PATH 'xae:receiving-site',
            EVENT_ID         VARCHAR2(255) PATH 'xae:event-id',
            PATIENT_ID         VARCHAR2(255) PATH 'xae:patient-id',
            OUTCOME             VARCHAR2(255) PATH 'xae:outcome') xt
        WHERE aet.CREATED_TIME BETWEEN TO_DATE ('9/19/2011 12:00:01 AM','MM/DD/YYYY HH:MI:SS PM')
                                     AND TO_DATE ('12/20/2012 12:00:00 AM','MM/DD/YYYY HH:MI:SS PM')
            AND (OUTCOME=0 or OUTCOME=1)
      ) ORDER BY CREATED_TIME desc
    ) WHERE rn > 0 and rn <= 5;Any assistance will be appreciated,
Thanks in advance.

How can I convert the variable expression stored as string back to variable expression

How can I convert the variable expression stored as string back to variable expression?
I am storing the expression enterd in the TSExpresssionEditControl as simple string and want to convert back to expression since I want to get the data type of that expression.

pritam,
I'm not sure what you're trying to do exactly. If you are trying to get the value of a variable and you only have the name of value in a string, then you can use Evaluate() to get its value. If you want the data type, my advise is to use the GetPropertyObject() API method and just pass in the loop up string. Then you'll have a handle to the data object and then proceed from there.
Regards,
Song D
Application Engineer
National Instrument
Regards,
Song Du
Systems Software
National Instruments R&D

Using a xpath expression stored in a variable

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