Dear Peter,
Thank you for your answer.
I have XML stored in my database.
XML looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<orders>
<singleOrder no="1" date="2015-01-22">
<customer id="1" />
<products>
<product>
<productId>1</productId>
<orderId>1</orderId>
<quantity>3</quantity>
</product>
</products>
</singleOrder>
<singleOrder no="4" date="2015-02-27">
<customer id="1" />
<products>
<product>
<productId>3</productId>
<orderId>4</orderId>
<quantity>2</quantity>
</product>
<product>
<productId>4</productId>
<orderId>4</orderId>
<quantity>4</quantity>
</product>
</products>
</singleOrder>
<singleOrder no="2" date="2015-01-25">
<customer id="3" />
<products>
<product>
<productId>4</productId>
<orderId>2</orderId>
<quantity>5</quantity>
</product>
</products>
</singleOrder>
<singleOrder no="3" date="2015-02-01">
<customer id="4" />
<products>
<product>
<productId>1</productId>
<orderId>3</orderId>
<quantity>8</quantity>
</product>
<product>
<productId>3</productId>
<orderId>3</orderId>
<quantity>20</quantity>
</product>
</products>
</singleOrder>
</orders>
I want to get from it for all product: customer/@id, singleOrder/@no,
productId, quantity, singleOrder/@date, so the output will look like this:
customerIdorderIdproductIdquantitydate11132015-01-2214322015-02-271444
2015-02-2732452015-01-2543182015-02-01433202015-02-01
Do you know how to do that?
Thank you,
Grzegorz
2015-10-29 13:51 GMT+01:00 Peter Ondruška <[email protected]>:
> Dear Greg,
>
> unless anything changed with last Derby release XML support in Derby is
> limited to storing XML--the last time I checked basically there is only an
> XML data type, no query, no indexes.
>
> On 29 October 2015 at 09:11, Grzegorz Zuber <[email protected]>
> wrote:
>
>> Hi,
>>
>> I was doing wide research how can I do XQuery or XSLT query using Derby.
>>
>> I'm doing query like this:
>>
>>
>>
>> SELECT
>> XMLSERIALIZE(
>> XMLQUERY('<?xml version="1.0" encoding="UTF-8"?>
>> <xsl:stylesheet version="1.0"
>> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; xmlns:fo="
>> http://www.w3.org/1999/XSL/Format";>
>>
>> <xsl:template match="catalog">
>> <html lang="en">
>> <head>
>> <body>
>>
>> <table>
>> <thead>
>> <tr>
>> <th>Title</th>
>> </tr>
>> </thead>
>> <tbody>
>> <xsl:for-each select="book">
>> <tr>
>> <td>
>> <xsl:value-of select="title" />
>> </td>
>> </tr>
>> </xsl:for-each>
>> </tbody>
>> </table>
>> </body>
>> </html>
>> </xsl:template>
>> </xsl:stylesheet>' PASSING BY REF xml_col EMPTY ON
>> EMPTY) AS VARCHAR(10)
>> )AS ProductId
>> FROM xml_orders
>>
>>
>>
>>
>> But I'm getting an exception:
>>
>> java.sql.SQLException: Encountered error while evaluating XML query
>> expression for xmlquery operator:
>> com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception:
>> Prefix must resolve to a namespace: xsl
>> at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
>> Source)
>> at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
>> Source)
>> at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
>> at
>> org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown
>> Source)
>> at
>> org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
>> Source)
>> at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown
>> Source)
>> at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown
>> Source)
>> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
>> at org.apache.derby.impl.jdbc.EmbedStatement.executeQuery(Unknown Source)
>> at com.sqlxd.derby.DBQuery.executeDerbyQuery(DBQuery.java:295)
>> at com.SQLxDClient.QueryExecutor.executeQuery(QueryExecutor.java:47)
>> at com.SQLxDClient.Window$3.serveExecuteToGrid(Window.java:204)
>> at com.SQLxDClient.Window$3.mouseClicked(Window.java:192)
>> at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
>> at java.awt.Component.processMouseEvent(Component.java:6519)
>> at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
>> at java.awt.Component.processEvent(Component.java:6281)
>> at java.awt.Container.processEvent(Container.java:2229)
>> at java.awt.Component.dispatchEventImpl(Component.java:4872)
>> at java.awt.Container.dispatchEventImpl(Container.java:2287)
>> at java.awt.Component.dispatchEvent(Component.java:4698)
>> at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
>> at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4501)
>> at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
>> at java.awt.Container.dispatchEventImpl(Container.java:2273)
>> at java.awt.Window.dispatchEventImpl(Window.java:2719)
>> at java.awt.Component.dispatchEvent(Component.java:4698)
>> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
>> at java.awt.EventQueue.access$300(EventQueue.java:103)
>> at java.awt.EventQueue$3.run(EventQueue.java:706)
>> at java.awt.EventQueue$3.run(EventQueue.java:704)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at
>> java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
>> at
>> java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
>> at java.awt.EventQueue$4.run(EventQueue.java:720)
>> at java.awt.EventQueue$4.run(EventQueue.java:718)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at
>> java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
>> at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
>> at
>> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
>> at
>> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
>> at
>> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
>> at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
>> Caused by: ERROR 10000: Encountered error while evaluating XML query
>> expression for xmlquery operator:
>> com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception:
>> Prefix must resolve to a namespace: xsl
>> at org.apache.derby.iapi.error.StandardException.newException(Unknown
>> Source)
>> at
>> org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown
>> Source)
>> ... 45 more
>> Caused by: javax.xml.xpath.XPathExpressionException:
>> com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception:
>> Prefix must resolve to a namespace: xsl
>> at
>> com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:400)
>> at org.apache.derby.iapi.types.SqlXmlUtil.compileXQExpr(Unknown Source)
>> at
>> org.apache.derby.exe.ac185e801cx0150xb293xf5c3x000006bfe7b80.postConstructor(Unknown
>> Source)
>> at
>> org.apache.derby.impl.services.reflect.LoadedGeneratedClass.newInstance(Unknown
>> Source)
>> at org.apache.derby.impl.sql.GenericActivationHolder.<init>(Unknown
>> Source)
>> at
>> org.apache.derby.impl.sql.GenericPreparedStatement.getActivation(Unknown
>> Source)
>> ... 38 more
>> Caused by:
>> com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception:
>> Prefix must resolve to a namespace: xsl
>> at
>> com.sun.org.apache.xpath.internal.compiler.XPathParser.errorForDOM3(XPathParser.java:657)
>> at
>> com.sun.org.apache.xpath.internal.compiler.Lexer.mapNSTokens(Lexer.java:642)
>> at
>> com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:219)
>> at
>> com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:100)
>> at
>> com.sun.org.apache.xpath.internal.compiler.XPathParser.initXPath(XPathParser.java:114)
>> at com.sun.org.apache.xpath.internal.XPath.<init>(XPath.java:180)
>> at com.sun.org.apache.xpath.internal.XPath.<init>(XPath.java:268)
>> at
>> com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:392)
>> ... 43 more
>>
>>
>> How can I avoid that?
>>
>>
>>
>> Thank you,
>> Greg
>>
>
>
>
> --
> Peter Ondruška
>
