Extracting Values from XML-Document in pl/sql

Hello!
I need to extract the content of the following extract:
<ns1:OXERPGetArticlesResponse xmlns:ns1="OXERPService">
<ns1:OXERPGetArticlesResult>
<ns1:OXERPType>
<ns1:aResult>
<ns1:ArrayOfString>
<ns1:string>OXID</ns1:string>
<ns1:string>531f91d4ab8bfb24c4d04e473d246d0b</ns1:string>
</ns1:ArrayOfString>
<ns1:ArrayOfString>
<ns1:string>OXARTNUM</ns1:string>
<ns1:string>0601-85-069</ns1:string>
</ns1:ArrayOfString>
<ns1:ArrayOfString>
<ns1:string>OXPRICE</ns1:string>
<ns1:string>100.5</ns1:string>
</ns1:ArrayOfString>
</ns1:aResult>
<ns1:blResult>true</ns1:blResult>
<ns1:sMessage/>
</ns1:OXERPType>
<ns1:OXERPType>
<ns1:aResult>
<ns1:ArrayOfString>
<ns1:string>OXID</ns1:string>
<ns1:string>531a8af7d9a9a5bb53b65a2b9a5356e5</ns1:string>
</ns1:ArrayOfString>
<ns1:ArrayOfString>
<ns1:string>OXARTNUM</ns1:string>
<ns1:string>0601-85-069-1</ns1:string>
</ns1:ArrayOfString>
<ns1:ArrayOfString>
<ns1:string>OXPRICE</ns1:string>
<ns1:string>89.9</ns1:string>
</ns1:ArrayOfString>
</ns1:aResult>
<ns1:blResult>true</ns1:blResult>
<ns1:sMessage/>
</ns1:OXERPType>
</ns1:OXERPGetArticlesResult>
</ns1:OXERPGetArticlesResponse>
The output should be:
OXID OXARTNUM OXPRICE
531f91d4ab8bfb24c4d04e473d246d0b 0601-85-069 100.5
531a8af7d9a9a5bb53b65a2b9a5356e5 0601-85-069-1 89.9
The count of rows and columns is variable.
I want to do this by using xmltype.extract but I found no way to create a loop over the content of the xml document.
Hopefully someone can help me!
Regards
Herbert

OK, then you should be able to use something like :
SQL> var xmldoc clob;
SQL> begin
2   :xmldoc := '<ns1:OXERPGetArticlesResponse xmlns:ns1="OXERPService">
3 <ns1:OXERPGetArticlesResult>
4 <ns1:OXERPType>
5 <ns1:aResult>
6 <ns1:ArrayOfString>
7 <ns1:string>OXID</ns1:string>
8 <ns1:string>531f91d4ab8bfb24c4d04e473d246d0b</ns1:string>
9 </ns1:ArrayOfString>
10 <ns1:ArrayOfString>
11 <ns1:string>OXARTNUM</ns1:string>
12 <ns1:string>0601-85-069</ns1:string>
13 </ns1:ArrayOfString>
14 <ns1:ArrayOfString>
15 <ns1:string>OXPRICE</ns1:string>
16 <ns1:string>100.5</ns1:string>
17 </ns1:ArrayOfString>
18 </ns1:aResult>
19 <ns1:blResult>true</ns1:blResult>
20 <ns1:sMessage/>
21 </ns1:OXERPType>
22 <ns1:OXERPType>
23 <ns1:aResult>
24 <ns1:ArrayOfString>
25 <ns1:string>OXID</ns1:string>
26 <ns1:string>531a8af7d9a9a5bb53b65a2b9a5356e5</ns1:string>
27 </ns1:ArrayOfString>
28 <ns1:ArrayOfString>
29 <ns1:string>OXARTNUM</ns1:string>
30 <ns1:string>0601-85-069-1</ns1:string>
31 </ns1:ArrayOfString>
32 <ns1:ArrayOfString>
33 <ns1:string>OXPRICE</ns1:string>
34 <ns1:string>89.9</ns1:string>
35 </ns1:ArrayOfString>
36 </ns1:aResult>
37 <ns1:blResult>true</ns1:blResult>
38 <ns1:sMessage/>
39 </ns1:OXERPType>
40 </ns1:OXERPGetArticlesResult>
41 </ns1:OXERPGetArticlesResponse>';
42 end;
43 /
Procédure PL/SQL terminée avec succès.
SQL> SELECT x1.rec_id
2       , x2.col_name
3       , x2.col_value
4 FROM XMLTable(
5        XMLNamespaces('OXERPService' as "ns1"),
6        '/ns1:OXERPGetArticlesResponse/ns1:OXERPGetArticlesResult/ns1:OXERPType/ns1:aResult'
7        passing xmltype(:xmldoc)
8        columns rec_id for ordinality
9              , rec_xml xmltype path 'ns1:ArrayOfString'
10       ) x1,
11       XMLTable(
12        XMLNamespaces('OXERPService' as "ns1"),'/ns1:ArrayOfString'
13        passing x1.rec_xml
14        columns col_name varchar2(30) path 'ns1:string[1]'
15              , col_value varchar2(30) path 'ns1:string[2]'
16       ) x2
17 ;
    REC_ID COL_NAME                       COL_VALUE
         1 OXID                           531f91d4ab8bfb24c4d04e473d246d
         1 OXARTNUM                       0601-85-069
         1 OXPRICE                        100.5
         2 OXID                           531a8af7d9a9a5bb53b65a2b9a5356
         2 OXARTNUM                       0601-85-069-1
         2 OXPRICE                        89.9
6 ligne(s) sélectionnée(s).You mentioned that the number of column(s) is not known in advance. That's gonna be a problem to present the data column-wise.
Version 11g has the PIVOT feature, but still you have to know how many columns there will be in the result set.
How are you going to use the data after extraction?
Maybe we could advise some other techniques more relevant for your requirement.

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I am using the following client:
SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jan 31 11:44:59 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
////////////////////////////////// XML Schema ///////////////////////
begin
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targetNamespace="http://www.oradev.com/chipsxml.xsd"
xmlns:samp="http://www.oradev.com/chipsxml.xsd"
version="1.0">
<element name="Field1">
<complexType>
<sequence>
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          <complexType>
          <sequence>
          <element name = "U01" type = "string"/>
          <element name = "U02" type = "string"/>
          <element name = "U03" type = "string"/>
          <element name = "U03a" type = "string"/>
          <element name = "U03b" type = "string"/>
          <element name = "U03c" type = "string"/>
          <element name = "U04" type = "string"/>
          <element name = "U05" type = "string"/>
          </sequence>
          </complexType>
     </element>
</sequence>
</complexType>
</element>
</schema>',
TRUE, TRUE, FALSE, FALSE);
end;
////////////////////////// Table which has multiple Column //////////////////////////
CREATE TABLE chipsxmltable1 (
id number, XMLDATA XmlType)
XMLTYPE XMLDATA STORE AS OBJECT RELATIONAL
XMLSCHEMA "http://www.oradev.com/chipsxml.xsd"
ELEMENT "Field1";
///////////////////////////////// Insert Query in chipsxmltable //////////////////////////
INSERT INTO chipsxmltable VALUES(
xmltype.createxml('<?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd" >
<UTI>
<U01>No</U01>
<U02>Y</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>'));
To show the data as a field with structure:
1. Query:
Select * from chipsxmltable1;
Output:
ID XMLDATA
1 <?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd">
<UTI>
<U01>No</U01>
<U02>No</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>
2. Query: (Both the query displays the same Output)
     SELECT X.xmldata.getClobVal() "XMLDATA" FROM chipsxmltable1 X;
     select extract(XMLDATA, '/Field1').getstringval() "XMLDATA" from chipsxmltable1 x;
Output:
XMLDATA
<?xml version="1.0"?>
<samp:Field1 xmlns:samp="http://www.oradev.com/chipsxml.xsd">
<UTI>
<U01>No</U01>
<U02>No</U02>
<U03>Y</U03>
<U03a>Y</U03a>
<U03b>Y</U03b>
<U03c>Y</U03c>
<U04>Y</U04>
<U05>Y</U05>
</UTI>
</samp:Field1>
To show the data as a single string without structure using "getstringval()":
3. Query
     select extract(XMLDATA, '//text()').getstringval() "CHIPS - XML" from chipsxmltable1 x;
OUtput:
CHIPS - XML
NoNoYYYYYY
To show the data as a single string without structure using "getclobval()":
4.Query
     select extract(XMLDATA, '//text()').getClobVal() "CHIPS - XML" from chipsxmltable1 x;
Output:
CHIPS - XML
NoNoYYYYYY
To show the data in a particular tag with/Without structure (Which is not working) using "EXTRACT" function:
6.Query:
     select extract(XMLDATA, '/Field1/text()').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI/U01').getstringval() "XMLDATA" from chipsxmltable1 x;
     select extract(XMLDATA, '/Field1/UTI/U01/text()').getstringval() "XMLDATA" from chipsxmltable1 x;
Output:
CHIPS - XML
The above queries are not fetching the value.
To show the data in a particular tag with/Without structure (Which is not working) using "EXTRACTVALUE" function:
7. Query:
     select extractValue(XMLDATA, '/Field1/UTI') "XMLDATA" from chipsxmltable1 x;
     select extractValue(XMLDATA, '/Field1/UTI/U01') "XMLDATA" from chipsxmltable1 x;
Output:
X
The above queries are not fetching the value.
My question is:
How to fetch values from xml tag when the value are inserted through xml schema?
Apologies if the description is not clear. Kindly let me know if further details are needed. Many thanks for your help.
Very best regards,
Godwin Jebakumar C.V.

Hi,
You need to declare the namespace of each element used in the XPath expression, like this :
SQL> select extractvalue( XMLDATA
2                     , '/samp:Field1/UTI/U01'
3                     , 'xmlns:samp="http://www.oradev.com/chipsxml.xsd"' ) "XMLDATA"
4 from chipsxmltable1 x
5 ;
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SQL> select extract( XMLDATA
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http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions051.htm#i1006712
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions052.htm#SQLRF06173
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http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/pseudocolumns010.htm#SQLRF00256
Regards.

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               </price>
          </item2>
          <item3>
               <quantity>
                    300
               </quantity>
               <price>
                    10
               </price>
          </item3>
     </item>
</xml>
then i have to fcath those quantity and price and set in to table...
How to do taht in webdynpro and does any one have parser code for retriving multiple values...

Hi,
1) You need to use JDOM parser.
2) The code for parsing XML using JDOM parser is readily available if you search on google.
3) You will have to check the attribute during every parsing and then if attribute is quantity you can fetch the corresponding tags.
4) Something similar to this:
org.jdom.Document document = parser.build(file);
                org.jdom.Element rootElement = document.getRootElement();
                org.jdom.Element childElement = rootElement.getChild("file");
                Element xmlElement = childElement.getChild("item");
                if (xmlElement != null) {
                    List itemElementsList = xmlElement.getChildren("item1");
                    if (itemElementsList != null) {
                        Iterator iterator3 = itemElementsList.iterator();
                        while (iterator3.hasNext()) {
                            //For each group get quantity
                            Element itemElement = (Element) iterator3.next();
                            List quantityElementsList =
                                    itemElement.getChildren("quantity");
                            if (quantityElementsList != null) {
                                Iterator iterator2 =
                                        quantityElementsList.iterator();
                                while (iterator2.hasNext()) {
// Your code
You might need to make some changes as per your rquirement. Just use this sample to understand how you need to parse the xml
Hope it helps.
Regards.
Rajat
Edited by: Rajat Jain on Jan 22, 2009 9:51 AM

Extract values from a long text

Hi, I need help in extracting value from a long text
Sample data:
A_BOARD_MEETING_600
I need to extract MEETING from the text.
I tried to use CHARINDEX and SUBSTRING but it's not returning the text I wanted. I hope you can help me.
select SUBSTRING(ID, CHARINDEX('_', ID,1+CHARINDEX('_', ID))+1, CHARINDEX('_', ID, 1+CHARINDEX('_', ID, 1+CHARINDEX('_', ID,1)))-1 ) from table
Using the query above it's returning MEETING_600.

Hi, thanks! But would like to ask how can this be converted where it can get the column ID in a table, I'm still learning SQL.
Select Parsename(Replace(YOURCOLUMNNAME,'_','.'),2)From your tablename

Extracting Values from XML-Document in pl/sql

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