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XML Oracle:从多个重复的子节点中提取特定属性

sql

我很难理解我看到的其他问题,因为它们有些不同。

我从Web服务vi UTL_HTTP获取XML作为响应。XML具有重复的子节点,我只想提取1个特定值。

响应XML:

<Customer>
    <Loyalty>
       <Client>
          <Identifications>
              <Identification>
                   <Form>Form1</Form>
                   <value>1234</value>
              </Identification>
              <Identification>
                   <Form>Form2</Form>
                   <value>4442</value>
              </Identification>
              <Identification>
                   <Form>Form3</Form>
                   <value>9995</value>
              </Identification>
           </Identifications>
       </Client>
    </Loyalty>
 </Customer>

我只需要<value>在node <Form>=“ Form3”的位置提取节点。

因此,在我的代码中,我收到了另一个函数的响应

v_ds_xml_response XMLTYPE;
-- Here would lie the rest of the code (omitted) preparing the XML and next calling the function with    it:

V_DS_XML_RESPONSE := FUNCTION_CALL_WEBSERVICE(
      P_URL => V_DS_URL, --endpoint
      P_DS_XML => V_DS_XML, --the request XML
      P_ERROR => P_ERROR);

这样,我创建了一个LOOP来存储值。我尝试使用WHERE甚至创建类型(下面的V_IDENTIFICATION是该类型),但是它没有返回任何内容(空)。

for r IN (
SELECT         
 ExtractValue(Value(p),'/Customer/Loyalty/Client/Identifications/Identification/*[local-name()="Form"]/text()') as form, 
     ExtractValue(Value(p),'/Customer/Loyalty/Client/Identifications/Identification/*[local-name()="value"]/text()') as value
   FROM   TABLE(XMLSequence(Extract(V_DS_XML_RESPONSE,'//*[local-name()="Customer"]'))) p

LOOP
V_IDENTIFICATION.FORM   := r.form;
V_IDENTIFICATION.VALUE  := r.value;
END LOOP;

SELECT 
       V_IDENTIFICATION.VALUE
INTO   
       P_LOYALTY_VALUE
FROM   dual
WHERE  V_IDENTIFICATION.TIPO = 'Form3';

注意,P_LOYALTY_VALUE是我的过程中的OUT参数


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2021-07-01

共1个答案

admin

我设法找到了一个非常简单的解决方案,只是添加了[text()=“ Form3”] /…/“来声明Xpath,如下所示

SELECT         
ExtractValue(Value(p),'/Customer/Loyalty/Client/Identifications/Identification/*[local-name()="Form"][text()="Form3"]/text()') as form, 
 ExtractValue(Value(p),'/Customer/Loyalty/Client/Identifications/Identification/Form[text()="Form3"]/.../*[local-name()="value"]/text()') as value

还提取值,然后将它们直接发送到过程的OUT参数中:

P_FORM := r.form;
P_LOYALTY_VALUE := r.value;
2021-07-01