XML Oracle：从多个重复子节点中提取特定属性

我无法理解其他我看到的问题，因为它们有点不同。XML Oracle：从多个重复子节点中提取特定属性

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>

我需要提取的节点<value>仅其中节点<Form> = “Form3”。

所以，我的代码中，我收到来自另一个功能

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);

随着该响应，我创建了一个循环来存储值。我试过使用WHERE甚至创建一个类型（下面的V_IDENTIFICATION是类型），但它没有返回任何东西（null）。

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是从我的程序

来源

2016-01-21 mrbTT

AAAND我设法找到了解决方案，这是很简单的，只是添加了[文本（）= “Form3”] /.../”到谓词中的XPath如

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

还提取只需将它们直接发送到过程的OUT参数中即可：

P_FORM := r.form; 
P_LOYALTY_VALUE := r.value;

来源

2016-01-21 14:03:11 mrbTT

的OUT参数与此SQL你应该得到所需的值：

with data as 
(select '<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>' as xmlval 
    from dual b) 
(SELECT t.val 
    FROM data d, 
     xmltable('/Customer/Loyalty/Client/Identifications/Identification' 
        PASSING xmltype(d.xmlval) COLUMNS 
        form VARCHAR2(254) PATH './Form', 
        val VARCHAR2(254) PATH './value') t 
    where t.form = 'Form3');

来源

2016-01-21 13:57:27

当您不知道确切的路径时。

select * from 
xmltable('for $i in $doc//*/Form 
where $i = "Form2" 
return $i/../value' 
passing 
xmltype('<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>') as "doc")

来源

2016-01-21 14:12:10

要提取您寻找您可以使用下面的XPath表达式的值：

/Customer/Loyalty/Client/Identifications/Identification/Form[text()='Form3']/../value

Test it here

然后你可以使用XMLTABLE函数来得到结果

SELECT my_value 
FROM xmltable(
     '/Customer/Loyalty/Client/Identifications/Identification/Form[text()=''Form3'']/../value' 
     PASSING xmltype(
'<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>') 
     COLUMNS 
      my_value VARCHAR2(4000) path '/value' 
    )

来源

2016-01-21 15:02:52

XML Oracle：从多个重复子节点中提取特定属性

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