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如何使用Oracle SQL查詢選擇XML中的特定節點名稱及其值?

[英]How to select a particular Node name and its values in XML using Oracle SQL query?

我有一個名為SOAP_MONITORING的表,其中有RESPONSE_XML列,它是CLOB數據類型。 在此列中,存儲了較大的xml字符串。 我想從此xml字符串中獲取節點名稱和節點值。 這是我的xml:

<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><ns:placeShopOrderResponse xmlns:ns="http://service.soap.CDRator.com">
<ns:return xmlns:ax2133="http://signup.data.soap.CDRator.com/xsd" xmlns:ax2134="http://core.signup.data.soap.CDRator.com/xsd" xmlns:ax2127="http://data.soap.CDRator.com/xsd" xmlns:ax2129="http://webshop.data.soap.CDRator.com/xsd" xmlns:ax2130="http://core.data.soap.CDRator.com/xsd" xmlns:ax2140="http://core.result.service.soap.CDRator.com/xsd" xmlns:ax2139="http://result.service.soap.CDRator.com/xsd" xmlns:ax2147="http://webshop.result.service.soap.CDRator.com/xsd" xmlns:ax2148="http://mandate.result.service.soap.CDRator.com/xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ax2147:PlaceShopOrderResultDTO">
<ax2130:id xsi:nil="true" /><ax2140:description>SOAP_GLOBAL_SUCCESS</ax2140:description>
<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>201501070917439804</ax2130:id>
<ax2130:id>201501070917439804</ax2130:id>
</ns:return></ns:placeShopOrderResponse>
</soapenv:Body>
</soapenv:Envelope>

我想查詢此列以獲得SUBSCRIPTION_ID ,即201501070917439804 我嘗試了上面的查詢

SELECT extractvalue(RESPONSE_XML, '/*/ax2130/*/id/@value')
FROM SOAP_MONITORING where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder'

但收到一個錯誤

ORA-00932: inconsistent datatypes: expected - got -
00932. 00000 -  "inconsistent datatypes: expected %s got %s"

為了執行此類查詢以從xml獲取節點值,我非常新。

您可以將CLOB轉換為XMLType(假設它是有效的),只需執行以下操作:

extractvalue(XMLType(RESPONSE_XML), ...

不知道為什么要在其中存儲XML的列類型不是XMLType,但這並不完全相關。

然后,您可以將名稱空間提供給extractvalue()

SELECT extractvalue(XMLType(RESPONSE_XML),
  '//ax2130:id/text()',
  'xmlns:ax2130="http://core.data.soap.CDRator.com/xsd"')
FROM SOAP_MONITORING
where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder';

..但您有多個ID,因此得到: ORA-19025: EXTRACTVALUE returns value of only one node

如文檔中所述 ,不建議使用extractvalue

您可以改用XQuery ,特別是XMLTable。

假設只需要將ax2130:id值嵌套在ax2147:subscription ,則可以使用以下XQuery:

SELECT xt.id
FROM SOAP_MONITORING sm
CROSS JOIN XMLTable(XMLNAMESPACES (
      'http://schemas.xmlsoap.org/soap/envelope/' AS "soapenv",
      'http://service.soap.CDRator.com' as "ns",
      'http://core.data.soap.CDRator.com/xsd' as "ax2130",
      'http://webshop.result.service.soap.CDRator.com/xsd' as "ax2147"
    ),
    'for $i in /soapenv:Envelope/soapenv:Body/ns:placeShopOrderResponse/ns:return/ax2147:subscriptions
      return $i/ax2130:id'
    passing XMLType(sm.RESPONSE_XML)
    columns "ID" number path '/') xt
where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder';

                   ID
---------------------
   201501070917439804 
   201501070917439804 

 2 rows selected 

或者,如果您想在任何地方都需要ax:2130節點,包括空白節點,則可以使用:

SELECT xt.id
FROM SOAP_MONITORING sm
CROSS JOIN XMLTable(XMLNAMESPACES (
      'http://core.data.soap.CDRator.com/xsd' as "ax2130"
    ),
    'for $i in //ax2130:id return $i'
    passing XMLType(sm.RESPONSE_XML)
    columns "ID" number path '/') xt
where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder';

                   ID
---------------------

   201501070917439804 
   201501070917439804 

 3 rows selected 

僅需要在XMLNamespaces子句中指定XQuery中引用的名稱空間。

如果需要,您可以基於所選的ID聯接到另一個表:

SELECT xt.id
FROM SOAP_MONITORING sm
CROSS JOIN XMLTable(XMLNAMESPACES (
    ...) xt
JOIN someothertable sot on sot.id = xt.id
where sm.WEB_SERVICE_NAME='RatorWebShopService'
and sm.WEB_METHOD_NAME='placeShopOrder';

做:

"SELECT extractvalue(XMLTYPE(RESPONSE_XML), '/*/ax2130/*/id/@value')
     FROM SOAP_MONITORING where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder'"

代替:

SELECT extractvalue(RESPONSE_XML, '/*/ax2130/*/id/@value')
    FROM SOAP_MONITORING where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder'

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