如何从Oracle XMLTYPE中提取叶节点

我只想从Oracle10g中的XMLTYPE对象中提取叶节点

SELECT
    t.getStringVal() AS text
FROM
    TABLE( XMLSequence( 
        XMLTYPE(
            '<xml>
                <node>
                    <one>text</one>
                </node>
                <node>
                    <two>text</two>
                </node>
                <node>
                    <three>text</three>
                </node>
            </xml>'
        ).extract( '//*' ) 
    ) ) t

我错过了什么？

不管怎样，我找到了：

WHERE
    t.existsNode( '/*//*' ) = 0

---

您可以尝试以下PL/SQL：

DECLARE
  x XMLType := XMLType(
            '<?xml version="1.0" ?>
            <xml>
                <node>
                    <one>text</one>
                </node>
                <node>
                    <two>text</two>
                </node
                <node>
                    <three>text</three>
                </node>
            </xml>');
BEGIN
  FOR r IN (
    SELECT ExtractValue(Value(p),'/XML/node/one/text()') as one_x
          ,ExtractValue(Value(p),'/XML/node/two/text()') as TWO_x
          ,ExtractValue(Value(p),'/XML/node/three/text()') as three
    FROM   TABLE(XMLSequence(Extract(x,'/XML/node/'))) p
    ) LOOP
    /* do whatever you want with r.one_x, r.TWO_x, r.three_x */
  END LOOP;
END;

XPath/*[not*]将获取级别1或更高级别上没有任何子元素的任何元素：

问题1：

:

---

如果希望能够包含根元素，请使用XPath/*|/*[非*]

+1谢谢这帮了我的忙：-

WHERE
    t.existsNode( '/*//*' ) = 0

DECLARE
  x XMLType := XMLType(
            '<?xml version="1.0" ?>
            <xml>
                <node>
                    <one>text</one>
                </node>
                <node>
                    <two>text</two>
                </node
                <node>
                    <three>text</three>
                </node>
            </xml>');
BEGIN
  FOR r IN (
    SELECT ExtractValue(Value(p),'/XML/node/one/text()') as one_x
          ,ExtractValue(Value(p),'/XML/node/two/text()') as TWO_x
          ,ExtractValue(Value(p),'/XML/node/three/text()') as three
    FROM   TABLE(XMLSequence(Extract(x,'/XML/node/'))) p
    ) LOOP
    /* do whatever you want with r.one_x, r.TWO_x, r.three_x */
  END LOOP;
END;

SELECT t.getStringVal()
FROM   TABLE(
         XMLSEQUENCE(
           XMLTYPE(
             '<xml>
             <node><one>text</one></node>
             <node><two>text</two></node>
             <node><three>text</three></node>
             </xml>'
           ).extract( '//*[not(*)]' )
         )
       ) t

|    T.GETSTRINGVAL() |
|---------------------|
|     <one>text</one> |
|     <two>text</two> |
| <three>text</three> |