Question

我在Oracle数据库的表中有一个XML列，出于某种原因，我意识到XML标记最后都被破坏了。

<XMLBegin><linesandlinesofXML>blahblahblah</linesandlinesofXML>
<Framework.DesktopContent.ImageLocation ObjectName="PaneContentImageSelected" locati...

我是否可以知道是否可以在XML列中搜索“...”，其中“...”不在标签中？我想清除破碎的XML，而不必清除整个表。

提前致谢！

Answer 1

如果找到它和无效的XML，你可以这样做：

SQL> desc myxml
 Name                                      Null?    Type
 ----------------------------------------- -------- --------
 XML                                                CLOB

SQL> create or replace function is_valid(xml clob) return varchar2
  2  is
  3    e_invalid exception;
  4    pragma exception_init(e_invalid, -31011);
  5    v_xml xmltype;
  6  begin
  7    v_xml := xmltype(xml);
  8    return 'Y';
  9  exception
 10    when e_invalid
 11    then
 12      return 'N';
 13  end;
 14  /

Function created.

SQL> select * from myxml;

XML
--------------------------------------------------------------------------------
<XMLBegin><linesandlinesofXML>blahblahblah</linesandlinesofXML>
<Framework.DesktopContent.ImageLocation ObjectName="PaneContentImageSelected" lo
cati..

<XMLBegin><linesandlinesofXML>blahblahblah</linesandlinesofXML></XMLBegin>

SQL> select * from myxml where is_valid(xml) = 'N';

XML
--------------------------------------------------------------------------------
<XMLBegin><linesandlinesofXML>blahblahblah</linesandlinesofXML>
<Framework.DesktopContent.ImageLocation ObjectName="PaneContentImageSelected" lo
cati..

Oracle表中的XML标记已损坏

1 个答案: