DeleteXml() causing xml data format error in database

Question

Hi, guys,
  I'm using the oracle  xml db 11g in my website application. Last week I found that using the deletexml() to delete a node in the xml may cause a terrible problem that the rest data in the database had wrong xml format. I wonder is it a bug when using binary xml storage.
  My xml data is describe below,
<root>
     <nodes>
          <node id="1">
               <name>John</name>
               <age>16</age>
               <hobby>football</hobby>
          </node>
          <node id="2">
               <name>Alex</name>
               <age>22</age>
               <hobby>table tenisl</hobby>
         </node>
     <nodes>
</root>
  I using deletexml() to delete just a node once time,
"update projects set object_value=deletexml(object_value, '/root/nodes/node[@id="1"]')"
Usually it successes and the rest data is as excepted, but sometime, I find that after deleting a node, any query in the database except "select * from projects" gets null. And the rest data has wrong format like below,
<root>
     <nodes>
          <node id="1">
               <name>John</name>
               <age>/hobby>
          </node>
          <node id="2">
               <name>Alex</name>
               <age>22</age>
               <hobby>table tenisl</hobby>
         </node>
     <nodes>
</root>
Just one format error causes the whole xml data valueless, but it seems that in most time the deletexml() works well, does anyone knows what happens?
Thanks a lot.

Answer 1

KnightOfBlueArmor wrote:
The better idea is to use XMLPatch() if you can.
XMLPatch?
Do you use it yourself on a regular basis?
Personally, I find it fun to use but the performance doesn't match my expectations (no piecewise update/streaming eval AFAIK).
Message was edited by: odie_63