11g release 2 Unable to Select updatedXML

Question

Version: Oracle 11g Rel 2
XML stored AS BASICFILE BINARY XML
Updated XML using AppendChildXML, however unable to Query the Element/Attribute.Appreciate any help.
<SearchRecord>
<RECORD>
<ObjectInfo>
<Terms>
<FlexTerm FlexTermName="AuthKeyword">
<FlexTermValue>Possibility theory</FlexTermValue>
</FlexTerm>
<FlexTerm FlexTermName="AuthKeyword2">
<FlexTermValue>Possibility theory2</FlexTermValue>
</FlexTerm>
*<ClassTerm>*
*<ClassCode TermVocab="BulkTesting"/>*
*</ClassTerm>*
</Terms>
</ObjectInfo>
</RECORD>
</SearchRecord>
Try the following....
INSERT INTO TESTXML(CSXML_GOID,CSXML_DOC,CSXML_DATASET)VALUES(
1241,
XMLTYPE(' <SearchRecord>
<RECORD>
<ObjectInfo>
<Terms>
<FlexTerm FlexTermName="AuthKeyword">
<FlexTermValue>Possibility theory</FlexTermValue>
</FlexTerm>
<FlexTerm FlexTermName="AuthKeyword2">
<FlexTermValue>Possibility theory2</FlexTermValue>
</FlexTerm>
<ClassTerm>
<ClassCode TermVocab="BulkTesting"/>
</ClassTerm>
</Terms>
</ObjectInfo>
</RECORD>
</SearchRecord>'));
SELECT
XML.TermVocab
FROM
testxml csxml,
XMLTABLE(
'for $i in SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm/ClassCode
return element e {$i/@TermVocab }'
PASSING CSXML.CSXML_DOC COLUMNS TermVocab VARCHAR2(2000) PATH '@TermVocab' )
XML
where csxml_goid =1241;
---works result :BulkTesting
----Delete node:
UPDATE testxml -- Delete Node
SET csxml_doc =
DELETEXML(CSXML_DOC, '/SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm')
WHERE CSXML_GOID = 1241;
--appendchildxml
UPDATE testxml SET csxml_doc=
APPENDCHILDXML(CSXML_DOC,
'/SearchRecord/RECORD/ObjectInfo/Terms',
XMLTYPE('<ClassTerm>
<ClassCode TermVocab="BulkTesting"/>
</ClassTerm>'))
WHERE CSXML_GOID = 1241;
SELECT
XML.Author
FROM
testxml csxml,
XMLTABLE(
'for $i in SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm/ClassCode
return element e {$i/@TermVocab }'
PASSING CSXML.CSXML_DOC COLUMNS AUTHOR VARCHAR2(2000) PATH '@TermVocab' )
XML
where csxml_goid =1241;
--now rows
Appreciate any help.
Thansk,
Subu

Answer 1

Hi,
I tried to reproduce on this sample :
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as dev
SQL> CREATE TABLE test_xml (
  2   id number,
  3   doc xmltype
  4  )
  5  XMLTYPE doc STORE AS BASICFILE BINARY XML;
Table created
SQL> INSERT INTO test_xml values(1,
  2  xmltype('<SearchRecord>
  3  <RECORD>
  4  <ObjectInfo>
  5  <Terms>
  6  <FlexTerm FlexTermName="AuthKeyword">
  7  <FlexTermValue>Possibility theory</FlexTermValue>
  8  </FlexTerm>
  9  <FlexTerm FlexTermName="AuthKeyword2">
10  <FlexTermValue>Possibility theory2</FlexTermValue>
11  </FlexTerm>
12  <ClassTerm>
13  <ClassCode TermVocab="BulkTesting"/>
14  </ClassTerm>
15  </Terms>
16  </ObjectInfo>
17  </RECORD>
18  </SearchRecord>')
19  );
1 row inserted
SQL> UPDATE test_xml
  2  SET doc = DELETEXML(doc, '/SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm')
  3  WHERE id = 1;
1 row updated
SQL> UPDATE test_xml
  2  SET doc = APPENDCHILDXML(doc,
  3  '/SearchRecord/RECORD/ObjectInfo/Terms',
  4  XMLTYPE('<ClassTerm>
  5  <ClassCode TermVocab="BulkTesting"/>
  6  </ClassTerm>'))
  7  WHERE id = 1;
1 row updated
SQL> SELECT xml.TermVocab
  2  FROM test_xml t,
  3  XMLTABLE(
  4  'for $i in /SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm/ClassCode
  5  return element e {$i/@TermVocab }'
  6  PASSING t.DOC COLUMNS TermVocab VARCHAR2(2000) PATH '@TermVocab'
  7  ) xml
  8  WHERE id = 1;
TERMVOCAB
SQL>And here's the execution plan, a streaming XPath evaluation occurs (as expected with binary xml storage) :
Plan hash value: 779000122
| Id  | Operation          | Name     | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |          |  8168 |    15M|    32   (0)| 00:00:01 |
|   1 |  NESTED LOOPS      |          |  8168 |    15M|    32   (0)| 00:00:01 |
|*  2 |   TABLE ACCESS FULL| TEST_XML |     1 |  2015 |     3   (0)| 00:00:01 |
|   3 |   XPATH EVALUATION |          |       |       |            |          |
Predicate Information (identified by operation id):
   2 - filter("ID"=1)
Note
   - dynamic sampling used for this statement (level=2)See below the result by suppressing the XPath evaluation :
SQL> SELECT /*+ NO_XML_QUERY_REWRITE */
  2         xml.TermVocab
  3  FROM test_xml t,
  4  XMLTABLE(
  5  'for $i in /SearchRecord/RECORD/ObjectInfo/Terms/ClassTerm/ClassCode
  6  return element e {$i/@TermVocab }'
  7  PASSING t.DOC COLUMNS TermVocab VARCHAR2(2000) PATH '@TermVocab'
  8  ) xml
  9  WHERE id = 1;
TERMVOCAB
BulkTesting
It works.
So it seems that the XPath scan over the content is causing the problem.
However, when serialized, the content appears OK :
SQL> SELECT x.doc.getclobval() FROM test_xml x;
X.DOC.GETCLOBVAL()
<SearchRecord>
  <RECORD>
    <ObjectInfo>
      <Terms>
        <FlexTerm FlexTermName="AuthKeyword">
          <FlexTermValue>Possibility theory</FlexTermValue>
        </FlexTerm>
        <FlexTerm FlexTermName="AuthKeyword2">
          <FlexTermValue>Possibility theory2</FlexTermValue>
        </FlexTerm>
        <ClassTerm>
          <ClassCode TermVocab="BulkTesting"/>
        </ClassTerm>
      </Terms>
    </ObjectInfo>
  </RECORD>
</SearchRecord>
But this is definitely strange :
SQL> SELECT x.*
  2  FROM test_xml t,
  3  XMLTABLE(
  4   'for $i in /SearchRecord/RECORD/ObjectInfo/Terms/FlexTerm
  5    return $i'
  6  PASSING t.doc COLUMNS flexterm xmltype path '.' ) x
  7  WHERE id = 1;
FLEXTERM
<FlexTerm FlexTermName="AuthKeyword">
  <FlexTermValue>Possibility theory</FlexTermValue>
</FlexTerm>
<FlexTerm FlexTermName="AuthKeyword2">
  <FlexTermValue>Possibility theory2</FlexTermValue>
</FlexTerm>
<FlexTerm>
  <ClassCode TermVocab="BulkTesting"/>
</FlexTerm>
SQL>