XML load and retrive from oracle.

Question

Hi
I am able to validate and load the xml file to xmltype column of database table. how can i get the inforation of each node sepeately (row wise) from sql query.
I tried following query but giving me error.
<?xml version="1.0" encoding="utf-8" ?>
<caieers>
     <caieers_header>
          <file_name>eers000252.xml</file_name>
          <business_unit>CAI Common Services</business_unit>
          <sson_id>255</sson_id>
          <date>2006-12-30</date>
     </caieers_header>
     <caieers_entitlements>
          <caieers_data>
               <soeid>in12345</soeid>
               <role_code>read_only</role_code>
               <role_desc>Read-only access to reports</role_desc>
               <as_of_date>2006-12-30</as_of_date>
          </caieers_data>
          <caieers_data>
               <soeid>pp12345</soeid>
               <role_code>Admin</role_code>
               <as_of_date>2006-12-30</as_of_date>
          </caieers_data>
          <caieers_data>
               <soeid>ns12345</soeid>
               <role_code>read_write</role_code>
               <role_desc>Can update data</role_desc>
               <as_of_date>2006-12-30</as_of_date>
          </caieers_data>
     </caieers_entitlements>
</caieers>
SELECT p.XML_DOC.extractvalue('/caieers/caieers_header/file_name/text()').getstringval() as File_name,
p.XML_DOC.extract('/caieers/caieers_header/business_unit/text()').getstringval() as Business_unit,
p.XML_DOC.extract('/caieers/caieers_header/sson_id/text()').getstringval() as sson_id,
p.XML_DOC.extract('/caieers/caieers_header/date/text()').getstringval() as Dateoffile,
p.XML_DOC.extract('/caieers/caieers_entitlements/caieers_data//soeid/text()').getstringval() as soeid,
p.XML_DOC.extract('caieers/caieers_entitlements/caieers_data//role_code/text()').getstringval() as role_code,
p.XML_DOC.extract('caieers/caieers_entitlements/caieers_data//role_desc/text()').getstringval() as role_desc,
p.XML_DOC.extract('caieers/caieers_entitlements/caieers_data//as_of_date/text()').getstringval() as asofdate
FROM test p,
table(xmlsequence(extract(value(mat),'/caieers/caieers_entitlements/caieers_data'))) ctb
ERROR at line 10:
ORA-00904: "MAT": invalid identifier
Aslo if anybody help me to find best way to load this file in relational table (at present it was loaded as xmltype column)
Thanks a lot
Regards
Raju

Answer 1

Try this example
I"ve modified the XML Schema to automatically create the table during schema registration.
SQL>
SQL>
SQL> var schemaURL varchar2(256)
SQL> var schemaPath varchar2(256)
SQL> --
SQL> begin
  2    :schemaURL := 'http://www.w3.org/2001/XMLSchema/CAIEERS.xsd';
  3    :schemaPath := '/public/CAIEERS.xsd';
  4  end;
  5  /
PL/SQL procedure successfully completed.
SQL> call dbms_xmlSchema.deleteSchema(:schemaURL,4)
  2  /
Call completed.
SQL> declare
  2    res boolean;
  3    xmlSchema xmlType := xmlType(
  4  '<?xml version="1.0" encoding="utf-8"?>
  5  <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xdb="http://xmlns.oracle.com/xdb" xdb:storeVarrayAsTable="true">
  6     <xsd:element name="caieers" type="caieers_type" xdb:defaultTable="caieers_tb"/>
  7     <xsd:complexType name="caieers_type">
  8             <xsd:sequence>
  9                     <xsd:element name="caieers_header" type="caieers_header_type"/>
10                     <xsd:element name="caieers_entitlements" type="caieers_entitlements_type"/>
11             </xsd:sequence>
12     </xsd:complexType>
13     <xsd:complexType name="caieers_entitlements_type">
14             <xsd:sequence>
15                     <xsd:element name="caieers_data" type="caieers_data_type" maxOccurs="unbounded"/>
16             </xsd:sequence>
17     </xsd:complexType>
18     <xsd:complexType name="caieers_header_type">
19             <xsd:sequence>
20                     <xsd:element name="file_name" type="xsd:string"/>
21                     <xsd:element name="business_unit" type="xsd:string"/>
22                     <xsd:element name="sson_id" type="xsd:integer"/>
23                     <xsd:element name="date" type="xsd:date"/>
24             </xsd:sequence>
25     </xsd:complexType>
26     <xsd:complexType name="caieers_data_type">
27             <xsd:sequence>
28                     <xsd:element name="soeid" type="soeid_type"/>
29                     <xsd:element name="role_code" type="role_code_type"/>
30                     <xsd:element name="role_desc" type="role_desc_type" minOccurs="0"/>
31                     <xsd:element name="as_of_date" type="xsd:date"/>
32             </xsd:sequence>
33     </xsd:complexType>
34     <xsd:simpleType name="soeid_type">
35             <xsd:restriction base="xsd:string">
36                     <xsd:pattern value="[a-zA-Z]{2}\d{5}"/>
37             </xsd:restriction>
38     </xsd:simpleType>
39     <xsd:simpleType name="role_code_type">
40             <xsd:restriction base="xsd:string">
41                     <xsd:maxLength value="30"/>
42             </xsd:restriction>
43     </xsd:simpleType>
44     <xsd:simpleType name="role_desc_type">
45             <xsd:restriction base="xsd:string">
46                     <xsd:maxLength value="255"/>
47             </xsd:restriction>
48     </xsd:simpleType>
49  </xsd:schema>
50  ');
51  begin
52    if (dbms_xdb.existsResource(:schemaPath)) then
53      dbms_xdb.deleteResource(:schemaPath);
54    end if;
55    res := dbms_xdb.createResource(:schemaPath,xmlSchema);
56  end;
57  /
PL/SQL procedure successfully completed.
SQL> begin
  2    dbms_xmlschema.registerSchema
  3    (
  4      :schemaURL,
  5      xdbURIType(:schemaPath).getClob(),
  6      TRUE,TRUE,FALSE,TRUE
  7    );
  8  end;
  9  /
PL/SQL procedure successfully completed.
SQL> declare
  2    xmldoc xmltype := xmltype(
  3  '<?xml version="1.0" encoding="utf-8"?>
  4  <caieers>
  5     <caieers_header>
  6             <file_name>eers000252.xml</file_name>
  7             <business_unit>CAI Common Services</business_unit>
  8             <sson_id>255</sson_id>
  9             <date>2006-12-30</date>
10     </caieers_header>
11     <caieers_entitlements>
12             <caieers_data>
13                     <soeid>in12345</soeid>
14                     <role_code>read_only</role_code>
15                     <role_desc>Read-only access to reports</role_desc>
16                     <as_of_date>2006-12-30</as_of_date>
17             </caieers_data>
18             <caieers_data>
19                     <soeid>pp12345</soeid>
20                     <role_code>Admin</role_code>
21                     <as_of_date>2006-12-30</as_of_date>
22             </caieers_data>
23             <caieers_data>
24                     <soeid>ns12345</soeid>
25                     <role_code>read_write</role_code>
26                     <role_desc>Can update data</role_desc>
27                     <as_of_date>2006-12-30</as_of_date>
28             </caieers_data>
29     </caieers_entitlements>
30  </caieers>');
31  begin
32    xmldoc := xmldoc.createSchemaBasedXML(:schemaURL);
33    insert into "caieers_tb" values ( xmldoc );
34  end;
35  /
PL/SQL procedure successfully completed.
SQL> set autotrace on explain pages 0 lines 150 long 1000
SQL> --
SQL> select extractValue(value(p),'/caieers/caieers_header/file_name') FileName,
  2         extractValue(value(p),'/caieers/caieers_header/business_unit') Business_unit,
  3         extractValue(value(p),'/caieers/caieers_header/sson_id')  sson_id,
  4         extractValue(value(p),'/caieers/caieers_header/date')  Dateoffile,
  5         extractValue(value(ctb),'/caieers_data/soeid') soeid,
  6         extractValue(value(ctb),'/caieers_data/role_code') role_code,
  7         extractValue(value(ctb),'/caieers_data/role_desc') role_desc,
  8         extractValue(value(ctb),'/caieers_data/as_of_date') as asofdate
  9    FROM "caieers_tb" p,
10   table (xmlsequence(extract(value(p),'/caieers/caieers_entitlements/caieers_data'))) ctb
11  /
eers000252.xml
CAI Common Services
       255 30-DEC-06
in12345
read_only
Read-only access to reports
30-DEC-06
eers000252.xml
CAI Common Services
       255 30-DEC-06
pp12345
Admin
30-DEC-06
eers000252.xml
CAI Common Services
       255 30-DEC-06
ns12345
read_write
Can update data
30-DEC-06
Execution Plan
Plan hash value: 3549528997
| Id  | Operation          | Name               | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |                    |     3 | 19983 |   805   (1)| 00:00:10 |
|   1 |  NESTED LOOPS      |                    |     3 | 19983 |   805   (1)| 00:00:10 |
|*  2 |   TABLE ACCESS FULL| caieers_tb         |     1 |  4056 |     3   (0)| 00:00:01 |
|*  3 |   INDEX RANGE SCAN | SYS_IOT_TOP_379781 |     3 |  7815 |     1   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype('<privilege
              xmlns="http://xmlns.oracle.com/xdb/acl.xsd"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
              http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><rea
              d-properties/><read-contents/></privilege>'))=1)
   3 - access("NESTED_TABLE_ID"="caieers_tb"."SYS_NC0001900020$")
       filter("SYS_NC_TYPEID$" IS NOT NULL)
Note
   - dynamic sampling used for this statement
SQL>
SQL>
SQL>