Partial XMLType toObject

Question

Hi,
I have an XML schema registered with Oracle. The schema is annotated and during registration the PL/SQL types are created. I can validate an XMLType with this schema, as well as use toObject to populate an object with data from the XMLType. The XML looks like this:
<root>
<complexObject>...... very complex object with many elements, sub-elements and sequences .......</complexObject>
<complexObject>...... very complex object with many elements, sub-elements and sequences .......</complexObject>
<complexObject>...... very complex object with many elements, sub-elements and sequences .......</complexObject>
<complexObject>...... very complex object with many elements, sub-elements and sequences .......</complexObject>
<complexObject>...... very complex object with many elements, sub-elements and sequences .......</complexObject>
</root>
There can be a lot of "complexObject" elements in the sequence and the XML can be huge.
The <root> element has the corresponding T_ROOT type, the <complexObject> elements had the corresponding T_COMPLEXOBJECT type. T_ROOT has a VARRAY of T_COMPLEXOBJECT.
So, like I said before, I can populate an object of type T_ROOT from the XML without an issue using toObject on the XMLType. However, due to the complexity and size of the XML, I want to split the big XML into multiple T_COMPLEXOBJECT objects. I can do this using XPath extract in a query, returning me one XMLType row per "complexObject". Here is where I'm stuck: I want to use a cursor on the above query and process each "complexObject" one by one. For this, I need to somehow be able to do something similar with toObject, but on the "complexObject" XMLType fragment only to populate an object of type T_COMPLEXOBJECT, not on the whole T_ROOT.
If I do:
l_xml.toObject(l_obj, 'myschema.xsd', 'complexObject');
instead of
l_xml.toObject(l_obj_root, 'myschema.xsd', 'root');
I get:
ORA-31043: Element 'complexObject' not globally defined in schema 'myschema.xsd'
ORA-06512: at "SYS.XMLTYPE", line 196
ORA-06512: at line 38
Thanks!
Edited by: 1005635 on May 13, 2013 10:40 AM

Answer 1

Here's an example
SQL> --
SQL> -- def XMLDIR = &1
SQL> --
SQL> def USER_TABLESPACE = USERS
SQL> --
SQL> def TEMP_TABLESPACE = TEMP
SQL> --
SQL> drop user &USERNAME cascade
  2  /
old   1: drop user &USERNAME cascade
new   1: drop user XDBTEST cascade
User dropped.
Elapsed: 00:00:01.31
SQL> grant unlimited tablespace, create any directory, drop any directory, connect, resource, alter session, create view to &USERNAME identified by &PASSWORD
  2  /
old   1: grant unlimited tablespace, create any directory, drop any directory, connect, resource, alter session, create view to &USERNAME identified by &PASSWOR
D
new   1: grant unlimited tablespace, create any directory, drop any directory, connect, resource, alter session, create view to XDBTEST identified by XDBTEST
Grant succeeded.
Elapsed: 00:00:00.03
SQL> alter user &USERNAME default tablespace &USER_TABLESPACE temporary tablespace &TEMP_TABLESPACE
  2  /
old   1: alter user &USERNAME default tablespace &USER_TABLESPACE temporary tablespace &TEMP_TABLESPACE
new   1: alter user XDBTEST default tablespace USERS temporary tablespace TEMP
User altered.
Elapsed: 00:00:00.00
SQL> connect &USERNAME/&PASSWORD
Connected.
SQL> --
SQL> -- create or replace directory XMLDIR as '&XMLDIR'
SQL> -- /
SQL> var SCHEMAURL       varchar2(256)
SQL> var XMLSCHEMA       CLOB
SQL> var INSTANCE        CLOB;
SQL> --
SQL> set define off
SQL> --
SQL> alter session set events='31098 trace name context forever'
  2  /
Session altered.
Elapsed: 00:00:00.00
SQL>
SQL> begin
  2    :XMLSCHEMA :=
  3  '<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0">
  4          <xs:element name="PurchaseOrder" type="PurchaseOrderType"/>
  5          <xs:complexType name="PurchaseOrderType">
  6                  <xs:sequence>
  7                          <xs:element name="Reference" type="ReferenceType"/>
  8                          <xs:element name="Actions" type="ActionsType"/>
  9                          <xs:element name="Rejection" type="RejectionType" minOccurs="0"/>
10                          <xs:element name="Requestor" type="RequestorType"/>
11                          <xs:element name="User" type="UserType"/>
12                          <xs:element name="CostCenter" type="CostCenterType"/>
13                          <xs:element name="ShippingInstructions" type="ShippingInstructionsType"/>
14                          <xs:element name="SpecialInstructions" type="SpecialInstructionsType"/>
15                          <xs:element name="LineItems" type="LineItemsType"/>
16                  </xs:sequence>
17                  <xs:attribute name="DateCreated" type="xs:dateTime" use="required"/>
18          </xs:complexType>
19          <xs:complexType name="LineItemsType">
20                  <xs:sequence>
21                          <xs:element name="LineItem" type="LineItemType" maxOccurs="unbounded"/>
22                  </xs:sequence>
23          </xs:complexType>
24          <xs:complexType name="LineItemType">
25                  <xs:sequence>
26                          <xs:element name="Part" type="PartType"/>
27                          <xs:element name="Quantity" type="QuantityType"/>
28                  </xs:sequence>
29                  <xs:attribute name="ItemNumber" type="xs:integer"/>
30          </xs:complexType>
31          <xs:complexType name="PartType">
32                  <xs:simpleContent>
33                          <xs:extension base="UPCCodeType">
34                                  <xs:attribute name="Description" type="DescriptionType" use="required"/>
35                                  <xs:attribute name="UnitPrice" type="MoneyType" use="required"/>
36                          </xs:extension>
37                  </xs:simpleContent>
38          </xs:complexType>
39          <xs:simpleType name="ReferenceType">
40                  <xs:restriction base="xs:string">
41                          <xs:minLength value="18"/>
42                          <xs:maxLength value="30"/>
43                  </xs:restriction>
44          </xs:simpleType>
45          <xs:complexType name="ActionsType">
46                  <xs:sequence>
47                          <xs:element name="Action" maxOccurs="4">
48                                  <xs:complexType>
49                                          <xs:sequence>
50                                                  <xs:element name="User" type="UserType"/>
51                                                  <xs:element name="Date" type="DateType" minOccurs="0"/>
52                                          </xs:sequence>
53                                  </xs:complexType>
54                          </xs:element>
55                  </xs:sequence>
56          </xs:complexType>
57          <xs:complexType name="RejectionType">
58                  <xs:all>
59                          <xs:element name="User" type="UserType" minOccurs="0"/>
60                          <xs:element name="Date" type="DateType" minOccurs="0"/>
61                          <xs:element name="Comments" type="CommentsType" minOccurs="0"/>
62                  </xs:all>
63          </xs:complexType>
64          <xs:complexType name="ShippingInstructionsType">
65                  <xs:sequence>
66                          <xs:element name="name" type="NameType" minOccurs="0"/>
67                          <xs:element name="address" type="AddressType" minOccurs="0"/>
68                          <xs:element name="telephone" type="TelephoneType" minOccurs="0"/>
69                  </xs:sequence>
70          </xs:complexType>
71          <xs:simpleType name="MoneyType">
72                  <xs:restriction base="xs:decimal">
73                          <xs:fractionDigits value="2"/>
74                          <xs:totalDigits value="12"/>
75                  </xs:restriction>
76          </xs:simpleType>
77          <xs:simpleType name="QuantityType">
78                  <xs:restriction base="xs:decimal">
79                          <xs:fractionDigits value="4"/>
80                          <xs:totalDigits value="8"/>
81                  </xs:restriction>
82          </xs:simpleType>
83          <xs:simpleType name="UserType">
84                  <xs:restriction base="xs:string">
85                          <xs:minLength value="1"/>
86                          <xs:maxLength value="10"/>
87                  </xs:restriction>
88          </xs:simpleType>
89          <xs:simpleType name="RequestorType">
90                  <xs:restriction base="xs:string">
91                          <xs:minLength value="0"/>
92                          <xs:maxLength value="128"/>
93                  </xs:restriction>
94          </xs:simpleType>
95          <xs:simpleType name="CostCenterType">
96                  <xs:restriction base="xs:string">
97                          <xs:minLength value="1"/>
98                          <xs:maxLength value="4"/>
99                          <xs:enumeration value=""/>
100                          <xs:enumeration value="A0"/>
101                          <xs:enumeration value="A10"/>
102                          <xs:enumeration value="A20"/>
103                          <xs:enumeration value="A30"/>
104                          <xs:enumeration value="A40"/>
105                          <xs:enumeration value="A50"/>
106                          <xs:enumeration value="A60"/>
107                          <xs:enumeration value="A70"/>
108                          <xs:enumeration value="A80"/>
109                          <xs:enumeration value="A90"/>
110                          <xs:enumeration value="A100"/>
111                          <xs:enumeration value="A110"/>
112                  </xs:restriction>
113          </xs:simpleType>
114          <xs:simpleType name="PurchaseOrderNumberType">
115                  <xs:restriction base="xs:integer"/>
116          </xs:simpleType>
117          <xs:simpleType name="SpecialInstructionsType">
118                  <xs:restriction base="xs:string">
119                          <xs:minLength value="0"/>
120                          <xs:maxLength value="1000"/>
121                  </xs:restriction>
122          </xs:simpleType>
123          <xs:simpleType name="NameType">
124                  <xs:restriction base="xs:string">
125                          <xs:minLength value="1"/>
126                          <xs:maxLength value="20"/>
127                  </xs:restriction>
128          </xs:simpleType>
129          <xs:simpleType name="AddressType">
130                  <xs:restriction base="xs:string">
131                          <xs:minLength value="1"/>
132                          <xs:maxLength value="256"/>
133                  </xs:restriction>
134          </xs:simpleType>
135          <xs:simpleType name="TelephoneType">
136                  <xs:restriction base="xs:string">
137                          <xs:minLength value="1"/>
138                          <xs:maxLength value="24"/>
139                  </xs:restriction>
140          </xs:simpleType>
141          <xs:simpleType name="DateType">
142                  <xs:restriction base="xs:date"/>
143          </xs:simpleType>
144          <xs:simpleType name="CommentsType">
145                  <xs:restriction base="xs:string">
146                          <xs:minLength value="1"/>
147                          <xs:maxLength value="1000"/>
148                  </xs:restriction>
149          </xs:simpleType>
150          <xs:simpleType name="DescriptionType">
151                  <xs:restriction base="xs:string">
152                          <xs:minLength value="1"/>
153                          <xs:maxLength value="128"/>
154                  </xs:restriction>
155          </xs:simpleType>
156          <xs:simpleType name="UPCCodeType">
157                  <xs:restriction base="xs:string">
158                          <xs:minLength value="11"/>
159                          <xs:maxLength value="14"/>
160                          <xs:pattern value="\d{11}"/>
161                          <xs:pattern value="\d{12}"/>
162                          <xs:pattern value="\d{13}"/>
163                          <xs:pattern value="\d{14}"/>
164                  </xs:restriction>
165          </xs:simpleType>
166  </xs:schema>';
167    :INSTANCE :=
168  '<PurchaseOrder>
169     <Reference>ABULL-20100809203001136PDT</Reference>
170     <Actions>
171        <Action>
172           <User>ACABRIO</User>
173        </Action>
174     </Actions>
175     <Rejection/>
176     <Requestor>Alexis Bull</Requestor>
177     <User>ABULL</User>
178     <CostCenter>A50</CostCenter>
179     <ShippingInstructions>
180        <name>Alexis Bull</name>
181        <address>2011 Interiors Blvd,
182  South San Francisco,
183  California 99236
184  United States of America</address>
185        <telephone>950-720-3387</telephone>
186     </ShippingInstructions>
187     <SpecialInstructions>COD</SpecialInstructions>
188     <LineItems>
189        <LineItem ItemNumber="1" >
190           <Part Description="Scary Movie" UnitPrice="19.95">717951004857</Part>
191           <Quantity>5.0</Quantity>
192        </LineItem>
193        <LineItem ItemNumber="2" >
194           <Part Description="The Faculty" UnitPrice="19.95">717951002280</Part>
195           <Quantity>2.0</Quantity>
196        </LineItem>
197        <LineItem ItemNumber="3">
198           <Part Description="Phantom of the Paradise" UnitPrice="27.95">24543023777</Part>
199           <Quantity>3.0</Quantity>
200        </LineItem>
201     </LineItems>
202  </PurchaseOrder>';
203  end;
204  /
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.00
SQL> declare
  2    V_XML_SCHEMA xmlType := XMLType(:XMLSCHEMA1);end;
  3  /
SP2-0552: Bind variable "XMLSCHEMA1" not declared.
Elapsed: 00:00:00.00
SQL> --
SQL> declare
  2    V_XMLSCHEMA XMLTYPE := XMLTYPE(:XMLSCHEMA);
  3  begin
  4    DBMS_XMLSCHEMA.registerSchema(
  5      schemaURL => 'http://localhost:80/home/SCOTT/poSource/xsd/purchaseOrder.xsd',
  6      schemaDoc => V_XMLSCHEMA,
  7      local     => TRUE,
  8      genTypes  => TRUE,
  9      genTables => FALSE
10    );
11  end;
12  /
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.35
SQL> create table PURCHASEORDER
  2         of XMLTYPE
  3         XMLSCHEMA "http://localhost:80/home/SCOTT/poSource/xsd/purchaseOrder.xsd" ELEMENT "PurchaseOrder"
  4  /
Table created.
Elapsed: 00:00:00.10
SQL> call DBMS_XMLSTORAGE_MANAGE.renameCollectionTable (USER,'PURCHASEORDER',NULL,'/PurchaseOrder/LineItems/LineItem','LINEITEM_TABLE',NULL)
  2  /
Call completed.
Elapsed: 00:00:00.87
SQL> call DBMS_XMLSTORAGE_MANAGE.renameCollectionTable (USER,'PURCHASEORDER',NULL,'/PurchaseOrder/Actions/Action','ACTION_TABLE',NULL)
  2  /
Call completed.
Elapsed: 00:00:00.09
SQL> desc PURCHASEORDER
Name                                      Null?    Type
TABLE of SYS.XMLTYPE(XMLSchema "http://localhost:80/home/SCOTT/poSource/xsd/purchaseOrder.xsd" Element "PurchaseOrder") STORAGE Object-relational TYPE "Purchase
OrderType667_T"
SQL> --
SQL> insert into PURCHASEORDER values (XMLTYPE(:INSTANCE))
  2  /
1 row created.
Elapsed: 00:00:00.44
SQL> commit
  2  /
Commit complete.
Elapsed: 00:00:00.00
SQL> create or replace type ACTION_T as object (
  2    USER_NAME                                          VARCHAR2(10 CHAR),
  3    ACTION_DATE                                        DATE
  4  )
  5  /
Type created.
Elapsed: 00:00:00.02
SQL> show errors
No errors.
SQL> /
Type created.
Elapsed: 00:00:00.01
SQL> create or replace type ACTION_V as VARRAY(32767) of ACTION_T
  2  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type ACTIONS_T as object (
  2    ACTION  ACTION_V
  3  )
  4  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type REJECTION_T as object (
  2    USER_NAME                                          VARCHAR2(10 CHAR),
  3    REJECTION_DATE                                     DATE,
  4    COMMENTS                                           VARCHAR2(1000 CHAR)
  5  )
  6  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type SHIPPING_INSTRUCTIONS_T as object (
  2    NAME                                               VARCHAR2(20 CHAR),
  3    ADDRESS                                            VARCHAR2(256 CHAR),
  4    TELEPHONE                                          VARCHAR2(24 CHAR)
  5  )
  6  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type PART_T as object (
  2   PART_TEXT                                          VARCHAR2(14 CHAR),
  3   DESCRIPTION                                        VARCHAR2(128 CHAR),
  4   UNITPRICE                                          NUMBER(14,2)
  5  )
  6  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> /
Type created.
Elapsed: 00:00:00.00
SQL> create or replace type LINEITEM_T as object (
  2    ITEMNUMBER                                         NUMBER(38),
  3    PART                                               PART_T,
  4    QUANTITY                                           NUMBER(12,4)
  5  )
  6  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> /
Type created.
Elapsed: 00:00:00.00
SQL> create or replace type LINEITEM_V as VARRAY(32767) of LINEITEM_T
  2  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type LINEITEMS_T as object (
  2    LINEITEM  LINEITEM_V
  3  )
  4  /
Type created.
Elapsed: 00:00:00.01
SQL> show errors
No errors.
SQL> --
SQL> create or replace type PURCHASEORDER_T as object (
  2   DATECREATED                                        TIMESTAMP(6),
  3   REFERENCE                                          VARCHAR2(30 CHAR),
  4   ACTIONS                                            ACTIONS_T,
  5   REJECTION                                          REJECTION_T,
  6   REQUESTOR                                          VARCHAR2(128 CHAR),
  7   USER_NAME                                          VARCHAR2(10 CHAR),
  8   COSTCENTER                                         VARCHAR2(4 CHAR),
  9   SHIPPINGINSTRUCTIONS                               SHIPPING_INSTRUCTIONS_T,
10   SPECIALINSTRUCTIONS                                VARCHAR2(1000 CHAR),
11   LINEITEMS                                          LINEITEMS_T
12  )
13  /
Type created.
Elapsed: 00:00:00.12
SQL> show errors
No errors.
SQL> --
SQL> select PURCHASEORDER_T (
  2           DATECREATED,
  3                                   REFERENCE,
  4                                   ACTIONS_T(
  5                                     CAST(
  6               MULTISET(
  7                 SELECT ACTION_T(
  8                          USER_NAME,
  9                          ACTION_DATE
10                        )
11                   FROM XMLTABLE(
12                         '/Actions/Action'
13                          passing ACTIONS
14                          columns
15                            USER_NAME        VARCHAR2(10 CHAR) path 'User',
16                            ACTION_DATE      DATE              path 'Date'
17                        )
18               ) AS ACTION_V
19             )
20           ),
21           (
22                             select REJECTION_T (
23                      USER_NAME,
24                      REJECTION_DATE,
25                      COMMENTS
26                    )
27               from XMLTABLE(
28                      '/Rejection'
29                      passing REJECTION
30                      columns
31                        USER_NAME         VARCHAR2(10 CHAR)     path 'User',
32                        REJECTION_DATE    DATE                  path 'Date',
33                        COMMENTS          VARCHAR2(1000 CHAR)   path 'Comments'
34                    )
35           ),
36                                   REQUESTOR,
37                                   USER_NAME,
38           COSTCENTER,
39                           (
40                             select SHIPPING_INSTRUCTIONS_T (
41                      USER_NAME,
42                      ADDRESS,
43                      TELEPHONE
44                    )
45               from XMLTABLE(
46                      '/ShippingInstructions'
47                      passing SHIPPING_INSTRUCTIONS
48                      columns
49                        USER_NAME       VARCHAR2(20 CHAR)    path 'name',
50                        ADDRESS         VARCHAR2(256 CHAR)   path 'address',
51                        TELEPHONE       VARCHAR2(24 CHAR)    path 'telephone'
52                    )
53           ),
54           SPECIAL_INSTRUCTIONS,
55                                   LINEITEMS_T(
56                                     CAST(
57               MULTISET(
58                 SELECT LINEITEM_T (
59                          ITEMNUMBER,
60                          (
61                            select PART_T(
62                                     PART_TEXT,
63                                     DESCRIPTION,
64                                     UNITPRICE
65                                   )
66                              from XMLTABLE(
67                                     '/Part'
68                                     passing PART
69                                     columns
70                                       PART_TEXT          VARCHAR2(14 CHAR)  path 'text()',
71                                       DESCRIPTION        VARCHAR2(128 CHAR) path '@Description',
72                                       UNITPRICE          NUMBER(14,2)       path '@UnitPrice'
73                                   )
74                          ),
75                          QUANTITY
76                        )
77                   FROM XMLTABLE(
78                         '/LineItems/LineItem'
79                          passing LINEITEMS
80                          columns
81                            ITEMNUMBER   NUMBER(38)   path '@ItemNumber',
82                            PART         XMLTYPE      path 'Part',
83                            QUANTITY     NUMBER(12,4) path 'Quantity'
84                        )
85               ) AS LINEITEM_V
86             )
87           )
88         )
89    from PURCHASEORDER,
90         XMLTABLE(
91           '/PurchaseOrder'
92           passing OBJECT_VALUE
93           columns
94              DATECREATED               TIMESTAMP(6)        path '@DateCreated',
95                                                  REFERENCE                 VARCHAR2(30 CHAR)   path 'Reference',
96                                                  ACTIONS                   XMLTYPE             path 'Actions',
97                                                  REJECTION                 XMLTYPE             path 'Rejection',
98                                                  REQUESTOR                 VARCHAR2(128 CHAR)  path 'Requestor',
99                                                  USER_NAME                 VARCHAR2(10 CHAR)   path 'User',
100                                                  COSTCENTER                VARCHAR2(4 CHAR)    path 'CostCenter',
101                                                  SHIPPING_INSTRUCTIONS     XMLTYPE             path 'ShippingInstructions',
102                                                  SPECIAL_INSTRUCTIONS      VARCHAR2(1000 CHAR) path 'SpecialInstructions',
103                                                  LINEITEMS                 XMLType             path 'LineItems'
104                     )
105  /
PURCHASEORDER_T(DATECREATED,REFERENCE,ACTIONS_T(CAST(MULTISET(SELECTACTION_T(USE
PURCHASEORDER_T(NULL, 'ABULL-20100809203001136PDT', ACTIONS_T(ACTION_V(ACTION_T(
'ACABRIO', NULL))), REJECTION_T(NULL, NULL, NULL), 'Alexis Bull', 'ABULL', 'A50'
, SHIPPING_INSTRUCTIONS_T('Alexis Bull', '2011 Interiors Blvd,
South San Francisco,
California 99236
United States of America', '950-720-3387'), 'COD', LINEITEMS_T(LINEITEM_V(LINEIT
EM_T(1, PART_T('717951004857', 'Scary Movie', 19.95), 5), LINEITEM_T(2, PART_T('
717951002280', 'The Faculty', 19.95), 2), LINEITEM_T(3, PART_T('24543023777', 'P
hantom of the Paradise', 27.95), 3))))
Elapsed: 00:00:00.11
SQL> quitEdited by: mdrake on May 13, 2013 11:33 PM