How to select values of nested elements that have maxOccurs="unbounded"
I have the following xml schema and xml data:
<?xml version="1.0" encoding="UTF-8"?>
<!--W3C Schema generated by XML Spy v4.4 U (http://www.xmlspy.com)-->
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:qbl="http://10.0.1.233:8080/home/cpa/xsd/qbl.xsd" xmlns:xdb="http://xmlns.oracle.com/xdb" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified" version="1.0" xdb:storeVarrayAsTable="true">
<xs:element name="QBL_Envelope" type="QBL_Envelope_Type" xdb:defaultTable="MYQBL"/>
<xs:complexType name="QBL_Envelope_Type">
<xs:sequence>
<xs:element ref="Transmission_Date" minOccurs="0"/>
<xs:element ref="QBL" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:element name="Transmission_Date" type="xs:string"/>
<xs:element name="QBL">
<xs:complexType>
<xs:sequence>
<xs:element ref="QBL_Number"/>
<xs:element ref="Priority"/>
<xs:element ref="Date_Prepared"/>
<xs:element ref="Line_Item" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="QBL_Number" type="xs:string"/>
<xs:element name="Priority" type="xs:string"/>
<xs:element name="Date_Prepared" type="xs:string"/>
<xs:element name="Line_Item">
<xs:complexType>
<xs:sequence>
<xs:element ref="Item_Name" maxOccurs="unbounded"/>
<xs:element ref="Line_Item_Weight"/>
<xs:element ref="Line_Item_Cube_Info"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Line_Item_Cube_Info">
<xs:complexType>
<xs:sequence>
<xs:element ref="Line_Item_Cube" minOccurs="0"/>
<xs:element ref="Line_Item_Cube_Qualifier" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Line_Item_Cube" type="xs:string"/>
<xs:element name="Line_Item_Cube_Qualifier" type="xs:string"/>
<xs:element name="Item_Name" type="xs:string"/>
<xs:element name="Line_Item_Weight" type="xs:string"/>
</xs:schema>
insert into MYQBL values(
xmltype('<QBL_Envelope>
<Transmission_Date>030531</Transmission_Date>
<QBL>
<QBL_Number>316180J2</QBL_Number>
<Priority>3</Priority>
<Date_Prepared>20030530</Date_Prepared>
<Line_Item>
<Item_Name>FREIGHT ALL KINDS</Item_Name>
<Item_Name>Specail Item</Item_Name>
<Line_Item_Weight>0000212</Line_Item_Weight>
<Line_Item_Cube_Info>
<Line_Item_Cube>31.1</Line_Item_Cube>
<Line_Item_Cube_Qualifier>E</Line_Item_Cube_Qualifier>
</Line_Item_Cube_Info>
</Line_Item>
<Line_Item>
<Item_Name>AAAAAA</Item_Name>
<Item_Name>BBBBBBBB</Item_Name>
<Line_Item_Weight>0000512</Line_Item_Weight>
<Line_Item_Cube_Info>
<Line_Item_Cube>67.1</Line_Item_Cube>
<Line_Item_Cube_Qualifier>E</Line_Item_Cube_Qualifier>
</Line_Item_Cube_Info>
</Line_Item>
</QBL>
</QBL_Envelope>').createSchemaBasedXML('http://10.0.1.233:8080/home/cpa/xsd/qbl.xsd'));
My question is how to select
/QBL_Envelope/QBL/QBL_Number,
/QBL_Envelope/QBL/Line_Item/Item_Name,
/QBL_Envelope/QBL/Line_Item/Line_Item_Weight,
/QBL_Envelope/QBL/Line_Item/Line_Item_Cube_Info/Line_Item_Cube
/QBL_Envelope/QBL/Line_Item/Line_Item_Cube_Info/Line_Item_Cube_Qualifier
in a select stetament? (Note that these elements QBL_Number, Line_Item and Item_Name have maxOccurs="unbounded") actually I want to use the select statement to create a view.
I tried the following select statement and it works fine:
select extractValue(value(b), '/QBL/QBL_Number'),
extractValue(value(b), '/QBL/Priority'),
extractValue(value(b), '/QBL/Date_Prepared')
from egbl e, table(xmlsequence(extract(value(e), '/QBL_Envelope/QBL'))) b
Please advise. It is import to us. Thank you for your help in advance!!!
The database version is 9.2.0.3.0 and the operating system is Windows 2000.
Thanks,
Mary Wu
Hi Mark,
Thank you for your reply and I really appreciate!
I tried the select statement you gave me but I got error:
SQL*Plus: Release 9.2.0.3.0 - Production on Fri Aug 1 09:11:03 2003
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.3.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
SQL> set long 10000;
SQL> set pagesize 10000
SQL> select * from myqbl;
SYS_NC_ROWINFO$
<QBL_Envelope>
<Transmission_Date>030531</Transmission_Date>
<QBL>
<QBL_Number>316180J2</QBL_Number>
<Priority>3</Priority>
<Date_Prepared>20030530</Date_Prepared>
<Line_Item>
<Item_Name>FREIGHT ALL KINDS</Item_Name>
<Item_Name>Specail Item</Item_Name>
<Line_Item_Weight>0000212</Line_Item_Weight>
<Line_Item_Cube_Info>
<Line_Item_Cube>31.1</Line_Item_Cube>
<Line_Item_Cube_Qualifier>E</Line_Item_Cube_Qualifier>
</Line_Item_Cube_Info>
</Line_Item>
<Line_Item>
<Item_Name>AAAAAA</Item_Name>
<Item_Name>BBBBBBBB</Item_Name>
<Line_Item_Weight>0000512</Line_Item_Weight>
<Line_Item_Cube_Info>
<Line_Item_Cube>67.1</Line_Item_Cube>
<Line_Item_Cube_Qualifier>E</Line_Item_Cube_Qualifier>
</Line_Item_Cube_Info>
</Line_Item>
</QBL>
</QBL_Envelope>
SQL> select extractValue(value(q), '/QBL/QBL_Number'),
2 extractValue(value(q), '/QBL/Priority'),
3 extractValue(value(q), '/QBL/Date_Prepared'),
4 extractValue(value(n), '/Item_Name'),
5 extractValue(value(l), '/Line_Item/Line_Item_Weight'),
6 extractValue(value(l), '/Line_Item/Line_Item_Cube_Info/Line_Item_Cube'),
7 extractValue(value(l), '/Line_Item/Line_Item_Cube_Info/Line_Item_Cube_Qualifier')
8 from MYQBL e,
9 table (xmlsequence(extract(value(e), '/QBL_Envelope/QBL'))) q,
10 table (xmlsequence(extract(value(q), '/QBL/Line_Item'))) l,
11 table (xmlsequence(extract(value(l), '/Line_Item/Item_Name'))) n;
select extractValue(value(q), '/QBL/QBL_Number'),
ERROR at line 1:
ORA-00904: "SYS_NT0jPUiVR5SS6VqgqEvU1LkQ=="."SYS_NC_ROWINFO$": invalid
identifier
SQL>
Do you have any idea about it?
Actually before I posted the message I had tried the same select statement and had got the same error.
Again, thank you very much and I really appreciate your help.
Mary Wu
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