Developer & Fusion Middleware 1 | Mark Drake | An introduction to Oracle XML DB in Oracle database 11g Release 2.pdf

<Insert Picture Here>

An Introduction to Oracle XML DB in Oracle Database 11g Release 2
Mark D Drake
Manager, Product Management

The following is intended to outline our general
product direction. It is intended for information
purposes only, and may not be incorporated into any
contract. It is not a commitment to deliver any
material, code, or functionality, and should not be
relied upon in making purchasing decisions.
The development, release, and timing of any
features or functionality described for Oracle’s
products remains at the sole discretion of Oracle.

2

Oracle XML DB
Why XML ?

4

Why XML ?

• Open, vendor-neutral standards, driven by W3C
– XML, XMLSchema, XQuery, XSLT, DOM etc
– Standard well-understood API implantations available for
most common development environments
• Easily understood, flexible and verifiable data model
– Simplifies data exchange between loosely connected
applications
• Equally applicable to data and document centric
applications
– Delivers flexibility for data-centric applications
– Delivers structure for content-centric applications
• Widely adopted for critical industry standards

5

Sample XML-based Standards

– XBRL – Financial and Regulatory reporting
– FPML, FixML, Accord : Financial Services
– MISMO : Mortgage Origination
– ACORD : Insurance
– HL7 : Healthcare
– ebXML, UBL : E-commerce
– GJXML, NIEM: Law Enforcement and Public Safety
– RSS: publishing / syndication of content
– DICOM, EXIF: for Digital Imaging
– OpenGIS, KML: Spatial applications
– XFORMS : XML forms

6

XML Segmentation model

Data Capture & Data
Data Exchange Persistence

<XML/>

Content Document
Management Authoring

8

Oracle XML DB
Introduction

9

Oracle’s XML Vision

• Enable a single source of truth for XML
• Provide the best platform for managing all your XML
– Flexibility to allow optimal processing of data-centric and
content-centric XML
– Deliver Oracle’s commitment to Reliability, Security,
Availability and Scalability
• Drive and implement key XML Standards
• Support SQL-centric, XML-centric and document-
centric development paradigms
• Support XML in Database and Application Server

10

Oracle & XML : Sustained Innovation

Binary XML
Storage
& Indexing
Performance

XQuery

XML
Storage &
XML Repository
API’s

1998 2001 2004 2007

11

XML DB Summary

• XMLType
– XML storage and indexing
• XQuery, XML Schema, XSLT
– XML centric development
• SQL/XML
– XML publishing
• XMLDB repository
– XML specific content management
• Standards compliant
– Strict adherence and conformance

12

Oracle XML DB
XMLType and XQuery

13

XMLType

• Standard data type, makes database XML aware
– Use as Table, Column, Variable, Argument or Return Value
• Abstraction for managing XML
– Enforces XML content model and XML fidelity
– Enables XML schema validation
– Multiple persistence and indexing options
• Query and update operations performed using
XQuery
• All application logic is independent of persistence
model

14

Using XMLType

create table INVOICES of XMLTYPE;

create table PURCHCASEORDERS (
PO_NUMBER NUMBER(4),
PO_DETAILS XMLTYPE
)
XMLTYPE column PO_DETAILS
XMLSCHEMA "http://schemas.example.com/PurchaseOrder.xsd"
ELEMENT “PurchaseOrder“
STORE AS OBJECT RELATIONAL;

15

XQuery

• W3C standard for generating, querying and updating
XML
– Natural query language for XML content
– Evolved from XPath and XSLT
– Analogous to SQL in the relational world
• Iterative rather than Set-Based
• Basic construct is the FLWOR clause
– FOR, LET, WHERE, ORDER, RETURN…
• XQuery operations result in a sequence consisting of
zero or more nodes

16

XQuery FLWOR example

for $l in $PO/PurchaseOrder/LineItems/LineItem
return $l/Part/@Description

<PurchaseOrder DateCreated=“2011-01-31”>
…
<LineItems>
<LineItem ItemNumber="1">
<Part Description="Octopus“>31398750123</Part> Octopus
<Quantity>3.0</Quantity> ….
</LineItem>
….. King Ralph
<LineItem ItemNumber="5">
<Part Description="King Ralph">18713810168</Part>
<Quantity>7.0</Quantity>
</LineItem>
</LineItems>
</PurchaseOrder>

17

XQuery fn:collection

for $doc in fn:collection(“oradb:/OE/PURCHASEORDER”)
return $doc

• Used to access a collection of documents
– Allows an XQuery to operate on a set of XML documents
• Collection sources include
– The contents of a folder
– XMLType tables or columns
– Relational Tables via a conical mapping scheme
• Protocol “oradb:” causes the components of the path
should be interpreted as a Schema, Table, Column
– Column is optional

18

XQuery : Where and Order by clause

let $USER := “SKING”
for $doc in fn:collection(“oradb:/OE/PURCHASEORDER”)
where $doc/PurchaseOrder[User = $USER]
order by $doc/PurchaseOrder/Reference
return $doc/PurchaseOrder/Reference

• Where clause controls which documents or nodes are
processed
• Order by clause control ordering of nodes in
sequence

19

XQuery : XQuery-Update support

let $OLDUSER := "EBATES"
let $NEWUSER := "SKING"
let $NEWNAME := "Stephen King"
let $OLDDOCS :=
for $DOC in fn:collection("oradb:/SCOTT/PURCHASEORDER")
where $DOC/PurchaseOrder/User = $OLDUSER
return $DOC
for $OLDDOC in $OLDDOCS
return copy $NEWDOC := $OLDDOC modify (
f or $PO in $NEWDOC/PurchaseOrder return (
replace value of node $PO/User with $NEWUSER,
replace value of node $PO/Requestor with $NEWNAME
)
)
return $NEWDOC

20

Executing XQuery in SQL*PLUS using XQUERY

SQL> XQUERY
2 let $USER := "SKING"
3 for $doc in fn:collection("oradb:/OE/PURCHASEORDER")
4
5
where $doc/PurchaseOrder[User = $USER]

6
order by $doc/PurchaseOrder/Reference

7 /

• If XQuery statement ends with ‘;’ use empty comment
(: :) to prevent semi-colon being interpreted by SQL.

21

Executing XQuery from SQL using XMLTable

select *
from XMLTABLE
(
'for $doc in fn:collection("oradb:/OE/PURCHASEORDER")

)
return $doc/PurchaseOrder/Reference'

• Converts the the sequence returned by XQuery into a
relational result set
• JDBC / OCI programs
• Tools that do not yet provide native XQuery support
– SQL*Developer, APEX SQL Workbench
• This is what the SQL*PLUS XQUERY command does
under the covers

22

XQUERY Service in Database Native Web Services

<ENV:Envelope
xmlns:ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<ENV:Body>
<m:query xmlns:m="http://xmlns.oracle.com/orawsv">
<m:query_text type="XQUERY">
for $doc in fn:collection("oradb:/OE/PURCHASEORDER")

</m:query_text>

<m:pretty_print>true</m:pretty_print>
</m:query>
</ENV:Body>
</ENV:Envelope>

• WSDL location : http://dbserver:port/orawsv?wsdl

23

JCR-225 or XQJ

import javax.xml.xquery.*

XQDataSource dataSource = new oracle.xml.xquery.OXQDataSource();
XQConnection connection = dataSource.getConnection();
XQExpression expression = connection.createExpression();

XQResultSequence result = expression.executeQuery
("for $doc in fn:collection("oradb:/OE/PURCHASEORDER")
return $doc/PurchaseOrder/Reference");

result.writeSequence(System.out, null);

result.close();

• Native XQuery API for Java
• XQJ is to XQuery what JDBC is to SQL
• Reference implementation by Oracle XMLDB

24

Oracle XML DB
Loading XML

25

Loading XML using SQL Loader

load data
infile 'filelist.dat'
append
into table PURCHASEORDER
xmltype(XMLDATA)
(
filename filler char(120),
XMLDATA lobfile(filename) terminated by eof
)

C:purchaseOrdersABANDA-20020405224101614PST.xml
C:purchaseOrdersABANDA-20020406224701221PDT.xml
…

• Load a set of files from a local file system
• Filelist.dat contains a list of the files to be loaded

26

Loading XML content using BFILE Constructor

create or replace directory XMLDIR as ‘c:myxmlfiles’;

insert into PURCHASEORDER values (
XMLTYPE (
BFILENAME(‘XMLDIR’, ‘SKING-20021009123335560PDT.xml’),
NLS_CHARSET_ID(‘AL32UTF8’)));

• Directory XMLDIR references a directory in a file
system local to the database server
• Must specify the character set encoding of the file
being loaded.

27

XMLType implementations in JDBC, OCI, PL/SQL

public boolean doInsert(String filename) throws SQLException,
FileNotFoundException {

String statementText = "insert into PURCHASEORDER values (:1)“;
Connection conn = getConnection();
OracleCallableStatement statement =
(OracleCallableStatement) conn.prepareStatement(statementText);

FileInputStream is = new FileInputStream(filename);
XMLType xml = XMLType.createXML(this.getConnection(),is);
statement.setObject(1,xml);
boolean result = statement.execute();

statement.close();
– Constuct an XMLType and bind it into an insert statement

conn.commit();
return result;
}

28

Loading XML content via the XML DB repository

• Use FTP, HTTP and WebDAV to load content directly
into XMLType tables in the Oracle Database

29

Oracle XML DB
XML Generation

30

Generating XML from relational data

• SQL/XML makes it easy to generate XML from
relational data
– Result set generated by SQL Query consists of one or more
XML documents
• XQuery enables template-based generation of XML
from relational tables
– fn:collection() generates a canonical XML representation of
relational data
• XMLType views enable persistentent XML centric
access to relational content

31

Generating XML using SQL/XML

• XMLElement()
– Generates an Element with simple or complex content
– Simple Content derived from a scalar column or constant
– Complex content created from XMLType columns or via
nested XMLElement and XMLAgg() operators
• XMLAttributes()
– Add attributes to an element
• XMLAgg()
– Turn a collection, typically from a nested sub-query, into a an
XMLType containing a fragment
– Similar to SQL aggregation operators

32

Example : Using SQL/XML

select xmlElement ( "Department", XML
xmlAttributes( d.DEPTNO as “Id"),
<Department Id="10">
xmlElement("Name", d.DNAME),
<Name>ACCOUNTING</Name>
xmlElement("Employees”, <Employees>
( select xmlAgg( <Employee employeeId="7782">
xmlElement("Employee", <Name>CLARK</Name>
xmlForest( <StartDate>1981-06-09</StartDate>
</Employee>
e.ENAME as "Name",
<Employee”>
e.HIREDATE s"StartDate”) <Name>KING</Name>
) <StartDate>1981-11-17</StartDate>
) </Employee>
from EMP e <Employee>
where e.DEPTNO = d.DEPTNO <Name>MILLER</Name>
) <StartDate>1982-01-23</StartDate>
) </Employee>
) as XML </Employees>
from DEPT d </Department>

33

Oracle XML DB
XML Operators

34

XQuery operators : XMLExists()

SQL> select OBJECT_VALUE “XML”
2 from PURCHASEORDER
3 where XMLEXISTS (
4 '$PO/PurchaseOrder[Reference=$REF]'
5 passing OBJECT_VALUE as "PO",
6 'SKING-20021009123336131PDT' as "REF"
7 );

<PurchaseOrder >
XML

<Reference>SKING-20021009123336131PDT</Reference>
…
</PurchaseOrder >

• Use in SQL where clause to filter rows based on an
XQuery expression
• Bind variables are supplied via the “Passing” clause

35

XQuery operators : XMLQuery()

SQL> select XMLQUERY(
2 '$PO/PurchaseOrder/ShippingInstructions'
3 passing OBJECT_VALUE as "PO"
4 returning content) XML
5 from PURCHASEORDER
6 where XMLEXISTS(
7 '$PO/PurchaseOrder[Reference=$REF]'
8 passing OBJECT_VALUE as "PO",
9 'SKING-20021009123336131PDT' as "REF");

<ShippingInstructions>
XML

<name>Steven A. King</name>
…
</ShippingInstructions>

• Use in SQL where clause to extract a fragment from
each document in a result set.
• Bind variables are supplied via the “Passing” clause

36

XMLTable Columns Clause

• Extends XMLTable , enabling the creation of in-line
relational views of XML content
• Enables SQL operations on XML content
– Views allow Non-XML aware tools access to XML content
• Manage collection hierarchies using Nested
XMLTable operators
– Pass collections as fragments

37

XMLTable Columns Clause
SQL> select m.REFERENCE, l.LINENO, l.QUANTITY
2 from PURCHASEORDER,
3 XMLTable(
4 '$PO/PurchaseOrder' passing OBJECT_VALUE as "PO"
5 COLUMNS
6 REFERENCE VARCHAR2(32) PATH 'Reference',',
7 LINEITEM_FRAGMENT XMLTYPE PATH 'LineItems/LineItem'
8 ) m,
9 XMLTable(
10 '$LI/LineItem' passing m.LINEITEM_FRAGMENT as "LI"
11 COLUMNS
12 LINENO NUMBER(4) PATH '@ItemNumber',
13 UPC NUMBER(14) PATH 'Part/text()',
14 QUANTITY NUMBER(5) PATH 'Quantity'
15 )l
16 where l.UPC = '24543000457’;

RERERENCE LINENO QUANTITY
AKHOO-20100418162507692PDT 2 2
PVARGAS-20101114171322653PST 1 7
JTAYLOR-20100518182653281PDT 5 4

38

Xquery Update Suppport

• Enabled starting with release 11.2.0.3.0
• Enables standards-compliant update of XML content
• Use XMQuery operator containing an XQuery-Update
expression in a SQL Update
– The Xquery produces the new value for an XMLType column
• Updating xml content supported using Oracle specific
operators in older releases
– UpdateXML(), DeleteXML(), insertChildXML() etc

39

Other SQL/XML Operators

• XMLCast()
– Convert XML scalars into SQL scalars
• XMLTransfom()
– XSL based transformation
• XMLNamespaces()
– Namespace management
• SchemaValidate()
– XMLType method for validating document against an XML
Schema

40

Oracle XML DB
XML Storage
And Indexing

41

Binary Persistence

SQL> create table PURCHASEORDER of XMLTYPE
2> XMLTYPE store as SECUREFILE BINARY XML;

• Stores post-parse representation of XML on disc
– Reduced storage requirements
– Tags are tokenized, content stored in native representation
• Optimized for streaming, indexing and fragment
extraction.
• Single representation used on disc, in-memory and
on-wire
– No parsing / serialization overhead once XML is ingested
• Partial update
• Schema-less and XML Schema aware versions

42

Oracle Binary XML

Database App Web Client
Server Cache

Binary XML Binary XML Binary XML

SQL, PL/SQL XQuery, XQuery,
XQuery Java, ‘C’ JAVA, ‘C’

Oracle Binary XML

43

XML Index : Unstructured Index

SQL> create index PURCHASEORDER_XML_IDX
2 on PURCHASEORDER (OBJECT_VALUE)
3 indextype is XDB.XMLINDEX;

• Requires no knowledge of the structure of the XML
being indexed or the search criteria
• All elements and attributes in the XML are indexed
– Name / Value pair model
• Optimizes searching and fragment extraction
• Accelerates path and path-with-predicate searching
• Supports type-aware searches
• Synchronous and Asynchronous indexing modes

44

XML Index : Unstructured Index – Path Sub-setting

3 indextype is XDB.XMLINDEX
4 parameters (
5 'paths (
6 include (
7 /PurchaseOrder/Reference
8 /PurchaseOrder/LineItems//* ))'
9 );

• Indexing all nodes can be expensive
– DML Performance
– Space Usage
• Path sub-setting allows control over which nodes indexed
• Enables trade off between retrieval performance, DML
performance and space usage

45

XML Index : Structured Index

3 indextype is XDB.XMLINDEX
4 parameters ('PARAM PO_SXI_PARAMETERS');

• Indexes “Islands of Structure”
– Requires some knowledge of the XML being index and the kind
of queries that will be performed
• Specific leaf-level nodes projected into relational tables
– Table for each island, leaf node values stored as columns
• Data type aware
• Based on XMLTable syntax()
• Optimzies all SQL/XML operators
– XMLQuery(), XMLTable() and XMLExists()

46

Table Based XML Parameters clause

SQL> call DBMS_XMLINDEX.registerParameter(
2 'PO_SXI_PARAMETERS',
3 'GROUP PO_LINEITEM
4 xmlTable PO_INDEX_MASTER ''/PurchaseOrder''
5 COLUMNS
6 REFERENCE varchar2(30) PATH ''Reference'',
7 LINEITEM xmlType PATH ''LineItems/LineItem''
8 VIRTUAL xmlTable PO_INDEX_LINEITEM ''/LineItem''
9 PASSING lineitem
10 COLUMNS
11 ITEMNO number(38) PATH ''@ItemNumber'',
12 UPC number(14) PATH “Part/text()”,
13 DESCRIPTION varchar2(256) PATH '‘Part/@Description''
14 ')

47

Oracle XML DB
XML Schema

49

XMLSchema

• WC3 Standard for defining the
structure and content of an XML
document
– An XML Schema is an XML document
• Used for validation purposes
– Parsers like Oracle XDK, XERCES or
Microsoft’s MSXML
– XML Editors like XMetal,. Oxygene or
Microsoft Word 2K7
• Created using tools like Altova’s
XML Spy or Oracle’s JDeveloper

50

XML Schema and Binary XML

DBMS_XMLSCHEMA.registerSchema (
SCHEMAURL => 'http://www.example.com/xsd/purchaseOrder.xsd',
SCHEMADOC => xmlType(bfilename(‘XMLDIR’,’po.xsd’),
nls_charset_id(‘AL32UTF8’)),
GENTYPES => FALSE,
GENTABLES => FALSE,
OPTIONS => DBMS_XMLSCHEMA.REGISTER_BINARYXML
)

• Increased storage efficiency for Binary XML
– Simple types mapped to native formats
– Pre-generated token tables
• Improves streaming XPath and XML Index operations
– Leverages cardinality and location information
• Schema validation part of Binary XML encoding process

51

XML Schema and Object-Relational Storage

DBMS_XMLSCHEMA.registerSchema (
SCHEMAURL => 'http://www.example.com/xsd/purchaseOrder.xsd',
SCHEMADOC => xmlType(bfilename(‘XMLDIR’,’po.xsd’),
nls_charset_id(‘AL32UTF8’)),
GENTYPES => TRUE,
GENTABLES => TRUE )

• XML Schema defines an XML object Model,
• XML Schema compilation
• SQL object model generated from the XML object model
• Object-relational tables created to provide efficient storage for
SQL objects.
• Object Relational storage enables
• Lossless, bi-directional mapping between XML object model
and SQL object model
• XQuery execution via re-write into SQL operations on the
underlying tables

52

Object Relational Persistence

• Suitable for highly structured XML use-cases
• XML collection hierarchy persisted as master/ details
relationships using nested tables
• Simple recursive structures handled automatically using out-
of-line tables
• Near-relational performance for
– Leaf level access and update
– Collection manipulation (insert,delete)
• Indexing via B-Tree and Bitmap indexes
• Significant reductions in storage Vs serialized form
• Some overhead incurred for document-level storage
and retrieval operations

53

Managing XML Schema Changes

• Schema Extension
– XML DB supports the use of extension schemas with both
Binary XML and Object-Relational Storage
• In-Place evolution
– Simple changes that do not invalidate existing documents
– XML Schema update takes a few seconds regardless of
amount of data.
• Copy-based evolution
– Supports arbitrary changes to the XML Schema
– Documents need to be transformed into format compliant with
the updated XML Schema
– Time taken proportional to volume of data

54

Oracle XML DB
XML DB
Repository

55

Oracle XML DB Repository

• Organize and access content as files in folders rather
than rows in tables
• Manages XML and non-XML content
• Native support for HTTP, FTP and WebDAV protocols
– Content accessible using standard desktop Tools
• Enables document centric development paradigm
– Path based access to content
– Queries based on location
• Hierarchical Index
– Patented, high performance folder-traversal operations and
queries

56

Oracle XML DB
Database
Native Web Services

60

Database-native Web Services

• ‘Zero-Development’, ‘Zero-Deployment’ solution for
publishing PL/SQL packages.
– Any package method, function or procedure can be accessed
as a SOAP end-point
• Leverages the Oracle XML DB HTTP Server
– No additional infrastructure required
• Automatic generation of WSDL
– URL to Package, Function or Procedure mapping scheme
• Uses XML DB infrastructure for processing request
and generating response
• Includes ‘SQL Query’ and ‘XQuery’ Services

61

Oracle XML DB
Summary

62

Advanced XML Capabilities

XML Application Document ad data
JDBC Centric Access
Files XMLType
.NET
XDK XML Native XQuery
Folders Schema
OCI Engine

SOAP ACLS XQuery XML and Full-Text
indexing
HTTP
Versioning SQL/XML Native storage for
FTP schema-based and
Metadata schema-less XML
XSLT
WebDav
Document XML views of
or Message Events relational Content
DOM

63 63

Simplified Development

select empx.*
from dept_xml dx, • Less code to write
xmltable(
XMLNamespaces • Less code to maintain
('http://www.oracle.com/dept.xsd' as
"d"), • Easier to learn
'./d:Department/d:Employee‘
passing value(dx) • Lower Cost without losing flexibility
columns
ename varchar2(4000) path
'd:EmpName',
Job varchar2(4000) path 'd:Job',
Salary number(38) path 'd:Salary',
HireDate date path 'd:HireDate'
) empx;

64

XML DB value propositions

• Fast and easy native XML application development
• Hybrid database
– SQL centric access to XML content
– XML centric access to relational content
• Multiple XML storage options allow tuning for optimal
application performance
– Application code is totally independent of storage model
– Optimized storage and indexing for structured and
unstructured XML
• XML DB repository enables document centric
integrity and security models

65

XML DB Customers

ETL and Publishing Structured XML Semi-Structured Document Centric
Persistance XML Persistance XML

66

For More Information

search.oracle.com

or
oracle.com

68

Developer & Fusion Middleware 1 | Mark Drake | An introduction to Oracle XML DB in Oracle database 11g Release 2.pdf

More Related Content

What's hot (20)

Similar to Developer & Fusion Middleware 1 | Mark Drake | An introduction to Oracle XML DB in Oracle database 11g Release 2.pdf (20)

More from InSync2011 (20)

Recently uploaded (20)

Developer & Fusion Middleware 1 | Mark Drake | An introduction to Oracle XML DB in Oracle database 11g Release 2.pdf