XMLDB Building Blocks And Best Practices - Oracle Open World 2008 - Marco Gralike

ORACLE XMLDB Building Blocks and Best Practices Marco Gralike – AMIS – OOW 2008

Who Am I ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Disclaimer ,[object Object],[object Object],[object Object],The following are “ Rules of Numb ” Every environment has its own unique criteria and needs… “ Testing” “ Performance” “ Maintainability” “ Extendibility”

Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Let’s presume it is Relational

Query Optimizer - Access Paths

Structured Data Unstructured (XML) Data

How to Containerize a Tree? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Impedance Mismatch ,[object Object],[object Object],[object Object],[object Object],Source: Wikipedia SXML

Issues in General ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

So the issues you will encounter with XML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

WORST PRACTICES ? ( A small Tom Kyte Intermezzo)

No Data Optimization and its Results…

Relational Fundamentals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Storing XML in Oracle XML Database ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Probably You Do Not Need to Actually Design Anything

Quickly Answer: ,[object Object],[object Object],OBJECT *object_id name owner created … ATTRIBUTES *attribute_id attribute_name attribute_type … OBJ_ATTR_VALUES *object_id *attribute_id attribute_name attribute_type … LINKS *object_id1 *object_id2 …

Quickly Answer: ,[object Object],[object Object],[object Object],Create table Object ( object_id number primary key, data xmltype );

Mr. Tom Kyte Has a Point Though… ,[object Object],[object Object]

Hidden Design Opportunities ,[object Object],[object Object],Create table Object ( data xmltype );

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ Hidden” Oracle Design Features XML Schema: your container for Logical and Physical Design Physical Design

What should you take into account? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Logical XML Schema Design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Source: xfront.com (http://www.xfront.com/globalversuslocal.html)

Controle over Schemata ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

XDB Annotations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mixing Logical and Physical Design

Generate or Manual Creation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Creating Storage Structures (OR) SQL> BEGIN DBMS_XMLSCHEMA.registerSchema (SCHEMAURL => 'http://www.myserver.com/root.xsd', SCHEMADOC => xdbURIType('/public/root.xsd').getClob(), LOCAL => TRUE, -- local GENTYPES => TRUE, -- generate object types GENBEAN => FALSE, -- no java beans GENTABLES => TRUE, -- generate object tables OWNER => USER); END; /

Result - Object Relational Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Creating Storage Structures (Binary) SQL> BEGIN DBMS_XMLSCHEMA.registerSchema (SCHEMAURL => 'http://www.myserver.com/root.xsd', SCHEMADOC => xdbURIType('/public/root.xsd').getClob(), LOCAL => TRUE, -- local GENTYPES => FALSE, -- generate object types GENBEAN => FALSE, -- no java beans GENTABLES => TRUE, -- generate object tables OPTIONS => DBMS_XMLSCHEMA.REGISTER_BINARYXML , OWNER => USER); END; /

Result - Binary XML Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],XML Validation Mutually Exclusive ,[object Object],[object Object],[object Object]

Syntax Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],B.6396229

CLOB, Object Relational, Binary XML XMLType (Tables) XMLType Views XMLDB Data Storage (Object) Relational Objects Relational Tables Relational World XMLDB World Binary XML Structured Mixed complex[y] BINARY XSD [y/n] XMLIndex Content complex[n] OR XSD [y] BTree, IOT Hybrid Content complex[n] Mixed XSD [y] BTree, IOT Unstructured Document na CLOB XSD [n] XMLIndex

Some XML Storage Issues (*) 11g - XML Schema - “preserve space” - - + BTree / IOT + + + Function / Text + + - XMLIndex + - ++ Memory Management ++ + - Throughput + - ++ XPath Performance + - ++ DML - (*) + - (*) Whitespace ++ - + Schema Based Binary XML CLOB O.R.

XMLIndex to the Rescue ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Path Table XMLIndex XML Information

XMLINDEX index ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],PATH_TABLE RID RowID locator RAW value varchar2 (4000) pathID RAW order key RAW

XMLIndex Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Object Relational Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

XML Equi Partitioning by Reference

Equi Partitioning of Table PART_DEMO EMP_PROJ_P11 reference_id EMPLOYEES_PROJ_TAB “ employees”.”employee” EMP_PROJ_P12 PROJ_DETAILS_TAB

Equi Partitioning XML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],B.6364855

Binary XML Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

XML Binary Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],B.6364855

Recap… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Oracle Open World 2008 - XMLDB Sessions

References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions? ,[object Object],[object Object]

XMLDB Building Blocks And Best Practices - Oracle Open World 2008 - Marco Gralike

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XMLDB Building Blocks And Best Practices - Oracle Open World 2008 - Marco Gralike