Introduction to odbms

Chapter 24 Introduction to Object DBMSs Prepared by Ajay pashankar

Object Oriented DBMS History ,[object Object],[object Object],[object Object]

The weakness of RDBMSs ,[object Object],[object Object],[object Object]

The weakness of RDBMSs (cont) ,[object Object],[object Object],[object Object],[object Object]

New database applications ,[object Object],[object Object],[object Object],[object Object],[object Object]

New database applications (cont) ,[object Object],[object Object],[object Object],[object Object]

Why consider these new applications? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Object Oriented data Model ,[object Object],[object Object]

What is encapsulation? ,[object Object]

Other OOP concepts ,[object Object],[object Object]

Object Oriented data Model(cont) ,[object Object],[object Object],[object Object]

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

Objects (cont) ,[object Object],[object Object],[object Object],[object Object]

class timeSeries { /* variables */ List* entryList; /* list of elements */ time beginning; time ending; elementDescriptor elemDesc; /* element type descriptor */ /* messages */ elementDescriptor getElementType(); Tuple getFirstElement(); Tuple getLastElement(); Tuple getFirstElementAfter(time t); } Example Object class

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

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

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

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

Other Object Oriented techniques ,[object Object],[object Object],[object Object]

Persistent Programming Languages ,[object Object],[object Object]

Persistent Programming Languages (cont) ,[object Object],[object Object],[object Object]

Persistent Programming Languages (cont) ,[object Object],[object Object],[object Object],[object Object]

Making Objects Persistent ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Some OODBs Have Limited Query Capability ,[object Object],[object Object],[object Object],[object Object],[object Object]

Some OODBs Have Limited Query Capability (cont) ,[object Object],[object Object],[object Object]

Complex Objects ,[object Object]

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

Introduction to odbms

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Introduction to odbms