COMPLEX OBJECTS

• OBJECT'S ATTRIBUTES VALUES CAN BE OTHER OBJECTS - SUCH VALUES CAN BE STORED IN ONE OF TWO WAYS:
  
  
  • OID OF SUBOBJECT STORED AS AN ATTRIBUTE OF OBJECT
    
    
    • NORMALIZED: LISTS OR GRAPHS STRUCTURES - DISK PERFORMANCE RISK
    
    
  • UNNORMALIZED: WHOLE SUBOBJECT STORED AS OBJECT'S ATTRIBUTE
    
    
    • BEST FOR FREQUENT WHOLE OBJECT ACCESS
    
    
  
  

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Ugo O. Gagliardi
GSD-6306 Spring 2003-2004