PPT Slide

• Reference values in tables should have a scope

  • "Other end" info for query rewrite and join optimization
  • Ditto for authorization checking (static vs. dynamic)
  • Schema makes overly wide references unnecessary
  • Uniqueness is hierarchy-relative, enforced with an index

• V5.2 self-references (object ids) are user-generated

  • CAD/CAM vendor had "legacy references" in files
  • Different users have different id generation schemes
  • Loading cyclic data (e.g., emp<-> dept) is messy and slow
  • Ditto for creating objects from an object cache

References and Path Expressions

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