Impedance mismatch

Impedance mismatch

• Two different languages and type systems QL/PL
• Approaches:
  • query download
    • “batch model”
  • database representation
    • operate on data in DB
  • BLOBs
    • DB advantages lost

• Procedural database language
  • write all/most of application in DB query language
  • lack of resource completeness
• Extended programming data types
  • relations as PL constructs
• Persistent programming languages
  • data transparently persistent

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