Why PSWEEP is Better than SWEEP?

• V=IS1.R1 IS2.R2 IS3.R3

• Data Updates:

  • ?DU1 from IS1.R1
  • ?DU2 from IS2.R2
  • ?DU3 from IS3.R3

• Data Warehouse Effects:

  • ?V1=QR2, Q2=QR1 IS3.R3, Q1=?DU1 IS2.R2
  • ?V2=QR4, Q4=QR3 IS3.R3, Q3=IS1.R1’ ?DU2
  • ?V3=QR6, Q6=QR5 ?DU3, Q5=IS1.R1’ IS2.R2’

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