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Query optimization example

  • Process in order of increasing freq:

    • start with smallest set, then keep cutting further.

                                              ↑

      (This is why we kept document freq. in dictionary)

Brutus→248163264 128 
Caesar →123 5 816 2134
Calpurnia →1316  

 


              Execute the query as (Calpurnia AND Brutus) AND Caesar.


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