S.Chaudhuri and K.Shim, Including group-by in query optimisation, Proc. 20th VLDB Conference, Santiago, September 1994, pp 354-366. Home/Search Document Not in Database Summary Related Articles Check |
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Formal foundations for optimising aggregation functions in .. - Poulovassilis, Small (1997) (2 citations) (Correct)
....OE=3. Steenhagen et al. 15] use the following instance of fm=2 to replace the nested selection expression on the RHS by the nestjoin expression on the LHS: f x j (x; ys) x; g x y j y s 0 ; q x y] j x s] p x ys] f x j x s; p x [g x y j y s 0 ; q x y] Chaudhuri and Shim [6] investigate the optimisation of queries containing group and compute operations. They give three equivalences: ag=53, eq=1 below which introduces eliminates a redundant group and compute operation, and eq=2 below which allows a group of tuples to be coalesced into a single tuple together with a ....
S.Chaudhuri and K.Shim, Including group-by in query optimisation, Proc. 20th VLDB Conference, Santiago, September 1994, pp 354-366.
Algebraic Query Optimisation for Database Programming Languages - Poulovassilis, Small (1996) (3 citations) (Correct)
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Chaudhuri, S. and Shim, K. Including group-by in query optimisation, Proc. 20th VLDB, Santiago, September 1994, pp 354-366.
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