| C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Trans. on Database Systems, 22(1):43--73, Marc 1997. |
....and Semantic Optimization Related Work Within the intermediate query representations, there are a lot of opportunities for syntactic calculus or algebraic transformations. A lot of experience has been gained applying these optimizations in the relational or object oriented context [CS96, Cha98, GLR97, Hel98, Ioa96, KPH98, PS96, PS97, RS93, SdBB96, SO95a, SO95b, WM99] This thesis focuses on semantic query optimization, i.e. query transformations based on semantic knowledge rather than syntactic equivalence. In particular, semantic knowledge is represented by association rules of the ....
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Transactions on Database Systems, 22(1):43--74, March 1997.
....eliminate the other differences. We conclude this introduction with a brief look at related research. There has been considerable work on the incorporation of nulls into implementations of standard data models. For example outer joins and their optimization for query processing are considered in [22] and [23] More theoretical treatments involving extensions to the relational model include [19] which introduces the probabilistic relational model and [33] which extends the relational model to incorporate maybe information . Probably the most theoretical treatment of partial 2 information ....
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM TODS, 22, 1997.
No context found.
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Trans. on Database Systems, 22(1):43--73, Marc 1997.
No context found.
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Trans. on Database Systems, 22(1):43--73, Marc 1997.
No context found.
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Trans. on Database Systems, 22(1):43--73, Marc 1997.
No context found.
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Trans. on Database Systems, 22(1):43--73, Marc 1997.
No context found.
C. Galindo-Legaria and A. Rosenthal. Outerjoin simplification and reordering for query optimization. ACM Transactions on Database Systems, 22(1):43--73, March 1997.
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