Normalisation of database expressions involving calculations
Publication date
1989-03
Authors
Denneheuvel, S. van
Renardel de Lavalette, G.R.
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Document Type
Preprint
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Abstract
In this paper we introduce a relational algebra extended with a calculate operator
and derive, for expressions in the corresponding language PCSJL, a
normalisation procedure. PCSJL plays a role in the implementation of the
Rule Language RL; the normalisation is to be used for query optimisation.
Keywords
relational data base, relational algebra, query optimisation, normalisation