Database states and their tableaux

Consider determining whether the join of n relations with relation schemas ${\mathbf{R}}_1,\dots ,{\mathbf{R}}_n$ is non-empty. Abstracting the essence of many query processors, we may form new m intermediate relations, with relation schema ${\mathbf{S}}_1,\dots ,{\mathbf{S}}_m$, then repeatedly use in-place ...${\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}$${\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}{\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}$${\mathbf{}}_{}$${\mathbf{}}_{}$$\mathrm{}$$\mathrm{}$${\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}$${\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}$${\mathbf{}}_{\mathrm{}}{\mathbf{}}_{}$

In this paper, we investigate states and internal states on bounded semihoops. First, we introduce Bosbach states and Rieăźan states on bounded semihoops. We derive that Bosbach states are Rieăźan states on bounded semihoops, while the converse is not ...

In this article, we characterize in terms of analytic tableaux the repairs of inconsistent relational databases, that is databases that do not satisfy a given set of integrity constraints. For this purpose we provide closing and opening criteria for ...