Download Database Schema Evolution and Meta-Modeling: 9th by Can Türker (auth.), Herman Balsters, Bert de Brock, Stefan PDF

By Can Türker (auth.), Herman Balsters, Bert de Brock, Stefan Conrad (eds.)

The 9th foreign Workshop on Foundations of versions and Languages for facts and gadgets (FoMLaDO) came about in Dagstuhl Germany, Sept- ber 18{21, 2000. the subject of this workshop used to be Database schema Evolution and Meta-Modeling; this FoMLaDO Workshop used to be consequently assigned the acronym DEMM 2000. those post-proceedings comprise the revised models of the permitted papers of the DEMM 2000 workshop. Twelve typical papers have been approved for inclusion within the court cases. The papers handle the next matters: { Consistency of evolving concurrent details platforms { Adaptive speci cations of technical details structures { switch propagation in schema evolution of object-based structures { Evolving software program of a schema evolution procedure { Logical characterization of schema evolution { Con?ict administration in built-in databases { Evolving relation schemas { Conceptual descriptions of adaptive info structures { OQL-extensions for metadata entry { Metamodeling of schema evolution { Metrics for conceptual schema evolution { Incremental datawarehouse development as well as the average papers, there's an invited paper via Can Turk ¨ er on schema evolution in SQL99 and (object-)relational databases. Acknowledgements: we want to thank this system committee contributors for his or her paintings on reviewing the submitted papers. We additionally desire to thank all a- hors for filing papers to this workshop. in addition, all individuals of the workshop are thanked for contributing to vigorous discussions. thank you additionally to Elke Rundensteiner, who introduced an invited speak at the SERF-project referring to ?exible database transformations.

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Additional resources for Database Schema Evolution and Meta-Modeling: 9th International Workshop on Foundations of Models and Languages for Data and Objects FoMLaDO/DEMM 2000 Dagstuhl Castle, Germany, September 18–21, 2000 Selected Papers

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02 ∗ B) ) Read-arc-Tokens1 : hW DR : i|(ACN T , ICw1) ⊗ (W DR, ICw2), (ACN T , CT w), T Cw Read-arc-Tokens2 : IN T R : i|(ACN T , ICi1) ⊗ (IN T R, ICi2), (ACN T , CT i), T Ci Fig. 5. Runtime modification of the Account example using the Co-nets extension operator denoted r is proposed for separating read-arc inscriptions from the other place-tokens pairs. This operator is necessary because we should distinguish between tokens from the meta-level and those from the object level. This rule is considered as a non-instantiated rewrite rule, denoted tnins , because it cannot be applied directly.

This option is supported in MSSQL, Sybase, and Ingres. 7 Constraints Although constraints are part of a table definition, we discuss their evolution separately and in more detail due to their importance. As mentioned before, new constraints can be added to a table and existing ones removed from a table. In addition, and in contrast to SQL-99, the checking of constraints can be enabled and disabled in some of the reference systems. These issues can even be combined. For instance, a constraint can be added to a table in the disabled mode or a disabled constraint can be enabled but without verifying it against the current content of the corresponding table.

Thirdly, it is crucial to mention that each synchronization rule will now play the role of the semantics of the corresponding method. That is, in this example the described rewrite rules in section 2 for WDR, Consistency Management 47 DEP and INTR have to be synchronized with the corresponding rules associated with constraint transitions. , ym )]⊗ | ∈ Rconst Their synchronization, denoted by t1 t2 where {xi /yi } , is defined by: i [w1 ] ⇒ [w1 ] . . [wn ] ⇒ [wn ] . . [z1 ] ⇒ [z1 ] . . [zm ] ⇒ [zm ] − − − − − |[b1 (w/x)]⊗ | ⇒ |[b2 (w /x)]⊗ | ∧ |[b3 ( z / y )]⊗ | ⇒ |[b4 (z / y )]⊗ | ∧ − − Remark 2.

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