... range: n/a DB2 V8 begins the process of making it easier to ... schema evolution\". For example, as of V8, you can change a CHAR column to a larger size simply using ALTER. The remainder of this ...
Publication - cat - 04/17/2013 - 13:16 - 0 comments - 0 attachments
... on existing evolution support schemes and introduces a more general and functional mechanism to support schema evolution andinstance ... compatibility for old applications, while permitting a wider range of evolution operations. It achieves this by supporting schema ...
Publication - cat - 04/17/2013 - 12:38 - 0 comments - 1 attachment
... to database schemas, to data and to programs through a general strategy. This strategy requires the documentation of database ... techniques. Our approach, called DB-MAIN, relies on a generic database model and on transformational paradigm that states that ... can be modeled by schema transformations. Indeed, a transformation provides both structural and instance mappings that formally ...
Publication - huliganka - 04/17/2013 - 11:38 - 0 comments - 1 attachment
... for database applications. The paper presents a method for measuring modifications to database schemata and their consequences, by using a thesaurus tool. Measurements of the evolution of a large-scale database application currently running in several hospitals in ...
Publication - cat - 04/17/2013 - 10:27 - 0 comments - 0 attachments
... 10 - 49 In this paper we present a formal model for the support of temporal schema versions in object-oriented databases. Its definition is partially based on a generic (ODMG compatible) object model and partially introduces new concepts. ...
Publication - fgrandi - 04/17/2013 - 08:49 - 0 comments - 0 attachments
... to support both aspects of transaction time, evolution of a database's contents and evolution of a database's schema. They define a relation's schema to be the relation's ...
Publication - erhard - 04/17/2013 - 08:27 - 0 comments - 0 attachments
... 100 - 499 When a database is shared by many users, updates to the database schema are almost always prohibited because there is a risk of making existing application programs obsolete when they run against ...
Publication - cat - 04/17/2013 - 06:38 - 0 comments - 0 attachments
... Rundensteiner, Elke A.; Koeller, Andreas; Zhang, Xin ... E Koeller, A Zhang, X ...
Publication - cat - 04/17/2013 - 06:16 - 0 comments - 1 attachment
... Marotta, A; Motz, R; Ruggia, R Author: Marotta, A Motz, R ...
Publication - cat - 04/17/2013 - 05:27 - 0 comments - 0 attachments
... range: n/a Attachment Size ... 479.79 KB As a decision support information system, a data warehouse must provide high level quality of data and quality of ...
Publication - cat - 04/17/2013 - 05:27 - 0 comments - 1 attachment
... they seldom support automatic propagation mechanisms. A proposal is described that enables Sherpa to fully support the propagation of ... It extends previous classification mechanisms with a dynamic capability which adequately supports evolving class definitions and ...
Publication - cat - 04/16/2013 - 18:49 - 0 comments - 1 attachment
... and/or physically. An example is changing from toone to a one-to-many relationship. Reorganizatmn m a necessary function system. This paper introduces the basic concepts of ...
Publication - cat - 04/16/2013 - 17:49 - 0 comments - 1 attachment
... J Rubio, A Zapata, M ... work is the evolution of working database systems. As a step for the solution of this problem in this paper we propose MeDEA, which ...
Publication - jlloret - 04/16/2013 - 14:49 - 0 comments - 0 attachments
... P Kosky, A Year: ... their strengths and weaknessesd develops requirements on a formal model for specifying and implementing database transformations. We ...
Publication - erhard - 04/16/2013 - 11:38 - 0 comments - 1 attachment
... entire schema does not need to be redesigned every time a change is made. We characterize the subschema affected by basic schema ... allows us to limit the scope of checking required and have a guarantee of the overall design being correct (safe changes). In addition, we ...
Publication - cat - 04/16/2013 - 05:27 - 0 comments - 0 attachments
... 499 Schema versioning is one of a number of related areas dealing with the same general problem - that of ... structure. Schema versioning and schema evolution offer a solution to the problem by enabling intelligent handling of any temporal ...
Publication - cat - 04/16/2013 - 04:49 - 0 comments - 0 attachments
... Lee, AJ; Nica, A; Rundensteiner, EA Author: Lee, A Nica, A ...
Publication - cat - 04/16/2013 - 02:27 - 0 comments - 0 attachments
... multiple copies of object descriptions have to coexist in a single database. A scheme is proposed that enables users to explicitly deal with these object ...
Publication - cat - 04/15/2013 - 22:49 - 0 comments - 0 attachments
