... even altogether schema-free. They allow to store datasets in different structural versions to co-exist. Yet even when the database ... about the structure of the stored data. For instance, in Figure 1, the Java code in lines 1 through 9 implies a schema: An entity for ...
Publication - cat - 04/17/2022 - 19:15 - 0 comments - 0 attachments
... We introduce a protocol for schema evolution in a globally distributed database management system with shared data, ... Our protocol is asynchronous--it allows different servers in the database system to transition to a new schema at different times--and ...
Publication - cat - 10/24/2013 - 14:57 - 0 comments - 0 attachments
... ETL architect needs to design and improve an ETL design in a way that satisfies both performance and correctness guarantees and often, she has to choose among various alternative designs. In this paper, we focus on ways to predict the maintenance effort of ETL ...
Publication - pvassil - 04/25/2013 - 08:40 - 0 comments - 0 attachments
Authors: Mullins, C.S. Author: Mullins, C Year: ...
Publication - cat - 04/17/2013 - 13:16 - 0 comments - 0 attachments
... Generative and Transformational Techniques in Software Engineering, Lecture Notes in Computer Science 4143, 2006 URL: ...
Publication - acleve - 04/17/2013 - 11:38 - 0 comments - 1 attachment
... (or view). However, existing support is lacking in two ways. First, change primitives as presented in literature are very limiting in terms of their capabilities allowing users ...
Publication - cat - 04/17/2013 - 06:38 - 0 comments - 0 attachments
... provide high level quality of data and quality of service. In the DWQ project we have proposed an architectural framework and a repository ... metadata which describes all the data warehouse components in a set of metamodels to which is added a quality metamodel, defining for each ...
Publication - cat - 04/17/2013 - 05:27 - 0 comments - 1 attachment
... using the pre-upgrade application, it can be retired. In other words, the application as a whole enjoys hot rollover from the ...
Publication - cat - 04/17/2013 - 03:38 - 0 comments - 1 attachment
... to the original one. This question was addressed in the literature with respect to those relational schemes that satisfy the so ... \"tractable\" We are able to test losslessness defined in such a way for a wide class of relational expressions and dependencies. An ...
Publication - huliganka - 04/17/2013 - 00:27 - 0 comments - 1 attachment
... because the cost of outage for corporations involved in e-commerce can easily reach millions of dollars per hour. Today, it is ...
Publication - cat - 04/16/2013 - 18:49 - 0 comments - 1 attachment
... parts of a given data collection play an important role in many database applications. In dynamic environments where data is updated, not only information provided by ...
Publication - cat - 04/16/2013 - 18:16 - 0 comments - 1 attachment
... an SQL extension capable of handling schema evolution in relational database systems. (no paper type, relational, Sigmod Record) ...
Publication - cat - 04/16/2013 - 16:16 - 0 comments - 1 attachment
... Advances in Databases and ... URL: ... that makes use of database views. By using views, changes in the structure of the database schema can be delayed until absolutely ...
Publication - jlloret - 04/16/2013 - 15:05 - 0 comments - 0 attachments
... UML and XML are two of the most commonly used languages in software engineering processes. One of the most critical of these processes ... are incrementally updated according to the changes in the conceptual model (expressed as a UML class model). In this framework, we ...
Publication - jlloret - 04/16/2013 - 15:05 - 0 comments - 0 attachments
... system is modified, the database needs to be changed in such a way that the schema and the database remain consistent with each other. This paper describes the algorithm implemented in the new forthcoming release of the O2 object database for automatically ...
Publication - cat - 04/16/2013 - 11:27 - 0 comments - 1 attachment
... schema is defined and the problems which need to be solved in order to obtain a usable schema update mechanism are shown. The distinction ... and behavioral consistency for the O2 system is described in some detail and it is demonstrated how updates could be performed by ...
Publication - cat - 04/16/2013 - 08:16 - 0 comments - 0 attachments
... causes major usability and scalability problems in preservation,retrieval and querying of databases with intense evolution ... hundreds of schema versions.This scenarios are common in web information systems and scientific databases that frequently accumulate ...
Publication - krlis1337 - 04/16/2013 - 08:05 - 0 comments - 0 attachments
