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Online, asynchronous schema change in F1

... 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

Updating Relational Databases through Object-Based Views

... manipulating object-based views on relational databases. In this paper, we present a scheme for handling update operations on view ...

Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments

PRIMA: Archiving and Querying Historical Data with Evolving Schemas

... Schema evolution poses serious challenges in historical data management. Traditionally the archival data has been (i) ... or (ii) maintained under the original schema version in which they firstly appeared, leading to a perfect archival quality, but to a ...

Publication - krlis1337 - 04/17/2013 - 07:27 - 0 comments - 0 attachments

Managing and querying transaction-time databases under schema evolution

... the challenge of managing the history of their databases in the face of intense database schema evolution . Our PRIMA system ... method for publishing the history of a relational database in XML, whereby the evolution of the schema and its underlying database are ...

Publication - krlis1337 - 04/17/2013 - 01:38 - 0 comments - 1 attachment

On lossless tranformation of databases schemes not necessarily satisfying universal instance assumption

... 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

Worry-free database upgrades: automated model-driven evolution of schemas and complex mappings

... application development lifecycle. The two primary schemas in an application, the client conceptual object model and the persistent ... automatic evolution of object-relational mapping artifacts in the Microsoft Entity Framework. When starting with a valid mapping between ...

Publication - cat - 04/16/2013 - 20:05 - 0 comments - 1 attachment

Incremental Reorganization Of Relational Databases

... The evolution of an information system is reflected in data modeling by database reorganization. Entity-Relationship (ER) ...

Publication - erhard - 04/16/2013 - 11:05 - 0 comments - 1 attachment

Scalable Architecture and Query Optimization for Transaction-time DBs with Evolving Schemas

... 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