Search: in, Sigmod / VLDB, n/a

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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

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

Schema and Database Evolution in the O2 Object Database System

... 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

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

An interactive clustering-based approach to integrating source query interfaces on ...

... over the interfaces; (c) they all perform the integration in a blackbox-like fashion and the whole process has to be restarted from ... and (d) they often require laborious parameter tuning. In this paper, we propose an interactive, clustering-based approach to matching ...

Publication - cat - 04/16/2013 - 06:16 - 0 comments - 1 attachment

Concise and Expressive Mappings with +Spicy

... +Spicy integrates the computation of core solutions in the mapping generation process in a highly efficient way, based on a natural rewriting of the given mappings. ...

Publication - hartung - 04/16/2013 - 00:27 - 0 comments - 1 attachment