pax

Publication type:

inproceedings

Authors:

Peter Sune Jorgensen, Michael Böhlen

Abstract:

We introduce the versioned relational data model, which allows a user to apply conditional schema changes to a populated database without breaking applications compiled against an existing schema, and without loss of existing data. Our model is based on keeping a history of conditional schema changes, and converting tuples on demand to ﬁt the correct schema in any schema version. We provide a concrete deﬁnition of schema versioning: The ability to specify an operator on any schema version, such that the tuples in the result are unaffected by schema versions created after the speciﬁed schema version. Finally, we show that our model supports schema versioning.

Title:

Versioned Relations: Support for Conditional Schema Changes and Schema Versioning

Year:

2007

booktitle:

DASFAA 2007: Support for Conditional Schema Changes and Schema Versioning; Lecture Notes in Computer Science Volume 4443/2008 page 1058-1061, ISBN 978-3-540-71702-7

pages:

1058-1061

ee:

http://dx.doi.org/10.1007/978-3-540-71703-4_104

crossref:

DBLP:conf/dasfaa/2007

bibsource:

DBLP, http://dblp.uni-trier.de

group:

dbtg

Versioned Relations: Support for Conditional Schema Changes...

Versioned Relations: Support for Conditional Schema Changes and Schema Versioning

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