Search: in, Schema Evolution, 1993

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Schema evolution in OODBs using class versioning

... out on a model for the versioning of class definitions in an object-oriented database. By defining update and backdate functions on ... an old version of the schema to still use data created in the format of the changed schema. (no paper type, object-oriented, ...

Publication - cat - 04/17/2013 - 12:38 - 0 comments - 1 attachment

Quantifying Schema Evolution

... Achieving correct changes is the dominant activity in the application software industry. Modification of database schemata is ... of a large-scale database application currently running in several hospitals in the UK are presented and interpreted. The kind of ...

Publication - cat - 04/17/2013 - 10:27 - 0 comments - 0 attachments

Schema Transformation Techniques for Database Reverse Engineering

... DBRE is proposed as a two-phase process consisting in recovering the DBMSdependent data structures (data structure extraction) then in recovering their semantics (data structure conceptualization). The second ...

Publication - cat - 04/17/2013 - 09:38 - 0 comments - 1 attachment

Object-Oriented Software Evolution

... keep the programs flexible and short, they are described in terms of propagation patterns. Each phase of an evolution history is tested in small steps that are constrained by class dictionary graphs belonging to a ...

Publication - erhard - 04/17/2013 - 08:49 - 0 comments - 0 attachments

Schema Transformation without Database Reorganization

... database reorganizations due to schema modification in object-oriented systems, since these are expensive operations and they ... show that data independence, which is a neglected concept in object databases, helps to avoid reorganizations in case of capacity ...

Publication - cat - 04/17/2013 - 07:05 - 0 comments - 0 attachments

A model for schema evolution in temporal relational databases

... CompEuro93; Computers in Design URL:  ... transaction time and valid time are added to the data. In this context, the modification of the schema which a database management ...

Publication - cat - 04/17/2013 - 06:49 - 0 comments - 0 attachments

A Taxonomy for Schema Versioning Based on the Relational and Entity Relationship Models

... Recently there has been increasing interest in both the problems and the potential of accommodating evolving schema in databases, especially in systems which necessitate a high volume of ...

Publication - cat - 04/17/2013 - 05:05 - 0 comments - 0 attachments

A Procedural Approach to Schema Evolution

... If not performed with care, updates can cause problems. In this paper, we present a procedure which safely adds a fact type to a ...

Publication - cat - 04/15/2013 - 21:38 - 0 comments - 1 attachment