Managing schema evolution in a container-based persistent system
نویسندگان
چکیده
A persistent system is a system in which data structures and data itself persist through executions of any process, as shown in reference 1. Under an object-oriented paradigm, the entities we need to make persistent are classes and objects, as explained in reference 2, and even compiled functions in some systems such as Barbados. A class is probably going to be changed many times along the software life cycle, due to software
منابع مشابه
Architecture for Dynamic Schema Evolution in Heterogeneous Database Environments: A Prototype System and Its Evaluation
Dynamic schema evolution is the process of evolving a database schema by incorporating changes in a timely manner, without loss of existing data, and without significantly affecting the day-to-day operations of the database. Systems that manage schema evolution are described in the literature, but address schema evolution single, stand-alone, object-oriented databases. Organizations typically u...
متن کاملDynamically Managing Schema Changes in a HDE – Pitfalls and Possibilities
The schema of a database changes and evolves extensively even in an operational database. Managing schema evolution is an important problem in databases and the large body of literature reflects the extensive work on this topic. Managing schema evolution in a heterogeneous data environment (HDE) has however not been addressed at all. Further more automating schema evolution has received little ...
متن کاملAn Architecture for Managing Database Evolution
This paper presents an architecture for managing database evolution when all the components of the database (conceptual schema, logical schema and extension) are available. The strategy of evolution in which our architecture is based is that of ‘forward database maintenance’, that is, changes are applied to the conceptual schema and propagated automatically down to the logical schema and to the...
متن کاملAn Architecture for Managing Schema Evolution in a Federated Spatial Database System
A Federated Spatial Database System (FSDBS) is the integration of multiple spatial data sources and the realisation of effective spatial data sharing. FSDBS environments are becoming increasingly popular as more and more spatial and non-spatial datasets are integrated, especially those across a number of independent organisations. However, in a FSDBS environment, database schemas are subject to...
متن کاملHow to integrate Schema Evolution into the Persistent Garbage Collection
Schema evolution is a very important functionality in object-oriented database systems, because persistent objects can exist for a long time, but in this time the environment may change. Therefore adapting objects is often necessary. In most cases it is enough to change the values of some attributes, but sometimes also the types of the objects have to be modified, for example, when attributes h...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Softw., Pract. Exper.
دوره 32 شماره
صفحات -
تاریخ انتشار 2002