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Software Systems 2
Content
The lecture is to introduce complex software systems
that require modularization and layers with abstraction.
It does so using database systems as an example.
The emphasis therefore is on technological aspects of database systems.
The storage of data on non-volatile storage
serves as a starting point
for a sequence of abstractions
which are defined on top of each other.
The first abstraction is the file.
Then records are introduced
and organized in blocks in different ways
(sequentially, with direct access, index-sequentially).
As a second major abstraction,
data models are introduced,
especially the relational data model.
That includes structures
as well as query languages like SQL.
In the second part of the lecture
these structures are used
to create database applications.
To do that, a database schema must be defined,
and this schema should have specific properties
not to inhibit the later development of applications
that work with it.
Access to the database by the applications is also considered,
using interfaces like ODBC
and embedded SQL.
The part concludes
with the concept of transaction
as a database service
that simplifies programming.
The programmer need not take into account
neither the repair of data after failures
nor concurrent accesses to data.
The third part
deals with the implementation
of all these services,
using the previously discussed records
and access paths.
This includes query processing and optimization,
but also mechanisms to log actions
and to recover data after failures.
A layered architecture
for database management systems
finally comprises all the tasks.
The goal of the lecture thus is
to create a fundamental understanding
of the structure and functionality
of a particular software system,
namely a database system.
Literature
| Heue03a |
HEUER, Andreas ;
SAAKE, Gunter ;
SATTLER, Kai-Uwe:
Datenbanken kompakt.
2. Aufl.
Bonn : mitp, 2003. - ISBN 3-8266-0987-5
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| Kemp06a |
KEMPER, Alfons ;
EICKLER, André:
Datenbanksysteme : Eine Einführung.
6., aktual. u. erw. Aufl.
München ; Wien : Oldenbourg, 2006. - ISBN 3-486-57690-9
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| Kemp06b |
KEMPER, Alfons ;
WIMMER, Martin:
Übungsbuch Datenbanksysteme.
München ; Wien : Oldenbourg, 2006. - ISBN 3-486-57967-3
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| Heue07a |
HEUER, Andreas ;
SAAKE, Gunter:
Datenbanken : Konzepte und Sprachen.
3., aktual. u. erw. Aufl.
Bonn : mitp, 2007. - ISBN 3-8266-1664-2
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| Haer99a |
HÄRDER, Theo ;
RAHM, Erhard:
Datenbanksysteme :
Konzepte und Techniken der Implementierung.
Berlin : Springer, 1999 - ISBN 3-540-65040-7
This book and the associated lecture
have been the prime source for SoS2.
Thanks to Prof. Härder
for the extensive suppport!
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| Saak05a |
SAAKE, Gunter ;
HEUER, Andreas:
Datenbanken : Implementierungstechniken.
2., aktual. u. erw. Aufl.
Bonn : mitp, 2005. - ISBN 3-8266-1438-0
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Target audience
Students of
- Computer Science,
- Business Computing,
- Computational Engineering (Bachelor),
- Computational Linguistics,
- and other curriculae
Further information
- Time:
winter semester (WS)
- Language:
German
- Hours per week (SWS):
3
- Credit points (ECTS):
3.5
- Examination:
written
- Contact:
Prof. Dr. Klaus Meyer-Wegener
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