DGlossary
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data protection (privacy)
Protection against unauthorized access to data. Implemented in UDS/SQL by
means of the schema/subschema concept and access autho rization. Access
rights are granted by means of the BPRIVACY utility routine.
database (DB)
Related data resources that are evaluated, processed and administered with
the help of a database system.
A database is identified by the database name.
An UDS/SQL database consists of the user database and the compiler database.
To prevent the loss of data, a shadow database may be operated together with
(i.e. parallel to) the original database.
database administrator
Person who manages and controls database operation. The DB administrator is
responsible for the utility routines and the Database Administrator Lang uage
(DAL).
database copy
Copy of a consistent database; may be taken at a freely selectable point in time.
database compiler realm (DBCOM)
Stores information on the realms, records and sets defined by the user in the
Schema DDL and Subschema DDL.
database copy update
Updating of a database copy to the status of a checkpoint by applying the appro-
priate after-images.
database directory (DBDIR)
Contains, among other things, the SIA, all the SSIAs and information on access
rights.
database job variable
Job variable in which UDS/SQL stores information on the status of a database.
database key (DB key)
Key whose value represents a unique identifier of a record in the database. It
consists of the record reference number and the record sequence number. The
database key values are either defined by the database programmer or
automatically assigned by UDS/SQL.