IBM DB2 Manual page 539

cursor sensitivity
The degree to which database updates are
visible to the subsequent FETCH
statements in a cursor.
cursor stability (CS)
The isolation level that provides
maximum concurrency without the ability
to read uncommitted data. With cursor
stability, a unit of work holds locks only
on its uncommitted changes and on the
current row of each of its cursors. See also
read stability, repeatable read, and
uncommitted read.
cursor table (CT)
| The internal representation of a cursor.
cycle A set of tables that can be ordered so that
each table is a descendent of the one
before it, and the first table is a
descendent of the last table. A
self-referencing table is a cycle with a
single member. See also referential cycle.
database
A collection of tables, or a collection of
table spaces and index spaces.
database access thread (DBAT)
A thread that accesses data at the local
subsystem on behalf of a remote
subsystem.
database administrator (DBA)
An individual who is responsible for
designing, developing, operating,
safeguarding, maintaining, and using a
database.
database alias
The name of the target server if it is
different from the location name. The
database alias is used to provide the
name of the database server as it is
known to the network.
database descriptor (DBD)
An internal representation of a DB2
database definition, which reflects the
data definition that is in the DB2 catalog.
The objects that are defined in a database
descriptor are table spaces, tables,
indexes, index spaces, relationships, check
constraints, and triggers. A DBD also
contains information about accessing
tables in the database.
database exception status
In a data sharing environment, an
indication that something is wrong with a
database.
database identifier (DBID)
An internal identifier of the database.
database management system (DBMS)
A software system that controls the
creation, organization, and modification of
a database and the access to the data that
is stored within it.
database request module (DBRM)
A data set member that is created by the
DB2 precompiler and that contains
information about SQL statements.
DBRMs are used in the bind process.
database server
The target of a request from a local
application or a remote intermediate
database server.
data currency
The state in which the data that is
retrieved into a host variable in a
program is a copy of the data in the base
table.
data dictionary
A repository of information about an
organization's application programs,
databases, logical data models, users, and
authorizations.
data partition
A VSAM data set that is contained within
a partitioned table space.
data-partitioned secondary index (DPSI)
A secondary index that is partitioned
according to the underlying data.
Contrast with nonpartitioned secondary
index.
| data set instance number
A number that indicates the data set that
|
contains the data for an object.
|
data sharing
A function of DB2 for z/OS that enables
applications on different DB2 subsystems
to read from and write to the same data
concurrently.
data-sharing group
A collection of one or more DB2
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Glossary