IBM DB2 Manual page 551

linear data set (LDS)
A VSAM data set that contains data but
no control information. A linear data set
can be accessed as a byte-addressable
string in virtual storage.
linkage editor
A computer program for creating load
modules from one or more object
modules or load modules by resolving
cross references among the modules and,
if necessary, adjusting addresses.
link-edit
The action of creating a loadable
computer program using a linkage editor.
list A type of object, which DB2 utilities can
process, that identifies multiple table
spaces, multiple index spaces, or both. A
list is defined with the LISTDEF utility
control statement.
list structure
A coupling facility structure that lets data
be shared and manipulated as elements of
a queue.
L-lock See logical lock.
load module
A program unit that is suitable for
loading into main storage for execution.
The output of a linkage editor.
LOB See large object.
LOB locator
A mechanism that allows an application
program to manipulate a large object
value in the database system. A LOB
locator is a fullword integer value that
represents a single LOB value. An
application program retrieves a LOB
locator into a host variable and can then
apply SQL operations to the associated
LOB value using the locator.
LOB lock
A lock on a LOB value.
LOB table space
A table space that contains all the data for
a particular LOB column in the related
base table.
local A way of referring to any object that the
local DB2 subsystem maintains. A local
table, for example, is a table that is
maintained by the local DB2 subsystem.
Contrast with remote.
locale The definition of a subset of a user's
environment that combines a CCSID and
characters that are defined for a specific
language and country.
local lock
A lock that provides intra-DB2
concurrency control, but not inter-DB2
concurrency control; that is, its scope is a
single DB2.
local subsystem
The unique relational DBMS to which the
user or application program is directly
connected (in the case of DB2, by one of
the DB2 attachment facilities).
location
The unique name of a database server. An
application uses the location name to
access a DB2 database server. A database
alias can be used to override the location
name when accessing a remote server.
location alias
Another name by which a database server
identifies itself in the network.
Applications can use this name to access a
DB2 database server.
lock A means of controlling concurrent events
or access to data. DB2 locking is
performed by the IRLM.
lock duration
The interval over which a DB2 lock is
held.
lock escalation
The promotion of a lock from a row, page,
or LOB lock to a table space lock because
the number of page locks that are
concurrently held on a given resource
exceeds a preset limit.
locking
The process by which the integrity of data
is ensured. Locking prevents concurrent
users from accessing inconsistent data.
See also claim, drain, and latch.
lock mode
A representation for the type of access
that concurrently running programs can
have to a resource that a DB2 lock is
holding.
lock object
The resource that is controlled by a DB2
lock.
535
Glossary