IBM DB2 Manual page 555

does not require the use of an SQL
preprocessor. In addition, ODBC provides
an architecture that lets users add
modules called database drivers, which link
the application to their choice of database
management systems at run time. This
means that applications no longer need to
be directly linked to the modules of all
the database management systems that
are supported.
ordinary identifier
An uppercase letter followed by zero or
more characters, each of which is an
uppercase letter, a digit, or the underscore
character. An ordinary identifier must not
be a reserved word.
ordinary token
A numeric constant, an ordinary
identifier, a host identifier, or a keyword.
originating task
In a parallel group, the primary agent
that receives data from other execution
units (referred to as parallel tasks) that are
executing portions of the query in
parallel.
outer join
The result of a join operation that
includes the matched rows of both tables
that are being joined and preserves some
or all of the unmatched rows of the tables
that are being joined. See also join,
equijoin, full outer join, inner join, left
outer join, and right outer join.
overloaded function
A function name for which multiple
function instances exist.
package
An object containing a set of SQL
statements that have been statically
bound and that is available for
processing. A package is sometimes also
called an application package.
package list
An ordered list of package names that
may be used to extend an application
plan.
package name
The name of an object that is used for an
|
application package or an SQL procedure
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| package. An application package is a
bound version of a database request
|
module (DBRM) that is created by a
|
BIND PACKAGE or REBIND PACKAGE
|
| command. An SQL procedural language
package is created by a CREATE or
|
ALTER PROCEDURE statement for a
|
| native SQL procedure. The name of a
package consists of a location name, a
|
collection ID, a package ID, and a version
|
| ID.
| page A unit of storage within a table space (4
KB, 8 KB, 16 KB, or 32 KB) or index space
|
(4 KB, 8 KB, 16 KB, or 32 KB). In a table
|
| space, a page contains one or more rows
of a table. In a LOB or XML table space, a
|
| LOB or XML value can span more than
| one page, but no more than one LOB or
XML value is stored on a page.
|
page set
Another way to refer to a table space or
index space. Each page set consists of a
collection of VSAM data sets.
page set recovery pending (PSRCP)
A restrictive state of an index space. In
this case, the entire page set must be
recovered. Recovery of a logical part is
prohibited.
panel A predefined display image that defines
the locations and characteristics of display
fields on a display surface (for example, a
menu panel).
parallel complex
A cluster of machines that work together
to handle multiple transactions and
applications.
parallel group
A set of consecutive operations that
execute in parallel and that have the same
number of parallel tasks.
parallel I/O processing
A form of I/O processing in which DB2
initiates multiple concurrent requests for a
single user query and performs I/O
processing concurrently (in parallel) on
multiple data partitions.
parallelism assistant
In Sysplex query parallelism, a DB2
subsystem that helps to process parts of a
parallel query that originates on another
DB2 subsystem in the data sharing group.
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Glossary