IBM DB2 Manual page 544

exception table
A table that holds rows that violate
referential constraints or check constraints
that the CHECK DATA utility finds.
exclusive lock
A lock that prevents concurrently
executing application processes from
reading or changing data. Contrast with
share lock.
executable statement
An SQL statement that can be embedded
in an application program, dynamically
prepared and executed, or issued
interactively.
execution context
In SQLJ, a Java object that can be used to
control the execution of SQL statements.
exit routine
A user-written (or IBM-provided default)
program that receives control from DB2 to
perform specific functions. Exit routines
run as extensions of DB2.
expanding conversion
A process that occurs when the length of
a converted string is greater than that of
the source string. For example, this
process occurs when an ASCII mixed-data
string that contains DBCS characters is
converted to an EBCDIC mixed-data
string; the converted string is longer
because shift codes are added.
explicit hierarchical locking
Locking that is used to make the
parent-child relationship between
resources known to IRLM. This kind of
locking avoids global locking overhead
when no inter-DB2 interest exists on a
resource.
explicit privilege
| A privilege that has a name and is held as
the result of an SQL GRANT statement
|
and revoked as the result of an SQL
|
| REVOKE statement. For example, the
SELECT privilege.
|
exposed name
A correlation name or a table or view
name for which a correlation name is not
specified.
expression
An operand or a collection of operators
and operands that yields a single value.
528
Application Programming Guide and Reference for Java
Extended Recovery Facility (XRF)
A facility that minimizes the effect of
failures in z/OS, VTAM, the host
processor, or high-availability applications
during sessions between high-availability
applications and designated terminals.
This facility provides an alternative
subsystem to take over sessions from the
failing subsystem.
Extensible Markup Language (XML)
A standard metalanguage for defining
markup languages that is a subset of
Standardized General Markup Language
(SGML).
external function
| A function that has its functional logic
implemented in a programming language
|
| application that resides outside the
database, in the file system of the
|
database server. The association of the
|
| function with the external code
application is specified by the EXTERNAL
|
clause in the CREATE FUNCTION
|
| statement. External functions can be
classified as external scalar functions and
|
external table functions. Contrast with
|
| sourced function, built-in function, and
SQL function.
|
external procedure
A procedure that has its procedural logic
|
| implemented in an external programming
language application. The association of
|
| the procedure with the external
| application is specified by a CREATE
PROCEDURE statement with a
|
| LANGUAGE clause that has a value other
| than SQL and an EXTERNAL clause that
implicitly or explicitly specifies the name
|
| of the external application. Contrast with
external SQL procedure and native SQL
|
procedure.
|
external routine
A user-defined function or stored
procedure that is based on code that is
written in an external programming
language.
| external SQL procedure
An SQL procedure that is processed using
|
a generated C program that is a
|
| representation of the procedure. When an
external SQL procedure is called, the C
|
program representation of the procedure
|
| is executed in a stored procedures address
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