JDBC Type 4 Driver Programmer's Reference for SQL/MX Release 3.2.1

CLOB Short for Character Large OBject, text data stored as a single entity in a database management
system. A Java Clob object (Java type, java.sql.Clob) corresponds to the SQL CLOB data
type.
command The operation demanded by an operator or program; a demand for action by, or information
from, a subsystem. A command is typically conveyed as an interprocess message from a program
to a subsystem.
concurrency A condition in which two or more transactions act on the same record in a database at the same
time. To process a transaction, a program must assume that its input from the database is consistent,
regardless of any concurrent changes being made to the database. TMF manages concurrent
transactions through concurrency control.
concurrency
control
Protection of a database record from concurrent access by more than one process. TMF imposes
this control by dynamically locking and unlocking affected records to ensure that only one
transaction at a time accesses those records.
connection pooling A framework for pooling JDBC connections.
Core Packages The required set of APIs in a Java platform edition which must be supported in any and all
compatible implementations.
D
Data Control
Language (DCL)
The set of data control statements within the SQL language.
Data Manipulation
Language (DML)
The set of data-manipulation statements within the SQL/MP language. These statements include
INSERT, DELETE, and UPDATE, which cause database modifications that Remote Duplicate
Database Facility (RDF) can replicate.
DCL See Data Control Language (DCL).
DML See Data Manipulation Language (DML).
driver A class in JDBC that implements a connection to a particular database management system such
as NonStop SQL/MX. The NonStop Server for Java 6.0 has these driver implementations: JDBC
Driver for SQL/MP(JDBC/MP) and JDBC Driver for SQL/MX (JDBC/MX).
DriverManager The JDBC class that manages drivers.
E
exception An event during program execution that prevents the program from continuing normally; generally,
an error. Java methods raise exceptions using the throw keyword and handle exceptions using
try, catch, and finally blocks.
Expand The HP NonStop operating system network that extends the concept of fault tolerance to networks
of geographically distributed NonStop systems. If the network is properly designed, communication
paths are constantly available even if there is a single line failure or component failure.
expandability See scalability.
F
fault tolerance The ability of a computer system to continue processing during and after a single fault (the failure
of a system component) without the loss of data or function.
G
get() method A method used to read a data item. For example, the SQLMPConnection.getAutoCommit()
method returns the transaction mode of the JDBC driver's connection to an SQL/MP or SQL/MX
database. Compare to set() method.
Guardian An environment available for interactive and programmatic use with the NonStop operating
system. Processes that run in the Guardian environment use the Guardian system procedure calls
as their API. Interactive users of the Guardian environment use the TACL or another HP product's
command interpreter. Compare to OSS.
GUI See graphical user interface (GUI).
118 Glossary