Teradata Parallel Data Pump

Glossary
P
parameter: A variable name in a macro for which an argument value is substituted when
the macro is executed.
parser: A program executing in a PE that translates Teradata SQL statements entered by a
user into the steps that accomplish the user’s intensions.
PE: Parsing engine. The vprocs that receive SQL requests from the client and break the
requests into steps. The PE sends the steps to the AMPs and subsequently returns the answer
to the client.
primary key: The field (column) in a database table that is indexed and maintains the main
sequence of the table. For example, account numbers are typically primary keys. A "composite
primary key" is made up of two or more fields (columns) such as region + account number. A
primary key is also known as a unique identifier.
privilege: A user’s right to perform read, write, and execute operations against a table,
database, user, macro, or view.
R
RDBMS (Relational Database Management System): A database management system in
which complex data structures are represented as simple two-dimensional tables consisting of
columns and rows. For Teradata, RDBMS is referred to as Teradata Database.
records: When using Teradata utilities, both formatted and unformatted records are
accepted for loading. A formatted record, in the Teradata Database world, consists of a record
created by a Teradata utility, such as BTEQ, where the record is packaged with begin- and endrecord
bytes specific to Teradata Database. Unformatted records are any data file, such as a text
file, that does not have various properties such as a consistent structure with regard to record
length and order of data elements. These files must be defined before loading onto Teradata
Database.
request:
Database.
In host software, a message sent from an application program to Teradata
restart log table:
paused job.
One of four restart tables that the Teradata utilities require for restarting a
result:
The information returned to the user to satisfy a request made of Teradata Database.
row: The fields that represent one entry under each column in a table. The row is the
smallest unit of information operated on by data manipulation statements.
S
schema: Used for identifying the structure of data. Producers have an output schema to
define what the source data will look like in the data stream. Consumers have an input schema
to define what is read from the data stream. If the input and output schemas are the same, the
schema need only be defined once.
266 Teradata Parallel Data Pump Reference