The Loader provides you with functions for unloading, loading, and formatting data between different data sources and data targets using data streams.
This action is known as a transformation and is described using entries in the Loader-specific system tables.
A transformation is identified using Loader and database instance details, a transformation type, the required part of the database catalog, and the data streams.
·
Loader
connection:
Server node, database name, user name, password, SQL mode, ASCII code page,
transaction size, MaxErrorCount, backup tool
·
Database
connection:
Server node, database name
·
Transformations type:
EXTRACT: Data is to be unloaded.
LOAD: Data is to be
loaded.
UPDATE Data is to be
changed.
·
Part of the
database
catalog:
You can define the scope of the database catalog objects of a database
instance involved in a transformation.
ALL: Entire database
catalog
USER: Part of the database catalog that belongs to the specified user
TABLE: Part of the database catalog that belongs to the specified table
You can specify a set of qualified columns of one or more tables.
You can determine
the commands and their runtime information from the system tables for the
parts of the database catalog specified using ALL and USER.