July 30, 2023

tTeradataSCD – Docs for ESB 7.x


Addresses Slowly Changing Dimension needs, reading regularly a source of data and
logging the changes into a dedicated SCD table.

tTeradataSCD reflects and tracks changes in a dedicated
Teradata SCD table.

tTeradataSCD Standard properties

These properties are used to configure tTeradataSCD running in the Standard Job framework.

The Standard
tTeradataSCD component belongs to the Business Intelligence and the Databases families.

The component in this framework is available in all Talend

Note: This component is a specific version of a dynamic database
connector. The properties related to database settings vary depending on your database
type selection. For more information about dynamic database connectors, see Dynamic database components.

Basic settings


Select a type of database from the list and click

Property Type

Either Built-In or Repository.


Built-In: No property data stored


Repository: Select the repository
file in which the properties are stored. The database connection related
fields that follow are completed automatically using the data

Use an existing connection

Select this check box and in the Component List click the relevant connection component to
reuse the connection details you already defined.

Note: When a Job contains the parent Job and the child Job, if you
need to share an existing connection between the two levels, for example, to share the
connection created by the parent Job with the child Job, you have to:

  1. In the parent level, register the database connection
    to be shared in the Basic
    view of the connection component which creates that very database

  2. In the child level, use a dedicated connection
    component to read that registered database connection.

For an example about how to share a database connection
across Job levels, see

Talend Studio
User Guide


Type in the IP address or hostname of the database.


Type in the name of the database you want to use.

Username and Password

Type in the database user authentication data.

To enter the password, click the […] button next to the
password field, and then in the pop-up dialog box enter the password between double quotes
and click OK to save the settings.


Type in the name of the table to be written. Note that only one table can be written at
a time.

Action on table

On the table defined, you can perform one of the following operations:

  • None: No operation is
    carried out.

  • Create table: The table does not exist and gets

  • Create table if not exists: The table is created if
    it does not exist.

Schema and Edit schema

A schema is a row description. It defines the number of fields
(columns) to be processed and passed on to the next component. When you create a Spark
Job, avoid the reserved word line when naming the


Built-In: You create and store the schema locally for this component


Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs.


Click Edit
to make changes to the schema. If the current schema is of the Repository type, three options are available:

  • View schema: choose this
    option to view the schema only.

  • Change to built-in property:
    choose this option to change the schema to Built-in for local changes.

  • Update repository connection:
    choose this option to change the schema stored in the repository and decide whether
    to propagate the changes to all the Jobs upon completion. If you just want to
    propagate the changes to the current Job, you can select No upon completion and choose this schema metadata
    again in the Repository Content

SCD Editor

The SCD editor helps to build and configure the data flow for slowly
changing dimension outputs.

For more information, see SCD management methodology.

Use memory saving mode

Select this check box to maximize system performance.

Source keys include Null

Select this check box to allow the source key columns to have Null


Special attention should be paid to the uniqueness of the source
key(s) values when this option is selected.

Die on error

Select the check box to stop the execution of the Job when an error

Clear the check box to skip any rows on error and complete the process for
error-free rows. When errors are skipped, you can collect the rows on error using a Row > Reject link.

Advanced settings

Additional JDBC Parameters

Specify additional connection properties for the database connection
you are creating.

This field is not visible when the Use an existing
check box is selected.

Debug mode

Select this check box to display each step during processing entries
in a database.

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at the Job
level as well as at each component level.

Global Variables

Global Variables

NB_LINE_UPDATED: the number of rows updated. This is an
After variable and it returns an integer.

NB_LINE_INSERTED: the number of rows inserted. This is an
After variable and it returns an integer.

ERROR_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error check box is
cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable
functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl +
to access the variable list and choose the variable to use from it.

For further information about variables, see
Talend Studio

User Guide.


Usage rule

This component is used as an Output component. It requires an
Input component and a Row >
Main link as input.


This component does not support using SCD type 0 together with other
SCD types.

Related scenario

For a similar scenario using MySQL database, see Tracking data changes using Slowly Changing Dimensions (type 0 through type 3).

Document get from Talend https://help.talend.com
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