tPostgresPlusSCD – Docs for ESB 5.x

Component family

Databases/PostgresPlus Server

Function

tPostgresPlusSCD reflects and tracks changes in
a dedicated MSSQL SCD table.

Purpose

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

Basic settings

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.

Property type

Either Built-in or Repository.

Since version 5.6, both the Built-In mode and the Repository mode are
available in any of the Talend solutions.

Built-in: No property data stored
centrally.

Repository: Select the Repository file where
Properties are stored. The following fields are pre-filled in using fetched
data.

DB Version

List of database versions.

Server

Database server IP address.

Port

Listening port number of DB server.

Database

Name of the database.

Schema

Name of the DB schema.

Username and Password

DB 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.

Table

Name of the table to be written. Note that only one table can be written at a
time.

Schema and Edit schema

A schema is a row description. It defines the number of fields to be processed and passed on
to the next component. The schema is either Built-In or
stored remotely in the Repository.

Since version 5.6, both the Built-In mode and the Repository mode are
available in any of the Talend solutions.

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

Built-in: The schema is created and stored
locally for this component only. Related topic: see Talend Studio User
Guide.

Repository: The schema already exists and is
stored in the Repository, hence can be reused. Related topic: see Talend Studio User
Guide.

SCD Editor

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

For more information, see SCD management methodologies.

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 values.

Die on error

This check box is cleared by default, meaning to skip the row on error and to
complete the process for error-free rows.

Advanced settings

End date time details

Specify the time value of the SCD end date time setting in the
format of HH:mm:ss. The default
value for this field is 12:00:00.

This field appears only when SCD Type
2 is used and Fixed year
value is selected for creating the SCD end date. For
more information about SCD Type 2,
see SCD management methodologies.

Debug mode

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

tStatCatcher Statistics

Select this check box to collect log data at the component level.

Dynamic settings

Click the [+] button to add a row in the table and fill
the Code field with a context variable to choose your
database connection dynamically from multiple connections planned in your Job. This feature
is useful when you need to access database tables having the same data structure but in
different databases, especially when you are working in an environment where you cannot
change your Job settings, for example, when your Job has to be deployed and executed
independent of Talend Studio.

The Dynamic settings table is available only when the
Use an existing connection check box is selected in the
Basic settings view. Once a dynamic parameter is
defined, the Component List box in the Basic settings view becomes unusable.

For more information on Dynamic settings and context
variables, see Talend Studio User Guide.

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.

NB_LINE_REJECTED: the number of rows rejected. 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 +
Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio
User Guide.

Usage

This component is used as Output component. It requires an Input component and
Row main link as input.