Property type

Either Built-in or Repository.

Built-in: No property data stored
centrally. Enter properties manually.

Repository: Select the repository
file where Properties are stored. The fields that come after are
pre-filled in using the fetched data.

DB Version

Select the Mysql version you are using.

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.

Host

The IP address of the database server.

Port

Listening port number of database server.

Database

Name of the database

Username and
Password

User authentication data for a dedicated database.

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.

Source table

Name of the input MySQL SCD table.

Table

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

Action on table

Select to perform one of the following operations on the table
defined:

None: No action carried out on the
table.

Drop and create the table: The
table is removed and created again

Create a table: A new table gets
created.

Create a table if not exists: A
table gets created if it does not exist.

Clear a table: The table content is
deleted. You have the possibility to rollback the operation.

Truncate a table: The table content
is deleted. You don not have the possibility to rollback the
operation.

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. The schema is either Built-In or stored remotely in the Repository.

Click Edit schema 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] window.

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.

Surrogate Key

Select the surrogate key column from the list.

Creation

Select the method to be used for the surrogate key
generation.

For more information regarding the creation methods, see SCD management methodology.

Source Keys

Select one or more columns to be used as keys, to ensure the
unicity of incoming data.

Use SCD Type 1 fields

Use type 1 if tracking changes is not necessary. SCD Type 1 should
be used for typos corrections for example. Select the columns of the
schema that will be checked for changes.

Use SCD Type 2 fields

Use type 2 if changes need to be tracked down. SCD Type 2 should
be used to trace updates for example. Select the columns of the
schema that will be checked for changes.

Start date: Adds a column to your
SCD schema to hold the strat date value. You can select one of the
input schema columns as Start Date in the SCD table.

End Date: Adds a column to your SCD
schema to hold the end date value for the record. When the record is
currently active, the End Date column shows a null value, or you can
select Fixed Year value and fill it
in with a fictive year to avoid having a null value in the End Date
field.

Log Active Status: Adds a column to
your SCD schema to hold the true or
false status value. This column
helps to easily spot the active record.

Log versions: Adds a column to your
SCD schema to hold the version number of the record.

Debug mode

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

tStat
Catcher Statistics

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

Global Variables

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 rule

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

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 examples on using dynamic parameters, see Scenario: Reading data from databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic
settings and context variables, see
Talend Studio User Guide.