tTeradataSCDELT Standard properties

Select a type of database from the list and click Apply.

Property Type

Either Built-In or Repository.

• Built-In: No property data stored centrally.

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

Use an existing connection

Select this check box and in the Component List drop-down list, select the desired connection component to reuse the connection details you already defined.

Host

Enter the IP address or hostname of the database server.

Database

Enter the name of the database you want to use.

Username and Password

Enter the user authentication data to access the 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

Enter the name of the input Teradata SCD table.

Table

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

Action on table

Select one of the following operations to be performed on the table defined:

• None: No action carried out on the table.

• Create table: A new table gets created.

• Drop and create table: The table is removed and created again.

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

• Drop table if exists and create: The table is removed if it already exists and created again.

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

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

Create

Select the type of the table to be created:

• SET TABLE: creates a SET table that does not allow duplicate rows to be inserted.

• MULTISET TABLE: creates a MULTISET table that allows duplicate rows to be inserted.

This list is available only when Create table, Drop and create table, Create table if not exists, or Drop table if exists and create is selected from the Action on table drop-down list.

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 fields.

• 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.

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.

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 about the creation methods, see SCD management methodology.

Source Keys

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

Use SCD type 1 fields

Select this check box to use SCD Type 1 if tracking changes is not necessary. SCD Type 1 should be used for typos corrections for example.

SCD type 1 fields

Click the [+] button to add as many rows as needed, and in each row select an input schema column that will be checked for Type 1 changes.

This table is available only when the Use SCD type 1 fields check box is selected.

Use SCD type 2 fields

Select this check box to use SCD Type 2 if changes need to be tracked down. SCD Type 2 should be used to trace updates for example.

SCD type 2 fields

Click the [+] button to add as many rows as needed, each row for a column. Click the arrow on the right side of the cell and select the column whose value changes will be tracked using Type 2 SCD from the drop-down list displayed .

This table is available only when the Use SCD type 2 fields option is selected.

Start date

Specify the column that holds the start date for type 2 SCD.

This list is available only when the Use SCD type 2 fields option is selected.

End date

Specify the column that holds the end date for type 2 SCD.

This list is available only when the Use SCD type 2 fields option is selected.

Log active status

Select this check box and from the Active field drop-down list displayed, select the column that holds the true or false status value, which helps to spot the active record for type 2 SCD.

This option is available only when the Use SCD type 2 fields option is selected.

Log versions

Select this check box and from the Version field drop-down list displayed, select the column that holds the version number of the record for type 2 SCD.

This option is available only when the Use SCD type 2 fields option is selected.

Additional JDBC Parameters

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

This field is not available if the Use an existing connection check box is selected.

Source fields value include Null

Select this check box to allow the source columns to have Null values. The source columns here refer to the fields defined in the SCD type 1 fields and SCD type 2 fields tables.

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

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 and it always needs an incoming link.

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 Reading data from databases through context-based dynamic connections and 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.

Limitation

This component requires installation of its related jar files.