tELTTeradataMap Standard properties

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.

ELT Teradata Map editor

The ELT Map editor allows you to define the output schema as well as build graphically the SQL statement to be executed. The column names of schema can be different from the column names in the database.

If you have installed the R2020-05 Studio monthly update or a later one provided by Talend, these operators are used: =, <=, <, >=, >, and <>; the corresponding previous operators, including EQ, LE, LT, GE, GT, and NE, are deprecated.

If you have installed the R2020-12 Studio monthly update or a later one provided by Talend, on the upper left corner of the ELT Map editor, you can click the Setup the configurations of elt map button to open a dialog box Property Settings which contains two options:

• Delimited identifiers: With this check box selected, double quotes will be added for all output column names to support delimited identifiers. By default, this check box is cleared.
• Use alias in output table: With this check box selected, aliases will be used for all output columns in the SQL query. By default, this check box is cleared.

If you have installed the R2021-06 Studio monthly update or a later one provided by Talend, an Enable/disable column name filter button is available on the upper right corner of the input and output tables in the Map editor. You can filter schema columns in an input or output table by clicking this button in the corresponding table and entering the search keyword in the field displayed.

Style link

Select the way in which links are displayed.

Auto: By default, the links between the input and output schemas and the Web service parameters are in the form of curves.

Bezier curve: Links between the schema and the Web service parameters are in the form of curve.

Line: Links between the schema and the Web service parameters are in the form of straight lines.

This option slightly optimizes performance.

Property type

Either Built-in or Repository.

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.

Host

Database server IP address

Database

Name of the database

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.

Query band

Select this check box to use the Teradata Query Banding feature to add metadata to the query to be processed, such as the user running the query. This can help you, for example, identify the origin of this query.

Once selecting the check box, the Query Band parameters table is displayed, in which you need to enter the metadata information to be added. This information takes the form of key/value pairs, for example, DpID in the Key column and Finance in the Value column.

This check box actually generates the SET QUERY_BAND FOR SESSION statement with the key/value pairs declared in the Query Band parameters table. For further information about this statement, see https://docs.teradata.com/search/all?query=End+logging+syntax.

This check box is not available when you have selected the Using an existing connection check box. In this situation, if you need to use the Query Band feature, set it in the Advanced settings tab of the Teradata connection component to be used.

tStatCatcher 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

tELTTeradataMap is used along with a tELTTeradataInput and tELTTeradataOutput. Note that the Output link to be used with these components must faithfully reflect the name of the tables.

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.