Use Existing Connection

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

URL

Enter the URL of the ServiceNow instance to be connected.

Username and Password

Enter the user authentication data to connect to the ServiceNow instance.

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

Select the name of the table from which the data will be retrieved or select Use Custom Table and in the Custom Table Name field displayed enter the
table name.

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.

• Built-In: You create and store the
  schema locally for this component only. Related topic: see
  Talend Studio
  
  User Guide.

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

Conditions

Specify search conditions to retrieve only the data that matches the criteria by
clicking the [+] button to add as many
conditions as needed and then setting the following parameters for each
condition:

• Input column: click in the cell and select the column
  of the input schema on which the search condition is to be
  set.

• Operator: click in the cell and select an operator
  for the search condition.

• Value: enter the value for the corresponding column
  for the search condition.

Trim all columns

Select this check box to remove the leading and trailing whitespaces from all
columns.

Limit

Enter the maximum number of records to be retrieved.

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 

NB_LINE: the number of rows processed. 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 rule

This component is usually used as a start component in a
Talend
flow and it
requires an output component.

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.