Connection URL

Enter the connection string used to open the database. For details, please see http://msdn.microsoft.com/en-us/library/system.data.oledb.oledbconnection.connectionstring.aspx.

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.

Table Name

Enter the name of the table to be processed.

Query Type

Select either Built-in or Repository query type from the drop-down
list.

Built-in: Fill in manually the query statement or
build it graphically using SQLBuilder.

Repository: Select the relevant query stored in the
Repository. The Query field gets
accordingly filled in.

Guess Query

Click the button to generate the query which corresponds to the defined table schema in
the Query field.

Guess schema

Click the button to retrieve the schema from the table.

Query

Specify the database query paying particularly attention to properly sequence the
fields in order to match the schema definition.

Trim all the String/Char columns

Select this check box to remove leading and trailing whitespace from all the
String/Char columns.

Trim column

Select the check box in Trim column to remove leading
and trailing whitespace from the corresponding column.

This field appears only when the Trim all
the String/Char columns check box is cleared.

tStatCatcher Statistics

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

Global Variables

NB_LINE: the number of rows processed. This is an After
variable and it returns an integer.

QUERY: the query statement being processed. This is a Flow
variable and it returns a string.

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 a start component in a Job and it always needs an output
link.