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 click the relevant connection component to reuse the connection
details you already defined.

Host

Type in the IP address or hostname of the database server.

Port

Type in the listening port number of the database server.

Database

Type in the name of the database.

Schema

Type in the name of the schema.

Username and Password

Type in the database 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.

Additional JDBC Parameters

Specify additional JDBC properties for the connection you are creating. The
properties are separated by ampersand & and each property is a key-value pair. For
example, ssl=true &
sslfactory=com.amazon.redshift.ssl.NonValidatingFactory, which means the
connection will be created using SSL.

Table Name

Type in the name of the table from which the data will be read.

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.

Query Type and Query

Enter the database query paying particularly attention to the proper
sequence of the fields in order to match the schema definition.

Guess Query

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

Access Key

Specify the Access Key ID that uniquely identifies an AWS Account. For
how to get your Access Key and Access Secret, visit Getting Your AWS Access Keys.

Secret Key

Specify the Secret Access Key, constituting the security credentials
in combination with the access Key.

To enter the secret key, click the […] button next to
the secret key field, and then in the pop-up dialog box enter the password between double
quotes and click OK to save the settings.

Bucket

Type in the name of the Amazon S3 bucket, namely the top level folder,
to which the data is unloaded.

Key prefix

Type in the name prefix for the unload files on Amazon S3. By default,
the unload files are written per slice of the Redshift cluster and the
file names are written in the format
<object_path>/<name_prefix><slice-number>_part_<file-number>.

File type

Select the type of the unload files on Amazon S3 from the list:

• Delimited file or CSV: a
  delimited/CSV file.

• Fixed width: a fixed-width
  file.

Fields terminated by

Enter the character used to separate fields.

This field appears only when Delimited file or
CSV is selected from the File
type list.

Enclosed by

Select the character in a pair of which the fields are
enclosed.

This list appears only when Delimited file or
CSV is selected from the File
type list.

Fixed width mapping

Enter a string that specifies a user-defined column label and column
width between double quotation marks. The format of the string
is:

ColumnLabel1:ColumnWidth1,ColumnLabel2:ColumnWidth2,....

Note that the column label in the string has no relation to the table
column name and it can be either a text string or an integer. The order
of the label/width pairs must match the order of the table columns
exactly.

This field appears only when Fixed
width is selected from the File
type list.

Compressed by

Select this check box and from the list displayed select the
compression type of the files.

Encrypt

Select this check box to encrypt unload file(s) using Amazon S3
client-side encryption. In the Encryption
key field displayed, enter the encryption key used to
encrypt the unload file(s). Note that only a base64 encoded AES 128-bit
or AES 256-bit envelope key is supported. For more information, see
Unloading Encrypted Data Files.

Specify null string

Select this check box and from the list displayed select a string that
represents a null value in unload files.

Escape

Select this check box to place an escape character () before every
occurrence of the following characters for CHAR and VARCHAR columns in
the delimited unload files: linefeed (
), carriage return (
), the
delimiter character specified for the unloaded data, the escape
character (), a quote character (” or ‘).

Overwrite s3 object if exist

Select this check box to overwrite the existing Amazon S3 object
files.

Parallel

Select this check box to write data in parallel to multiple unload
files on Amazon S3 according to the number of slices in the Redshift
cluster.

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 covers all possible SQL queries for the Amazon Redshift
database.

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.