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.

Click this icon to open a database connection wizard and store the
database connection parameters you set in the component Basic settings view.

For more information about setting up and storing database connection
parameters, see
Talend Studio User
Guide.

Use an existing connection

Select this check box and from the list displayed select the
relevant connection component to reuse the connection details you have already defined.

Host name

Enter the host or host list of the EXASol database servers. EXASol can run in a cluster
environment. The valid value can be a simple IP address (for example, 172.16.173.128), an IP range list (for example, 172.16.173.128..130 that represents three servers 172.16.173.128, 172.16.173.129, and 172.16.173.130), or a
comma-separated host list (for example, server1,server2,server3) of the EXASolution database cluster.

Port

Enter the listening port number of the EXASolution database cluster.

Schema name

Enter the name of the schema you want to use.

Username and Password

Enter the user authentication data to access the EXASolution 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.

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: You create and store the schema locally for this component
  only.

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

This
component offers the advantage of the dynamic schema feature. This allows you to
retrieve unknown columns from source files or to copy batches of columns from a source
without mapping each column individually. For further information about dynamic schemas,
see
Talend Studio

User Guide.

This
dynamic schema feature is designed for the purpose of retrieving unknown columns of a
table and is recommended to be used for this purpose only; it is not recommended for the
use of creating tables.

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 queried.

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 that corresponds to the table
schema in the Query field.

Guess schema

Click the button to retrieve the schema from the table.

Change fetch size

Select this check box to change the fetch size which specifies the
amount of resultset data sent during one single communication step with
the database. In the Fetch size field
displayed, you need to enter the size in KB.

Additional JDBC parameters

Specify additional connection properties for the database connection you are
creating. The properties are separated by semicolon and each property is a key-value
pair, for example, encryption=1;clientname=Talend.

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

Trim all the String/Char columns

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

Trim column

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

This table is not available if the Trim all the
String/Char columns check box is selected.

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.

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 usually used as a start component of a Job or subJob
and it needs an output 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

Due to license incompatibility, one or more JARs required to use
this component are not provided. You can install the missing JARs for this particular
component by clicking the Install button
on the Component tab view. You can also
find out and add all missing JARs easily on the Modules tab in the
Integration
perspective of your studio. You can find more details about how to install external modules in
Talend Help Center (https://help.talend.com).