July 30, 2023

tCassandraRow – Docs for ESB 7.x


Acts on the actual DB structure or on the data, depending on the nature of the
query and the database.

tCassandraRow is the specific component
for this database query. It executes the Cassandra Query Language (CQL) query stated in
the specified database. The row suffix means the component implements a flow in the Job
design although it does not provide output.

tCassandraRow Standard properties

These properties are used to configure tCassandraRow running in the Standard Job framework.

The Standard
tCassandraRow component belongs to the Big Data and the Databases NoSQL families.

The component in this framework is available in all Talend products with Big Data
and in Talend Data Fabric.

Basic settings

Property type

Either Built-In or Repository.

Built-In: No property data stored centrally.

Repository: Select the repository file where the
properties are stored.

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.

DB Version Select the Cassandra version you are using.


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


Type in the listening port number of the Cassandra server.

Required Authentication

Select this check box to provide credentials for the Cassandra

This check box appears only if you do not select the Use existing connection check box.


Fill in this field with the username for the Cassandra


Fill in this field with the password for the Cassandra

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.


Type in the name of the keyspace on which you want to execute the
CQL commands.

Column family

Name of the column family.

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

Click Edit
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


Type in the CQL command to be executed.

By default, the query is not case-sensitive. This means that at runtime, the column names
you put in the query are always taken in lower case. If you need to make the query
case-sensitive, put the column names in double quotation marks.

Die on error

This check box is cleared by default, meaning to skip the row on
error and to complete the process for error-free rows.

Advanced settings

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

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 +
to access the variable list and choose the variable to use from it.

For further information about variables, see
Talend Studio

User Guide.

Document get from Talend https://help.talend.com
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