July 30, 2023

tNeo4jBatchSchema – Docs for ESB 7.x


Defines the schema of a local Neo4j database.

tNeo4jBatchSchema Standard properties

These properties are used to configure tNeo4jBatchSchema running in the Standard Job framework.

The Standard
tNeo4jBatchSchema 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

Use an existing

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

This component supports Neo4j version V3.2.X only and does not support the remote mode. Therefore, do not reuse the connection to versions other than V3.2.X defined in a tNeo4jConnection component and do not select the Remote server check box in tNeo4jConnection.

not use a 2.X.X version and a 3.X.X version in the same Job. Otherwise,
class conflict issues occur.

Database path

Specify the directory to hold your data files. If the specified
directory does not exist, it will be created.

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

Shutdown after

Select this check box to shutdown the Neo4j database connection when no more
operations on Neo4j are going to be performed after the current

Alternatively, you can use tNeo4jClose to shutdown the

This avoids errors such as “Id file not properly shutdown” at next execution
of Jobs involving Neo4j.

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

Schema definition

Add indexes and unique property constraints to define the schema:

  • Schema type: select whether it is an index (Index on node property) or a constraint (Node property is unique) to be defined.

  • For node with label: enter, within double quotation marks, the label of a node.

  • On property: enter, within double quotation marks, the property of a node.

Advanced settings

Neo4j configuration

Add parameters to the table to configure the database to be created.

For further information, see Neo4j documentation: Configuration settings.

When entering values, use the syntax demonstrated by the examples given alongside the column names of this Nodes files table.

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

NB_LINE: the number of rows read by an input component or
transferred to an output component. This is an After variable and it returns an

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.


Usage rule

This component is used standalone in a subJob to write a Neo4j graph

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