July 30, 2023

tELTHiveInput – Docs for ESB 7.x


Replicates the schema, which the tELTHiveMap
component that follows will use, of the input Hive table.

The three ELT Hive components are closely related, in terms
of their operating conditions. These components should be used to handle Hive DB schemas
to generate Insert statements, including clauses, which are to be executed in the DB
output table defined.

This component provides, for the tELTHiveMap component that follows, the input schema
of the Hive table to be used.

tELTHiveInput Standard properties

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

The Standard
tELTHiveInput component belongs to the ELT family.

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

Basic settings


A schema is a row description. It defines the number of fields 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

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

Edit schema

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

Default table name

Enter the name of the input table to be used.

Default schema name

Enter the name of the database schema to which the input table to
be used is related.

Advanced settings

tStat Catcher Statistics

Select this check box to collect log data at the component

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.


Usage rule

tELTHiveMap is used along with a
tELTHiveInput and tELTHiveOutput. Note that the Output link to be
used with these components must correspond strictly to the syntax of the table

If the Studio used to connect to a Hive database is operated on Windows,
you must manually create a folder called tmp in the root of the
disk where this Studio is installed.


The ELT components do not handle actual data flow but only
schema information.

Usage with Dataproc

The ELT Hive components require Tez to be installed on
the Google Cloud Dataproc cluster to be used.

  • Use the initialization action explained in this Google Cloud Platform
    documentation: Apache Tez on Dataproc.

  • For more details about the general concept of the initialization actions in
    a Google Cloud Dataproc cluster, see the related Google documentation: Initialization actions.

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