July 30, 2023

tCombinedSQLInput – Docs for ESB 7.x


Extracts fields from a database table based on its schema definition.

Then it passes on the field list to the next component via a Combine row link. The schema
of tCombinedSQLInput can be different from that of
the source database table but must correspond to it in terms of the column order.

tCombinedSQLInput extracts fields
from a database table based on its schema. This component also has column filtering
capabilities since its schema can be different from that of the database table.

tCombinedSQLInput Standard properties

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

The Standard
tCombinedSQLInput component belongs to the ELT family.

The component in this framework is available in all Talend

Basic settings


Name of the source database table.


Name of the source table’s schema. This field has to be filled if
the database is Oracle.

Schema and Edit

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


Built-in: You create and store
the schema locally for this component only. Related topic: see

Talend Studio User


Repository: You have already
created the schema and stored it in the Repository. You can reuse it
in various projects and Jobs. Related topic: see
Talend Studio User

Add additional columns

This option allows you to call SQL functions to perform actions on
columns, provided that these are not insert, update or delete
actions, or actions that require pre-processing.


Name: Type in the name of the
schema column to be altered.


SQL expression: Type in the SQL
statement to be executed in order to alter the data in the
corresponding column.

Advanced settings

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at a
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 a Flow variable and it returns an

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 +
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 an intermediary component. The use of the
corresponding connection and commit components is recommended when
using this component to allow a unique connection to be open and
then closed during the Job execution.

Related scenario

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