tFlowToIterate Properties - 6.1

Talend Components Reference Guide

EnrichVersion
6.1
EnrichProdName
Talend Big Data
Talend Big Data Platform
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Talend Data Integration
Talend Data Management Platform
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Talend ESB
Talend MDM Platform
Talend Open Studio for Big Data
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Talend Real-Time Big Data Platform
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

Component family

Orchestration

 

Function

tFlowToIterate iterates on the input data and generates global variables.

Purpose

This component is used to read data line by line from the input flow and store the data entries in iterative global variables.

Basic settings

Use the default (key, value) in global variables

When selected, the system uses the default value of the global variable in the current Job.

 

Customize

key: Type in a name for the new global variable. Press Ctrl+Space to access all available variables either global or user-defined.

 

 

value: Click in the cell to access a list of the columns attached to the defined global variable.

Usage

You cannot use this component as a start component. tFlowToIterate requires an output component.

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.

NB_LINE: the number of rows processed. This is an After variable and it returns an integer.

CURRENT_ITERATION: the sequence number of the current iteration. This is a Flow variable and it returns an integer.

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.

Connections

Outgoing links (from this component to another):

Row: Iterate

Trigger: Run if; On Component Ok; On Component Error.

Incoming links (from one component to this one):

Row: Main;

For further information regarding connections, see Talend Studio User Guide.

Log4j

If you are using a subscription-based version of the Studio, the activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User Guide.

For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.

Limitation

n/a