tPaloCheckElements - 6.1

Talend Components Reference Guide

EnrichVersion
6.1
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Talend Big Data
Talend Big Data Platform
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Talend Data Integration
Talend Data Management Platform
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task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

tPaloCheckElements Properties

Component family

Business Intelligence/Cube OLAP/Palo

 

Function

This component checks whether elements are present in an incoming data flow existing in a given cube.

Purpose

This component can be used along with tPaloOutputMulti. It checks if the elements from the input stream exist in the given cube, before writing them. It can also define a default value to be used for nonexistent elements.

Basic settings

Use an existing connection

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

Note

When a Job contains the parent Job and the child Job, Component List presents only the connection components in the same Job level.

Connection configuration

Note

Unavailable when using an existing connec­tion.

Host Name

Enter the host name or the IP address of the host server.

 

Server Port

Type in the listening port number of the Palo server.

 

Username and Password

Enter the Palo user authentication data.

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.

 

Database

Type in the name of the database in which the data is to be written.

 

Cube

Type in the name of the cube in which the data should be written.

 

On element error

Select what should happen if an element does not exist:

- Reject row: the corresponding row is rejected and placed in the reject flow.

- Use default: the defined Default value is used.

- Stop: the entire process is interrupted.

 

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. The schema is either Built-In or stored remotely in the Repository.

Since version 5.6, both the Built-In mode and the Repository mode are available in any of the Talend solutions.

Click Edit schema 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] window.

 

 

Built-in: The schema is created and stored locally for this component only. Related topic: see Talend Studio User Guide.

 

 

Repository: The schema already exists and is stored in the Repository, hence can be reused. Related topic: see Talend Studio User Guide.

 

 

Define the elements to be checked in the table provided.

- Column: shows the column(s) from the input schema. It is completed automatically once a schema is retrieved or created.

- Element type: select the element type for the input column. Only one column can be defined as Measure.

- Default: type in the default value to be used if you have selected the Use default option in the On element error field.

Advanced settings

tStat Catcher Statistics

Select this check box to collect log data on the component level.

Connections

Outgoing links (from this component to another):

Row: Main; Rejects

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

Incoming links (from one component to this one):

Row: Main; Rejects

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

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

For further information about variables, see Talend Studio User Guide.

Usage

This component requires an input component.

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

This component only works on Normal Palo cubes.

Due to license incompatibility, one or more JARs required to use this component are not provided. You can install the missing JARs for this particular component by clicking the Install button on the Component tab view. You can also find out and add all missing JARs easily on the Modules tab in the Integration perspective of your studio. For details, see https://help.talend.com/display/KB/How+to+install+external+modules+in+the+Talend+products or the section describing how to configure the Studio in the Talend Installation Guide.