tPaloCubeList - 6.3

Talend Components Reference Guide

EnrichVersion
6.3
EnrichProdName
Talend Big Data
Talend Big Data Platform
Talend Data Fabric
Talend Data Integration
Talend Data Management Platform
Talend Data Services Platform
Talend ESB
Talend MDM Platform
Talend Open Studio for Big Data
Talend Open Studio for Data Integration
Talend Open Studio for Data Quality
Talend Open Studio for ESB
Talend Open Studio for MDM
Talend Real-Time Big Data Platform
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

Function

This component retrieves a list of cube details from the given Palo database.

Purpose

This component lists cube names, cube types, number of assigned dimensions, the number of filled cells from the given database.

Discovering the read-only output schema of tPaloCubeList

The below table presents information related to the read-only schema of the tPaloCubeList component.

Column

Type

Description

Cube_id

int

Internal id of the cube.

Cube_name

string

Name of the cube.

Cube_dimensions

int

Number of dimensions inside the cube.

Cube_cells

long

Number of calculated cells inside the cube.

Cube_filled_cells

long

Number of filled cells inside the cube.

Cube_status

int

Status of the cube. It may be:

- 0: unloaded

- 1: loaded

- 2: changed

Cube_type

int

Type of the cube. It may be:

- 0: normal

- 1: system

- 2: attribute

- 3: user info

- 4. gpu type

tPaloCubeList Properties

Component family

Business Intelligence/Cube OLAP/Palo

 

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 that 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 whose cube details you want to retrieve.

Advanced settings

tStat Catcher Statistics

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

Global Variables

NB_CUBES: the number of cubes. This is an After variable and it returns an integer.

CUBEID: the ID of the cube. This is a Flow variable and it returns an integer.

CUBENAME: the name of the cube. 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 + 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: Main, Iterate;

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

Incoming links (from one component to this one):

Row: Iterate

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

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

Usage

This component can be used as a start component. It requires an output 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

The output schema is fixed and read-only.

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 the article Installing External Modules on Talend Help Center (https://help.talend.com) how to configure the Studio in the Talend Installation Guide.

Scenario: Retrieving detailed cube information from a given database

The Job in this scenario retrieves detailed information of the cubes pertaining to the demo Palo database, Biker.

To replicate this scenario, proceed as follows:

Setting up the Job

  1. Drop tPaloCubeList and tLogRow from the component Palette onto the design workspace.

  2. Right-click tPaloCubeList to open the contextual menu.

  3. From this menu, select Row > Main to link the two components.

Configuring the tPaloCube component

  1. Double-click the tPaloCube component to open its Component view.

  2. In the Host name field, type in the host name or the IP address of the host server, localhost for this example.

  3. In the Server Port field, type in the listening port number of the Palo server. In this scenario, it is 7777.

  4. In the Username field and the Password field, type in the authentication information. In this example, both of them are admin.

  5. In the Database field, type in the database name in which you want to create the cube, Biker in this example.

Job execution

Press F6 to run the Job.

The cube details are retrieved from the Biker database and are listed in the console of the Run view.

For further information about how to inteprete the cube details listed in the console, see Discovering the read-only output schema of tPaloCubeList.