tPaloCheckElements – Docs for ESB 5.x

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.

Connection configuration

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 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:

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

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 and Upgrade
Guide.