July 30, 2023

tPaloCheckElements – Docs for ESB 7.x

tPaloCheckElements

Checks whether elements are present in an incoming data flow existing in a given
cube.

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.

tPaloCheckElements Standard properties

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

The Standard
tPaloCheckElements component belongs to the Business Intelligence family.

The component in this framework is available in all Talend
products
.

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.

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. When you create a Spark
Job, avoid the reserved word line when naming the
fields.

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.

Global Variables

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

Usage rule

This component requires an input component.

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
.

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. You can find more details about how to install external modules in
Talend Help Center (https://help.talend.com)
.


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