July 30, 2023

tPatternCheck – Docs for ESB 7.x

tPatternCheck

Gives two output flows: Matching Data and
Non-Matching Data. The first collects all data that match a given
pattern, and the second collects all data that do not match a given pattern. You can
then implement any required corrections.

The tPatternCheck checks all existing data in a column
against a given Java regular expression.

tPatternCheck Standard properties

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

The Standard
tPatternCheck component belongs to the Data Quality family.

This component is available in Talend Data Management Platform, Talend Big Data Platform, Talend Real Time Big Data Platform, Talend Data Services Platform, Talend MDM Platform and Talend Data Fabric.

Basic settings

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.

 

Built-In: You create and store the schema locally for this component
only.

 

Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs.

Column to check

Select the column you want to analyze.

PROPERTY

The pattern against which you want to check the data is either
Built-in or stored remotely in the
Repository.

Built-in: You can enter a pattern regex in the
Pattern Regex field and store it locally for
this component only.

Repository: From the
Pattern Selector, select the pattern against
which you want to check the data.

These patterns are retrieved from the DQ Repository of Talend Studio.
The list includes the system and user-defined patterns.

Advanced settings

tStatCatcher
Statistics

Select this check box to gather the Job processing metadata at the Job level
as well as at each component level.

Global Variables

Global Variables

NB_LINE: the number of rows read by an input component or
transferred to an output component. This is an After variable and it returns an
integer.

NB_LINE_OK: the number of rows matching a given pattern.
This is an After variable and it returns an integer.

NB_LINE_REJECT: the number of rows not matching a given
pattern. This is an After variable and it returns an integer.

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 is usually used as an intermediate component, and it requires an
input component and an output component.

Limitation

When exporting a Job using
tPatternCheck with a user-defined pattern stored
in the DQ Repository, you must export the pattern
with the Job. Otherwise, the pattern will switch to Built-in mode when
importing the Job in another project.

When importing a Job using tPatternCheck with a system
pattern, the pattern will switch to Built-in mode.

For more information about importing Jobs with
data profiling items in Talend Studio, see the
documentation on Talend Help Center (https://help.talend.com).

Related scenarios

No scenario is available for the Standard version of this component yet.


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