tPatternCheck – Docs for ESB 5.x

Component family

Data Quality

Function

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

Purpose

tPatternCheck can give 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.

Basic settings

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.

Built-in: You create the schema
and store it locally for this component only. Related topic: see
Talend Studio User
Guide.

Repository: You have already
created the schema and stored it in the Repository. You can reuse it
in various projects and job designs. Related topic: see Talend Studio User
Guide.

Column to check

Select the column you want to analyze.

Pattern type

Select from the list the pattern against which you want to check
the data.

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

Custom pattern

Select this check box to enter the pattern of interest.

Advanced settings

tStatCatcher
Statistics

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

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

This component is an intermediary step. It requires an input flow
as well as an output.

Limitation

n/a