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.
This component is not shipped with your Talend Studio by default. You need to install it using the Feature Manager. For more information, see Installing features using the Feature Manager.
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 and in Talend Data Fabric.
Basic settings
| Properties | Description |
|---|---|
|
Schema and Edit schema |
|
| Column to check | Select the column you want to analyze. You can analyze columns of type String only. |
|
PROPERTY |
The pattern against which you want to check the data
is either Built-in or stored remotely in the
Repository.
|
Advanced settings
| Properties | Description |
|---|---|
|
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
| Variables | Description |
|---|---|
|
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 more information about variables, see Using contexts and variables. |
Usage
| Usage guidance | Description |
|---|---|
|
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 patterns in Talend Studio, see Importing data profiling items or projects. |