tPostgresqlValidRows - 6.1

Talend Components Reference Guide

EnrichVersion
6.1
EnrichProdName
Talend Big Data
Talend Big Data Platform
Talend Data Fabric
Talend Data Integration
Talend Data Management Platform
Talend Data Services Platform
Talend ESB
Talend MDM Platform
Talend Open Studio for Big Data
Talend Open Studio for Data Integration
Talend Open Studio for Data Quality
Talend Open Studio for ESB
Talend Open Studio for MDM
Talend Real-Time Big Data Platform
task
Data Governance
Data Quality and Preparation
Design and Development
EnrichPlatform
Talend Studio

Warning

This component will be available in the Palette of Talend Studio on the condition that you have subscribed to one of the Talend Platform products.

tPostgresqlValidRows properties

Component family

Data Quality

 

Function

tPostgresqlValidRows checks database rows against specific Data Quality patterns (regular expression).

Purpose

tPostgresqlValidRows allows you to extract DB rows that match a given data quality pattern.

Basic settings

Validation type

Either Regex pattern validation or DQ rule validation.

 

 

Regex pattern validation: Validate data in the database against regex patterns.

 

 

DQ rule validation: Validate data in the database against DQ rules.

Property type

Either Built-in or Repository.

Since version 5.6, both the Built-In mode and the Repository mode are available in any of the Talend solutions.

 

 

Built-in: No property data stored centrally.

 

 

Repository: Select the repository file where Properties are stored. The fields that come after are pre-filled in using the fetched data.

 

Use 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

When a Job contains the parent Job and the child Job, if you need to share an existing connection between the two levels, for example, to share the connection created by the parent Job with the child Job, you have to:

  1. In the parent level, register the database connection to be shared in the Basic settings view of the connection component which creates that very database connection.

  2. In the child level, use a dedicated connection component to read that registered database connection.

For an example about how to share a database connection across Job levels, see Talend Studio User Guide.

 

DB Version

List of database versions.

 

Host

Database server IP address.

 

Port

Listening port number of DB server.

 

Database

Name of the database.

 

Postgresql schema

Name of the Postgresql schema.

 

Username and Password

DB 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.

 

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:

  • 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: You create and store the schema 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 and thus reuse it when needed. Related topic: see Talend Studio User Guide.

 

Table Name

Enter the name of the table to be read.

 

Where clause

Enter a WHERE clause to define a row filter on the table.

You can use the WHERE clause to filter the rows you want to analyze in the table. This WHERE clause enables you then to retrieve valid and invalid data that match certain specified criteria or conditions.

Note

Available only for Regex pattern validation.

Analyzed column

Select from the schema list the column to analyze.

Note

Available only for Regex pattern validation.

Custom pattern

Select this check box to define manually your own customized regular expression against which you want to check the DB rows.

Note

Available only for Regex pattern validation.

Patterns list

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

Note

Available only for DQ rule validation.

DQ rule list

Select from the list the rule against which you want to check the DB rows.

Note

Available only for DQ rule validation.

Query type

Either Built-in or Repository:

  

Built-in: Fill in manually the query statement or build it graphically using SQLBuilder.

  

Repository: Select the relevant query stored in the Repository. The Query field are filled in accordingly.

Note

Available only for DQ rule validation.

Guess Query

Click the Guess Querry button to generate the query which corresponds to your table schema in the Query field.

Note

Available only for DQ rule validation.

Guess schema

Click the Guess Schema button to retrieve the schema from the table.

Note

Available only for DQ rule validation.

Query

Enter your DB query paying particular attention to properly sequence the fields in order to match the schema definition.

Advanced settings

Use cursor

Select this check box to specify the number of rows you want to work with at a given time. This option optimises performance.

 

Trim all the String/Char columns

Select this check box to remove leading and trailing whitespace from all the String/Char columns.
 

Trim column

Remove leading and trailing whitespace from the defined columns.

This check box is not visible if Trim all the String/Char columns is selected. Clear Trim all the String/Char columns to enable Trim column.

 

tStatCatcher Statistics

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

Dynamic settings

Click the [+] button to add a row in the table and fill the Code field with a context variable to choose your database connection dynamically from multiple connections planned in your Job. This feature is useful when you need to access database tables having the same data structure but in different databases, especially when you are working in an environment where you cannot change your Job settings, for example, when your Job has to be deployed and executed independent of Talend Studio.

The Dynamic settings table is available only when the Use an existing connection check box is selected in the Basic settings view. Once a dynamic parameter is defined, the Component List box in the Basic settings view becomes unusable.

For examples on using dynamic parameters, see Scenario 3: Reading data from MySQL databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic settings and context variables, see Talend Studio User Guide.

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.

QUERY: the SQL query statement being processed. This is a Flow variable and it returns a string.

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 can be used as a start or intermediary step. It requires an output flow.

Limitation

n/a