tEXARow - 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

Function

tEXARow executes SQL queries on specified databases. The Row suffix indicates that it is used to channel a flow in a Job although it does not produce any output data.

Purpose

Depending on the nature of the query and the database, tEXARow acts on the actual structure of the database, or indeed the data, although without modifying them.

tEXARow properties

Component family

Databases/EXA

 

Basic settings

Property Type

Either Built-In or Repository.

  • Built-In: No property data stored centrally.

  • Repository: Select the repository file in which the properties are stored. The database connection fields that follow are completed automatically using the data retrieved.

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

 

Host

Enter the host or host list of the EXASol database servers. EXASol can run in a cluster environment. The valid value can be a simple IP address (e.g. 172.16.173.128), an IP range list (e.g. 172.16.173.128..130 that represents three servers 172.16.173.128, 172.16.173.129, and 172.16.173.130), or a comma-separated host list (e.g. server1,server2,server3) of the EXASolution database cluster.

 

Port

Enter the listening port number of the EXASolution database cluster.

 

Schema name

Enter the name of the schema you want to use.

 

Username and Password

Enter the user authentication data to access the EXASolution database.

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 (columns) to be processed and passed on to the next component. The schema is either Built-In or stored remotely in the Repository.

  • 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. You can reuse it in various projects and Job designs. Related topic: see Talend Studio User Guide.

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.

 

Table Name

Enter the name of the table to be processed.

 

Query Type

Either Built-In or Repository.

  • Built-In: Enter the query manually or with the help of the SQLBuilder.

  • Repository: Select the appropriate query from the Repository. The Query field is then completed automatically.

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

 

Guess Query

Click the Guess Query button to generate the query that corresponds to the table schema in the Query field.

 

Query

Enter the database query paying particularly attention to the proper sequence of the fields in order to match the schema definition.

 

Die on error

Select this check box to stop the execution of the Job when an error occurs.

Clear the check box to skip any rows on error and complete the process for error-free rows. When errors are skipped, you can collect the rows on error using a Row > Reject link.

Advanced settings

Additional JDBC parameters

Specify additional connection properties for the database connection you are creating. The properties are separated by semicolon and each property is a key-value pair, for example, encryption=1;clientname=Talend.

This field is not available if the Use an existing connection check box is selected.

 

Propagate QUERY's recordset

Select this check box to insert the query results in one of the flow columns. Select the particular column from the use column list.

 

Use PreparedStatement

Select this check box to use prepared statements and in the Set PreparedStatement Parameters table displayed, add as many parameters as needed and set the following attributes for each parameter:

  • Parameter Index: enter the index of the prepared statement parameter.

  • Parameter Type: click in the cell and select the type of the parameter from the list.

  • Parameter Value: enter the value of the parameter.

 

Commit every

Enter the number of rows to be included in each batch before the data is written. This option guarantees the quality of the transaction (although there is no rollback option) and improves performance.

 

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

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 offers query flexibility as it covers all possible SQL query requirements.

Log4j

If you are using a subscription-based version of the Studio, the activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User Guide.

For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.

Limitation

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. For details, see https://help.talend.com/display/KB/How+to+install+external+modules+in+the+Talend+products or the section describing how to configure the Studio in the Talend Installation Guide.

Related Scenario

For similar scenarios using other databases, see: