tHSQLDbRow - 6.1

Talend Components Reference Guide

EnrichVersion
6.1
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Talend Big Data
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task
Data Governance
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Talend Studio

tHSQLDbRow properties

Component family

Databases/HSQLDb

 

Function

tHSQLDbRow is the specific component for this database query. It executes the SQL query stated onto the specified database. The row suffix means the component implements a flow in the job design although it doesn't provide output.

Purpose

Depending on the nature of the query and the database, tHSQLDbRow acts on the actual DB structure or on the data (although without handling data). The SQLBuilder tool helps you write easily your SQL statements.

Basic settings

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 in which the properties are stored. The fields that follow are completed automatically using the data retrieved.

 

Running Mode

Select on the list the Server Mode corresponding to your DB setup among the four propositions :

HSQLDb Server, HSQLDb WebServer, HSQLDb In Process Persistent, HSQLDb In Memory.

 

Use TLS/SSL sockets

Select this check box to enable the secured mode if required.

 

Host

Database server IP address

 

Port

Listening port number of DB server.

 

Database Alias

Name of the database

 

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.

 

DB path

Specify the directory to the database you want to connect to. This field is available only to the HSQLDb In Process Persistent running mode.

Note

By default, if the database you specify in this field does not exist, it will be created automatically. If you want to change this default setting, modify the connection parameter set in the Additional JDBC parameter field in the Advanced settings view

 

Database

Enter the database name that you want to connect to. This field is available only to the HSQLDb In Process Persistent running mode and the HSQLDb In Memory running mode.

 

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.

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

 

 

Built-in: The schema is created and stored locally for this component only. Related topic: see Talend Studio User Guide.

 

 

Repository: The schema already exists and is stored in the Repository, hence can be reused. Related topic: see Talend Studio User Guide.

  

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.

 

Query 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: Fill in manually the query statement or build it graphically using SQLBuilder

 

 

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

 

Query

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

 

Die on error

This check box is selected by default. Clear the check box to skip the row on error and complete the process for error-free rows. If needed, you can retrieve the rows on error via a Row > Rejects link.

Advanced settings

Additional JDBC parameters

Specify additional connection properties for the DB connection you are creating. When the running mode is HSQLDb In Process Persistent , you can set the connection property ifexists=true to allow connection to an existing database only and avoid creating a new database.

 

Propagate QUERY's recordset

Select this check box to insert the result of the query into a COLUMN of the current flow. Select this column from the use column list.

 

Commit every

Number of rows to be completed before committing batches of rows together into the DB. This option ensures transaction quality (but not rollback) and above all better performance on executions.

 

tStat Catcher Statistics

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

Usage

This component offers the flexibility of the DB query and covers all possible SQL queries.

Global Variables

QUERY: Indicates the query to be processed. This is a Flow variable and it returns a string.

For further information about variables, see Talend Studio User Guide.

Note

A Flow variable means it functions during the execution of a component while an After variable means it functions after the execution of a component.

Connections

Outgoing links (from this component to another):

Row: Main; Reject; Iterate

Trigger: Run if; On Component Ok; On Component Error; On Subjob Ok; On Subjob Error.

Incoming links (from one component to this one):

Row: Main; Iterate

Trigger: Run if; On Component Ok; On Component Error; On Subjob Ok; On Subjob Error.

For further information regarding connections, see Talend Studio User Guide.

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.