July 30, 2023

tHSQLDbRow – Docs for ESB 7.x

tHSQLDbRow

Acts on the actual DB structure or on the data (although without handling
data), depending on the nature of the query and the database.

The SQLBuilder
tool helps you write easily your SQL statements.

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.

tHSQLDbRow Standard properties

These properties are used to configure tHSQLDbRow running in the Standard Job framework.

The Standard
tHSQLDbRow component belongs to the Databases family.

The component in this framework is available in all Talend
products
.

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 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. When you create a Spark
Job, avoid the reserved word line when naming the
fields.

 

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
.

 

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.

Global Variables

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.

Usage

Usage rule

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

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
.

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. You can find more details about how to install external modules in
Talend Help Center (https://help.talend.com)
.

Related scenarios


Document get from Talend https://help.talend.com
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