tHSQLDbInput – Docs for ESB 5.x

Component family

Databases/HSQLDb

Function

tHSQLDbInput reads a database and
extracts fields based on a query.

Purpose

tHSQLDbInput executes a DB query
with a strictly defined order which must correspond to the schema
definition. Then it passes on the field list to the next component
via a Main row link.

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.

Click this icon to open a database connection wizard and store the
database connection parameters you set in the component Basic settings view.

For more information about setting up and storing database
connection parameters, see Talend Studio User Guide.

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

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.

Db name

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 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.

This component offers the advantage of the dynamic schema feature. This allows you to
retrieve unknown columns from source files or to copy batches of columns from a source
without mapping each column individually. For further information about dynamic schemas,
see Talend Studio
User Guide.

This dynamic schema feature is designed for the purpose of retrieving unknown columns
of a table and is recommended to be used for this purpose only; it is not recommended
for the use of creating tables.

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:

Query type and
Query

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

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.

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 defined
columns.

tStat
Catcher Statistics

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

Usage

This component covers all possible SQL queries for HSQLDb
databases.

Global Variables

NB_LINE: Indicates the number of
lines processed. This is an After variable and it returns an
integer.

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.

Connections

Outgoing links (from this component to another):

Row: Main; 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: 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

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.

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 and Upgrade
Guide.