# tDB2Output Executes the action defined on the table and/or on the data contained in the table, based on the flow incoming from the preceding component in the Job. tDB2Output writes, updates, makes changes or suppresses entries in a database. ## tDB2Output Standard properties These properties are used to configure tDB2Output running in the Standard Job framework. The Standard tDB2Output component belongs to the Databases family. The component in this framework is available in all Talend products. Information noteNote: This component is a specific version of a dynamic database connector. The properties related to database settings vary depending on your database type selection. For more information about dynamic database connectors, see [DB Generic components](https://help.qlik.com/talend/r/en-US/8.0/components/db-generic/db-generic-component). ## Basic settings | Properties | Description | | --- | --- | | Database | Select the desired database type from the list and click
Apply. | | Use an existing
connection | Select this check box and in the Component
List drop-down list, select the desired connection component to
reuse the connection details you already defined.

Information noteNote: When a Job contains the parent Job and the child Job, do the following if you
want to share an existing connection between the parent Job and the child Job (for example,
to share the connection created by the parent Job with the child Job).

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.
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 [Sharing a database connection](https://help.qlik.com/talend/r/en-US/7.3/studio-user-guide/sharing-database-connection). | | 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.

| | ![](https://help.qlik.com/talend/en-US/components/8.0/Resources/images/Save_Icon.png) | 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 [Centralizing database metadata](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/centralizing-database-metadata). | | Host | Database server IP
address | | Port | Listening port
number of DB server. | | Database | Name of the
database | | Table
schema | Name of the DB
schema. | | Username and Password | DB user
authentication data.

To enter the password, click the [...] button
next to the password field, enter the password in double quotes in the pop-up dialog box,
and click OK to save the settings. | | Table | Name of the table to
be written. Note that only one table can be written at a
time | | Action on
table | Information noteNote:

The Action on table list will not be available if you
select the Enable
parallel execution check box in the Advanced settings
view.

On the table
defined, you can perform one of the following operations:

Default: No operation is carried out.

Drop and create a table: The table is
removed and created again.

Create a
table: The table does not exist and gets created.

Create a table if not exists: The table
is created if it does not exist.

Drop a table if exists
and create: The table is removed if it already exists
and created again.

Clear a table: The table
content is deleted.

Truncate table: The
table content is deleted. You do not have the possibility to rollback
the operation.

Truncate table with reuse
storage: The table content is deleted. You do not have
the possibility to rollback the operation. However, you can reuse the
existing storage allocated to the table, even if the storage is
considered empty.

Information noteWarning:

If you select the
Use an existing
connection check box, and then select Truncate table or
Truncate table with
reuse storage from the Action on table list, a commit
statement will be invoked before the truncate operation because the
truncate statement must be the first statement in a
transaction. | | Action on
data | On the data of the table defined, you
can perform:

Insert: Add new entries to the table.
If duplicates are found, Job stops.

Update: Make
changes to existing
entries.

Information noteNote: In cases where all the schema
columns are set as keys, this action yields an error and the Job fails.

Insert or
update: Insert a new record. If the record with the given reference
already exists, an update would be
made.

Information noteNote: In cases where all the schema
columns are set as keys, this action yields a warning message and the Job
continues.

Update or
insert: Update the record with the given reference. If the record does
not exist, a new record would be
inserted.

Information noteNote: In cases where all the schema
columns are set as keys, this action yields a warning message and the Job
continues.

Delete: Remove entries corresponding to
the input flow.

Information noteWarning:

*You must specify at least one column as a primary key on which
the Update and Delete operations are based.
You can do that by clicking Edit Schema and selecting the
check box(es) next to the column(s) you want to set as primary
key(s). For an advanced use, click the Advanced
settings view where you can simultaneously
define primary keys for the update and delete operations. To do
that: Select the Use
field options check box and then in the
Key in
update column, select the check boxes next to
the column name on which you want to base the update operation.
Do the same in the Key in delete column for the deletion
operation.*

Information noteNote:

The dynamic schema feature can be
used in the following modes: Insert; Update; Insert or update; Update or insert;
Delete. | | 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.

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 Dynamic schema.

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: You create and store the schema locally for this component only.
Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job designs.

When the schema to be reused has default values that are integers or functions, ensure that these default values are not enclosed within quotation marks. If they are, you must remove the quotation marks manually.

For more information, see Retrieving table schemas.
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.

| | Specify a data source
alias | Select this checkbox and specify the alias of a data source created on the *Talend Runtime* side to use the shared connection pool defined in the data source configuration. This
option works only when you deploy and run your Job in *Talend Runtime*.

This checkbox is not available when the Use an existing
connection checkbox is selected. | | Data source
alias | Enter the alias of the data source created on the *Talend Runtime* side.

This field is available only when the Specify a data
source alias checkbox is selected. | | 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 | Properties | Description | | --- | --- | | Use alternate schema | Select this option to use a schema other than
the one specified by the component that establishes the database connection (that is,
the component selected from the Component list
drop-down list in Basic settings view). After
selecting this option, provide the name of the desired schema in the Schema field.

This option is available when Use an
existing connection is selected in Basic
settings view. | | Additional JDBC parameters | Specify additional connection properties for the DB connection you are
creating.

Information noteNote: You can set the encoding parameters through this
field. | | Commit every | Enter the 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 at execution. | | Additional Columns |

This option is not offered if you create (with or without drop) the DB table. This option allows you to call SQL functions to perform actions on columns, which are not insert, nor update or delete actions, or action that require particular preprocessing.
Name: Type in the name of the schema column to be altered or inserted as new column
SQL expression: Type in the SQL statement to be executed in order to alter or insert the relevant column data.
Position: Select Before, Replace or After following the action to be performed on the reference column.
Reference column: Type in a column of reference that the tDBOutput can use to place or replace the new or altered column.

| | Use field options | Select this check box to customize a request, especially when there is
double action on data. | | Convert columns and table names to
uppercase | Select this check box to uppercase the names of the columns and the name of
the table. | | Debug query mode | Select this check box to display each step during processing entries
in a database. | | Support null in "SQL WHERE" statement | Select this check box if you want to deal with the Null values contained in
a DB table.

Information noteNote: Make sure the Nullable check box is selected for
the corresponding columns in the schema. | | Use Batch Size | Select this check box to activate the batch mode for data processing.

Information noteNote: This check box is available only when you have selected the
Insert, the Update or the Delete option in the Action on
data field. | | Batch Size | Specify the number of records to be processed in each batch.

This field is available only when the Use batch mode
check box is selected.

Information noteNote: The value for this option might be changed depending on the JDBC driver
capabilities. | | tStatCatcher Statistics | Select this check
box to collect log data at the component level. | | Enable parallel execution | Select this check box to perform high-speed data processing, by treating
multiple data flows simultaneously. Note that this feature depends on the database or
the application ability to handle multiple inserts in parallel as well as the number of
CPU affected. In the Number of parallel executions
field, either:

Enter the number of parallel executions desired.
Press Ctrl+Space and select the appropriate context variable from the list. For further information about context variables, see Using contexts and variables.

Note that when parallel execution is enabled, it is not possible to use global
variables to retrieve return values in a subJob.

Information noteWarning:

The Action on table field is not available with the parallelization function. Therefore, you must use a tCreateTable component if you want to create a table.
When parallel execution is enabled, it is not possible to use global variables to retrieve return values in a subJob.

| ## Global Variables | Variables | Description | | --- | --- | | Global
Variables | NB\_LINE:
the number of rows processed. This is an After variable and it returns an integer.

NB\_LINE\_UPDATED: the number of rows updated.
This is an After variable and it returns an integer.

NB\_LINE\_INSERTED: the number of
rows inserted. This is an After variable and it returns an integer.

NB\_LINE\_DELETED: the
number of rows deleted. This is an After variable and it returns an integer.

NB\_LINE\_REJECTED: the number of rows rejected. This is an After
variable and it returns an integer.

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 checkbox is
cleared, if the component has this checkbox.

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 more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). | ## Usage | Usage guidance | Description | | --- | --- | | **Usage
rule** | This component
offers the flexibility benefit of the DB query and covers all of the SQL
queries possible.

This
component must be used as an output component. It allows you to carry
out actions on a table or on the data of a table in a DB2 database. It
also allows you to create a reject flow using a Row > Rejects link
to filter data in error. For an example of tMysqlOutput in use, see [Retrieving data in error with a Reject link](https://help.qlik.com/talend/en-US/components/8.0/mysql/tmysqloutput-tmap-tfileoutputdelimited-tfileinputdelimited-retrieving-data-in-error-with-reject-link-standard-component-this). | | 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 [Reading data from databases through
context-based dynamic connections](https://help.qlik.com/talend/r/en-US/8.0/components/defining-context-groups/reading-data-from-databases-through-context-based-dynamic-connections) and [Reading data from different MySQL databases
using dynamically loaded connection parameters](https://help.qlik.com/talend/r/en-US/8.0/components/context/reading-data-from-different-mysql-databases-using-dynamically-loaded-connection-parameters). For more information on
Dynamic settings and context variables, see
[Dynamic schema](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/dynamic-schema) and [Creating a context group and define context
variables in it](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/creating-context-group-and-define-context-variables-in-it). |