tOleDbOutput - 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

tOleDbOutput properties

Component family

Databases/OleDb

 

Function

This component writes, updates, makes changes or suppresses entries in a database.

Purpose

This component 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.

Basic settings

Database

Enter the connection string used to open the database. For details, please see http://msdn.microsoft.com/en-us/library/system.data.oledb.oledbconnection.connectionstring.aspx.

 

Table

Specify the name of the table to be written. Note that only one table can be written at a time.

 

Action on data

Select one of the following actions that you want to perform on the data from the drop-down list.

  • Insert: insert data.

  • Update: update data.

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

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

  • Delete: delete data.

Warning

It is necessary to specify at least one column as a primary key on which the Update or Delete operation is 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 or Delete operation. To do that, select the Use field options check box and then in the Key in update or Key in delete column, select the check box(es) next to the column name(s) you want to use as a base for the Update or Delete operation.

Note

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

 

Clear data in table

Select this check box to delete data in the defined table before any operation.

 

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: 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.

  

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.

Advanced settings

Additional columns

This option allows you to call SQL functions to perform actions on columns, provided that these are not insert, update or delete actions, or actions that require pre-processing.

  • Name: Type in the name of the schema column to be altered or inserted.

  • SQL expression: Type in the SQL statement to be executed in order to alter or insert the data in the corresponding column.

  • Position: Select Before, After or Replace, depending on the action to be performed on the reference column.

  • Reference column: Type in a reference column used to locate or replace the new column, or the column to be modified.

This option is not available if you have just created the DB table (even if you delete it beforehand).

 

Use field options

Select this check box to customize a request, especially if multiple actions are being carried out on the data.

 

Field options

Select the check box(es) in the table if you want to use the corresponding schema column(s) as a base for your operation.

  • Key in update: define the primary key to use in an update operation.

  • Key in delete: define the primary key to use in a delete operation.

  • Updatable: define the column(s) to update.

  • Insertable: define the column(s) to insert.

This field appears only when the Use field options check box is selected.

 

Enable debug mode

Select this check box to display each step involved in the process of writing data in the database.

 

tStatCatcher Statistics

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

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.

QUERY: the SQL query statement processed. This is an After 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 is normally an end component of a Job and always needs an input link.

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.

Related scenario

For similar scenarios, see tMysqlOutput.