tMysqlLastInsertId

tMysqlLastInsertId properties

Component family	Databases
Function	tMysqlLastInsertId fetches the last inserted ID from a selected MySQL Connection.
Purpose	tMysqlLastInsertId obtains the primary key value of the record that was last inserted in a Mysql table by a user.
Basic settings	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.
		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.
	Component list	Select the relevant tMysqlConnection component in the list if more than one connection is planned for the current job.
Advanced settings	tStatCatcher Statistics	Select this check box to collect log data at the component level.
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. Once a dynamic parameter is defined, the Component List box in the Basic settings view becomes unusable. For more information on Dynamic settings and context variables, see Talend Studio User Guide.
Global Variables	NB_LINE: the number of rows processed. 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 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 to be used as an intermediary component. Warning If you use this component with tMySqlOutput, verify that the Extend Insert check box in the Advanced Settings tab is not selected. Extend Insert allows you to make a batch insertion, however, if the check box is selected, only the ID of the last line in the last batch will be returned.
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.
Limitation	n/a

Scenario: Get the ID for the last inserted record

The following Java scenario creates a job that opens a connection to Mysql database,
writes the defined data into the database, and finally fetches the last inserted ID on
the existing connection.

Drop the following components from the Palette onto the design workspace: tMySqlConnection, tMySqlCommit,
tFileInputDelimited, tMySqlOutput, tMysqlLastInsertId, and tLogRow.
Connect tMySqlConnection to tFileInputDelimited using an OnSubjobOk link.
Connect tFileInputDelimited to tMySqlCommit using an OnSubjobOk link.
Connect tFileInputdelimited to the three
other components using Row Main links.

In the design workspace, select tMysqlConnection.
Click the Component tab to define the basic
settings for tMysqlConnection.
In the Basic settings view, set the
connection details manually or select them from
the context variable list, through a Ctrl+Space click in the corresponding field if you stored
them locally as Metadata DB connection entries. For more information about
Metadata, see Talend Studio
User Guide.

In the design workspace, select tMysqlCommit
and click the Component tab to define its basic
settings.
On the Component List, select the relevant
tMysqlConnection if more than one
connection is used.
In the design workspace, select tFileInputDelimited.
Click the Component tab to define the basic
settings of tFileInputDelimited.

Fill in a path to the processed file in the File
Name field. The file used in this example is
Customers.
Define the Row separator that allow to
identify the end of a row. Then define the Field
separator used to delimit fields in a row.
Set the header, the footer and the number of processed rows as necessary. In
this scenario, we have one header.
Click
the three-dot button next to Edit Schema to
define the data to pass on to the next component.

Related topics: Talend Studio
User Guide.

In this scenario, the schema consists of two columns, name and
age. The first holds three employees’ names and the second
holds the corresponding age for each.

In the design workspace, select tMySqlOutput.
Click the Component tab to define the basic
settings of tMySqlOuptput.

Select the Use an existing connection check
box.
In the Table field, enter the name of the
table where to write the employees’ list, in this example:
employee.
Select relevant actions on the Action on table
and Action on data lists. In this
example, no action is carried out on table, and the action carried out on data
is Insert.
Click
Sync columns to synchronize columns with
the previous component. In this example, the schema to be inserted into the
MySql database table consists of the two columns name
and age.

In the design workspace, select tMySqlLastInsertId.
Click the Component tab to define the basic
settings of tMySqlLastInserId.

On the Component List, select the relevant
tMysqlConnection, if more than one
connection is used.
Click
Sync columns to synchronize columns with
the previous component. In the output schema of tMySqlLastInsertId, you can see the read-only column
last_insert_id that will fetch the last inserted ID on the
existing connection.

Note

You can select the data type Long from the
Type drop-down list in case of a huge number of
entries.

In the design workspace, select tLogRow and
click the Component tab to define its basic
settings. For more information, see tLogRow.
Save your job and press F6 to execute
it.

tMysqlLastInsertId fetched the last inserted ID for
each line on the existing connection.

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

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Docs 5.x

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tMysqlLastInsertId – Docs for ESB 5.x