tMysqlLastInsertId

Obtains the primary key value of the record that was last inserted in a Mysql table
by a user.

tMysqlLastInsertId fetches the last inserted ID from a
selected MySQL Connection.

tMysqlLastInsertId Standard properties

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

The Standard
tMysqlLastInsertId component belongs to the Databases family.

The component in this framework is generally available.

Basic settings

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.
	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.

Global Variables

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.

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

Usage rule	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.
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 examples on using dynamic parameters, see Scenario: Reading data from databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic settings and context variables, see Talend Studio User Guide.

Usage rule

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.

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 examples on using dynamic parameters, see Scenario: Reading data from databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic
settings and context variables, see
Talend Studio User Guide.

Scenario: Get the ID for the last inserted record with
tMysqlLastInsertId

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.

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 6.x

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