Getting 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.

For more technologies supported by Talend, see Talend components.

• 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 [...] 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.