Start the Virtuoso Web User Interface

Figure 8.392. Start

Select the "Conductor" link in the Left Frame and Login as the "dba" user.

Figure 8.393. Conductor

Select the "Databases" -> "External Data Source" -> "Data Sources" tab menu items

Figure 8.394. Databases

Select the "Connect" button for the "mysqlma" MySQL DSN.

Figure 8.395. Connect

On successful connection Select the "Link Objects" button to obtain a list of available tables

Figure 8.396. Link Objects

Select all the tables that are part of the "mysql" catalog.

Figure 8.397. Select tables

Ensure a primary key is assigned to all table that are to be used in the EDM generation phase.

Figure 8.398. Catalog

Change the Catalog for each table to be "mysql" using the "Set All" button.

Select the "Link" button to link the selected tables into Virtuoso

Figure 8.399. "Link" button

On completion of the Link process the tables will be displayed in the "External Linked Objects" tab.

Figure 8.400. Completion

The linked tables can be queried by clicking on the hyperlink in the "Local Name" column of the "External Linked Objects" tab above, which loads the Virtuoso "Interactive SQL" interface with the required SQL "Select" for retrieving the remote table data . We shall use the "mysql.mysqlma.artist" table to demonstrate this.

Figure 8.401. Completion

Then click the "Execute" button to run the query and retrieve the results from the remote table.

Figure 8.402. Completion

The tables can also be viewed as part of the Virtuoso "SQL Schema Objects" under the "mysql" catalog name.

Figure 8.403. view tables

The Link process is now complete enabling the tables to be queried as if part of the Virtuoso Schema.