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%VOSWARNING% %META:TOPICPARENT{name="VirtLinkRemoteTables"}% ---+ Linking <nop>PostgreSQL Database Objects into Virtuoso ---++ Steps 1. Start the Virtuoso Web User Interface. %BR%%BR%<img src="%ATTACHURLPATH%/VirtWebHome.png" style="wikiautogen"/>%BR%%BR% 2. Select the *Conductor* link in the left frame and login as the *dba* user. %BR%%BR%<img src="%ATTACHURLPATH%/VirtConductor.png" style="wikiautogen"/>%BR%%BR% 3. Select the *Databases* -> *External Data Source* -> *Data Sources* tab menu items. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR0.png" style="wikiautogen"/>%BR%%BR% 4. Select the *Connect* button for the *pg7ma* <nop>PostgreSQL DSN. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR1.png" style="wikiautogen"/>%BR%%BR% 5. On successful connection, select the *Link Objects* button to obtain a list of available tables. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR2.png" style="wikiautogen"/>%BR%%BR% 6. Select all the tables that you would like to link. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR3.png" style="wikiautogen"/>%BR%%BR% 7. Change the Catalog for each table to be *PGR* using the *Set All* button. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR4.png" style="wikiautogen"/>%BR%%BR% 8. All the catalog names are changed to *PGR*. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR5.png" style="wikiautogen"/>%BR%%BR% 9. Select the *Link* button to link the selected tables into Virtuoso. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR6.png" style="wikiautogen"/>%BR%%BR% 10. On completion of the Link process, the tables will be displayed in the *External Linked Objects* tab. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR7.png" style="wikiautogen"/>%BR%%BR% 11. The linked tables can be queried by clicking on the hyperlink in the *Local Name* column of the *External Linked Objects* tab above. This loads the Virtuoso *Interactive SQL* interface with the required SQL *Select* for retrieving the remote table data. We shall use the *PGR.PGR.Customers* table to demonstrate this. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR9.png" style="wikiautogen"/>%BR%%BR% 12. Click the *Execute* button to run the query and retrieve results from the remote table. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR10.png" style="wikiautogen"/>%BR%%BR% 13. The tables can also be viewed as part of the Virtuoso *SQL Schema Objects* under the *PGR* catalog name. %BR%%BR%<img src="%ATTACHURLPATH%/VirtLinkPGR8.png" style="wikiautogen"/>%BR%%BR% The Link process is now complete enabling the tables to be queried as if part of the Virtuoso Schema. ---++ Related * [[VOSSQL2RDF][Mapping SQL Data to Linked Data Views]] * [[VirtPostgresEntityFrameworkUsage][Using Microsoft Entity Frameworks to Access PostgreSQL Schema Objects with Virtuoso]] CategoryDocumentation CategoryVirtuoso CategoryDotNET CategoryEntityFrameworks CategoryWebSite

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