Projects/Nepomuk/VirtuosoInternal

    From KDE TechBase

    Connecting directly to virtuoso

    via isql

    List of tables

    is a relational database and what not

    All the tables in Virtuoso start with the DB.DBA. prefix.

    • RDF_QUAD -- The main table which contains all the statements. It contains four rows "S", "P", "O" and "G" for the subject, predicate, object and graph.

    Default Indexes

    Common Commands

    status

    sparql_to_sql_text

    The sparql_to_sql_text() function can be used to convert a SPARQL query directly to the SQL it would be executed as.

    varchar sparql_to_sql_text
    ( in squery varchar );
    


    It's very useful in debugging why many sparql queries are taking so long.

    http://docs.openlinksw.com/virtuoso/fn_sparql_to_sql_text.html