code: public ResultSet getSuperTables(final String catalog, final String schemaPattern, final String tableNamePattern) throws SQLException {
          log.info("getting empty result set, get super tables");
          return getEmptyResultSet();
      }
docs: Retrieves a description of the table hierarchies defined in a particular schema in this database.
  <p/>
  <P>Only supertable information for tables matching the catalog, schema and table name are returned. The table
  name parameter may be a fully- qualified name, in which case, the catalog and schemaPattern parameters are
  ignored. If a table does not have a super table, it is not listed here. Supertables have to be defined in the
  same catalog and schema as the sub tables. Therefore, the type description does not need to include this
  information for the supertable.
  <p/>
  <P>Each type description has the following columns: <OL> <LI><B>TABLE_CAT</B> String => the type's catalog (may
  be <code>null</code>) <LI><B>TABLE_SCHEM</B> String => type's schema (may be <code>null</code>)
  <LI><B>TABLE_NAME</B> String => type name <LI><B>SUPERTABLE_NAME</B> String => the direct super type's name
  </OL>
  <p/>
  <P><B>Note:</B> If the driver does not support type hierarchies, an empty result set is returned.
  
  @param catalog          a catalog name; "" retrieves those without a catalog; <code>null</code> means drop
  catalog name from the selection criteria
  @param schemaPattern    a schema name pattern; "" retrieves those without a schema
  @param tableNamePattern a table name pattern; may be a fully-qualified name
  @return a <code>ResultSet</code> object in which each row is a type description
  @throws java.sql.SQLException if a database access error occurs
  @see #getSearchStringEscape
  @since 1.4