Examples of org.apache.metamodel.DataContext.executeQuery()

org.apache.metamodel.DataContext.executeQuery()
Executes a query against the DataContext. @param query the query object to execute @return the {@link DataSet} produced from executing the query @throws MetaModelException if the specified query does not make sense or cannot be executed because of restraints on the type of datastore.

    assertEquals("[Schema[name=mysql], Schema[name=performance_schema], Schema[name=portal], "
        + "Schema[name=sakila], Schema[name=world]]", Arrays.toString(schemas));


    Table table = dc.getSchemaByName("sakila").getTableByName("film");
    Query q = new Query().from(table).select(table.getColumns());
    DataSet data = dc.executeQuery(q);
    TableModel tableModel = new DataSetTableModel(data);
    assertEquals(13, tableModel.getColumnCount());
    assertEquals(1000, tableModel.getRowCount());
  }

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        q.toString());
    FilterItem f1 = new FilterItem(q.getSelectClause().getItem(0), OperatorType.EQUALS_TO, 5);
    FilterItem f2 = new FilterItem(q.getSelectClause().getItem(0), OperatorType.EQUALS_TO, 8);
    q.where(new FilterItem(f1, f2));


    DataSet dataSet = dc.executeQuery(q);
    TableModel tableModel = new DataSetTableModel(dataSet);
    assertEquals(4, tableModel.getColumnCount());
    assertEquals(2, tableModel.getRowCount());
    assertEquals("LOLLOBRIGIDA", tableModel.getValueAt(0, 2));

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    assertEquals(4, tableModel.getColumnCount());
    assertEquals(2, tableModel.getRowCount());
    assertEquals("LOLLOBRIGIDA", tableModel.getValueAt(0, 2));


    q.setMaxRows(1);
    dataSet = dc.executeQuery(q);
    tableModel = new DataSetTableModel(dataSet);
    assertEquals(4, tableModel.getColumnCount());
    assertEquals(1, tableModel.getRowCount());
    assertEquals("LOLLOBRIGIDA", tableModel.getValueAt(0, 2));

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    assertEquals(1, tableModel.getRowCount());
    assertEquals("LOLLOBRIGIDA", tableModel.getValueAt(0, 2));
    
    q.setMaxRows(1);
    q.setFirstRow(2);
        dataSet = dc.executeQuery(q);
        tableModel = new DataSetTableModel(dataSet);
        assertEquals(4, tableModel.getColumnCount());
        assertEquals(1, tableModel.getRowCount());
        assertEquals("JOHANSSON", tableModel.getValueAt(0, 2));

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        assertEquals("JOHANSSON", tableModel.getValueAt(0, 2));


    q.getWhereClause().removeItems();
    q.setMaxRows(25);
    q.setFirstRow(1);
    dataSet = dc.executeQuery(q);
    tableModel = new DataSetTableModel(dataSet);
    assertEquals(4, tableModel.getColumnCount());
    assertEquals(25, tableModel.getRowCount());
    assertEquals("GUINESS", tableModel.getValueAt(0, 2).toString());
  }

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        }
        
    DataContext dc = new JdbcDataContext(getConnection());
    Table table = dc.getDefaultSchema().getTableByName("film");
    Query q = new Query().select(table.getColumns()).from(table).setMaxRows(400);
    dc.executeQuery(q);
  }


  public void testGetSchema() throws Exception {
      if (!isConfigured()) {
            return;

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            return;
        }
        
    DataContext dc = new JdbcDataContext(getConnection(), TableType.DEFAULT_TABLE_TYPES, "sakila");
    Query q = dc.query().from("category").selectCount().where("name").eq("kasper's horror movies").toQuery();
    DataSet ds = dc.executeQuery(q);
    assertTrue(ds.next());
    assertEquals(0, ((Number) ds.getRow().getValue(0)).intValue());
    assertFalse(ds.next());
  }

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        Column titleColumn = productsTable.getColumnByName("title");
        Column productPriceColumn = productsTable.getColumnByName("price");
        q.select(titleColumn, productPriceColumn);
        q.getSelectClause().getItem(0).setAlias("product-title");


        DataSet data = dc.executeQuery(q);
        TableModel tableModel = new DataSetTableModel(data);
        assertEquals(2, tableModel.getColumnCount());
        assertEquals(10000, tableModel.getRowCount());


        assertEquals("ACADEMY ACADEMY", tableModel.getValueAt(0, 0).toString());

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        assertEquals("SELECT \"products\".\"title\" AS product-title, SUM(\"orderlines\".\"quantity\") AS orderAmount "
                + "FROM public.\"products\", public.\"orderlines\" "
                + "WHERE \"products\".\"prod_id\" = \"orderlines\".\"prod_id\" " + "GROUP BY \"products\".\"title\" "
                + "HAVING SUM(\"orderlines\".\"quantity\") > 25 " + "ORDER BY \"products\".\"title\" ASC", q.toString());
        data = dc.executeQuery(q);
        tableModel = new DataSetTableModel(data);
        assertEquals(2, tableModel.getColumnCount());
        assertEquals(136, tableModel.getRowCount());


        assertEquals("ACADEMY ALABAMA", tableModel.getValueAt(0, 0).toString());

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                q.toString());


        DataSet data1 = dataContext1.executeQuery(q);
        assertTrue(data1.next());
        assertEquals("Row[values=[Australia, 430300.0]]", data1.getRow().toString());
        DataSet data2 = dataContext2.executeQuery(q);
        assertTrue(data2.next());
        assertEquals("Row[values=[Australia, 430300.0]]", data2.getRow().toString());
        assertEquals(new DataSetTableModel(data1), new DataSetTableModel(data2));
    }

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