Package org.apache.metamodel.jdbc

Examples of org.apache.metamodel.jdbc.JdbcDataContext.query()

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      if (!isConfigured()) {
            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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        assertEquals(getUsername().toUpperCase(), schema.getName());

        Table countryTable = schema.getTableByName("COUNTRY");
        assertNotNull(countryTable);

        DataSet ds = dc.query().from(countryTable).selectCount().execute();
        assertTrue(ds.next());
        assertEquals("Row[values=[1008]]", ds.getRow().toString());
        assertFalse(ds.next());
        ds.close();
    }
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        System.out.println("Tables: " + Arrays.toString(tableNames));

        Table countryTable = schema.getTableByName("COUNTRY");
        assertNotNull(countryTable);

        Query query = dc.query().from(countryTable).select("COUNTRYCODE").limit(200).toQuery();
        assertEquals("SELECT DB2INST1.\"COUNTRY\".\"COUNTRYCODE\" FROM DB2INST1.\"COUNTRY\" "
                + "FETCH FIRST 200 ROWS ONLY", dc.getQueryRewriter().rewriteQuery(query));

        DataSet ds = dc.executeQuery(query);
        for (int i = 0; i < 200; i++) {
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        System.out.println("Tables: " + Arrays.toString(tableNames));

        Table countryTable = schema.getTableByName("COUNTRY");
        assertNotNull(countryTable);

        Query query = dc.query().from(countryTable).select("COUNTRYCODE").limit(200).offset(200).toQuery();
        assertEquals(
                "SELECT metamodel_subquery.\"COUNTRYCODE\" FROM ("
                        + "SELECT DB2INST1.\"COUNTRY\".\"COUNTRYCODE\", ROW_NUMBER() OVER() AS metamodel_row_number FROM DB2INST1.\"COUNTRY\""
                        + ") metamodel_subquery WHERE metamodel_row_number BETWEEN 201 AND 400", dc.getQueryRewriter()
                        .rewriteQuery(query));
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        JdbcDataContext dc = new JdbcDataContext(getConnection(), TableType.DEFAULT_TABLE_TYPES, DATABASE_NAME);
        IQueryRewriter queryRewriter = dc.getQueryRewriter();
        assertSame(SQLServerQueryRewriter.class, queryRewriter.getClass());

        Query q = dc.query().from("Production", "Product").select("Name").where("Color").eq("R'ed").toQuery();

        assertEquals(
                "SELECT \"Product\".\"Name\" FROM Production.\"Product\" Product WHERE Product.\"Color\" = 'R''ed'",
                queryRewriter.rewriteQuery(q));
    }
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        // the jdbc driver represents the date as a VARCHAR
        assertEquals("[Column[name=id,columnNumber=0,type=INTEGER,nullable=false,nativeType=int,columnSize=10], "
                + "Column[name=birthdate,columnNumber=1,type=VARCHAR,nullable=true,nativeType=date,columnSize=10]]",
                Arrays.toString(table.getColumns()));

        DataSet ds = dc.query().from(table).select("id").and("birthdate").execute();
        assertTrue(ds.next());
        assertEquals("Row[values=[1, null]]", ds.getRow().toString());
        assertEquals("java.lang.Integer", ds.getRow().getValue(0).getClass().getName());
        assertTrue(ds.next());
        assertEquals("Row[values=[2, 2011-12-21]]", ds.getRow().toString());
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        }
        JdbcDataContext dc = new JdbcDataContext(getConnection(), TableType.DEFAULT_TABLE_TYPES, DATABASE_NAME);
        IQueryRewriter queryRewriter = dc.getQueryRewriter();
        assertSame(SQLServerQueryRewriter.class, queryRewriter.getClass());

        Query q = dc.query().from("Production", "Product").select("Name").where("Color").eq("R'ed").toQuery();

        DataSet ds = dc.executeQuery(q);
        assertNotNull(ds);
        assertFalse(ds.next());
        ds.close();
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    });

    assertTrue(dc.getColumnByQualifiedLabel("test_table.id").isPrimaryKey());
    assertFalse(dc.getColumnByQualifiedLabel("test_table.birthdate").isPrimaryKey());

    DataSet ds = dc.query().from("test_table").select("id").and("birthdate").execute();
    assertTrue(ds.next());
    assertEquals("Row[values=[1, null]]", ds.getRow().toString());
    assertEquals("java.lang.Integer", ds.getRow().getValue(0).getClass().getName());
    assertTrue(ds.next());
    assertEquals("Row[values=[2, 2011-12-21]]", ds.getRow().toString());
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        JdbcDataContext dc = createLimitAndOffsetTestData();
        Schema schema = dc.getDefaultSchema();
        Table productsTable = schema.getTableByName("test_table");

        DataSet ds = dc.query().from(productsTable).select("foo").limit(2).execute();
        assertTrue(ds.next());
        assertEquals("Row[values=[1]]", ds.getRow().toString());
        assertTrue(ds.next());
        assertEquals("Row[values=[2]]", ds.getRow().toString());
        assertFalse(ds.next());
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        JdbcDataContext dc = createLimitAndOffsetTestData();
        Schema schema = dc.getDefaultSchema();
        Table productsTable = schema.getTableByName("test_table");

        DataSet ds = dc.query().from(productsTable).select("foo").offset(1).execute();
        assertTrue(ds.next());
        assertEquals("Row[values=[2]]", ds.getRow().toString());
        assertTrue(ds.next());
        assertEquals("Row[values=[3]]", ds.getRow().toString());
        assertFalse(ds.next());
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