Examples of java.sql.ResultSet

java.sql.ResultSet
esultSet will be both scrollable and updateable
The ResultSet interface provides a series of methods for retrieving data from columns in the current row, such as getDate, getFloat. The columns are identified either by their index number (starting at 1) or by their name - there are separate methods for both techniques of column addressing. The column names are case insensitive. If several columns have the same name, then the getter methods use the first matching column. This means that if column names are used, it is not possible to guarantee that the name will retrieve data from the intended column - for certainty it is better to use column indexes. Ideally the columns should be read left-to-right and read once only, since not all * databases are optimised to handle other techniques of reading the data.
When reading data, the JDBC driver maps the SQL data retrieved from the database to the Java type implied by the method invoked by the application. The JDBC specification has a table of allowable mappings from SQL types to Java types.
There are also methods for writing data into the ResultSet, such as updateInt, updateString. The update methods can be used either to modify the data of an existing row or to insert new data rows into the ResultSet. Modification of existing data involves moving the Cursor to the row which needs modification and then using the update methods to modify the data, followed by calling the ResultSet.updateRow method. For insertion of new rows, the cursor is first moved to a special row called the Insert Row, data is added using the update methods, followed by calling the ResultSet.insertRow method.
A ResultSet is closed if the Statement object which generated it closed, executed again or is used to retrieve the next result from a sequence of results.

        // child of v2
        stat.execute("create view v3 as select * from v2");
    }


    private void checkViewRemainsValid() throws SQLException {
        ResultSet rs = stat.executeQuery("select b from v1");
        assertTrue(rs.next());
        assertEquals(1, rs.getInt(1));
        assertFalse(rs.next());


        rs = stat.executeQuery("select b from v2");
        assertTrue(rs.next());
        assertEquals(1, rs.getInt(1));
        assertFalse(rs.next());


        rs = stat.executeQuery("select b from test");
        assertTrue(rs.next());
        assertEquals(2, rs.getInt(1));
        assertFalse(rs.next());


        stat.execute("drop table test cascade");


        ResultSet d = conn.getMetaData().getTables(null, null, null, null);
        while (d.next()) {
            // should have no tables left in the database
            assertEquals(d.getString(2) + "." + d.getString(3),
                    "INFORMATION_SCHEMA", d.getString(2));
        }
    }

View Full Code Here

      connection.close();
    }


    @Test public void testViewMetadataRepositoryMerge() throws Exception {
      Statement s = connection.createStatement();
      ResultSet rs = s.executeQuery("select * from vw");
      rs.next();
      assertEquals(2011, rs.getInt(1));
    }

View Full Code Here

      s.execute("delete from vw");
    }
    
    @Test public void testProcMetadataRepositoryMerge() throws Exception {
      Statement s = connection.createStatement();
      ResultSet rs = s.executeQuery("call proc(1)");
      rs.next();
      assertEquals(2011, rs.getInt(1));
    }

View Full Code Here

      CallableStatement s = connection.prepareCall("{? = call sysadmin.setProperty((select uid from tables where name='vw'), 'foo', 'bar')}");
      assertFalse(s.execute());
      assertNull(s.getClob(1));
      
      Statement stmt = connection.createStatement();
      ResultSet rs = stmt.executeQuery("select name, \"value\" from properties where uid = (select uid from tables where name='vw')");
      rs.next();
      assertEquals("foo", rs.getString(1));
      assertEquals("bar", rs.getString(2));
    }

View Full Code Here

      s.execute();
    }
    
    @Test public void testAlterView() throws Exception {
      Statement s = connection.createStatement();
      ResultSet rs = s.executeQuery("select * from vw");
      rs.next();
      assertEquals(2011, rs.getInt(1));
      
      assertFalse(s.execute("alter view vw as select '2012'"));
      
      rs = s.executeQuery("select * from vw");
      rs.next();
      assertEquals(2012, rs.getInt(1));
    }

View Full Code Here

      assertEquals(2012, rs.getInt(1));
    }
    
    @Test public void testAlterProcedure() throws Exception {
      Statement s = connection.createStatement();
      ResultSet rs = s.executeQuery("call proc(1)");
      rs.next();
      assertEquals(2011, rs.getInt(1));
      
      assertFalse(s.execute("alter procedure proc as begin select '2012'; end"));
      
      //the sleep is needed to ensure that the plan is invalidated
      Thread.sleep(100); 
      
      rs = s.executeQuery("call proc(1)");
      rs.next();
      assertEquals(2012, rs.getInt(1));
    }

View Full Code Here

                }
                TimeZone.setDefault(target);
                DateTimeUtils.resetCalendar();
                conn = getConnection(db);
                stat = conn.createStatement();
                ResultSet rs = stat.executeQuery("select * from date_list order by t");
                while (rs.next()) {
                    String source = rs.getString(1);
                    String a = rs.getString(2);
                    String b = rs.getString(3);
                    b = b.substring(0, a.length());
                    if (!a.equals(b)) {
                        assertEquals(source + ">" + target, a, b);
                    }
                }

View Full Code Here

        if (!date.toString().equals(s)) {
            println(TimeZone.getDefault().getID() + " " + s + " <> " + date.toString());
            return;
        }
        prep.setString(1, s);
        ResultSet rs = prep.executeQuery();
        rs.next();
        String t = rs.getString(1);
        if (!s.equals(t)) {
            assertEquals(TimeZone.getDefault().getID(), s, t);
        }
    }

View Full Code Here

                prep.setInt(2, random.nextInt(10));
                prep.execute();
            } else {
                PreparedStatement prep = conn.prepareStatement("select * from news where id = ?");
                prep.setInt(1, random.nextInt(getNewsCount()));
                ResultSet rs = prep.executeQuery();
                if (!rs.next()) {
                    System.out.println("No row found");
                    // throw new AssertionError("No row found");
                }
                if (rs.next()) {
                    System.out.println("Multiple rows found");
                    // throw new AssertionError("Multiple rows found");
                }
            }
        }

View Full Code Here

        PreparedStatement prep = conn.prepareStatement("insert into orders(customer_id , total) values(?, ?)");
        prep.setInt(1, random.nextInt(getCustomerCount()));
        BigDecimal total = new BigDecimal("0");
        prep.setBigDecimal(2, total);
        prep.executeUpdate();
        ResultSet rs = prep.getGeneratedKeys();
        rs.next();
        int orderId = rs.getInt(1);
        int lines = random.nextInt(20);
        for (int i = 0; i < lines; i++) {
            insertLine.setInt(1, orderId);
            insertLine.setInt(2, i);
            insertLine.setString(3, ITEMS[random.nextInt(ITEMS.length)]);

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of java.sql.ResultSet

co.nubetech.hiho.job.TestExportToDB

co.nubetech.hiho.job.TestExportToMySQLDB

com.alibaba.wasp.jdbc.TestJdbcBase

com.alibaba.wasp.jdbc.TestJdbcResultSet

com.alibaba.wasp.jdbc.TestPreparedStatement

com.emc.plants.service.impl.ReportGeneratorBean

com.github.zathrus_writer.commandsex.CommandsEX

com.github.zathrus_writer.commandsex.helpers.Bans

com.github.zathrus_writer.commandsex.helpers.Econ

com.github.zathrus_writer.commandsex.helpers.Home

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.