Examples of java.sql.PreparedStatement.executeUpdate()

java.sql.PreparedStatement.executeUpdate()
Invoke the SQL command contained within the Prepared Statement. This must be INSERT, UPDATE, DELETE, or a command that returns nothing. @return the count of rows for INSERT, UPDATE or DELETE statements, 0 forstatements that return nothing @throws SQLException if a database error happens or if the SQL statement returns a ResultSet.

        Connection conn = getConnection("pageStore");
        conn.createStatement().execute("create table test(id varchar primary key, d varchar)");
        PreparedStatement prep = conn.prepareStatement("insert into test values(?, space(500))");
        for (int i = 0; i < 20000; i++) {
            prep.setString(1, "" + i);
            prep.executeUpdate();
        }
        conn.close();
    }


    private void testUniqueIndex() throws SQLException {

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        p.clearParameters();
        p.setLong(1, 0);
        assertEquals(1, p.executeUpdate());
        p.clearParameters();
        p.setLong(1, 1);
        assertEquals(1, p.executeUpdate());
        ResultSet rs = u.executeQuery();
        assertTrue(rs.next());
        assertEquals(0, rs.getInt(1));
        assertTrue(rs.getBoolean(2));
        assertTrue(rs.next());

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        stat.execute("CREATE TABLE T_DATETIME(ID INT PRIMARY KEY,VALUE DATETIME)");
        prep = conn.prepareStatement("INSERT INTO T_INT VALUES(?,?)", ResultSet.TYPE_FORWARD_ONLY,
                ResultSet.CONCUR_READ_ONLY);
        prep.setInt(1, 1);
        prep.setInt(2, 0);
        prep.executeUpdate();
        prep.setInt(1, 2);
        prep.setInt(2, -1);
        prep.executeUpdate();
        prep.setInt(1, 3);
        prep.setInt(2, 3);

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        prep.setInt(1, 1);
        prep.setInt(2, 0);
        prep.executeUpdate();
        prep.setInt(1, 2);
        prep.setInt(2, -1);
        prep.executeUpdate();
        prep.setInt(1, 3);
        prep.setInt(2, 3);
        prep.executeUpdate();
        prep.setInt(1, 4);
        prep.setNull(2, Types.INTEGER);

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        prep.setInt(1, 2);
        prep.setInt(2, -1);
        prep.executeUpdate();
        prep.setInt(1, 3);
        prep.setInt(2, 3);
        prep.executeUpdate();
        prep.setInt(1, 4);
        prep.setNull(2, Types.INTEGER);
        prep.executeUpdate();
        prep.setInt(1, 5);
        prep.setBigDecimal(2, new java.math.BigDecimal("0"));

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        prep.setInt(1, 3);
        prep.setInt(2, 3);
        prep.executeUpdate();
        prep.setInt(1, 4);
        prep.setNull(2, Types.INTEGER);
        prep.executeUpdate();
        prep.setInt(1, 5);
        prep.setBigDecimal(2, new java.math.BigDecimal("0"));
        prep.executeUpdate();
        prep.setInt(1, 6);
        prep.setString(2, "-1");

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        prep.setInt(1, 4);
        prep.setNull(2, Types.INTEGER);
        prep.executeUpdate();
        prep.setInt(1, 5);
        prep.setBigDecimal(2, new java.math.BigDecimal("0"));
        prep.executeUpdate();
        prep.setInt(1, 6);
        prep.setString(2, "-1");
        prep.executeUpdate();
        prep.setInt(1, 7);
        prep.setObject(2, new Integer(3));

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        prep.setInt(1, 5);
        prep.setBigDecimal(2, new java.math.BigDecimal("0"));
        prep.executeUpdate();
        prep.setInt(1, 6);
        prep.setString(2, "-1");
        prep.executeUpdate();
        prep.setInt(1, 7);
        prep.setObject(2, new Integer(3));
        prep.executeUpdate();
        prep.setObject(1, "8");
        // should throw an exception

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        prep.setInt(1, 6);
        prep.setString(2, "-1");
        prep.executeUpdate();
        prep.setInt(1, 7);
        prep.setObject(2, new Integer(3));
        prep.executeUpdate();
        prep.setObject(1, "8");
        // should throw an exception
        prep.setObject(2, null);
        // some databases don't allow calling setObject with null (no data type)
        prep.executeUpdate();

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        prep.executeUpdate();
        prep.setObject(1, "8");
        // should throw an exception
        prep.setObject(2, null);
        // some databases don't allow calling setObject with null (no data type)
        prep.executeUpdate();
        prep.setInt(1, 9);
        prep.setObject(2, -4, Types.VARCHAR);
        prep.executeUpdate();
        prep.setInt(1, 10);
        prep.setObject(2, "5", Types.INTEGER);

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