@Override
    public int getInt(final int columnIndex) throws SQLException {
        return (int) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, int.class), int.class);
    }
@Test
    void assertGetIntWithColumnIndex() throws SQLException {
        when(mergeResultSet.getValue(1, int.class)).thenReturn(1);
        assertThat(shardingSphereResultSet.getInt(1), is(1));
    }