@Override
    public long getLong(final int columnIndex) throws SQLException {
        return (long) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, long.class), long.class);
    }
@Test
    void assertGetLongWithColumnLabel() throws SQLException {
        when(mergeResultSet.getValue(1, long.class)).thenReturn(1L);
        assertThat(shardingSphereResultSet.getLong("label"), is(1L));
    }