@Override
    public SQLXML getSQLXML(final int columnIndex) throws SQLException {
        return (SQLXML) mergeResultSet.getValue(columnIndex, SQLXML.class);
    }
@Test
    void assertGetSQLXMLWithColumnLabel() throws SQLException {
        SQLXML sqlxml = mock(SQLXML.class);
        when(mergeResultSet.getValue(1, SQLXML.class)).thenReturn(sqlxml);
        assertThat(shardingSphereResultSet.getSQLXML("label"), is(sqlxml));
    }