@Override
    public String toString() {
        return null == schemaName.toString() ? tableName.toString() : String.join(".", schemaName.toString(), tableName.toString());
    }
@Test
    void assertToString() {
        CaseInsensitiveQualifiedTable actual = new CaseInsensitiveQualifiedTable(new CaseInsensitiveIdentifier(null), new CaseInsensitiveIdentifier("t_order"));
        assertThat(actual.toString(), is("t_order"));
    }