regression-test/suites/correctness_p0/test_grouping_with_alias.groovy

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 //   http://www.apache.org/licenses/LICENSE-2.0
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 suite("test_grouping_with_alias") {
     qt_select """ 
        select
        coalesce(col1, 'all') as col1,
        count(*) as cnt
        from
        (
            select
                null as col1
            union all
            select
                'a' as col1
        ) t
        group by
        grouping sets ((col1),())
        order by
        col1,
        cnt;
     """
 }