yql/essentials/tests/sql/suites/intersect/intersect_all_empty.sql


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SELECT
    *
FROM
    as_table([])
INTERSECT ALL
SELECT
    *
FROM
    as_table([])
;

SELECT
    *
FROM
    as_table([])
INTERSECT ALL
SELECT
    1 AS x,
    2 AS y
;

SELECT
    1 AS x,
    2 AS y
INTERSECT ALL
SELECT
    *
FROM
    as_table([])
;