ydb/yql/essentials/tests/sql/suites/pg/interval_to_pg.sql

select ToPg(cast(0 as interval)),ToPg(cast(4291747199999999l as interval)),ToPg(cast(-4291747199999999l as interval)),
       ToPg(cast(0 as interval64)),ToPg(cast(9223339708799999999l as interval64)),ToPg(cast(-9223339708799999999l as interval64));