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CREATE FUNCTION test(a anyarray, t anyrange) RETURNS anymultirange AS $$ BEGIN return NULL::datemultirange; END; $$ LANGUAGE plpgsql; WITH i AS ( SELECT ARRAY[ daterange('2023-01-01', '2023-02-01'), daterange('2023-05-01', '2023-09-01') ]::daterange[] x ) --SELECT lower(range_agg(t.x)) FROM (SELECT unnest(i.x) x FROM i) t; --SELECT test() SELECT 1;

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