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--
-- Perl Weekly Challenge 333
-- Task 2
-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-333>
--
CREATE SCHEMA IF NOT EXISTS pwc333;
CREATE OR REPLACE FUNCTION
pwc333.task2_plpgsql( n int[] )
RETURNS SETOF int
AS $CODE$
DECLARE
v int;
l int;
BEGIN
l := array_length( n, 1 );
FOREACH v IN ARRAY n LOOP
IF l = 0 THEN
RETURN;
END IF;
RETURN NEXT v;
l := l - 1;
IF l = 0 THEN
RETURN;
END IF;
IF v = 0 THEN
RETURN NEXT v;
l := l - 1;
END IF;
END LOOP;
RETURN;
END
$CODE$
LANGUAGE plpgsql;
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