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-- Perl Weekly Challenge 170
-- Task 1
CREATE SCHEMA IF NOT EXISTS pwc170;
CREATE OR REPLACE FUNCTION
pwc170.is_prime( v bigint )
RETURNS bool
AS $code$
DECLARE
i bigint;
BEGIN
FOR i IN 2 .. v - 1 LOOP
IF v % i = 0 THEN
RETURN false;
END IF;
END LOOP;
RETURN TRUE;
END
$code$
LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION
pwc170.task1_plpgsql( l int default 10 )
RETURNS SETOF INT
AS $CODE$
DECLARE
v bigint := 1;
i bigint;
BEGIN
FOR i IN SELECT n FROM generate_series( 1, 100000 ) n LOOP
IF pwc170.is_prime( i ) THEN
v := v * i;
l := l - 1;
RETURN NEXT v;
END IF;
IF l <= 0 THEN
RETURN;
END IF;
END LOOP;
RETURN;
END
$CODE$
LANGUAGE plpgsql;
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