challenge-263/luca-ferrari/plpgsql/ch-1.sql


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--
-- Perl Weekly Challenge 263
-- Task 1
-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-263>
--

CREATE SCHEMA IF NOT EXISTS pwc263;

CREATE OR REPLACE FUNCTION
pwc263.task1_plpgsql( k int, nums int[] )
RETURNS SETOF int
AS $CODE$

   SELECT x
   FROM (
   	SELECT v, row_number() over ( order by v ) as x
	FROM unnest( nums ) v
	WHERE v = k
	)
$CODE$
LANGUAGE sql;