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+--
+-- Perl Weekly Challenge 219
+-- Task 1
+--
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-219/>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc219;
+
+CREATE OR REPLACE FUNCTION
+pwc219.task1_plpgsql( n int[] )
+RETURNS SETOF int
+AS $CODE$
+   SELECT v * v
+   FROM unnest( n ) v
+   ORDER BY 1
+$CODE$
+LANGUAGE sql;