Merge branch 'master' of https://github.com/manwar/perlweeklychallenge-club

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diff --git a/challenge-191/luca-ferrari/postgresql/ch-1.sql b/challenge-191/luca-ferrari/postgresql/ch-1.sql
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+++ b/challenge-191/luca-ferrari/postgresql/ch-1.sql
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+-- Perl Weekly Challenge 191
+-- Task 1
+
+CREATE SCHEMA IF NOT EXISTS pwc191;
+
+CREATE OR REPLACE FUNCTION
+pwc191.task1_plpgsql( l int[] )
+RETURNS int
+AS $CODE$
+DECLARE
+	current_max int;
+	wrong int := 0;
+BEGIN
+	-- compute the max
+	SELECT max( v )
+	INTO   current_max
+	FROM unnest( l ) v;
+
+	SELECT count(*)
+	INTO   wrong
+	FROM unnest( l ) v
+	WHERE ( v * 2 ) > current_max
+	AND   v <> current_max;
+
+	IF wrong > 0 THEN
+	   RETURN -1;
+        ELSE
+          RETURN 1;
+        END IF;
+
+END
+$CODE$
+LANGUAGE plpgsql;