Task 1 plpgsql done

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diff --git a/challenge-196/luca-ferrari/postgresql/ch-1.sql b/challenge-196/luca-ferrari/postgresql/ch-1.sql
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+-- Perl Weekly Challenge 196
+-- Task 1
+
+CREATE SCHEMA IF NOT EXISTS pwc196;
+
+CREATE OR REPLACE FUNCTION
+pwc196.task1_plpgsql( l int[] )
+RETURNS SETOF int[]
+AS $CODE$
+DECLARE
+	last_index int := 0;
+BEGIN
+
+	FOR i IN 1 .. array_length(l,1) - 1 LOOP
+	    IF i <= last_index THEN
+	       CONTINUE;
+	    END IF;
+
+	    IF l[ i - 1 ] < l[ i ] AND l[ i ] < l[ i + 1 ] THEN
+	       RETURN NEXT ARRAY[ l[i-1], l[i], l[i + 1] ]::int[];
+	       last_index := i + 1;
+	    END IF;
+	END LOOP;
+RETURN;
+END
+$CODE$
+LANGUAGE plpgsql;