Task 2 ppgsql done

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diff --git a/challenge-185/luca-ferrari/postgresql/ch-2.sql b/challenge-185/luca-ferrari/postgresql/ch-2.sql
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+-- Perl Weekly Challenge 185
+-- Task 2
+
+CREATE SCHEMA IF NOT EXISTS pwc185;
+
+CREATE OR REPLACE FUNCTION
+pwc185.task2_plpgsql( code text )
+RETURNS text
+AS $CODE$
+DECLARE
+        how_many int := 4;
+        d char;
+        code_out text := '';
+BEGIN
+        FOREACH d IN ARRAY regexp_split_to_array( code, '' ) LOOP
+                IF how_many = 0 OR d !~ '\w'  THEN
+                   code_out := code_out || d;
+                   CONTINUE;
+               ELSEIF how_many > 0 AND d ~ '\w' THEN
+                    code_out := code_out || 'x';
+                    how_many := how_many - 1;
+
+               ELSE
+                    code_out := code_out || d;
+               END IF;
+        END LOOP;
+
+RETURN code_out;
+END
+$CODE$
+LANGUAGE plpgsql;