PWC 253

Task 1 Raku done
Task 2  Raku done

Task 1 PL/Perl done
Task 2 PL/Perl done

Task 1 PL/PgSQL done
Task 2 PL/PgSQL done

Task 1 Python done
Task 2 Python done

Task 1  PL/Java done
Task 2 PL/Java done

2 files changed, 64 insertions, 0 deletions

diff --git a/challenge-253/luca-ferrari/plpgsql/ch-1.sql b/challenge-253/luca-ferrari/plpgsql/ch-1.sql
new file mode 100644
index 0000000000..78911752d1
--- /dev/null
+++ b/challenge-253/luca-ferrari/plpgsql/ch-1.sql
@@ -0,0 +1,24 @@
+--
+-- Perl Weekly Challenge 253
+-- Task 1
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-253>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc253;
+
+CREATE OR REPLACE FUNCTION
+pwc253.task1_plpgsql( s char, words text[] )
+RETURNS SETOF text
+AS $CODE$
+DECLARE
+	current_word text;
+BEGIN
+	FOREACH current_word IN ARRAY words LOOP
+		RETURN QUERY
+		SELECT regexp_split_to_table( current_word, '[' || s || ']' );
+	END LOOP;
+
+RETURN;
+END
+$CODE$
+LANGUAGE plpgsql;
diff --git a/challenge-253/luca-ferrari/plpgsql/ch-2.sql b/challenge-253/luca-ferrari/plpgsql/ch-2.sql
new file mode 100644
index 0000000000..80971effac
--- /dev/null
+++ b/challenge-253/luca-ferrari/plpgsql/ch-2.sql
@@ -0,0 +1,40 @@
+--
+-- Perl Weekly Challenge 253
+-- Task 2
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-253>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc253;
+
+CREATE OR REPLACE FUNCTION
+pwc253.task2_plpgsql( matrix int[][] )
+RETURNS SETOF int
+AS $CODE$
+DECLARE
+	current_row int[];
+	c_ones int;
+BEGIN
+	CREATE TEMPORARY TABLE IF NOT EXISTS ones( r int, c int );
+	TRUNCATE ones;
+
+	FOR i IN 1 .. array_length( matrix, 1 ) LOOP
+	    c_ones := 0;
+	    FOR j IN 1 .. array_length( matrix, 2 ) LOOP
+	    	c_ones := c_ones + matrix[ i ][ j ];
+	    END LOOP;
+
+    	    INSERT INTO ones
+	    SELECT i, c_ones;
+
+	END LOOP;
+
+	RETURN QUERY
+	SELECT r
+	FROM ones
+	ORDER BY c DESC, r ASC;
+
+
+RETURN;
+END
+$CODE$
+LANGUAGE plpgsql;