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-rw-r--r--challenge-196/luca-ferrari/postgresql/ch-2.sql35
1 files changed, 35 insertions, 0 deletions
diff --git a/challenge-196/luca-ferrari/postgresql/ch-2.sql b/challenge-196/luca-ferrari/postgresql/ch-2.sql
new file mode 100644
index 0000000000..434ac42b31
--- /dev/null
+++ b/challenge-196/luca-ferrari/postgresql/ch-2.sql
@@ -0,0 +1,35 @@
+-- Perl Weekly Challenge 196
+-- Task 2
+
+CREATE SCHEMA IF NOT EXISTS pwc196;
+
+CREATE OR REPLACE FUNCTION
+pwc196.task2_plpgsql( l int[])
+RETURNS SETOF int[]
+AS $CODE$
+DECLARE
+ c_start int := 0;
+ c_end int := 0;
+BEGIN
+
+ FOR i IN 0 .. array_length( l, 1 ) LOOP
+ IF i < c_end THEN
+ CONTINUE;
+ END IF;
+
+ c_start := i;
+ c_end := c_start;
+
+ WHILE c_end < array_length( l, 1 ) AND l[ c_end + 1 ] = l[ c_end ] + 1 LOOP
+ c_end := c_end + 1;
+ END LOOP;
+
+ IF c_start < c_end THEN
+ RETURN NEXT ARRAY[ c_start, c_end ]::int[];
+ END IF;
+ END LOOP;
+
+RETURN;
+END
+$CODE$
+LANGUAGE plpgsql;