adding fields to allow for multiple playlists scheduled in a show

build/sql/triggers.sql

@@ -21,3 +21,27 @@ CREATE FUNCTION calculate_position() RETURNS trigger AS
 
 CREATE TRIGGER calculate_position AFTER INSERT OR DELETE ON cc_playlistcontents
 FOR EACH ROW EXECUTE PROCEDURE calculate_position();
+
+----------------------------------------------------------------------------------
+--show_content()
+----------------------------------------------------------------------------------
+DROP FUNCTION show_content() CASCADE;
+
+CREATE FUNCTION show_content() RETURNS trigger AS
+    '
+    BEGIN
+    	IF(TG_OP=''INSERT'') THEN
+        	UPDATE cc_show_schedule SET position = (position + 1) 
+		WHERE (id = new.id AND position >= new.position AND id != new.id);
+        END IF;
+        IF(TG_OP=''DELETE'') THEN
+        	UPDATE cc_show_schedule SET position = (position - 1) 
+		WHERE (id = old.id AND position > old.position);
+        END IF;
+        RETURN NULL;
+    END;
+    '
+	LANGUAGE 'plpgsql';
+
+CREATE TRIGGER show_content AFTER INSERT OR DELETE ON cc_show_schedule
+FOR EACH ROW EXECUTE PROCEDURE show_content();