From dab80f177240f3d8f6fbdd3b02b7a87fba82f168 Mon Sep 17 00:00:00 2001
From: Dave Morriss <Dave.Morriss@gmail.com>
Date: Mon, 16 Oct 2023 23:01:30 +0100
Subject: [PATCH] Using even more complex CTE query for testing

---
 templates/queries-index-sqlite.tpl.html | 44 +++++++++++++------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/templates/queries-index-sqlite.tpl.html b/templates/queries-index-sqlite.tpl.html
index d18b3ba..a68b526 100644
--- a/templates/queries-index-sqlite.tpl.html
+++ b/templates/queries-index-sqlite.tpl.html
@@ -1,29 +1,31 @@
 <!--% query_next_available_episode = '
-    WITH next_id AS (
-	SELECT id, id + 1 AS id_next, date as last_date
-	FROM eps
-	WHERE eps.date > date(\'now\')
+    WITH RECURSIVE
+    min_id AS (
+	SELECT max(id) AS start_id FROM eps WHERE date <= date(\'now\')
     ),
-    free_slot AS (
+    max_id AS (
+	SELECT max(id) AS end_id FROM eps
+    ),
+    cnt(x) AS (
+	SELECT start_id from min_id
+	UNION ALL
+	SELECT x+1 FROM cnt
+	WHERE x+1 <= (SELECT end_id FROM max_id)
+    ),
+    first_empty AS (
 	SELECT
-	    last_date AS prev_date,
-	    CASE
-		WHEN strftime(\'%w\',last_date) = \'5\'
-		    THEN \'+3 days\'
-		ELSE \'+1 days\'
-	    END AS date_offset,
-	    next_id.id_next AS empty_slot
-	FROM next_id
-	LEFT JOIN eps ON next_id.id_next = eps.id
-	WHERE eps.id IS NULL
-	ORDER BY next_id.id
-	LIMIT 1
+	    cnt.x AS id
+	FROM cnt
+	LEFT JOIN eps e ON cnt.x = e.id
+	WHERE e.id IS NULL
     )
     SELECT
-	empty_slot AS next_id,
-	DATE (prev_date, date_offset) AS next_date,
-	printf(\'%i\',abs(julianday(DATE (prev_date, date_offset)) - julianday(\'now\') + 1)) AS delta_days
-    FROM free_slot
+	fe.id as empty_slot,
+	(SELECT date(eps.date,\'+1 day\') from eps where id = fe.id-1) as slot_date,
+	printf(\'%i\',abs(julianday((SELECT date(eps.date,\'+1 day\') from eps where id = fe.id-1)) - julianday(\'now\') + 1)) AS delta_days
+    FROM first_empty AS fe
+    LEFT JOIN eps e ON fe.id = e.id
+    LIMIT 1
 '
 %-->
 <!--% query_latest_episodes = '