README.md

@@ -68,4 +68,3 @@ ssh -nNTvL 5432:fsmi-db.fsmi.org:5432 fsmi-login.fsmi.uni-karlsruhe.de
   - [x] Figure out/Add documentation about building `entry.js`
   - [ ] Clean up the code a little and add some comments
   - [ ] Needs good documentation for maintainability
-- [ ] Use cool new function for deactivating items

jon/db/add_views.sql

@@ -74,40 +74,30 @@ LEFT JOIN garfield.inventory_items AS b
       AND b.bought > a.bought
 GROUP BY a.item_id;
 
--- We need to create this table so that we can put an index on it
--- Otherwise the join in the consumption graph query becomes much slower
--- Perhaps it would be nicer to use a materialized view instead
-DROP TABLE IF EXISTS last_n_days;
-CREATE TEMPORARY TABLE last_n_days AS (
-  SELECT
-    generate_series(now() - interval '14 days', now(), interval '1 day')::date AS sale_date
-);
-CREATE UNIQUE INDEX last_n_days_sale_date ON last_n_days (sale_date);
-
 -- Get an array of how often items were sold over the last 14 days
 CREATE TEMPORARY VIEW inventory_last_n_days_sales AS
 WITH
-sales_by_date AS (
+last_n_days AS (
-  SELECT
+  SELECT generate_series(now() - interval '14 days', now(), interval '1 day')::date AS sale_date
-    inventory_line AS item_id,
-    date_trunc('day', snack_sales_log_timestamp AT TIME ZONE 'UTC+1') AS sale_date,
-    count(*)::int AS sales
-  FROM garfield.snack_sales_log
-  GROUP BY item_id, sale_date
 ),
-beeg AS (
+last_n_days_sales AS (
-  SELECT item_id, sale_date, count(snack_sales_log_timestamp)::int AS sales
+  SELECT
+    item_id,
+    sale_date,
+    count(snack_sales_log_timestamp) AS sale_date_sales
   FROM garfield.inventory_items
+  LEFT JOIN garfield.inventory_map ON item_id = inventory_id
+  -- Is there a better way of writing this?
+  -- TODO: Try to speed this query up
   CROSS JOIN last_n_days
   LEFT JOIN garfield.snack_sales_log
-         ON inventory_line = item_id
+         ON inventory_map.snack_id = snack_sales_log.snack_id
--- snack_sales_log has an index on snack_sales_log_timestamp to speed up this query
+        AND DATE_TRUNC('day', snack_sales_log_timestamp) = sale_date
--- If that index doesn't exist the query takes much longer.
-        AND sale_date = date_trunc('day', snack_sales_log_timestamp AT TIME ZONE 'UTC+1')
-  WHERE available
   GROUP BY item_id, sale_date
   ORDER BY item_id, sale_date
 )
-SELECT item_id, array_agg(sales) AS last_n_days_sales
+SELECT
-FROM beeg
+  item_id,
+  array_agg(sale_date_sales) AS last_n_days_sales
+FROM last_n_days_sales
 GROUP BY item_id