-- This file and its contents are licensed under the Apache License 2.0.
-- Please see the included NOTICE for copyright information and
-- LICENSE-APACHE for a copy of the license.
\set PREFIX 'EXPLAIN (BUFFERS OFF, COSTS OFF) '
CREATE TABLE order_test(time int NOT NULL, device_id int, value float);
CREATE INDEX ON order_test(time,device_id);
CREATE INDEX ON order_test(device_id,time);
SELECT create_hypertable('order_test','time',chunk_time_interval:=1000);
    create_hypertable    
-------------------------
 (1,public,order_test,t)

INSERT INTO order_test SELECT 0,10,0.5;
INSERT INTO order_test SELECT 1,9,0.5;
INSERT INTO order_test SELECT 2,8,0.5;
-- we want to see here that index scans are possible for the chosen expressions
-- so we disable seqscan so we dont need to worry about other factors which would
-- make PostgreSQL prefer seqscan over index scan
SET enable_seqscan TO off;
-- test sort optimization with single member order by
SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 1;
 time_bucket | device_id | value 
-------------+-----------+-------
           0 |        10 |   0.5
           0 |         9 |   0.5
           0 |         8 |   0.5

-- should use index scan
:PREFIX SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 1;
--- QUERY PLAN ---
 Result
   ->  Index Scan Backward using _hyper_1_1_chunk_order_test_time_idx on _hyper_1_1_chunk

-- test sort optimization with ordering by multiple columns and time_bucket not last
SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 1,2;
 time_bucket | device_id | value 
-------------+-----------+-------
           0 |         8 |   0.5
           0 |         9 |   0.5
           0 |        10 |   0.5

SET enable_seqscan TO default;
-- must not use index scan
:PREFIX SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 1,2;
--- QUERY PLAN ---
 Sort
   Sort Key: (time_bucket(10, _hyper_1_1_chunk."time")), _hyper_1_1_chunk.device_id
   ->  Result
         ->  Seq Scan on _hyper_1_1_chunk

SET enable_seqscan TO off;
-- test sort optimization with ordering by multiple columns and time_bucket as last member
SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 2,1;
 time_bucket | device_id | value 
-------------+-----------+-------
           0 |         8 |   0.5
           0 |         9 |   0.5
           0 |        10 |   0.5

-- should use index scan
:PREFIX SELECT time_bucket(10,time),device_id,value FROM order_test ORDER BY 2,1;
--- QUERY PLAN ---
 Result
   ->  Index Scan using _hyper_1_1_chunk_order_test_device_id_time_idx on _hyper_1_1_chunk

-- test sort optimization with interval calculation with non-fixed interval
-- #7097
CREATE TABLE i7097_1(time timestamptz NOT NULL, quantity float, "isText" boolean);
CREATE TABLE i7097_2(time timestamptz NOT NULL, quantity float, "isText" boolean);
CREATE INDEX ON i7097_1(time) WHERE "isText" IS NULL;
CREATE INDEX ON i7097_2(time) WHERE "isText" IS NULL;
SELECT table_name FROM create_hypertable('i7097_1', 'time', create_default_indexes => false);
 table_name 
------------
 i7097_1

SELECT table_name FROM create_hypertable('i7097_2', 'time', create_default_indexes => false);
 table_name 
------------
 i7097_2

INSERT INTO i7097_1(time, quantity)
SELECT time, round((random() * (100-3) + 3)::NUMERIC) AS quantity
FROM generate_series('2023-01-01T00:00:00+01:00', '2023-05-01T00:00:00+01:00', interval 'PT10M') AS t(time);
INSERT INTO i7097_2(time, quantity)
SELECT time, round((random() * (100-3) + 3)::NUMERIC) AS quantity
FROM generate_series('2023-01-01T00:00:00+01:00', '2023-05-01T00:00:00+01:00', interval 'PT10M') AS t(time);
VACUUM ANALYZE i7097_1, i7097_2;
SET TIME ZONE 'Europe/Paris';
WITH
"cte1" AS (SELECT time + interval 'P1Y' AS time, avg(quantity) AS quantity FROM i7097_1 WHERE time >= '2024-03-31T00:00:00+01:00'::timestamptz - interval 'P1Y' AND time < '2024-03-31T23:59:59+02:00'::timestamptz + (- interval 'P1Y') AND "isText" IS NULL GROUP BY 1 ORDER BY 1 ASC),
"cte2" AS (SELECT time + interval 'P1Y' AS time, avg(quantity) AS quantity FROM i7097_2 WHERE time >= '2024-03-31T00:00:00+01:00'::timestamptz - interval 'P1Y' AND time < '2024-03-31T23:59:59+02:00'::timestamptz + (- interval 'P1Y') AND "isText" IS NULL GROUP BY 1 ORDER BY 1 ASC)
SELECT count(*) FROM (SELECT time, cte1.quantity + cte2.quantity FROM cte1 FULL OUTER JOIN cte2 USING (time)) j;
 count 
-------
   138

-- github issue 9214
-- test off-by one error in sort optimization
CREATE TABLE i9214(time timestamptz NOT NULL, machine_id INT NOT NULL, name TEXT NOT NULL, value FLOAT NOT NULL) WITH (tsdb.hypertable);
NOTICE:  using column "time" as partitioning column
INSERT INTO i9214
VALUES
('2026-01-30 10:00:00+00', 1, 'tag1', 10.5),
('2026-01-30 10:00:00+00', 1, 'tag2', 20.5),
('2026-01-30 10:01:00+00', 1, 'tag1', 11.0),
('2026-01-30 10:01:00+00', 1, 'tag2', 21.0);
WITH rule1 AS (
  SELECT date_trunc('minute', time) AS time, machine_id FROM i9214 WHERE machine_id = 1 AND name = 'tag1' AND value > 5
), row_numbered AS (
  SELECT time, machine_id, row_number() OVER (ORDER BY time) AS seqnum FROM rule1
)
SELECT min(time) AS start_time, machine_id, count(*) AS duration_minutes
FROM row_numbered
GROUP BY machine_id, (time - (seqnum * interval '1 minute'))
ORDER BY min(time);
          start_time          | machine_id | duration_minutes 
------------------------------+------------+------------------
 Fri Jan 30 11:00:00 2026 CET |          1 |                2

WITH rule1 AS (
	SELECT date_trunc('minute', time) AS time, machine_id FROM i9214 WHERE machine_id = 1 AND name = 'tag1' AND value > 5
), rule2 AS (
  SELECT date_trunc('minute', time) AS time, machine_id FROM i9214 WHERE machine_id = 1 AND name = 'tag2' AND value > 5
), joined_rules AS (
  SELECT r1.time, r1.machine_id FROM rule1 r1 INNER JOIN rule2 r2 USING(time,machine_id)
), row_numbered AS (
  SELECT time, machine_id, row_number() OVER (ORDER BY time) AS seqnum FROM joined_rules
)
SELECT min(time) AS start_time, machine_id, count(*) AS duration_minutes
FROM row_numbered
GROUP BY machine_id, (time - (seqnum * interval '1 minute'))
ORDER BY min(time);
          start_time          | machine_id | duration_minutes 
------------------------------+------------+------------------
 Fri Jan 30 11:00:00 2026 CET |          1 |                2

