CREATE TABLE bugtable (
    inserted timestamptz not null default now(),
    value double precision
);

SELECT create_hypertable(
    'bugtable',
    'inserted',
    chunk_time_interval => interval '1 minute'
);

-- Some dummy data
INSERT INTO
    bugtable
SELECT
    now() - random() * interval '10 minutes'
FROM
    generate_series(1,100);

ALTER TABLE bugtable SET (
  timescaledb.compress
);

SELECT add_compress_chunks_policy(
    'bugtable',
    INTERVAL '1' MINUTE
);

-- ERROR:  XX000: chunk not found
-- LOCATION:  chunk_scan_find, chunk.c:1585
--
-- This problem already occurs when running `EXPLAIN (ANALYZE OFF)` on the query
UPDATE
    bugtable
SET
    value = NULL
WHERE
    inserted = (
        SELECT
            max(inserted)
          FROM 
            bugtable
          WHERE
            inserted > now() - interval '10 seconds'
    )
    AND inserted > now() - interval '10 seconds';

-- Different type of query, but same result

-- ERROR:  XX000: chunk not found
-- LOCATION:  chunk_scan_find, chunk.c:1585
WITH my_cte(max) AS (
    SELECT
        max(inserted)
    FROM
        bugtable
    WHERE
        inserted > now() - interval '10 seconds'
)
UPDATE
    bugtable
SET
    value = NULL
FROM
    my_cte
WHERE
    inserted = max;

-- However, when splitting up the queries and using an intermediate variable, the query runs fine
DO $$
DECLARE
    max timestamptz;
    count bigint;
BEGIN
    SELECT
        max(inserted)
    INTO
        max
    FROM
        bugtable
    WHERE
        inserted < now() - interval '10 minutes';

    UPDATE
        bugtable
    SET
        value = NULL
    WHERE
        inserted = MAX
        AND inserted < now() - interval '10 minutes';

    GET DIAGNOSTICS count = ROW_COUNT;

    RAISE NOTICE 'Updated % rows', count;
END;
$$;