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2020-04-03
13:39
Do not suppress errors when resolving references in an ORDER BY clause belonging to a compound SELECT within a view or trigger within ALTER TABLE. Fix for ticket [a10a14e9b4ba2]. Also, in the event of a semantic error in an aggregate query, early-out the resetAccumulator() function to prevent problems due to incomplete or incorrect initialization of the AggInfo object. Fix for ticket [af4556bb5c285c08]. (check-in: b6467491 user: drh tags: branch-3.31)
13:19 Fixed ticket [af4556bb]: Segfault while trying to prepare a malformed window-function query plus 5 other changes (artifact: 2a937ba0 user: drh)
13:19
In the event of a semantic error in an aggregate query, early-out the resetAccumulator() function to prevent problems due to incomplete or incorrect initialization of the AggInfo object. Fix for ticket [af4556bb5c285c08]. (check-in: 4a302b42 user: drh tags: trunk)
11:45 New ticket [af4556bb] Segfault while trying to prepare a malformed window-function query. (artifact: f36b87cd user: drh)

Ticket Hash: af4556bb5c285c0800b837ab60802c707ec635c1
Title: Segfault while trying to prepare a malformed window-function query
Status: Fixed Type: Code_Defect
Severity: Important Priority: Low
Subsystem: Unknown Resolution: Fixed
Last Modified: 2020-04-03 13:19:17
Version Found In: 3.31.1
User Comments:
drh added on 2020-04-03 11:45:52:

Henry Liu of Shenzhen Ankki Technologies Co.Ltd. sends in the following SQL snippet that causes a segfault while preparing.

<blockquuote>

CREATE TABLE a(b, c);
SELECT c FROM a GROUP BY c
    HAVING(SELECT(sum(b) OVER(ORDER BY b),
                  sum(b) OVER(PARTITION BY min(DISTINCT c), c ORDER BY b)));

This query has caused problems ever since support for window functions was added on 2018-06-30 (version 3.25.0). The problem expressed as an assertion fault up until check-in [712e47714863a8ed] (2019-08-10) at which point it began to segfault.