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help / color / mirror / Atom feedFrom: Alexander Lakhin <[email protected]>
To: Amit Langote <[email protected]>
To: Tomas Vondra <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Daniel Gustafsson <[email protected]>
Cc: David Rowley <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Thom Brown <[email protected]>
Cc: Tom Lane <[email protected]>
Subject: Re: generic plans and "initial" pruning
Date: Sat, 22 Feb 2025 17:00:01 +0200
Message-ID: <[email protected]> (raw)
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Hello Amit,
21.02.2025 05:40, Amit Langote wrote:
> I pushed the final piece yesterday.
Please look at new error, produced by the following script,
starting from 525392d57:
CREATE TABLE t(id int) PARTITION BY RANGE (id);
CREATE INDEX idx on t(id);
CREATE TABLE tp_1 PARTITION OF t FOR VALUES FROM (10) TO (20);
CREATE TABLE tp_2 PARTITION OF t FOR VALUES FROM (20) TO (30) PARTITION BY RANGE(id);
CREATE TABLE tp_2_1 PARTITION OF tp_2 FOR VALUES FROM (21) to (22);
CREATE TABLE tp_2_2 PARTITION OF tp_2 FOR VALUES FROM (22) to (23);
CREATE FUNCTION stable_one() RETURNS INT AS $$ BEGIN RETURN 1; END; $$ LANGUAGE plpgsql STABLE;
SELECT min(id) OVER (PARTITION BY id ORDER BY id) FROM t WHERE id >= stable_one();
ERROR: XX000: trying to open a pruned relation
LOCATION: ExecGetRangeTableRelation, execUtils.c:830
This issue was discovered with SQLsmith.
Best regards,
Alexander Lakhin
Neon (https://neon.tech)
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Subject: Re: generic plans and "initial" pruning
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