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MDEV-27025 allows to insert records before the record on which DELETE is locked, as a result the DELETE misses those records, what causes serious ACID violation. Revert MDEV-27025, MDEV-27550. The test which shows the scenario of ACID violation is added.
21 lines
499 B
Plaintext
21 lines
499 B
Plaintext
CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t VALUES (3);
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BEGIN;
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connection default;
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UPDATE t SET a = 2;
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connect con1,localhost,root;
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DELETE FROM t;
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connection default;
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UPDATE t SET a = 1;
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COMMIT;
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connection con1;
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ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
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disconnect con1;
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connection default;
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# The above DELETE must delete all the rows in the table, so the
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# following SELECT must show 0 rows.
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SELECT count(*) FROM t;
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count(*)
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1
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DROP TABLE t;
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