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MDEV-28317 Assertion failures in row_undo_mod on recovery

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Starting with 10.3, an assertion would fail on the rollback of
a recovered incomplete transaction if a table definition violates
a FOREIGN KEY constraint.

DICT_ERR_IGNORE_RECOVER_LOCK: Include also DICT_ERR_IGNORE_FK_NOKEY
so that trx_resurrect_table_locks() will be able to load
table definitions and resurrect IX locks. Previously, if the
FOREIGN KEY constraints of a table were incomplete, the table
would fail to load until rollback, and in 10.3 or later an assertion
would fail that the rollback was not protected by a table IX lock.

Thanks to commit 9de2e60d74 there
will be no problems to enforce subsequent FOREIGN KEY operations
even though a table with invalid REFERENCES clause was loaded.
This commit is contained in:
Marko Mäkelä
2022-04-19 12:40:05 +03:00
parent e4e25d2bac
commit 5aef0123a7
3 changed files with 63 additions and 2 deletions
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27
mysql-test/suite/innodb/r/foreign_key.result
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@@ -137,6 +137,33 @@ SELECT unique_constraint_name FROM information_schema.referential_constraints
WHERE table_name = 't2';
unique_constraint_name
PRIMARY
#
# MDEV-28317 Assertion failure on rollback of FOREIGN KEY operation
#
SET foreign_key_checks=0;
CREATE TABLE parent(a INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE child(a INT,FOREIGN KEY(a) REFERENCES parent(a) ON DELETE CASCADE)
ENGINE=InnoDB;
INSERT INTO child VALUES(1);
ALTER TABLE child DROP INDEX a;
connect incomplete, localhost, root,,;
BEGIN;
DELETE FROM child;
connection default;
INSERT INTO parent SET a=0;
FLUSH TABLES;
disconnect incomplete;
INSERT INTO child SET a=0;
INSERT INTO child SET a=1;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
DELETE FROM parent;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
ALTER TABLE child ADD INDEX(a);
DELETE FROM parent;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
ALTER TABLE child FORCE;
DELETE FROM parent;
DROP TABLE child,parent;
SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
SELECT unique_constraint_name FROM information_schema.referential_constraints