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MDEV-28806 Assertion `flag == 1' failure in row_build_index_entry_low upon concurrent ALTER and UPDATE

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- During online ADD INDEX, InnoDB was incorrectly writing log for an
UPDATE that does not affect the being-created index.
This commit is contained in:
Thirunarayanan Balathandayuthapani
2022-06-13 21:32:06 +05:30
parent 85c0f4d2de
commit eb7e24932b
4 changed files with 58 additions and 6 deletions
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21
mysql-test/suite/gcol/r/innodb_virtual_debug.result
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@@ -124,3 +124,24 @@ CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
#
# MDEV-28806 Assertion `flag == 1' failure in
# row_build_index_entry_low upon concurrent ALTER and UPDATE
#
CREATE TABLE t1(a CHAR(8), b INT, c INT AS (b), KEY(a)) ENGINE=InnoDB;
INSERT INTO t1(b) VALUES (1),(2);
connect con1,localhost,root,,test;
SET DEBUG_SYNC="alter_table_inplace_before_lock_upgrade SIGNAL dml_start WAIT_FOR dml_commit";
ALTER TABLE t1 ADD KEY ind (c);
connection default;
SET DEBUG_SYNC="now WAIT_FOR dml_start";
UPDATE t1 SET a ='foo';
SET DEBUG_SYNC="now SIGNAL dml_commit";
connection con1;
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
disconnect con1;
connection default;
SET DEBUG_SYNC=RESET;