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Bug#56716 InnoDB locks a record gap without locking the table

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row_search_for_mysql(): Acquire an intention lock on the table
before locking the first record gap.
This commit is contained in:
Marko Mäkelä
2010-10-04 13:06:41 +03:00
parent 678bc90ed8
commit 190ebda206
4 changed files with 55 additions and 36 deletions
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10
mysql-test/suite/innodb_plugin/t/innodb_bug56716.test Normal file
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#
# Bug #56716 InnoDB locks a record gap without locking the table
#
-- source include/have_innodb_plugin.inc
CREATE TABLE bug56716 (a INT PRIMARY KEY,b INT,c INT,INDEX(b)) ENGINE=InnoDB;
SELECT * FROM bug56716 WHERE b<=42 ORDER BY b DESC FOR UPDATE;
DROP TABLE bug56716;