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SubSelect hit bug
Posted by: Ondrej Prochazka
Date: January 19, 2012 05:11AM

Is this real bug or my misunderstanding of language?

DROP DATABASE IF EXISTS `bug_example`;
CREATE DATABASE `bug_example`;
USE `bug_example`;

CREATE TABLE `foo` (
`id` int
) ENGINE='InnoDB';
INSERT INTO `foo` (`id`) VALUES ('11');

CREATE TABLE `bar` (
`foo_id` int,
`position` int,
KEY `foo_id` (`foo_id`),
KEY `foo_id_position` (`foo_id`,`position`)
) ENGINE='InnoDB';

SELECT
(SELECT position FROM bar AS b
WHERE b.foo_id = f.id
ORDER BY b.foo_id , b.position
LIMIT 1
) AS maxkey
FROM foo AS f
LIMIT 10;

This create
ERROR 2013 (HY000): Lost connection to MySQL server during query


On the error.log is backtrace and info about "hit the bug".
Tested on Debian 6 MySQL(5.1 and 5.5.19)

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