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Detect infinite loops. Use best non-unique index. Disable chunk size limit if chunk index is unique.

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This commit is contained in:
Daniel Nichter
2011-09-23 17:33:23 -06:00
parent 07cb6010a2
commit 9f3e05691c
4 changed files with 220 additions and 30 deletions
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21
t/lib/samples/NibbleIterator/bad_tables.sql Normal file
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DROP DATABASE IF EXISTS bad_tables;
CREATE DATABASE bad_tables;
USE bad_tables;
-- This table can cause an infinite nibbling loop.
CREATE TABLE `inv` (
`tee_id` int(11) NOT NULL,
`on_id` int(11) NOT NULL,
`updated_at` datetime DEFAULT NULL,
KEY `index_inv_on_on_id` (`on_id`),
KEY `index_inv_on_tee_id_and_on_id` (`tee_id`,`on_id`)
);
INSERT INTO inv (tee_id, on_id) VALUES
(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 7), (1, 8), (1, 9),
(2, 1), (2, 2), (2, 3), (2, 5), (2, 6), (2, 7), (2, 8),
(3, 1), (3, 2), (3, 3), (3, 4),
(4, 3), (4, 4), (4, 5), (4, 6), (4, 7), (4, 8), (4, 9),
(5,1),
(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6), (6, 7), (6, 8), (6, 9),
(7, 1), (7, 2), (7, 3), (7, 4), (7, 5), (7, 6), (7, 7), (7, 8), (7, 9);