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EXPLAIN actual ascending nibble query to get MySQL's chosen index, and use that instead of the tool's chosen index. TODO: fix OobNibbleIterator.t and chunk_index.t.

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Daniel Nichter
2012-05-04 17:46:34 -06:00
parent 69b7a6b6a5
commit e2073065b1
5 changed files with 196 additions and 44 deletions
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20
t/pt-table-checksum/samples/not-using-pk-bug.out Normal file
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--
-- test.multi_resource_apt
--
REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*) AS cnt, COALESCE(LOWER(CONV(BIT_XOR(CAST(CRC32(CONCAT_WS('#', `apt_id`, `res_id`)) AS UNSIGNED)), 10, 16)), 0) AS crc FROM `test`.`multi_resource_apt` FORCE INDEX(`PRIMARY`) WHERE ((`apt_id` > ?) OR (`apt_id` = ? AND `res_id` >= ?)) AND ((`apt_id` < ?) OR (`apt_id` = ? AND `res_id` <= ?)) /*checksum chunk*/
REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*), '0' FROM `test`.`multi_resource_apt` FORCE INDEX(`PRIMARY`) WHERE ((`apt_id` < ?) OR (`apt_id` = ? AND `res_id` < ?)) ORDER BY `apt_id`, `res_id` /*past lower chunk*/
REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*), '0' FROM `test`.`multi_resource_apt` FORCE INDEX(`PRIMARY`) WHERE ((`apt_id` > ?) OR (`apt_id` = ? AND `res_id` > ?)) ORDER BY `apt_id`, `res_id` /*past upper chunk*/
SELECT /*!40001 SQL_NO_CACHE */ `apt_id`, `apt_id`, `res_id` FROM `test`.`multi_resource_apt` FORCE INDEX(`PRIMARY`) WHERE ((`apt_id` > ?) OR (`apt_id` = ? AND `res_id` >= ?)) ORDER BY `apt_id`, `res_id` LIMIT ?, 2 /*next chunk boundary*/
1 1,1,1 2,2,1
2 2,2,2 3,3,1
3 3,3,2 3,3,3
4 4,4,1 4,4,2
5 4,4,3 4,4,4
6 1,1,1
7 4,4,4