Checking if all tables can be checksummed ...
Starting checksum ...
--
-- issue_519.t
--

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('#', `i`, `y`, CRC32(`t`), CONCAT(ISNULL(`t`)))) AS UNSIGNED)), 10, 16)), 0) AS crc FROM `issue_519`.`t` FORCE INDEX(`myidx`) WHERE ((`i` > ?) OR (`i` = ? AND `y` >= ?)) AND ((`i` < ?) OR (`i` = ? AND `y` <= ?)) /*checksum chunk*/

REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*), '0' FROM `issue_519`.`t` FORCE INDEX(`myidx`) WHERE ((`i` < ?) OR (`i` = ? AND `y` < ?)) ORDER BY `i`, `y` /*past lower chunk*/

REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*), '0' FROM `issue_519`.`t` FORCE INDEX(`myidx`) WHERE ((`i` > ?) OR (`i` = ? AND `y` > ?)) ORDER BY `i`, `y` /*past upper chunk*/

SELECT /*!40001 SQL_NO_CACHE */ `i`, `i`, `y` FROM `issue_519`.`t` FORCE INDEX(`myidx`) WHERE ((`i` > ?) OR (`i` = ? AND `y` >= ?)) ORDER BY `i`, `y` LIMIT ?, 2 /*next chunk boundary*/

1 1,1,2000 3,3,2002
2 4,4,2003 6,6,2005
3 7,7,2006 9,9,2008
4 10,10,2009 11,11,2010
5  1,1,2000
6 11,11,2010