Test, ensure pt-table-checksum can handle col names with dots.

t/pt-table-checksum/samples/dot.out

@@ -0,0 +1,19 @@
+--
+-- test.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('#', `no.`, `foo.bar`, CONCAT(ISNULL(`foo.bar`)))) AS UNSIGNED)), 10, 16)), 0) AS crc FROM `test`.`t` FORCE INDEX(`PRIMARY`) WHERE ((`no.` >= ?)) AND ((`no.` <= ?)) /*checksum chunk*/
+
+REPLACE INTO `percona`.`checksums` (db, tbl, chunk, chunk_index, lower_boundary, upper_boundary, this_cnt, this_crc) SELECT ?, ?, ?, ?, ?, ?, COUNT(*), '0' FROM `test`.`t` FORCE INDEX(`PRIMARY`) WHERE ((`no.` < ?)) ORDER BY `no.` /*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`.`t` FORCE INDEX(`PRIMARY`) WHERE ((`no.` > ?)) ORDER BY `no.` /*past upper chunk*/
+
+SELECT /*!40001 SQL_NO_CACHE */ `no.` FROM `test`.`t` FORCE INDEX(`PRIMARY`) WHERE ((`no.` >= ?)) ORDER BY `no.` LIMIT ?, 2 /*next chunk boundary*/
+
+1 eight four
+2 nine seven
+3 six three
+4 two two
+5  eight
+6 two 
+

t/pt-table-checksum/samples/dot.sql

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+drop database if exists test;
+create database test;
+use test;
+
+CREATE TABLE t (
+  `No.` varchar(16) NOT NULL DEFAULT '',
+  `foo.bar` varchar(16),
+  PRIMARY KEY (`No.`)
+) ENGINE=MyISAM;
+
+insert into t values
+  ('one', 'a'),
+  ('two', 'a'),
+  ('three', 'a'),
+  ('four', 'a'),
+  ('five', 'a'),
+  ('six', 'a'),
+  ('seven', 'a'),
+  ('eight', 'a'),
+  ('nine', 'a'),
+  ('ten', 'a');