Pass --where to get_range_statistics().

t/pt-table-checksum/samples/where01.out

@@ -0,0 +1,3 @@
+DATABASE TABLE CHUNK
+test checksum_test 0
+test checksum_test 1

t/pt-table-checksum/samples/where01.sql

@@ -0,0 +1,26 @@
+drop database if exists test;
+create database test;
+use test;
+
+CREATE TABLE `checksum_test` (
+  `id` int(11) NOT NULL DEFAULT '0',
+  `date` date DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB;
+
+INSERT INTO `checksum_test` VALUES 
+      (1, '2011-03-01'), 
+      (2, '2011-03-01'), 
+      (3, '2011-03-01'), 
+      (4, '2011-03-01'), 
+      (5, '2011-03-01'), 
+      (6, '2011-03-02'), 
+      (7, '2011-03-02'), 
+      (8, '2011-03-02'), 
+      (9, '2011-03-02'), 
+      (10, '2011-03-02'), 
+      (11, '2011-03-03'), 
+      (12, '2011-03-03'), 
+      (13, '2011-03-03'), 
+      (14, '2011-03-03'), 
+      (15, '2011-03-03');