使用更优化的sql histogram分布

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@901 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/test/java/com/alibaba/druid/TestHistogram.java

@@ -0,0 +1,13 @@
+package com.alibaba.druid;
+
+import junit.framework.TestCase;
+
+public class TestHistogram extends TestCase {
+    public void test_histogram() throws Exception {
+        int val = 4;
+        for (int i = 0; i < 10; ++i) {
+            val *= 4;
+            System.out.println(val);
+        }
+    }
+}