improve odps sql support

src/test/java/com/alibaba/druid/bvt/sql/odps/OdpsFormatCommentTest27.java

@@ -0,0 +1,15 @@
+package com.alibaba.druid.bvt.sql.odps;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.SQLUtils;
+
+import junit.framework.TestCase;
+
+public class OdpsFormatCommentTest27 extends TestCase {
+    public void test_drop_function() throws Exception {
+        String sql = "select split(val, ',')[1] from dual";
+        Assert.assertEquals("SELECT SPLIT(val, ',')[1]"
+                + "\nFROM dual", SQLUtils.formatOdps(sql));
+    }   
+}