From 6413fc01cee750dba93e8787631192b0dc7e02a9 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Wed, 5 Jun 2013 12:37:32 +0800
Subject: [PATCH] bug for StatFilter merge sql

---
 .../druid/sql/visitor/ParameterizedOutputVisitorUtils.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/com/alibaba/druid/sql/visitor/ParameterizedOutputVisitorUtils.java b/src/main/java/com/alibaba/druid/sql/visitor/ParameterizedOutputVisitorUtils.java
index 4fcf9a609b..311e642d59 100644
--- a/src/main/java/com/alibaba/druid/sql/visitor/ParameterizedOutputVisitorUtils.java
+++ b/src/main/java/com/alibaba/druid/sql/visitor/ParameterizedOutputVisitorUtils.java
@@ -39,6 +39,10 @@ public class ParameterizedOutputVisitorUtils {
     public static String parameterize(String sql, String dbType) {
         SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
         List<SQLStatement> statementList = parser.parseStatementList();
+        if (statementList.size() == 0) {
+            return sql;
+        }
+        
         SQLStatement stmt = statementList.get(0);
 
         StringBuilder out = new StringBuilder();