From 5ff70a80ef79ab0521fb83536189854e6ef68594 Mon Sep 17 00:00:00 2001
From: Yako <yako@YakotekiMacBook-Pro.local>
Date: Thu, 6 Nov 2014 17:23:33 +0800
Subject: [PATCH] sqlwall improve

---
 .../alibaba/druid/wall/spi/WallVisitorUtils.java | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java b/src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java
index 95b9d835db..7e8685443c 100644
--- a/src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java
+++ b/src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java
@@ -174,14 +174,21 @@ public class WallVisitorUtils {
                                 chrCount++;
                             }
                         }
+                    } else if (item instanceof SQLCharExpr) {
+                        if (((SQLCharExpr) item).getText().length() > 5) {
+                            chrCount = 0;
+                            continue;
+                        }
+                    }
+
+                    if (chrCount >= 4) {
+                        addViolation(visitor, ErrorCode.EVIL_CONCAT, "evil concat", x);
+                        break;
                     }
-                }
-                if (chrCount >= 4) {
-                    addViolation(visitor, ErrorCode.EVIL_CONCAT, "evil concat", x);
                 }
             }
         }
-
+        
         return true;
     }
 
@@ -1092,7 +1099,6 @@ public class WallVisitorUtils {
 
         return eval(visitor, dbType, x, Collections.emptyList());
     }
-    
 
     public static SQLExpr getFirst(SQLExpr x) {
         if (x instanceof SQLBinaryOpExpr) {