diff --git a/core/src/main/java/com/github/drinkjava2/jdialects/Dialect.java b/core/src/main/java/com/github/drinkjava2/jdialects/Dialect.java
index dd3737e4b241d1befab14c7b199cd3f887e8745c..7cbee86c8143d8738fe9a42341471bf8a2a5e1bc 100644
--- a/core/src/main/java/com/github/drinkjava2/jdialects/Dialect.java
+++ b/core/src/main/java/com/github/drinkjava2/jdialects/Dialect.java
@@ -657,6 +657,8 @@ public class Dialect {
     /** Note! this is a global method to set globalNamingConversion */
     public static void setGlobalNamingConversion(NamingConversion globalNamingConversion) {
         Dialect.globalNamingConversion = globalNamingConversion;
-    } 
+    }
+
+    protected String renderExt(String functionName,String template,String... args){return null;}
 
 }
diff --git a/core/src/main/java/com/github/drinkjava2/jdialects/DialectFunctionUtils.java b/core/src/main/java/com/github/drinkjava2/jdialects/DialectFunctionUtils.java
index fdbede82b6c1621d65370550ff40e458307a004c..d9580eb8b14e4ada7675e5d7ca1b92ffee004b50 100644
--- a/core/src/main/java/com/github/drinkjava2/jdialects/DialectFunctionUtils.java
+++ b/core/src/main/java/com/github/drinkjava2/jdialects/DialectFunctionUtils.java
@@ -85,7 +85,12 @@ public class DialectFunctionUtils {// NOSONAR
 					return StrUtils.replace(template, "$NVL_Params", s);
 				}
 			}
-			return (String) DialectException.throwEX("jDialect found a template bug error, please submit this bug");
+			String result = d.renderExt(functionName,template,args);
+			if(result != null){
+				return result;
+			}else{
+				return (String) DialectException.throwEX("jDialect found a template bug error, please submit this bug");
+			}
 		} else {
 			int argsCount = 0;
 			if (args != null)