diff --git a/src/main/java/io/jboot/codegen/service/service_impl_template.tp b/src/main/java/io/jboot/codegen/service/service_impl_template.tp
index 901d98926b6b8cea262b3525234781661019ad0a..43193554f3f584e3d2de7b1729fd5129727bfcb7 100644
--- a/src/main/java/io/jboot/codegen/service/service_impl_template.tp
+++ b/src/main/java/io/jboot/codegen/service/service_impl_template.tp
@@ -3,10 +3,13 @@ package #(serviceImplPackageName);
 import io.jboot.aop.annotation.Bean;
 import #(basePackage).#(tableMeta.modelName)Service;
 import #(modelPackage).#(tableMeta.modelName);
+import io.jboot.db.model.Columns;
 import io.jboot.service.JbootServiceBase;
 
 
 @Bean
 public class #(tableMeta.modelName)Service#(firstCharToUpperCase(implName == null ? 'Impl' : implName)) extends JbootServiceBase<#(tableMeta.modelName)> implements #(tableMeta.modelName)Service {
-
-}
+    public boolean deleteByColumns(Columns columns) {
+        throw new UnsupportedOperationException();
+    }
+}
\ No newline at end of file