fix #308

RELEASE-NOTES.md

+## 1.5.1
+
+### 缺陷修正
+
+1. [ISSUE #308](https://github.com/dangdangdotcom/sharding-jdbc/issues/308) 数据库原生的自增GeneratedKey的返回无效
+
 ## 1.5.0
 
 ### 里程碑

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/jdbc/core/statement/ShardingStatement.java

@@ -226,6 +226,9 @@ public class ShardingStatement extends AbstractStatementAdapter {
         if (generatedKey.isPresent() && returnGeneratedKeys) {
             return new GeneratedKeysResultSet(routeResult.getGeneratedKeys().iterator(), generatedKey.get().getColumn(), this);
         }
+        if (1 == getRoutedStatements().size()) {
+            return getRoutedStatements().iterator().next().getGeneratedKeys();
+        }
         return new GeneratedKeysResultSet();
     }