!51 数据权限bugfix

Merge pull request !51 from sodkwhy/数据权限bugfix

yudao-framework/yudao-spring-boot-starter-biz-data-permission/src/main/java/cn/iocoder/yudao/framework/datapermission/core/db/DataPermissionDatabaseInterceptor.java

@@ -507,6 +507,9 @@ public class DataPermissionDatabaseInterceptor extends JsqlParserSupport impleme
             // 单条规则的条件
             String tableName = MyBatisUtils.getTableName(table);
             Expression oneExpress = rule.getExpression(tableName, table.getAlias());
+            if(oneExpress == null){
+                continue;
+            }
             // 拼接到 allExpression 中
             allExpression = allExpression == null ? oneExpress
                     : new AndExpression(allExpression, oneExpress);