Add index on role.level

eladmin-system/src/main/java/me/zhengjie/modules/system/domain/Role.java

@@ -18,7 +18,8 @@ import java.util.Set;
  * @date 2018-11-22
  */
 @Entity
-@Table(name = "role")
+@Table(name = "role",
+    indexes = {@Index(name = "role_level", columnList = "level")})
 @Getter
 @Setter
 public class Role implements Serializable {

sql/eladmin.sql

@@ -605,7 +605,8 @@ CREATE TABLE `role`  (
   `level` int(255) NULL DEFAULT NULL COMMENT '角色级别',
   `create_time` datetime NULL DEFAULT NULL COMMENT '创建日期',
   `permission` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '功能权限',
-  PRIMARY KEY (`id`) USING BTREE
+  PRIMARY KEY (`id`) USING BTREE,
+  KEY `role_level` (`level`)
 ) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '角色表' ROW_FORMAT = Compact;
 
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