嵌套类型不能正确设值

[0xleizhang]

select  
		a.context,a.create_time,
		b.avatar as "creator.avatar",b.avatar as creator_avatar
		from t_comment a 
		left join t_user b on a.create_by = b.id
		where a.link_id in (?)

为了方便复现以下是
建表SQL：
CREATE TABLE IF NOT EXISTS "t_comment" ( "id" SERIAL PRIMARY KEY NOT NULL, "link_id" INTEGER NULL, "context" VARCHAR(240) NULL, "score" INTEGER DEFAULT 0 NULL, "agree" INTEGER DEFAULT 0 NULL, "disagree" INTEGER DEFAULT 0 NULL, "create_by" INTEGER NULL, "create_time" TIMESTAMP NULL, "update_time" TIMESTAMP NULL, "delete_time" TIMESTAMP NULL )CREATE TABLE IF NOT EXISTS "t_user" ( "id" SERIAL NOT NULL primary key, "name" VARCHAR(140) NULL, "avatar" varchar(380) null, "score" int NULL, "create_time" timestamp NULL, "update_time" timestamp NULL, "delete_time" timestamp NULL );

[0xleizhang]

同样的struct结构SQL改成这样就能设值：

select  
		a.context,a.create_time,
		b.avatar 
		from t_comment a 
		left join t_user b on a.create_by = b.id
		where a.link_id in (?)

[0xleizhang]

嵌套类型用extends 能够正常的查询设置。但是插入的时候会出错