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mongo 查询 是否存在子节点

集合tab1 有字段 id pid name,
示例数据如下,需要查询name=张三 且没有 pid=id 的数据 不知道怎么写。
返回的结果应该是id 等于 1和3的行

SQL: select * from tab1 where name ='张三' and not exists (select 1 from tab1 t where t.pid=tab1.id)

id pid name
1 张三
2 张三
3 2 张三
4 李四

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与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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