是否可以从 AWS Athena 中的嵌套 json object 创建平面表？

Question

I know, it's possible to create <struct> from nested JSON, and then query it with SELECT to access nested fields. But I want to create a flattened table, so every json field, even nested ones are in separated columns. Can't find proof that it's possible.

Answer 1

Glue Tables are representation of underlying data structure and I believe, the table structure has to represent exactly how it is stored.

However, we can easily create a view and use it

lets say table staff has a struct info as struct<name:string,staffid:string,email:string>

CREATE OR REPLACE VIEW staff_info AS
SELECT info.name as name, info.id as id
FROM staff;

SELECT * FROM staff_info limit 10