Redshift / S3-将Redshift表的内容作为JSON复制到S3吗？

Question

It's straightforward to copy JSON data on S3 into a Redshift table using the standard Redshift COPY command.

However, I'm also looking for the inverse operation: to copy the data contained within an existing Redshift table to JSON that is stored in S3, so that a subsequent Redshift COPY command can recreate the Redshift table exactly as it was originally.

I know about the Redshift UNLOAD commnd, but it doesn't seem to offer any option to store the data in S3 directly in JSON format.

I know that I can write per-table utilities to parse and reformat the output of UNLOAD for each table, but I'm looking for a generic solution which allows me to do this Redshift-to-S3-JSON extract on any specified Redshift table.

I couldn't find any existing utilities that will do this. Did I miss something?

Thank you in advance.

Answer 1

我认为唯一的方法是卸载CSV并编写一个简单的lambda函数，以CSV标头作为键并将每行的值作为值，将输入CSV转换为JSON。

Answer 2

There is no built in way to do this yet. So you might have to hack your query with some hardcoding :

https://sikandar89dubey.wordpress.com/2015/12/23/how-to-dump-data-from-redshift-to-json/