[FIP-6] Union read should be decouple with Paimon

[luoyuxia]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

Currently, the ability of Union read couples with Paimon, but the ability of Union read should be free to all lake formats.

Solution

No response

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!

[beryllw]

Interested in this, could you please assign it to me. Thanks.

[luoyuxia]

@beryllw Thanks for your attention. Definitely will assign to you. But it's non-trivial, we may need a design doc for it. We will need to extract the paimon releated implementation in Flink unoin read into interfaces. Also, we'll need to take #1140 as consideration together .
Maybe you can have a draft document about it, I'll be glad to help prepare the doc

[beryllw]

Also, we'll need to take #1140 as consideration together . Maybe you can have a draft document about it, I'll be glad to help prepare the doc

Thank you for your help. I will prepare a draft document that considers #1140 and wait for that issue to be ready before proceeding.

[luoyuxia]

@beryllw Big thank to you~

[luoyuxia]

See FIP https://cwiki.apache.org/confluence/display/FLUSS/FIP-6%3A+Decouple+Flink+union+read+with+paimon