byongwu opened a new issue, #5831:
URL: https://github.com/apache/iceberg/issues/5831
### Feature Request / Improvement
Does Iceberg support Iceberg-based joined table of other Iceberg tables?
### Background
* We want to make transactional data lake with AWS Glue + Iceberg + AWS S3.
* Let's call that as L1 (layer 1 S3 bucket)
* L0 (layer 0) data is from AWS DMS (full load + CDC)
* It will be L0 -> Glue + Iceberg -> L1
* There will be more than hundreds of tables in L1.
### Question
* We want to make a L2 table which is a joined table from multiple L1 tables.
* We want the L2 table as transactional data lake as well.
* Is this possible?
* Is it possible to get CDC (difference) of Iceberg from time between timeA
and timeB?
* If so, we can build L2 Iceberg table from the CDC file set.
Any guidance or opinion is welcomed.
### Query engine
Spark
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