jzhuge commented on issue #24741: [SPARK-27322][SQL] DataSourceV2: Select from multiple catalogs URL: https://github.com/apache/spark/pull/24741#issuecomment-498331700 @cloud-fan @dongjoon-hyun @HyukjinKwon This PR is ready for review. @rdblue and I have switched Relation Resolution from AstBuilder (as in the original commit) to `DataSourceResolution` in Analyzer. The core logic is much simpler and cleaner. We were able to overcome the obstacles I described in the first comment either with mostly minor fixes in this PR, or a separate PR #24763 for more thorough review.
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