cloud-fan commented on issue #24798: [SPARK-27724][SQL] Implement REPLACE TABLE 
and REPLACE TABLE AS SELECT with V2
URL: https://github.com/apache/spark/pull/24798#issuecomment-511271344
 
 
   I was not saying that REPLACE TABLE isn't important, I just want to 
emphasize that, it's better to have smaller Spark PRs when possible. Many 
people try to enforce it when reviewing PRs, and I don't want to break the rule 
here. It not only easy the review, but also make the commit history clearer.
   
   This PR does 2 things:
   1.  introduce `StagingTableCatalog` API
   2. implement REPLACE TABLE (depends on 1)
   
   We can create a new PR for `StagingTableCatalog`, and keep this PR for 
review/discussion. After the new PR is merged, rebase this PR. This is also 
what I do for individual stuff in big PRs: 
https://github.com/apache/spark/pull/25107

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