Wenchen Fan created SPARK-36588:
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             Summary: Use v2 commands by default
                 Key: SPARK-36588
                 URL: https://issues.apache.org/jira/browse/SPARK-36588
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: Wenchen Fan


It's been a while after we introduce the v2 commands, and I think it's time to 
use v2 commands by default even for the session catalog, with a legacy config 
to fall back to the v1 commands.

We can do this one command by one command, with tests for both the v1 and v2 
versions. The tests should help us understand the behavior difference between 
v1 and v2 commands, so that we can:
 # fix the v2 commands to match the v1 behavior
 # or accept the behavior difference and write migration guide

We can reuse the test framework built inĀ 
https://issues.apache.org/jira/browse/SPARK-33381



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