imback82 opened a new pull request #34137:
URL: https://github.com/apache/spark/pull/34137
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### What changes were proposed in this pull request?
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This PR proposes to use V2 commands as default as outlined in
[SPARK-36588](https://issues.apache.org/jira/browse/SPARK-36588), and this PR
migrates `SHOW TABLES` to use v2 command by default.
### Why are the changes needed?
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It's been a while since we introduced the v2 commands, and it seems
reasonable to use v2 commands by default even for the session catalog, with a
legacy config to fall back to the v1 commands.
### Does this PR introduce _any_ user-facing change?
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No, the user can use v1 command by setting `spark.sql.legacy.useV1Command`
to `true`.
### How was this patch tested?
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Added unit tests.
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