HIVE-26401: Refine the log of add_partitions if the partition already exists

[wecharyu]

What changes were proposed in this pull request?

1. check if the table if a partitioned table before execute add_partitions.
2. only log the full table name and partition names if the partition already exists.

Why are the changes needed?

To improve the log preservation and readability.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Only refine the log, do not add any tests.

[ayushtkn]

Better not to mix two thing: refactor & log stuff together. Can you just restrict this PR to just Log refinement

[wecharyu]

Better not to mix two thing: refactor & log stuff together. Can you just restrict this PR to just Log refinement

Hi @ayushtkn , do you mean do not refactor validatePartition() method in this PR? I make this refactor to get partition keys from table, how about logging partition information in the format tableName[part_val1,part_val2...] without refactor?

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
Feel free to reach out on the dev@hive.apache.org list if the patch is in need of reviews.