[SPARK-26673][FollowUp][SQL]File Source V2: check existence of output path before delete it #23889
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
What changes were proposed in this pull request?
This is a followup PR to resolve comment: #23601 (review)
When Spark writes DataFrame with "overwrite" mode, it deletes the output path before actual writes. To safely handle the case that the output path doesn't exist, it is suggested to follow the V1 code by checking the existence.
How was this patch tested?
Apply #23836 and run unit tests