問題文
A financial services team enables deletion vectors on a large trade table that receives frequent single-row corrections. What benefit should they expect, and what must they be aware of?
選択肢
- Corrections become slower because every read must apply the deletion vector entries, so deletion vectors should only be used on small tables.
- Corrections become faster and the old values are removed from storage immediately, because deletion vectors trigger an automatic rewrite.
- Corrections become faster because rows are marked in metadata instead of rewriting whole Parquet files, but the old values remain physically present until the files are rewritten.
- Nothing changes unless Photon is also enabled, because deletion vectors only work with Photon.