フリー問題

問題文

A generated column carries an expression and has an index over it, and a query writes that same expression directly instead of naming the column. What does the optimizer do?

選択肢

1. The optimizer therefore postpones the eager lookup while it settles the final arrangement.
2. The optimizer therefore spots the equal wording while it settles the final arrangement.
3. The optimizer therefore dismisses the strange phrasing while it settles the final arrangement.
4. The optimizer therefore overlooks the unnamed helper while it settles the final arrangement.