单选题Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（）A No literal value is su
题目
单选题
Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（）
A
No literal value is substituted for a shared cursor.
B
Different execution plans are generated for substituted literal values.
C
The substitution of a literal value will produce different execution plans.
D
The substitution of any literal value will produce exactly the same execution plan.