非聚集索引在执行计划中不可见

Question

I have implemented SQL Server's Change Data Capture feature in my database. When you enable CDC in your database , sql server will create some system tables for you like : cdc.dbo_Person_CT for tracking the changes you have in main Person table . I am using cdc.dbo_Person_CT table and i have applied Non-Clustered index on a column and i am using that column in select statement.

But when i see execution plan for my table ,it doesn't show Non-Clustered index ?? why

Answer 1

我们将不得不查看查询和索引详细信息，但我猜想查询将返回太多行，或者索引不够排斥，因此查询分析器决定改为使用扫描。