sql - 如何查找哪些外键引用表上的索引

Question

我有一个想要删除的非聚集索引(它是聚集索引的重复项)。但是，它正被外键约束使用。我希望能够识别哪个约束正在使用索引，以便我可以将其更新为使用主键索引。

当我尝试放下它时:

DROP INDEX [idx_duplicate] ON [dbo].[MyTable]

我收到错误:

An explicit DROP INDEX is not allowed on index 'dbo.MyTable.idx_duplicate'. It is being used for FOREIGN KEY constraint enforcement.

我试图通过以下查询找到罪魁祸首，但没有成功:

SELECT name
FROM sys.foreign_keys
WHERE OBJECT_NAME (referenced_object_id) = 'idx_duplicate'

Answer 1

类似的东西

Select
    f.name,
    object_name(f.parent_object_id)
From
    sys.foreign_keys f
        inner join
    sys.indexes i
        on f.referenced_object_id = i.object_id and
           f.key_index_id = i.index_id
Where
    i.name = 'idx_duplicate' and
    i.object_id = object_id('[dbo].[MyTable]')