SQL Server - 如何识别表是堆还是B树

Question

SQL Server - 是否有一个系统表用于识别我的表是堆还是b-tree？

Answer 1

是的,目录视图sys.partitions包含此信息.该字段index_id将告诉您表是堆(index_id = 0)还是b-tree(index_id> 0).

select 
    o.name, 
    o.object_id, 
    case 
      when p.index_id = 0 then 'Heap'
      when p.index_id = 1 then 'Clustered Index/b-tree'
      when p.index_id > 1 then 'Non-clustered Index/b-tree'
    end as 'Type'
from sys.objects o
inner join sys.partitions p on p.object_id = o.object_id
where name = 'YourTableName'

从文档 - 表和索引组织:

此分区所属的对象中的索引的ID.

0 = heap
1 = clustered index
2 or greater = nonclustered

堆是没有聚簇索引的表.非聚簇索引具有类似于聚簇索引中的B树索引结构.