将Heap RID转换成RID格式

Posted 2020-09-12 灰色世界

使用DBCC PAGE命令查看索引叶子层中的索引键（最后一个参数为3才会显示索引键对应的HEAP RID）时，可以使用下面的SQL将HEAP RID转换成 FileId:PageId:SlotNo的格式。这样可以根据索引键查找到RID所在页。

 
DECLARE @HeapRid BINARY(8)
SET @HeapRid = 0x6813000001000600SELECT 
     
       CONVERT (VARCHAR(5),
                    CONVERT(INT, SUBSTRING(@HeapRid, 6, 1)
                               + SUBSTRING(@HeapRid, 5, 1)))
     + ‘:‘
     + CONVERT(VARCHAR(10),
                    CONVERT(INT, SUBSTRING(@HeapRid, 4, 1)
                               + SUBSTRING(@HeapRid, 3, 1)
                               + SUBSTRING(@HeapRid, 2, 1)
                               + SUBSTRING(@HeapRid, 1, 1)))
     + ‘:‘
          + CONVERT(VARCHAR(5),
                    CONVERT(INT, SUBSTRING(@HeapRid, 8, 1)
                               + SUBSTRING(@HeapRid, 7, 1)))
                               AS ‘Fileid:Pageid:slot‘ 

 

 

 

 

Reference:

http://www.sqlservercentral.com/blogs/practicalsqldba/2013/03/17/sql-server-part-5-explaining-non-clustered-index-on-heap/