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我有一个存储过程在给定碎片阈值@FragmentationThresholdForReorganizeTableLowerLimit 的情况下检索具有高碎片的索引：

SELECT OBJECT_NAME(IPS.OBJECT_ID) AS [TableName], 
       avg_fragmentation_in_percent, SI.name [IndexName],  
       schema_name(ST.schema_id) AS [SchemaName], fill_factor   
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL , NULL) IPS 
     JOIN sys.tables ST WITH (nolock) ON IPS.OBJECT_ID = ST.OBJECT_ID 
     JOIN sys.indexes SI WITH (nolock) ON IPS.OBJECT_ID = SI.OBJECT_ID AND 
     IPS.index_id = SI.index_id 
WHERE ST.is_ms_shipped = 0 
      AND SI.name IS NOT NULL 
      AND avg_fragmentation_in_percent >= CONVERT(DECIMAL, @FragmentationThresholdForReorganizeTableLowerLimit)  
ORDER BY avg_fragmentation_in_percent DESC

就我而言，@FragmentationThresholdForReorganizeTableLowerLimit 设置为 5.0。

然后我遍历所有检索到的索引，并根据 avg_fragmentation_in_percent 值使用以下命令执行 REORGANIZE 或 REBUILD：

ALTER INDEX [IndexName] ON [SchemaName].[Table] REORGANIZE
ALTER INDEX [IndexName] ON [SchemaName].[Table] REBUILD WITH (FILLFACTOR = 100, STATISTICS_NORECOMPUTE = OFF)

执行上述操作后，如果我执行以下查询以查找所有索引的平均碎片百分比，我可以看到 HEAP 类型的索引尚未重新组织/重建：

SELECT a.index_id, name, avg_fragmentation_in_percent, index_type_desc  
FROM sys.dm_db_index_physical_stats (DB_ID(), 
      NULL, NULL, NULL, NULL) AS a  
    JOIN sys.indexes AS b 
      ON a.object_id = b.object_id AND a.index_id = b.index_id
WHERE avg_fragmentation_in_percent > '5.0'
ORDER BY a.avg_fragmentation_in_percent desc;
GO

下面是显示查询输出的屏幕截图：

在此处输入图像描述

那么为什么堆索引没有被重新组织/重建呢？我如何重新组织或重建它们以消除它们的碎片？

更新：对不起我的错误，事实上我没有重建堆索引，因为我在 where 子句中使用“AND SI.name IS NOT NULL”条件时丢弃了它们......

所以在堆索引的情况下，因为它们的名字是 NULL，我怎样才能引用它们来重建它们呢？

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