评估插入会增长的页级空间

;WITH NonClustedIndexColumn AS
(
    SELECT dataid,column_id,c.object_id, MAX(c.dataneme) dataneme FROM 
    sys.index_columns  d
    INNER JOIN (SELECT index_id dataid,name dataneme ,* FROM sys.indexes WHERE index_id > 1
                UNION ALL 
                SELECT a.index_id dataid,a.name dataneme, b.* FROM sys.indexes a
                INNER JOIN sys.indexes b ON a.object_id = b.object_id AND b.index_id = 1 
     ) c ON c.object_id  = d.object_id  AND d.index_id = c.index_id
     GROUP BY dataid,column_id,c.object_id
),NonClustedIndexSize
AS(
SELECT --a.name,a.max_length,b.name,c.index_id
     OBJECT_NAME(a.object_id) name ,a.object_id,MAX(c.dataneme) index_name, c.dataid
    ,SUM(CASE WHEN b.name IN ('varchar','nvarchar') THEN 2+a.max_length ELSE 0 END) [Variable_Data]
    ,SUM(CASE WHEN b.name not IN ('varchar','nvarchar') THEN a.max_length ELSE 0 END) [Fixed_Data]
    ,CEILING(SUM(CASE WHEN a.is_nullable = 1 THEN 1 ELSE 0 END)*1.0 /8) [NullByte]        
    ,CASE WHEN c.dataid <=1 THEN 2 ELSE 1 END [RowHeader]
    ,CASE WHEN c.dataid <=1 THEN 2 ELSE 0 END [Fixed_Length]
    ,MAX( CASE WHEN b.name IN ('varchar','nvarchar')  THEN 2 ELSE 0 END) [Variable_Length]
    , 2 [Column_Count]
FROM sys.columns a
    INNER JOIN sys.types b ON a.user_type_id = b.user_type_id
    INNER JOIN NonClustedIndexColumn c ON a.object_id = c.object_id AND a.column_id = c.column_id
WHERE a.object_id >100 AND dataid > 1 -- AND OBJECT_NAME(a.object_id) = 'userorder_package'
 GROUP BY a.object_id,c.dataid
 )
, ClustedHeapSize AS(
SELECT --a.name,a.max_length,b.name,c.index_id
     OBJECT_NAME(a.object_id) name ,a.object_id,MAX(c.name) index_name, c.index_id
    ,SUM(CASE WHEN b.name IN ('varchar','nvarchar') THEN 2+a.max_length ELSE 0 END) [Variable_Data]
    ,SUM(CASE WHEN b.name not IN ('varchar','nvarchar') THEN a.max_length ELSE 0 END) [Fixed_Data]
    ,CEILING(SUM(CASE WHEN a.is_nullable = 1 THEN 1 ELSE 0 END)*1.0 /8) [NullByte]        
    ,CASE WHEN c.index_id <=1 THEN 2 ELSE 1 END [RowHeader]
    ,CASE WHEN c.index_id <=1 THEN 2 ELSE 0 END [Fixed_Length]
    ,MAX( CASE WHEN b.name IN ('varchar','nvarchar')  THEN 2 ELSE 0 END) [Variable_Length]
    , 2 [Column_Count]
FROM sys.columns a
    INNER JOIN sys.types b ON a.user_type_id = b.user_type_id
    INNER JOIN sys.indexes c ON c.object_id  = a.object_id  --AND d.index_id = c.index_id
WHERE a.object_id >100 AND c.index_id <= 1
 GROUP BY a.object_id,c.index_id )
,RowSize AS
(
    SELECT name = MAX(name),OBJECT_ID,rowsize=SUM([Variable_Data]+[Fixed_Data]+[NullByte]+[RowHeader]+[Fixed_Length]+[Variable_Length]+[Column_Count])
    FROM (
        SELECT * FROM NonClustedIndexSize
        UNION ALL
        SELECT * FROM ClustedHeapSize
    ) a
    GROUP BY OBJECT_ID
)

SELECT * FROM rowsize