长话短说。我有两个非常相似的SQL查询，并输出短名称和长名称的值对。输入参数用于第一个查询：短名称，第二个查询是长名称。查询被构造为输出包含输入参数的所有行，但并不完全匹配（例如，如果我将标记名设置为ST2，则此查询将输出所有包含ST2的对象以及所有其他名称开头为ST2的对象。 / p>
所有查询都在同一数据库中执行。在下面的查询中，输入参数设置为""，这意味着查询输出所有对象的短名称和长名称的键值对
declare @tagName as varchar(50) = ''
set @tagName = @tagName + '.'
-- this one query outputs ~700 rows
;with AnalogTag as
(
Select *
from [Runtime].[dbo].[AnalogTag]
where (substring(TagName, 0, charindex('.',@tagName))) in (substring(@tagName,0, len(@tagName)))
and (substring(TagName, charindex('.',TagName), 2)) not in ('.#')
),
-- this one query outputs ~7000 rows
HierarchicalName as
(
Select *
from [proba7].[dbo].[internal_list_objects_view]
where substring(tag_name, 0,len(@tagName)) = substring(@tagName,0, len(@tagName))
)
select HierarchicalName.tag_name as TagName
,HierarchicalName.hierarchical_name ilo_view_HierarchicalName
from AnalogTag
inner join HierarchicalName
on substring(AnalogTag.TagName, 0, CHARINDEX('.',AnalogTag.TagName)) = HierarchicalName.tag_name
上面的整个查询运行大约3秒钟。并输出约450行
我在同一数据库上创建了一个类似的查询：
declare @hierarchicalName as varchar(200) = ''
declare @Length as int
set @Length = LEN(@hierarchicalName)+1
-- this query outputs approx 700 rows and if runs separately it runs
--almost instantly
;with AnalogTag as
(
Select TagName
from [Runtime].[dbo].[AnalogTag]
where (substring(TagName, 0, CHARINDEX('.',TagName))) in
(
Select tag_name from [proba7].[dbo].[internal_list_objects_view]
where substring(hierarchical_name, 0, @Length) = @hierarchicalName
)
and (substring(TagName, CHARINDEX('.',TagName), 2)) not in ('.#')
),
-- this query outputs approx 7000 rows and if runs separately it runs
--almost instantly
HierarchicalName as
(
Select hierarchical_name, tag_name from [proba7].[dbo].[internal_list_objects_view]
where substring(hierarchical_name, 0, @Length) = @hierarchicalName
)
select HierarchicalName.tag_name as ilo_view_TagName
,HierarchicalName.hierarchical_name ilo_view_HierarchicalName
from AnalogTag
inner join HierarchicalName
on substring(AnalogTag.TagName, 0, CHARINDEX('.',AnalogTag.TagName)) = HierarchicalName.tag_name
这次查询将在28秒内运行。输出与第一个查询相似的行数（因为这两个查询的ouptut必须相似）。我注意到，如果我将“内部联接”更改为“完全联接”，查询将立即运行。
模拟标记示例输出：
TagName a b c d e f g h j j k l m
PomFPTemp.PV 1062 0 10 0 10 0 4 0 0 0 0 0 0
PomFPWilgWzgl.PV 1 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocD3f.PV 1063 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocP3f.PV 46 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocQ3f.PV 1063 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocQ3fIntExp.PV 1063 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocQ3fIntImp.PV 1063 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1BrakFWHMocQn3f.PV 1063 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1EnkvarhExp3f.PV 1060 0 10 0 10 0 4 0 0 0 0 0 0
SNST3P1EnkvarhImp3f.PV 1060 0 10 0 10 0 4 0 0 0 0 0 0
分层名称示例输出：
ID tag_name contained_name hierarchical_name a b c d e f g h i j k l m n o p q r s t u v w x y z aa bb cc dd ee ff gg hh
1 $Galaxy $Galaxy 1 0 0 0 0 1 NULL NULL 0 0 1 1 1 0 0 0 0 0 1 0 NULL 23 0 0 0 0 0 0 0 0 0 133123 50026 1 NULL
2 proba7 Galaxy_001 0 0 0 0 1 1 NULL NULL 0 0 848 1 0 1 0 0 0 0 1 0 NULL 23 0 0 0 0 0 0 0 0 0 4098 878020 1 NULL
3 $_AutoImport $_AutoImport 1 0 0 0 0 3 NULL NULL 0 0 4 2 0 0 0 0 0 0 1 0 NULL 10 0 0 0 0 0 0 0 0 0 131075 3699 1 NULL
4 $_DiCommon $_DiCommon 1 0 0 0 0 4 NULL NULL 0 0 5 3 0 0 0 0 0 0 1 0 NULL 10 0 0 0 0 0 0 0 0 0 131075 50023 1 NULL
5 $WinPlatform $WinPlatform 1 0 0 0 0 5 NULL 1 0 0 6 4 1 0 0 0 0 0 0 0 NULL 1 0 0 0 0 0 0 0 0 0 133121 419340 1 1
6 $AppEngine $AppEngine 1 0 0 0 0 6 NULL 1 0 0 7 5 1 0 0 0 0 0 0 0 NULL 3 0 0 0 0 0 0 0 0 0 133121 419341 1 1
7 $Area $Area 1 0 0 0 0 7 NULL 1 0 0 8 6 1 0 0 0 0 0 0 0 NULL 13 0 0 0 0 0 0 0 0 0 133121 3452998 1 1
8 $AnalogDevice $AnalogDevice 1 0 0 0 0 8 NULL 2 0 0 9 7 0 0 0 0 0 0 0 0 NULL 10 0 0 0 0 0 0 0 0 0 131073 419343 1 2
9 $DDESuiteLinkClient $DDESuiteLinkClient 1 0 0 0 0 9 NULL 3 0 0 10 8 1 0 0 0 0 0 0 0 NULL 11 0 0 0 0 0 0 0 0 0 133121 419344 1 3
10 $DiscreteDevice $DiscreteDevice 1 0 0 0 0 10 NULL 2 0 0 11 9 0 0 0 0 0 0 0 0 NULL 10 0 0 0 0 0 0 0 0 0 131073 419345 1 2
11 $InTouchProxy $InTouchProxy 1 0 0 0 0 11 NULL 3 0 0 12 10 0 0 0 0 0 0 0 0 NULL 11 0 0 0 0 0 0 0 0 0 131073 419346 1 3
输出表（示例）：
ilo_view_TagName ilo_view_HierarchicalName
ST4FP12Rozl ST4_FP1.Galaz_2.Rozladowywanie
ST4FP21Rozl ST4_FP2.Galaz_1.Rozladowywanie
ST4FP22Rozl ST4_FP2.Galaz_2.Rozladowywanie
ST4FP31Rozl ST4_FP3.Galaz_1.Rozladowywanie
ST4RS41AnWspKFL2 ST4_S1_RS4_1.Wsp.K_Factor.L2
ST4FP32Rozl ST4_FP3.Galaz_2.Rozladowywanie
ST4RS31AnWspKFL2 ST4_S2_RS3_1.Wsp.K_Factor.L2
ST4RS51AnWspKFL2 ST4_S3_RS5_1.Wsp.K_Factor.L2
ST4FP11U ST4_FP1.Galaz_1.Napiecie
最诚挚的问候，并感谢您的任何建议。我尽力使该示例表可读。