T-SQL poor CTE join performance - sql

Question

Long story short. I have a two SQL queries that are very similar and outputs value pairs of short and long names. Input parameter is for first query: short name and for second query is long name. The queries are constructed that outputs all rows that contained input parameters and this is not exact match (for example if I set tagname as ST2 this query outputs all object that contains ST2 and all other object that has ST2 at the beginning of its name.
All the queries are executed in same database. In below queries input parameters are set to "" this means that query outputs key value pairs of short and long names for all objects
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
Whole query above runs at approx 3 seconds. And outputs about 450 rows
I created a similar one query on same database:
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
And this time query runs in 28 seconds. Outputs similar amount of row as first query (because ouptut must be similar on these two queries). I noticed that if i change "inner join" to for example "full join", query runs instantly.
Analog tag example output:
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
hierarchical name example output:
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
Output table (example):
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
Best regards and thanks in advance for any advices. I tried at my best to make this exapmple tables readable.