Old SQL Query Optimization - sql-server

Question

I have a pre written SQL Query, which takes 45 minutes to actually run and show the data. It returns total 80000+ records. But it takes hell lot of time to run and show the data.
SELECT
hq.QuoteHeaderId,
hq.HandsetQuoteId,
hq.QuoteDate,
t_PhoneAudit.PhoneModelId,
t_PhoneAudit.IMEI,
t_PhoneModel.ModelName,
t_PhoneBrand.Name As BrandName
, al.ActivityId
, par.Result
, al.CustomMessage,
al.[Description]
,thqai.Value AS AgentName
FROM [t_DynaGroupMissingRecordsProcessing]
INNER JOIN t_HandsetQuote hq ON t_DynaGroupMissingRecordsProcessing.HandsetQuoteId = hq.HandsetQuoteId
INNER JOIN t_PhoneAudit ON t_PhoneAudit.PhoneAuditId = hq.QuotePhoneAuditId
INNER JOIN t_PhoneModel ON t_PhoneModel.PhoneModelId = t_PhoneAudit.PhoneModelId
INNER JOIN t_PhoneBrand ON t_PhoneBrand.PhoneBrandId = t_PhoneModel.PhoneBrandId
INNER JOIN
(
SELECT par.HandsetQuoteId, txt_Value AS ActivityId, 'OK' AS Result FROM t_PhoneAuditRetail par CROSS APPLY dbo.fn_ParseText2Table(par.Ok, ',')
UNION
SELECT par.HandsetQuoteId, txt_Value AS ActivityId, 'Fault' AS Result FROM t_PhoneAuditRetail par CROSS APPLY dbo.fn_ParseText2Table(par.Fault, ',')
) par ON hq.HandsetQuoteId = par.HandsetQuoteId
INNER JOIN t_ActivityLocalization al ON par.ActivityId = al.ActivityId
INNER JOIN t_ContactChannel CC ON al.ContactChannelId = CC.ContactChannelId
INNER JOIN t_testingProfiledetails ON t_testingProfiledetails.ActivityId = al.ActivityId AND ( IsVisibleForRetail = '1' OR t_testingProfiledetails.ActivityId IN ('93','97')) AND t_testingProfiledetails.ProfileId IN (SELECT DefailtRetailProfileId FROM t_ContactChannel WHERE Name IN ('Holland Retail', 'BelCompanyNPEY Retail', 'Belcompany Retail', 'HollandNPEY Retail'))
LEFT OUTER JOIN t_HandsetQuoteAdditionalInfo thqai on thqai.HandsetQuoteId = hq.HandsetQuoteId and thqai.KeyName = 'AgentName'
WHERE [t_DynaGroupMissingRecordsProcessing].IsProcessed = 0
AND CC.Name IN ('Holland Retail', 'BelCompanyNPEY Retail', 'Belcompany Retail', 'HollandNPEY Retail')
ORDER BY hq.HandsetQuoteId
The main problem is with CC.Name IN ('Holland Retail', 'BelCompanyNPEY Retail', 'Belcompany Retail', 'HollandNPEY Retail') this statement.
If i keep on adding the name in the In Statement, the query becomes more and more slow.
Below is the defintion for the function i am using:
ALTER FUNCTION [dbo].[fn_ParseText2Table]
(
#p_SourceText VARCHAR(8000)
,#p_Delimeter VARCHAR(100) = ',' --default to comma delimited.
)
RETURNS #retTable TABLE
(
txt_value VARCHAR(2000)
)
AS
BEGIN
DECLARE #w_Continue int
,#w_StartPos int
,#w_Length int
,#w_Delimeter_pos int
,#w_tmp_txt VARCHAR(2000)
,#w_Delimeter_Len tinyint
SET #w_Continue = 1
SET #w_StartPos = 1
SET #p_SourceText = RTRIM( LTRIM( #p_SourceText))
SET #w_Length = DATALENGTH( RTRIM( LTRIM( #p_SourceText)))
SET #w_Delimeter_Len = len(#p_Delimeter)
WHILE #w_Continue = 1
BEGIN
SET #w_Delimeter_pos = CHARINDEX(#p_Delimeter,(SUBSTRING( #p_SourceText, #w_StartPos,((#w_Length - #w_StartPos)+#w_Delimeter_Len))))
IF #w_Delimeter_pos > 0 -- delimeter(s) found, get the value
BEGIN
SET #w_tmp_txt = LTRIM(RTRIM( SUBSTRING( #p_SourceText, #w_StartPos
,(#w_Delimeter_pos - 1)) ))
SET #w_StartPos = #w_Delimeter_pos + #w_StartPos + (#w_Delimeter_Len- 1)
END
ELSE -- No more delimeters, get last value
BEGIN
SET #w_tmp_txt = LTRIM(RTRIM( SUBSTRING( #p_SourceText, #w_StartPos
,((#w_Length - #w_StartPos) + #w_Delimeter_Len)) ))
SELECT #w_Continue = 0
END
INSERT INTO #retTable VALUES( #w_tmp_txt )
END
RETURN
END
Please help me to optimize this query.

Answer 1

you can try this
Insert the list of names to #table(name) and join it to cc
on cc.name=#table.name