这是计划：https : //www.brentozar.com/pastetheplan/?id=rkM8d7ONS
我最感兴趣的是如何摆脱懒惰的线轴？
这是查询：
SELECT DISTINCT
SM.Security_ID 'Security_ID',
Leg.Leg_Type 'Leg_Type',
Leg.Leg_Side 'Leg_Side',
Ct.Security_Type AS 'Swap_Type',
Leg.CDX_Indicator AS 'CDS_CDX_Flag',
SM.Currency AS 'Notional_Currency',
Ct.Cross_Currency_Flag AS 'Cross_Currency_Flag',
Ct.Custom_Overrides AS 'Special_Instructions',
Leg.Protection_Indicator AS 'Buy_Sell_Protection',
Leg.Commission_Direction AS 'Commission_Direction',
Leg.Dividend_Payment_Indicator AS 'Undl_Asset_Dividend_Flag',
SM.Issue_Date AS 'Effective_Date',
SM.Maturity_Date AS 'Maturity_Date',
Leg.Settlement_Frequency 'Settlement_Frequency',
Leg.Reset_Frequency 'Reset_Frequency',
Leg.Roll_Day AS 'Roll_Day',
Leg.Reset_Business_Day_Convention AS 'Reset_Business_Day_Convn',
Leg.Settlement_Business_Day_Convention AS 'Settlement_Business_Day_Convn',
Leg.First_Payment_Date AS 'First_Period_End_Date',
Leg.Day_Count AS 'Day_Count_Basis',
Leg.Interest_Rate AS 'Interest_Rate',
Leg.Spread AS 'Spread',
Leg.CDX_Attachment AS 'CDX_Attachment',
Leg.CDX_Detachment AS 'CDX_Detachment',
Leg.Factor AS 'Factor',
Leg.Commission AS …