数据库：sqlserver 2008。下面的查询非常慢。我想让这个野兽跑得更快，重写查询，但我很难过。我可以注释掉所有 sum case 语句和 group by 子句，只留下带有 select sum(0) 和 where 子句的查询外壳，并且性能没有太大变化。所以我很确定问题出在 where 子句上。但是，我不确定如何重写这个来尝试任何其他替代方案。
有人想在这个上测试他们的 SQL-fu 吗？任何帮助深表感谢。谢谢！
INSERT INTO [_SOC_Reviews]
DECLARE
@LocationID Int=NULL,
@FromDate DateTime=NULL,
@ToDate DateTime=NULL,
@DateType Int=0,
@OfficeID Int=NULL,
@QCType Int=NULL,
@ProgramTypeID Int=NULL,
@SupervisorID varchar(100)=NULL,
@SpecialistID varchar(100)=NULL,
@ReviewerID varchar(100)=NULL,
@PrincipalActionID Int=NULL,
@DepartmentID Int=NULL,
@Group1 Int=1,
@Group2 Int=1,
@ReportName VarChar(100)='rptQC',
@UserName varchar(30)=NULL
select
@LocationID=NULL,
@FromDate='2012-05-01 00:00:00',
@ToDate='2012-06-01',
@OfficeID=NULL,
@ProgramTypeID=NULL,
@SupervisorID=NULL,
@SpecialistID=NULL,
@PrincipalActionID=NULL,
@QCType=NULL,
@Group1=1,
@Group2=NULL,
@UserName=N'joeblow',
@DepartmentID=NULL,
@ReviewerID=NULL
IF OBJECT_ID('dbo.[_SOC_Reviews]', 'U') IS NOT NULL
DROP TABLE dbo.[_SOC_Reviews]
CREATE TABLE [_SOC_Reviews] (
IsReviewed int,
Group1 Varchar(100),
Group2 Varchar(100),
NumFilesAssigned int,
NumFilesInProgress int,
TotalNumFiles int,
PendingCorrections int,
PendingCorrGT30 int
)
select SUM(0),
CASE
WHEN @Group1 = 1 THEN CONVERT(Varchar(100), R.LocationID)
WHEN @Group1 = 2 THEN CONVERT(Varchar(100), R.SubLocation)
WHEN @Group1 = 3 THEN CONVERT(Varchar(100), R.ProgramTypeID)
WHEN @Group1 = 4 THEN CONVERT(Varchar(100), RS.SupervisorID)
WHEN @Group1 = 5 THEN CONVERT(Varchar(100), R.TransactionTypeId)
WHEN @Group1 = 6 THEN CONVERT(Varchar(100), RS.SpecialistID)
WHEN @Group1 = 7 THEN CONVERT(Varchar(100), R.ChecklistTypeId)
WHEN @Group1 = 8 THEN CONVERT(Varchar(100), RS.DepartmentID)
WHEN @Group1 = 9 THEN CONVERT(Varchar(2), DATEPART(MONTH,R.EffectiveActionDate)) + '/' + CONVERT(VARCHAR(4),DATEPART(YEAR,R.EffectiveActionDate))
WHEN @Group1 = 10 THEN CONVERT(Varchar(100), R.ReviewedBy)
END,
CASE
WHEN @Group2 = 1 THEN CONVERT(Varchar(100), R.SubLocation)
WHEN @Group2 = 2 THEN CONVERT(Varchar(100), R.ProgramTypeID)
WHEN @Group2 = 3 THEN CONVERT(Varchar(100), RS.SupervisorID)
WHEN @Group2 = 4 THEN CONVERT(Varchar(100), RS.SpecialistID)
WHEN @Group2 = 5 THEN CONVERT(Varchar(100), R.TransactionTypeId)
WHEN @Group2 = 6 THEN CONVERT(Varchar(100), R.LocationID)
WHEN @Group2 = 7 THEN CONVERT(Varchar(100), R.ChecklistTypeId)
WHEN @Group2 = 8 THEN CONVERT(Varchar(100), RS.DepartmentID)
WHEN @Group2 = 9 THEN CONVERT(Varchar(2), DATEPART(MONTH,R.EffectiveActionDate)) + '/' + CONVERT(VARCHAR(4),DATEPART(YEAR,R.EffectiveActionDate))
WHEN @Group2 = 10 THEN CONVERT(Varchar(100), R.ReviewedBy)
ELSE NULL
END,
SUM(CASE WHEN R.ReviewStatusId = 7 AND (R.ReviewStatusModified BETWEEN @FromDate AND @ToDate) THEN 1 ELSE 0 END) AS NumberOfFilesAssigned,
SUM(CASE WHEN R.ReviewStatusId = 1 AND (R.ReviewStatusModified BETWEEN @FromDate AND @ToDate) THEN 1 ELSE 0 END) as NumberOfFilesInProgress,
SUM(CASE WHEN (R.ReviewStatusModified BETWEEN @FromDate AND @ToDate) THEN 1 ELSE 0 END) AS TotalNumFiles,
SUM(CASE WHEN R.ReviewStatusId IN (10,12,14,16) THEN 1 ELSE 0 END),
SUM(CASE WHEN R.ReviewStatusId IN (10,12,14,16) AND DATEDIFF(DAY, R.InitialCompletionDate, GETDATE()) > 30 THEN 1 ELSE 0 END)
from Review R
LEFT JOIN dbo.fnu_ReviewSpecialists2_TEST(@SpecialistID,@SupervisorID,@DepartmentID) RS
ON R.Id = RS.ReviewId
LEFT JOIN Location L
ON R.LocationId = L.Id
INNER JOIN [_SOC_USER] U
ON R.LocationID = U.LocationID
where
((R.LocationID = @LocationID AND @LocationID IS NOT NULL) OR (@LocationID IS NULL))
AND ((R.SubLocation = @OfficeID AND @OfficeID IS NOT NULL) or (@OfficeID IS NULL))
AND ((R.ProgramTypeID = @ProgramTypeID AND @ProgramTypeID IS NOT NULL) or (@ProgramTypeID IS NULL))
AND ((R.TransactionTypeId = @PrincipalActionID AND @PrincipalActionID IS NOT NULL) or (@PrincipalActionID IS NULL))
AND ((R.ChecklistTypeId = @QCType AND @QCType IS NOT NULL) OR (@QCType IS NULL))
AND ((R.ReviewedBy = @ReviewerID AND @ReviewerID IS NOT NULL) or (@ReviewerID IS NULL))
AND ((RS.SupervisorId = @SupervisorID AND @SupervisorID IS NOT NULL) or (@SupervisorID IS NULL))
AND ((RS.SpecialistId = @SpecialistID AND @SpecialistID IS NOT NULL) or (@SpecialistID IS NULL))
AND ((RS.DepartmentId = @DepartmentID AND @DepartmentID IS NOT NULL) or (@DepartmentID IS NULL))
AND (@LocationID is NOT NULL OR L.IsConsulting = 0)
AND L.IsActive = 1
GROUP BY
CASE
WHEN @Group1 = 1 THEN CONVERT(Varchar(100), R.LocationID)
WHEN @Group1 = 2 THEN CONVERT(Varchar(100), R.SubLocation)
WHEN @Group1 = 3 THEN CONVERT(Varchar(100), R.ProgramTypeID)
WHEN @Group1 = 4 THEN CONVERT(Varchar(100), RS.SupervisorID)
WHEN @Group1 = 5 THEN CONVERT(Varchar(100), R.TransactionTypeId)
WHEN @Group1 = 6 THEN CONVERT(Varchar(100), RS.SpecialistID)
WHEN @Group1 = 7 THEN CONVERT(Varchar(100), R.ChecklistTypeID)
WHEN @Group1 = 8 THEN CONVERT(Varchar(100), RS.DepartmentID)
WHEN @Group1 = 9 THEN CONVERT(Varchar(2), DATEPART(MONTH,R.EffectiveActionDate)) + '/' + CONVERT(VARCHAR(4),DATEPART(YEAR,R.EffectiveActionDate))
WHEN @Group1 = 10 THEN CONVERT(Varchar(100), R.ReviewedBy)
END,
CASE
WHEN @Group2 = 1 THEN CONVERT(Varchar(100), R.SubLocation)
WHEN @Group2 = 2 THEN CONVERT(Varchar(100), R.ProgramTypeID)
WHEN @Group2 = 3 THEN CONVERT(Varchar(100), RS.SupervisorID)
WHEN @Group2 = 4 THEN CONVERT(Varchar(100), RS.SpecialistID)
WHEN @Group2 = 5 THEN CONVERT(Varchar(100), R.TransactionTypeId)
WHEN @Group2 = 6 THEN CONVERT(Varchar(100), R.LocationID)
WHEN @Group2 = 7 THEN CONVERT(Varchar(100), R.ChecklistTypeId)
WHEN @Group2 = 8 THEN CONVERT(Varchar(100), RS.DepartmentID)
WHEN @Group2 = 9 THEN CONVERT(Varchar(2), DATEPART(MONTH,R.EffectiveActionDate)) + '/' + CONVERT(VARCHAR(4),DATEPART(YEAR,R.EffectiveActionDate))
WHEN @Group2 = 10 THEN CONVERT(Varchar(100), R.ReviewedBy)
ELSE NULL
END
这是解释计划：
|--Stream Aggregate(GROUP BY:([Expr1015], [Expr1014]) DEFINE:([Expr1016]=SUM((0)), [Expr1017]=SUM(CASE WHEN [_DatabaseTesta].[dbo].[Review].[ReviewStatusId] as [R].[ReviewStatusId]=(7) AND [_DatabaseTesta].[dbo].[Review].[ReviewStatusModified] as [R].[Re 3 4 3 Stream Aggregate
|--Sort(ORDER BY:([Expr1015] ASC, [Expr1014] ASC)) 3 5 4 Sort
|--Compute Scalar(DEFINE:([Expr1014]=CASE WHEN [@Group1]=(1) THEN CONVERT(varchar(100),[_DatabaseTesta].[dbo].[Review].[LocationId] as [R].[LocationId],0) ELSE CASE WHEN [@Group1]=(10) THEN CONVERT(varchar(100),[_DatabaseTesta].[dbo].[Review].[ 3 6 5 Compute Scalar
|--Filter(WHERE:(([_DatabaseTesta].[dbo].[ReviewSpecialist].[SupervisorId]=CONVERT_IMPLICIT(uniqueidentifier,[@SupervisorID],0) AND [@SupervisorID] IS NOT NULL OR [@SupervisorID] IS NULL) AND ([_DatabaseTesta].[dbo].[ReviewSpecialist].[Spe 3 7 6 Filter
|--Nested Loops(Left Outer Join, OUTER REFERENCES:([R].[Id])) 3 8 7 Nested Loops
|--Nested Loops(Inner Join, OUTER REFERENCES:([U].[locationID])) 3 9 8 Nested Loops
| |--Nested Loops(Inner Join, WHERE:([_DatabaseTesta].[dbo].[Review].[LocationId] as [R].[LocationId]=[_DatabaseTesta].[dbo].[_SOC_USER].[locationID] as [U].[locationID])) 3 10 9 Nested Loops
| | |--Sort(ORDER BY:([R].[Id] ASC)) 3 11 10 Sort
| | | |--Compute Scalar(DEFINE:([Expr1047]=CASE WHEN [_DatabaseTesta].[dbo].[Review].[ReviewStatusId] as [R].[ReviewStatusId]=(16) OR [_DatabaseTesta].[dbo].[Review].[ReviewStatusId] as [R].[ReviewStatusId]=(14) OR [Qual 3 12 11 Compute Scalar
| | | |--Nested Loops(Inner Join, OUTER REFERENCES:([R].[Id], [Expr1056]) WITH UNORDERED PREFETCH) 3 13 12 Nested Loops
| | | |--Hash Match(Inner Join, HASH:([R].[Id])=([R].[Id])) 3 16 13 Hash Match
| | | | |--Index Scan(OBJECT:([_DatabaseTesta].[dbo].[Review].[idxReview_Status_Loc] AS [R]), WHERE:(([_DatabaseTesta].[dbo].[Review].[LocationId] as [R].[LocationId]=[@LocationID] AND [@LocationID] IS NOT 3 17 16 Index Scan
| | | | |--Index Scan(OBJECT:([_DatabaseTesta].[dbo].[Review].[idx_Review_TenantID_QCType] AS [R]), WHERE:([_DatabaseTesta].[dbo].[Review].[ChecklistTypeId] as [R].[ChecklistTypeId]=[@QCType] AND [@QCType] 3 18 16 Index Scan
| | | |--Clustered Index Seek(OBJECT:([_DatabaseTesta].[dbo].[Review].[PK_Review] AS [R]), SEEK:([R].[Id]=[_DatabaseTesta].[dbo].[Review].[Id] as [R].[Id]), WHERE:([_DatabaseTesta].[dbo].[Review].[SubLocation] 3 32 13 Clustered Index Seek
| | |--Table Scan(OBJECT:([_DatabaseTesta].[dbo].[_SOC_USER] AS [U])) 3 41 10 Table Scan
| |--Clustered Index Seek(OBJECT:([_DatabaseTesta].[dbo].[Location].[PK_Location] AS [L]), SEEK:([L].[Id]=[_DatabaseTesta].[dbo].[_SOC_USER].[locationID] as [U].[locationID]), WHERE:([_DatabaseTesta].[dbo].[Location].[IsActiv 3 43 9 Clustered Index Seek
|--Nested Loops(Left Semi Join, WHERE:([_DatabaseTesta].[dbo].[ReviewSpecialist].[Id]=[Expr1008])) 3 44 8 Nested Loops
|--Nested Loops(Inner Join, OUTER REFERENCES:([_DatabaseTesta].[dbo].[ReviewSpecialist].[Id])) 3 45 44 Nested Loops
| |--Index Seek(OBJECT:([_DatabaseTesta].[dbo].[ReviewSpecialist].[idxReviewSpecialist_ReviewID]), SEEK:([_DatabaseTesta].[dbo].[ReviewSpecialist].[ReviewId]=[_DatabaseTesta].[dbo].[Review].[Id] as [R].[Id]) ORDERED FORWA 3 46 45 Index Seek
| |--Clustered Index Seek(OBJECT:([_DatabaseTesta].[dbo].[ReviewSpecialist].[PK_ReviewSpecialist]), SEEK:([_DatabaseTesta].[dbo].[ReviewSpecialist].[Id]=[_DatabaseTesta].[dbo].[ReviewSpecialist].[Id]) LOOKUP ORDERED FORWA 3 48 45 Clustered Index Seek
|--Table Spool 3 56 44 Table Spool
|--Stream Aggregate(GROUP BY:([_DatabaseTesta].[dbo].[ReviewSpecialist].[ReviewId]) DEFINE:([Expr1008]=MIN([_DatabaseTesta].[dbo].[ReviewSpecialist].[Id]))) 3 57 56 Stream Aggregate
|--Sort(ORDER BY:([_DatabaseTesta].[dbo].[ReviewSpecialist].[ReviewId] ASC)) 3 58 57 Sort
|--Clustered Index Scan(OBJECT:([_DatabaseTesta].[dbo].[ReviewSpecialist].[PK_ReviewSpecialist]), WHERE:([_DatabaseTesta].[dbo].[ReviewSpecialist].[SpecialistId]=isnull(CONVERT_IMPLICIT(uniqueidentifier,[@Spec 3 59 58 Clustered Index Scan