Saya mencoba memecahkan masalah dalam menjalankan permintaan yang lambat menggunakan Show Plan Analysis (SSMS) pada rencana eksekusi yang sebenarnya. Alat Analisis menunjukkan bahwa perkiraan jumlah baris tidak aktif dari hasil yang dikembalikan di beberapa tempat dalam rencana dan selanjutnya memberi saya beberapa peringatan konversi implisit.
Saya tidak mengerti konversi implisit ini int ke Varchar- Bidang yang direferensikan bukan bagian dari parameter / filter pada permintaan dan di semua tabel yang terlibat jenis data kolom adalah sama:
Saya mendapatkan di bawah ini Peringatan Kardinalitas:
Ketik konversi dalam ekspresi (CONVERT_IMPLICIT (varchar (12), [ccd]. [Profileid], 0)) dapat memengaruhi "CardinalityEstimate" dalam pilihan rencana kueri - Bidang ini adalah bilangan bulat di mana saja di DB saya
Ketik konversi dalam ekspresi (CONVERT_IMPLICIT (varchar (6), [ccd]. [Nodeid], 0)) dapat memengaruhi "CardinalityEstimate" dalam pilihan rencana kueri - Bidang ini kecil di mana-mana di DB saya
Ketik konversi dalam ekspresi (CONVERT_IMPLICIT (varchar (6), [ccd]. [Sessioneqnum], 0)) dapat memengaruhi "CardinalityEstimate" dalam pilihan rencana kueri - Bidang ini adalah sebuah titik kecil di mana-mana di DB saya
Ketik konversi dalam ekspresi (CONVERT_IMPLICIT (varchar (41), [ccd]. [Sessionid], 0)) dapat memengaruhi "CardinalityEstimate" dalam pilihan rencana kueri - Bidang ini adalah desimal di mana-mana di DB saya
[EDIT] Berikut ini adalah kueri dan rencana eksekusi aktual untuk referensi https://www.brentozar.com/pastetheplan/?id=SysYt0NzN
Dan definisi tabel ..
/****** Object: Table [dbo].[agentconnectiondetail] Script Date: 1/10/2019 9:10:04 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[agentconnectiondetail](
[sessionid] [decimal](18, 0) NOT NULL,
[sessionseqnum] [smallint] NOT NULL,
[nodeid] [smallint] NOT NULL,
[profileid] [int] NOT NULL,
[resourceid] [int] NOT NULL,
[startdatetime] [datetime2](7) NOT NULL,
[enddatetime] [datetime2](7) NOT NULL,
[qindex] [smallint] NOT NULL,
[gmtoffset] [smallint] NOT NULL,
[ringtime] [smallint] NULL,
[talktime] [smallint] NULL,
[holdtime] [smallint] NULL,
[worktime] [smallint] NULL,
[callwrapupdata] [varchar](40) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[callresult] [smallint] NULL,
[dialinglistid] [int] NULL,
[convertedStartDatetimelocal] [datetime2](7) NULL,
[convertedEndDatetimelocal] [datetime2](7) NULL,
CONSTRAINT [PK_agentconnectiondetail] PRIMARY KEY CLUSTERED
(
[sessionid] ASC,
[sessionseqnum] ASC,
[nodeid] ASC,
[profileid] ASC,
[resourceid] ASC,
[startdatetime] ASC,
[qindex] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
/****** Object: Table [dbo].[contactcalldetail] Script Date: 1/10/2019 9:10:04 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[contactcalldetail](
[sessionid] [decimal](18, 0) NOT NULL,
[sessionseqnum] [smallint] NOT NULL,
[nodeid] [smallint] NOT NULL,
[profileid] [int] NOT NULL,
[contacttype] [smallint] NOT NULL,
[contactTypeDescription] [varchar](20) COLLATE Latin1_General_CI_AS NULL,
[contactdisposition] [smallint] NOT NULL,
[contactdispositionDescription] [varchar](20) COLLATE Latin1_General_CI_AS NULL,
[dispositionreason] [varchar](100) COLLATE Latin1_General_CI_AS NULL,
[originatortype] [smallint] NOT NULL,
[originatorTypeDescription] [varchar](20) COLLATE Latin1_General_CI_AS NULL,
[originatorid] [int] NULL,
[originatordn] [varchar](30) COLLATE Latin1_General_CI_AS NULL,
[destinationtype] [smallint] NULL,
[destinationTypeDescription] [varchar](20) COLLATE Latin1_General_CI_AS NULL,
[destinationid] [int] NULL,
[destinationdn] [varchar](30) COLLATE Latin1_General_CI_AS NULL,
[startdatetimeUTC] [datetime2](7) NOT NULL,
[enddatetimeUTC] [datetime2](7) NOT NULL,
[gmtoffset] [smallint] NOT NULL,
[callednumber] [varchar](30) COLLATE Latin1_General_CI_AS NULL,
[origcallednumber] [varchar](30) COLLATE Latin1_General_CI_AS NULL,
[applicationtaskid] [decimal](18, 0) NULL,
[applicationid] [int] NULL,
[applicationname] [varchar](30) COLLATE Latin1_General_CI_AS NULL,
[connecttime] [smallint] NULL,
[customvariable1] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable2] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable3] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable4] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable5] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable6] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable7] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable8] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable9] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[customvariable10] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[accountnumber] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[callerentereddigits] [varchar](40) COLLATE Latin1_General_CI_AS NULL,
[badcalltag] [char](1) COLLATE Latin1_General_CI_AS NULL,
[transfer] [bit] NULL,
[NextSeqNum] [smallint] NULL,
[redirect] [bit] NULL,
[conference] [bit] NULL,
[flowout] [bit] NULL,
[metservicelevel] [bit] NULL,
[campaignid] [int] NULL,
[origprotocolcallref] [varchar](32) COLLATE Latin1_General_CI_AS NULL,
[destprotocolcallref] [varchar](32) COLLATE Latin1_General_CI_AS NULL,
[convertedStartDatetimelocal] [datetime2](7) NULL,
[convertedEndDatetimelocal] [datetime2](7) NULL,
[AltKey] AS (concat([sessionid],[sessionseqnum],[nodeid],[profileid]) collate database_default) PERSISTED NOT NULL,
[PrvSeqNum] [smallint] NULL,
CONSTRAINT [PK_contactcalldetail] PRIMARY KEY CLUSTERED
(
[sessionid] ASC,
[sessionseqnum] ASC,
[nodeid] ASC,
[profileid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
/****** Object: Table [dbo].[contactqueuedetail] Script Date: 1/10/2019 9:10:04 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[contactqueuedetail](
[sessionid] [decimal](18, 0) NOT NULL,
[sessionseqnum] [smallint] NOT NULL,
[profileid] [int] NOT NULL,
[nodeid] [smallint] NOT NULL,
[targetid] [int] NOT NULL,
[targettype] [smallint] NOT NULL,
[targetTypeDescription] [varchar](10) COLLATE Latin1_General_CI_AS NULL,
[qindex] [smallint] NOT NULL,
[queueorder] [smallint] NOT NULL,
[disposition] [smallint] NULL,
[dispositionDescription] [varchar](50) COLLATE Latin1_General_CI_AS NULL,
[metservicelevel] [bit] NULL,
[queuetime] [smallint] NULL,
CONSTRAINT [PK_contactqueuedetail] PRIMARY KEY CLUSTERED
(
[sessionid] ASC,
[sessionseqnum] ASC,
[profileid] ASC,
[nodeid] ASC,
[targetid] ASC,
[targettype] ASC,
[qindex] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
/****** Object: Index [<Name of Missing Index, sysname,>] Script Date: 1/10/2019 9:10:04 AM ******/
CREATE NONCLUSTERED INDEX [<Name of Missing Index, sysname,>] ON [dbo].[contactcalldetail]
(
[convertedStartDatetimelocal] ASC
)
INCLUDE ( [sessionid],
[sessionseqnum],
[nodeid],
[profileid]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO
/****** Object: Index [idx_CCD_ContactType_DestType_StDtLocal] Script Date: 1/10/2019 9:10:04 AM ******/
CREATE NONCLUSTERED INDEX [idx_CCD_ContactType_DestType_StDtLocal] ON [dbo].[contactcalldetail]
(
[destinationtype] ASC,
[contacttype] ASC,
[convertedStartDatetimelocal] ASC
)
INCLUDE ( [sessionid],
[sessionseqnum],
[nodeid],
[profileid],
[convertedEndDatetimelocal]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO
SET ANSI_PADDING ON
GO
/****** Object: Index [idx_CQD_Profile_Traget_TargetType] Script Date: 1/10/2019 9:10:04 AM ******/
CREATE NONCLUSTERED INDEX [idx_CQD_Profile_Traget_TargetType] ON [dbo].[contactqueuedetail]
(
[profileid] ASC,
[targetid] ASC,
[targettype] ASC
)
INCLUDE ( [targetTypeDescription],
[queueorder],
[disposition],
[dispositionDescription],
[queuetime]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
GO