আমি কিছু প্রশ্নের অনুকূলিতকরণ কাজ করছি।
নীচের প্রশ্নের জন্য,
SET STATISTICS IO ON;
DECLARE @OrderStartDate DATETIME2 = '27 feb 2016';
DECLARE @OrderEndDate DATETIME2 = '28 feb 2016';
SELECT o.strBxOrderNo
, o.sintOrderStatusID
, o.sintOrderChannelID
, o.sintOrderTypeID
, o.sdtmOrdCreated
, o.sintMarketID
, o.strOrderKey
, o.strOfferCode
, o.strCurrencyCode
, o.decBCShipFullPrice
, o.decBCShipFinal
, o.decBCShipTax
, o.decBCTotalAmount
, o.decWrittenTotalAmount
, o.decBCWrittenTotalAmount
, o.decBCShipOfferDisc
, o.decBCShipOverride
, o.decTotalAmount
, o.decShipTax
, o.decShipFinal
, o.decShipOverride
, o.decShipOfferDisc
, o.decShipFullPrice
, o.lngAccountParticipantID
, CONVERT(DATE, o.sdtmOrdCreated, 120) as OrderCreatedDateConverted
FROM tablebackups.dbo.tblBOrder o
WHERE o.sdtmOrdCreated >= @OrderStartDate
AND o.sdtmOrdCreated < @OrderEndDate
AND EXISTS (
SELECT *
FROM tablebackups.dbo.tblBOrderItem oi
WHERE oi.strBxOrderNo = o.strBxOrderNo
AND oi.decCatItemPrice > 0
)
OPTION (RECOMPILE);
আমি নিম্নলিখিত ফিল্টারড সূচক তৈরি করেছি:
-- table dbo.tblBorderItem
CREATE NONCLUSTERED INDEX IX_tblBOrderItem_decCatItemPrice_INCL
ON dbo.tblBorderItem
(
strBxOrderNo ASC
, sintOrderSeqNo ASC
, decCatItemPrice
)
INCLUDE
(
blnChargeShipping
, decBCCatItemPrice
, decBCCostPrice
, decBCFinalPrice
, decBCOfferDiscount
, decBCOverrideDiscount
, decBCTaxAmount
, decCostPrice
, decFinalPrice
, decOfferDiscount
, decOverrideDiscount
, decTaxAmount
, decWasPrice
, dtmOrdItemCreated
, sintOrderItemStatusId
, sintOrderItemType
, sintQuantity
, strItemNo
)
WHERE decCatItemPrice > 0
WITH (DROP_EXISTING = ON, FILLFACTOR = 95);এই সূচকটি কেবলমাত্র এই ক্যোয়ারির জন্য বিশেষত ব্যবহৃত হয় না, এমন অন্যান্য প্রশ্ন রয়েছে যা এই সূচকটি ব্যবহার করে, সুতরাং কলামগুলি অন্তর্ভুক্ত।
বিশেষত এই ক্যোয়ারির জন্য, আমি যদি কেবল অর্ডারতে কোনও আইটেম থাকে তবে কেবলমাত্র (উপস্থিতি) পরীক্ষা করতে চাই decCatItemPrice > 0।
এসকিউএল সার্ভার একটি সূচক স্ক্যান করছে যা আপনি নীচের ছবিগুলিতে দেখতে পাচ্ছেন।
- পরিসংখ্যান সবেমাত্র আপডেট করা হয়েছে।
- আইটেম সারণিতে পরীক্ষায় 41,208 সারি রয়েছে।
দয়া করে মনে রাখবেন, আমি আইটেম টেবিল থেকে কোনও কলাম নির্বাচন করি না।
এই আইটেমের টেবিলটিতে 164,309,397 লাইভ রয়েছে। আমি সেখানে স্ক্যান এড়াতে চাই।
প্রশ্ন:
এসকিউএল সার্ভার কেন একটি সূচক সন্ধান করছে না?
এই কোয়েরিটির উন্নতি করার জন্য আমার অন্যান্য বিবেচনা করা উচিত?
(4537 row(s) affected) Table 'tblBorder'. Scan count 1, logical reads
116, physical reads 0, read-ahead reads 0, lob logical reads 0, lob
physical reads 0, lob read-ahead reads 0. Table 'tblBorderItem'. Scan
count 1, logical reads 689, physical reads 0, read-ahead reads 0, lob
logical reads 0, lob physical reads 0, lob read-ahead reads 0.
(1 row(s) affected)
এই সংজ্ঞা এবং টেবিল tblBorderItem এর সূচী হয়
IF OBJECT_ID('[dbo].[tblBorderItem]') IS NOT NULL
DROP TABLE [dbo].[tblBorderItem]
GO
CREATE TABLE [dbo].[tblBorderItem] (
[strBxOrderNo] VARCHAR(20) NOT NULL,
[sintOrderSeqNo] SMALLINT NOT NULL,
[sintOrderItemStatusId] SMALLINT NOT NULL,
[sintNameStructureID] SMALLINT NOT NULL,
[strItemNo] VARCHAR(20) NOT NULL,
[sintQuantity] SMALLINT NOT NULL,
[strCurrencyCode] VARCHAR(3) NOT NULL,
[decCostPrice] DECIMAL(18,4) NOT NULL,
[decCatItemPrice] DECIMAL(18,2) NOT NULL,
[decOfferDiscount] DECIMAL(18,2) NOT NULL,
[decOverrideDiscount] DECIMAL(18,2) NOT NULL,
[decFinalPrice] DECIMAL(18,2) NOT NULL,
[decTaxAmount] DECIMAL(18,2) NOT NULL,
[strBCCurrencyCode] VARCHAR(3) NOT NULL,
[decBCCostPrice] DECIMAL(18,4) NOT NULL,
[decBCCatItemPrice] DECIMAL(18,4) NOT NULL,
[decBCOfferDiscount] DECIMAL(18,4) NOT NULL,
[decBCOverrideDiscount] DECIMAL(18,4) NOT NULL,
[decBCFinalPrice] DECIMAL(18,4) NOT NULL,
[decBCTaxAmount] DECIMAL(18,4) NOT NULL,
[dtmOrdItemCreated] DATETIME NOT NULL,
[blnChargeShipping] BIT NOT NULL,
[lngTimeOfOrderQtyOnHand] INT NULL,
[sdtmTimeOfOrderDueDate] SMALLDATETIME NULL,
[lngProdSetSeqNo] INT NULL,
[lngProdRelationId] INT NULL,
[lngProdRelationMemberId] INT NULL,
[decWasPrice] DECIMAL(18,2) NULL,
[sintOrderItemType] SMALLINT NULL,
[tsRowVersion] TIMESTAMP NULL,
[sdtmOrderItemStatusUpdated] SMALLDATETIME NULL,
CONSTRAINT [PK_tblBOrderItem]
PRIMARY KEY CLUSTERED
([strBxOrderNo] asc, [sintOrderSeqNo] asc)
WITH FILLFACTOR = 100)
GO
CREATE NONCLUSTERED INDEX
[IX_tblBOrderItem__dtmOrdItemCreated]
ON [dbo].[tblBorderItem] ([dtmOrdItemCreated] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX [IX_tblBOrderItem__sintOrderItemStatusId]
ON [dbo].[tblBorderItem] ([sintOrderItemStatusId] asc)
INCLUDE ([sdtmOrderItemStatusUpdated],
[sintOrderSeqNo], [strBxOrderNo], [strItemNo])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX [IX_tblBOrderItem__
sintOrderItemStatusId_decFinalPrice_
sdtmOrderItemStatusUpdated_
include_strBxOrderNo]
ON [dbo].[tblBorderItem]
([sintOrderItemStatusId] asc,
[decFinalPrice] asc,
[sdtmOrderItemStatusUpdated] asc)
INCLUDE ([strBxOrderNo])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX [IX_tblBOrderItem__strBxOrderNo]
ON [dbo].[tblBorderItem]
([strBxOrderNo] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX [IX_tblBOrderItem__strItemNo]
ON [dbo].[tblBorderItem] ([strItemNo] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrderItem_decCatItemPrice_INCL]
ON [dbo].[tblBorderItem]
([strBxOrderNo] asc, [sintOrderSeqNo] asc, [decCatItemPrice] asc)
INCLUDE ([blnChargeShipping],
[decBCCatItemPrice], [decBCCostPrice], [decBCFinalPrice],
[decBCOfferDiscount], [decBCOverrideDiscount],
[decBCTaxAmount], [decCostPrice], [decFinalPrice],
[decOfferDiscount], [decOverrideDiscount],
[decTaxAmount], [decWasPrice], [dtmOrdItemCreated],
[sintOrderItemStatusId], [sintOrderItemType],
[sintQuantity], [strItemNo])
WHERE ([decCatItemPrice]>(0))
WITH FILLFACTOR = 95এটি টেবিল টিবিএলবোর্ডারের সংজ্ঞা এবং সূচিগুলি
IF OBJECT_ID('[dbo].[tblBorder]') IS NOT NULL
DROP TABLE [dbo].[tblBorder]
GO
CREATE TABLE [dbo].[tblBorder] (
[strBxOrderNo] VARCHAR(20) NOT NULL,
[uidOrderUniqueID] UNIQUEIDENTIFIER NOT NULL,
[sintOrderStatusID] SMALLINT NOT NULL,
[sintOrderChannelID] SMALLINT NOT NULL,
[sintOrderTypeID] SMALLINT NOT NULL,
[blnIsBasket] BIT NOT NULL,
[sdtmOrdCreated] SMALLDATETIME NOT NULL,
[sintMarketID] SMALLINT NOT NULL,
[strOrderKey] VARCHAR(20) NOT NULL,
[strOfferCode] VARCHAR(20) NOT NULL,
[lngShippedToParticipantID] INT NOT NULL,
[lngOrderedByParticipantID] INT NOT NULL,
[lngShipToAddressID] INT NOT NULL,
[lngAccountAddressID] INT NOT NULL,
[lngAccountParticipantID] INT NOT NULL,
[lngOrderedByAddressID] INT NOT NULL,
[lngOrderTakenBy] INT NOT NULL,
[strCurrencyCode] VARCHAR(3) NOT NULL,
[decShipFullPrice] DECIMAL(18,2) NOT NULL,
[decShipOfferDisc] DECIMAL(18,2) NOT NULL,
[decShipOverride] DECIMAL(18,2) NOT NULL,
[decShipFinal] DECIMAL(18,2) NOT NULL,
[decShipTax] DECIMAL(18,2) NOT NULL,
[strBCCurrencyCode] VARCHAR(3) NOT NULL,
[decBCShipFullPrice] DECIMAL(18,4) NOT NULL,
[decBCShipOfferDisc] DECIMAL(18,4) NOT NULL,
[decBCShipOverride] DECIMAL(18,4) NOT NULL,
[decBCShipFinal] DECIMAL(18,4) NOT NULL,
[decBCShipTax] DECIMAL(18,4) NOT NULL,
[decTotalAmount] DECIMAL(18,2) NOT NULL,
[decBCTotalAmount] DECIMAL(18,4) NOT NULL,
[decWrittenTotalAmount] DECIMAL(18,2) NULL,
[decBCWrittenTotalAmount] DECIMAL(18,4) NULL,
[blnProRataShipping] BIT NOT NULL,
[blnChargeWithFirstShipment] BIT NOT NULL,
[sintShippingServiceLevelID] SMALLINT NOT NULL,
[sintShippingMethodID] SMALLINT NOT NULL,
[sdtmDoNotShipUntil] SMALLDATETIME NULL,
[blnHoldUntilComplete] BIT NOT NULL,
[tsRowVersion] TIMESTAMP NULL,
CONSTRAINT [PK_tblBOrder]
PRIMARY KEY CLUSTERED
([strBxOrderNo] asc) WITH FILLFACTOR = 100)
GO
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngAccountAddressID]
ON [dbo].[tblBorder]
([lngAccountAddressID] asc, [sintOrderStatusID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngAccountParticipantID]
ON [dbo].[tblBorder]
([lngAccountParticipantID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngOrderedByAddressID]
ON [dbo].[tblBorder]
([lngOrderedByAddressID] asc, [sintOrderStatusID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngOrderedByParticipantID]
ON [dbo].[tblBorder] ([lngOrderedByParticipantID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngShippedToParticipantID]
ON [dbo].[tblBorder]
([lngShippedToParticipantID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__lngShipToAddressID]
ON [dbo].[tblBorder]
([lngShipToAddressID] asc, [sintOrderStatusID] asc)
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder__sdtmOrdCreated_sintMarketID__include_strBxOrderNo]
ON [dbo].[tblBorder]
([sdtmOrdCreated] asc, [sintMarketID] asc)
INCLUDE ([strBxOrderNo])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX
[IX_tblBOrder_sdtmOrdCreated_INCL]
ON [dbo].[tblBorder]
([sdtmOrdCreated] asc)
INCLUDE ([decBCShipFinal], [decBCShipFullPrice],
[decBCShipOfferDisc], [decBCShipOverride],
[decBCShipTax], [decBCTotalAmount], [decBCWrittenTotalAmount],
[decShipFinal], [decShipFullPrice], [decShipOfferDisc],
[decShipOverride], [decShipTax], [decTotalAmount],
[decWrittenTotalAmount], [lngAccountParticipantID],
[lngOrderedByParticipantID], [sintMarketID],
[sintOrderChannelID], [sintOrderStatusID],
[sintOrderTypeID], [strBxOrderNo], [strCurrencyCode],
[strOfferCode], [strOrderKey])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED
INDEX [IX_tblBOrder_sintMarketID_sdtmOrdCreated]
ON [dbo].[tblBorder]
([sintMarketID] asc, [sdtmOrdCreated] asc)
INCLUDE ([sintOrderChannelID], [strBxOrderNo])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED
INDEX [IX_tblBOrder__sintOrderChannelID_sdtmOrdCreated_INCL]
ON [dbo].[tblBorder]
([sintOrderChannelID] asc, [sdtmOrdCreated] asc)
INCLUDE ([decBCShipFinal], [decBCShipFullPrice],
[decBCShipTax], [decShipFinal], [decShipFullPrice],
[decShipTax], [lngAccountParticipantID], [sintMarketID],
[sintOrderTypeID], [strBxOrderNo],
[strCurrencyCode], [strOrderKey])
WITH FILLFACTOR = 100
CREATE NONCLUSTERED INDEX [IX_tblBOrder_strBxOrderNo_sdtmOrdCreated_incl]
ON [dbo].[tblBorder] ([strBxOrderNo] asc,
[sdtmOrdCreated] asc)
INCLUDE ([sintOrderChannelID], [sintOrderTypeID], [sintMarketID],
[strOrderKey], [lngAccountParticipantID], [strCurrencyCode],
[decShipFullPrice], [decShipFinal], [decShipTax],
[decBCShipFullPrice], [decBCShipFinal],
[decBCShipTax])উপসংহার
আমি লাইভ সিস্টেমে আমার সূচকটি প্রয়োগ করেছি এবং জড়িত কলামগুলির জন্য ডেটাবেজে ডাটা প্রকারের সাথে মেলে যাতে ছোট ছোট ব্যবহার করার জন্য আমার সঞ্চিত পদ্ধতি আপডেট করেছি।
এর পরে, ক্যোয়ারী প্ল্যানটি দেখার সময় আমি নীচের ছবিটি দেখছি:
এটি ঠিক কীভাবে আমি এটি হতে চেয়েছিলাম।
আমি মনে করি এই ক্ষেত্রে ক্যোয়ারী অপ্টিমাইজার উভয় পরিবেশে সর্বোত্তম ক্যোয়ারী পরিকল্পনা পেতে ভাল কাজ করেছে এবং আমি খুশী যে আমি কোনও ক্যোয়ারির ইঙ্গিতগুলি যোগ না করলাম।
পোস্ট করা 3 টি উত্তর দিয়ে শিখেছি। ধন্যবাদ ম্যাক্স ভারনন , পল হোয়াইট এবং ড্যানিয়েল Hutmacher তাদের উত্তরের জন্য।
