Je travaille sur l'optimisation de certaines requêtes.
Pour la requête ci-dessous,
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);
J'ai créé l'index FILTRÉ suivant:
-- 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);
Cet index n'est pas utilisé uniquement pour cette requête en particulier, il existe d'autres requêtes qui utilisent ce même index, donc les colonnes INCLUDED.
Pour cette requête en particulier, je veux juste vérifier (EXISTE) si une commande a un article où decCatItemPrice > 0
.
SQL Server effectue une analyse d'index comme vous pouvez le voir dans les images ci-dessous.
- Les statistiques viennent d'être mises à jour.
- Le tableau des éléments comporte 41 208 lignes en test.
Veuillez noter que je ne sélectionne aucune colonne dans le tableau des éléments.
Ce tableau d'articles a 164 309 397 en direct. Je voudrais éviter une analyse là-bas.
des questions:
Pourquoi SQL Server ne fait-il pas de recherche d'index?
Y a-t-il d'autres facteurs / éléments à prendre en compte pour améliorer cette requête?
(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)
c'est la définition et les index de la table tblBorderItem
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 = 95
c'est la définition et les index de la table tblBorder
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])
Conclusion
J'ai appliqué mon index sur le système LIVE et mis à jour ma procédure stockée pour utiliser SMALLDATETIME, afin de faire correspondre les types de données dans la base de données pour les colonnes impliquées.
Après cela, lorsque je regarde le plan de requête, je vois l'image ci-dessous:
c'était exactement comme je le voulais.
Je pense que l'optimiseur de requêtes dans ce cas a fait un bon travail pour obtenir le meilleur plan de requête sur les deux environnements, et je suis heureux de ne pas avoir ajouté d'indices de requête.
J'ai appris avec les 3 réponses affichées. merci à Max Vernon , Paul White et Daniel Hutmacher pour leurs réponses.
la source