Dan*_*örk 6 performance sql-server execution-plan sql-server-2014 query-performance
我有一个不会在生产服务器上运行但它在测试服务器上运行的查询。查询计划似乎无法编译或编译的查询计划非常糟糕。我已经用全扫描更新了所有统计信息，并重建了所有相关表的索引，但没有成功，任何表中的行都没有那么多。我无法更改查询，因为它是 AOS (AX 2012) 创建的。我应该怎么做才能按原样使用查询？
DECLARE @P1 AS BIGINT = 5637144576
DECLARE @P2 AS NVARCHAR(4) = N'1003'
DECLARE @P3 AS INT = 212
DECLARE @P4 AS BIGINT = 5638885273
DECLARE @P5 AS BIGINT = 5637144576
DECLARE @P6 AS INT = 865
DECLARE @P7 AS BIGINT = 5637144576
DECLARE @P8 AS BIGINT = 5637144576
SELECT t1.balance01,
t1.recid,
t2.amountcur,
t2.dataareaid,
t2.recid,
t3.recid,
t3.voucher,
t3.accountnum,
t3.approved,
t3.closed,
t3.dataareaid,
t4.party,
t4.dataareaid,
t4.recid
FROM spectrans T1
CROSS JOIN custtransopen T2
CROSS JOIN custtrans T3
CROSS JOIN
(
SELECT virt.id AS dataareaid ,
t4.accountnum,
t4.party,
t4.partition,
t4.recid
FROM custtable T4
INNER JOIN virtualdataarealist VIRT
ON t4.dataareaid = virt.virtualdataarea
UNION ALL
SELECT t4.dataareaid ,
t4.accountnum,
t4.party,
t4.partition,
t4.recid
FROM custtable T4
INNER JOIN dataarea DAT
ON (
t4.dataareaid = dat.id
AND dat.isvirtual = 0)) T4
WHERE ((
t1.partition=@P1)
AND (((
t1.speccompany=@P2)
AND (
t1.spectableid=@P3))
AND (
t1.specrecid=@P4)))
AND ((
t2.partition=@P5)
AND (((
t1.refcompany=t2.dataareaid)
AND (
t1.reftableid=@P6))
AND (
t1.refrecid=t2.recid)))
AND ((
t3.partition=@P7)
AND (
t2.refrecid=t3.recid
AND (
t2.dataareaid = t3.dataareaid)
AND (
t2.partition = t3.partition)))
AND ((
t4.partition=@P8)
AND (
t3.accountnum=t4.accountnum
AND (
t3.dataareaid = t4.dataareaid)
AND (
t3.partition = t4.partition)))
OPTION (RECOMPILE)，也DBCC FREEPROCCACHEPROD 和 TEST 之间的差异表“sys.configurations”：
DECLARE @P1 AS BIGINT = 5637144576
DECLARE @P2 AS NVARCHAR(4) = N'1003'
DECLARE @P3 AS INT = 212
DECLARE @P4 AS BIGINT = 5638885273
DECLARE @P5 AS BIGINT = 5637144576
DECLARE @P6 AS INT = 865
DECLARE @P7 AS BIGINT = 5637144576
DECLARE @P8 AS BIGINT = 5637144576
SELECT t1.balance01,
t1.recid,
t2.amountcur,
t2.dataareaid,
t2.recid,
t3.recid,
t3.voucher,
t3.accountnum,
t3.approved,
t3.closed,
t3.dataareaid,
t4.party,
t4.dataareaid,
t4.recid
FROM spectrans T1
CROSS JOIN custtransopen T2
CROSS JOIN custtrans T3
CROSS JOIN
(
SELECT virt.id AS dataareaid ,
t4.accountnum,
t4.party,
t4.partition,
t4.recid
FROM custtable T4
INNER JOIN virtualdataarealist VIRT
ON t4.dataareaid = virt.virtualdataarea
UNION ALL
SELECT t4.dataareaid ,
t4.accountnum,
t4.party,
t4.partition,
t4.recid
FROM custtable T4
INNER JOIN dataarea DAT
ON (
t4.dataareaid = dat.id
AND dat.isvirtual = 0)) T4
WHERE ((
t1.partition=@P1)
AND (((
t1.speccompany=@P2)
AND (
t1.spectableid=@P3))
AND (
t1.specrecid=@P4)))
AND ((
t2.partition=@P5)
AND (((
t1.refcompany=t2.dataareaid)
AND (
t1.reftableid=@P6))
AND (
t1.refrecid=t2.recid)))
AND ((
t3.partition=@P7)
AND (
t2.refrecid=t3.recid
AND (
t2.dataareaid = t3.dataareaid)
AND (
t2.partition = t3.partition)))
AND ((
t4.partition=@P8)
AND (
t3.accountnum=t4.accountnum
AND (
t3.dataareaid = t4.dataareaid)
AND (
t3.partition = t4.partition)))
PROD：Microsoft SQL Server 2014 - 12.0.2000.8 (X64) 2014 年 2 月 20 日 20:04:26 版权所有 (c) Microsoft Corporation 企业版：Windows NT 6.3（内部版本 9600：）上的基于内核的许可（64 位）
PROD TEST description
30 0 Blocked process reporting threshold
1 0 Enable or disable Database Mail XPs
1 0 Sets the FILESTREAM access level
1 2 maximum degree of parallelism
230000 22528 Maximum size of server memory (MB)
1 0 Dedicated Admin Connections are allowed from remote clients
测试：Microsoft SQL Server 2014 - 12.0.2000.8 (X64) 2014 年 2 月 20 日 20:04:26 版权所有 (c) Microsoft Corporation Developer Edition（64 位）在 Windows NT 6.1（Build 7601：Service Pack 1）（Hypervisor）上
TraceFlag Status Global Session
1117 1 1 0
1118 1 1 0
1224 1 1 0
2371 1 1 0
2505 1 1 0
3226 1 1 0
4199 1 1 0
兼容性级别：两者均为 120。
生产线
Run Code Online (Sandbox Code Playgroud)SELECT COUNT(*) FROM SPECTRANS -- 4601 SELECT COUNT(*) FROM CUSTTRANSOPEN -- 14162 SELECT COUNT(*) FROM CUSTTRANS -- 137127 SELECT COUNT(*) FROM CUSTTABLE -- 35617 SELECT COUNT(*) FROM VIRTUALDATAAREALIST -- 3 SELECT COUNT(*) FROM DATAAREA -- 5预估执行计划：http : //pastebucket.com/326386
统计 - http://pastebucket.com/326459
测试
Run Code Online (Sandbox Code Playgroud)SELECT COUNT(*) FROM SPECTRANS -- 10753 SELECT COUNT(*) FROM CUSTTRANSOPEN -- 7150 SELECT COUNT(*) FROM CUSTTRANS -- 77342 SELECT COUNT(*) FROM CUSTTABLE -- 36297 SELECT COUNT(*) FROM VIRTUALDATAAREALIST -- 3 SELECT COUNT(*) FROM DATAAREA -- 5实际执行计划：http : //pastebucket.com/326387
统计-http : //pastebucket.com/326458
由于您运行的是 Microsoft SQL Server 2014 - 12.0.2000，这是第一个 RTM 版本，包括新的 Cardinality Estimator，我强烈建议您尝试更新到最新的 CU 之一。
您需要应用 SP1，但还必须启用跟踪标志 4199 才能激活修复程序。
SQL Server 2014 Service Pack 1 对新的 Cardinality Estimator（新 CE）进行了各种修复。发行说明还记录了修复程序。
您已经激活了 TF 4199，因此改进应该会自动激活。
我强烈建议您更新和使用新的 Cardinality Estimator，但要使用所有更新的修复程序，而不是禁用新的 CE alltogheter。
如果您对这个单一查询仍然有问题，您可以添加一个OPTION (QUERYTRACEON 9481)单独针对该查询的计划指南。
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