从2008年到2014年迁移多维数据集时，我们遇到了一个多维数据集处理失败的消息＆＃34; Query Timeout Expired：HYT00＆＃34;。我查看了错误信息，发现某个查询执行了一个多小时，导致了问题。查询是，
SELECT [dbo_IndicatorFact].[PY] AS [dbo_IndicatorFactPY0_0],[dbo_IndicatorFact].[BP] AS [dbo_IndicatorFactBP0_1],[dbo_IndicatorFact].[RE] AS [dbo_IndicatorFactRE0_2],[dbo_IndicatorFact].[UCPY] AS [dbo_IndicatorFactUCPY0_3],[dbo_IndicatorFact].[UCBP] AS [dbo_IndicatorFactUCBP0_4],[dbo_IndicatorFact].[UCRE] AS [dbo_IndicatorFactUCRE0_5],[dbo_IndicatorFact].[GRPY] AS [dbo_IndicatorFactGRPY0_6],[dbo_IndicatorFact].[GRBP] AS [dbo_IndicatorFactGRBP0_7],[dbo_IndicatorFact].[GRRE] AS [dbo_IndicatorFactGRRE0_8],[dbo_IndicatorFact].[NRPY] AS [dbo_IndicatorFactNRPY0_9],[dbo_IndicatorFact].[NRBP] AS [dbo_IndicatorFactNRBP0_10],[dbo_IndicatorFact].[NRRE] AS [dbo_IndicatorFactNRRE0_11],[dbo_IndicatorFact].[GRC2] AS [dbo_IndicatorFactGRC20_12],[dbo_IndicatorFact].[AnalysisCategoryId] AS [dbo_IndicatorFactAnalysisCategoryId0_13],[dbo_IndicatorFact].[IndicatorTypeId] AS [dbo_IndicatorFactIndicatorTypeId0_14],[dbo_IndicatorFact].[IndicatorNameId] AS [dbo_IndicatorFactIndicatorNameId0_15],[dbo_IndicatorFact].[CategoryId] AS [dbo_IndicatorFactCategoryId0_16],[dbo_IndicatorFact].[CountryId] AS [dbo_IndicatorFactCountryId0_17],[dbo_IndicatorFact].[FiscalQuarterId] AS [dbo_IndicatorFactFiscalQuarterId0_18]
FROM
(
SELECT vwIndicatorFact.IndicatorId AS Id,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE vwIndicatorFact.PY END END AS PY,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE vwIndicatorFact.BP END END AS BP,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN vwIndicatorFact.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE vwIndicatorFact.RE END END AS RE,
vwIndicatorFact.BPvsPY, vwIndicatorFact.BPvsPYpercent, vwIndicatorFact.REvsBP, vwIndicatorFact.REvsBPpercent, vwIndicatorFact.REvsPY,
vwIndicatorFact.REvsPYpercent,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.PY END ELSE CASE IndicatorFact_GRC2.PY
WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.PY END END END AS UCPY,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.BP END ELSE CASE IndicatorFact_GRC2.BP
WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.BP END END END AS UCBP,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.RE END ELSE CASE IndicatorFact_GRC2.RE
WHEN 0 THEN 0 ELSE CASE vwIndicatorFact.IndicatorNameId WHEN 1 THEN 1000000 ELSE IndicatorFact_UC.RE END END END AS UCRE, vwIndicatorFact.IndicatorNameId,
vwIndicatorFact.CategoryId, vwIndicatorFact.AnalysisCategoryId, vwIndicatorFact.CountryId, vwIndicatorFact.FiscalQuarterId, vwIndicatorFact.IndicatorTypeId,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE IndicatorFact_GR.PY END END AS GRPY,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE IndicatorFact_GR.BP END END AS GRBP,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_GR.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE IndicatorFact_GR.RE END END AS GRRE,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.PY ELSE CASE IndicatorFact_GRC2.PY WHEN 0 THEN 0 ELSE IndicatorFact_NR.PY END END AS NRPY,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.BP ELSE CASE IndicatorFact_GRC2.BP WHEN 0 THEN 0 ELSE IndicatorFact_NR.BP END END AS NRBP,
CASE vwIndicatorFact.IndicatorTypeId WHEN 1 THEN IndicatorFact_NR.RE ELSE CASE IndicatorFact_GRC2.RE WHEN 0 THEN 0 ELSE IndicatorFact_NR.RE END END AS NRRE,
IndicatorFact_GRC2.BP AS GRC2
FROM
dbo.vwIndicatorFact INNER JOIN
dbo.vwIndicatorFact AS IndicatorFact_UC ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_UC.IndicatorTypeId AND
vwIndicatorFact.FiscalQuarterId = IndicatorFact_UC.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_UC.CountryId AND
vwIndicatorFact.CategoryId = IndicatorFact_UC.CategoryId AND IndicatorFact_UC.IndicatorNameId = 1 LEFT OUTER JOIN
dbo.vwIndicatorFact AS IndicatorFact_GR ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_GR.IndicatorTypeId AND
vwIndicatorFact.FiscalQuarterId = IndicatorFact_GR.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_GR.CountryId AND
vwIndicatorFact.CategoryId = IndicatorFact_GR.CategoryId AND IndicatorFact_GR.IndicatorNameId = 3 AND
IndicatorFact_GR.AnalysisCategoryId = vwIndicatorFact.AnalysisCategoryId LEFT OUTER JOIN
dbo.vwIndicatorFact AS IndicatorFact_NR ON vwIndicatorFact.IndicatorTypeId = IndicatorFact_NR.IndicatorTypeId AND
vwIndicatorFact.FiscalQuarterId = IndicatorFact_NR.FiscalQuarterId AND vwIndicatorFact.CountryId = IndicatorFact_NR.CountryId AND
vwIndicatorFact.CategoryId = IndicatorFact_NR.CategoryId AND IndicatorFact_NR.IndicatorNameId = 5 AND
IndicatorFact_NR.AnalysisCategoryId = vwIndicatorFact.AnalysisCategoryId LEFT OUTER JOIN
dbo.vwIndicatorFact AS IndicatorFact_GRC2 ON IndicatorFact_GRC2.IndicatorTypeId = 2 AND vwIndicatorFact.FiscalQuarterId = IndicatorFact_GRC2.FiscalQuarterId AND
vwIndicatorFact.CountryId = IndicatorFact_GRC2.CountryId AND vwIndicatorFact.CategoryId = IndicatorFact_GRC2.CategoryId AND
IndicatorFact_GRC2.IndicatorNameId = 3 AND IndicatorFact_GRC2.AnalysisCategoryId = 2
)
AS [dbo_IndicatorFact]
这基本上是包含300k记录的特定视图上的多个自联接。我们的dba更新了所有索引并更新了统计信息，但我们仍然无法快速执行此查询。如果此查询执行得更快，则多维数据集可能会更快地处理。视图中的数据也没有不一致。需要一些关于这里可能存在的问题的建议。
关于此的一些背景知识 - 这是我们正在开展的迁移项目的一部分。旧的开发环境能够在大约20秒内执行相同的查询，并且视图中的记录数量相似。新的开发人员将永远使用相同的视图执行相同的查询。
答案 0 :(得分：2)
在你的陈述中，它可以是任何东西：糟糕的索引，过时的统计数据，错误的陈述，巨大的数据......
我有类似的问题，我在SSAS中增加了外部命令超时（默认为1小时）。如果您无法优化查询，请在此处查看如何执行此操作：
http://www.msbiguide.com/2013/01/how-to-increase-externalcommandtimeout-in-ssas/