使用 WITH XMLNAMESPACES 的 SSRS 查询不返回数据集

Question

我为 SSRS 报告编写的 sql 查询在 SSMS 中完美执行，但在 SSRS 报告中运行时无法 return 结果。报表服务器或数据库服务器上没有错误。 SSRS 报告呈现但不包含任何数据。我尝试了运行ning SQL 探查器，但查询根本没有出现。我在服务器上还有其他几个报告运行正确并且查询出现在 SQL 分析器中。损坏报告中唯一不同的是我正在使用 ;WITH XMLNAMESPACES(DEFAULT 'urn:hl7-org:v3')

查询 XML 数据

我在运行ning 与 SQL Server 2005 和 2008

上得到了相同的结果

这是查询，关于为什么在 SSRS 中运行时没有 returned 的任何想法。我已将查询修改为 remove/modified 客户端信息，这可能会导致语法错误，但未修改的查询运行s 和 returns 结果是运行在 SSMS

Declare @MinDate datetime;
Declare @MaxDate datetime;
DECLARE @fooData TABLE (msgId varchar(100), TransactionName     varchar(30),SourceSystem varchar(12),MsgDay date) 

;WITH XMLNAMESPACES(DEFAULT 'urn:hl7-org:v3')

INSERT INTO @fooData
SELECT 
       MsgLogID as msgId
      ,TransactionName =
            CASE LEFT(MsgBody,28)
                    --WHEN '<qqqResult' THEN 'qqqResult'
                    WHEN '<qqqResult xmlns=' THEN 'qqqResult'
                    ELSE 'qqqqRevised'
                    END
    , SourceSystem =
            CASE LEFT(MsgBody,21)
                    --WHEN '<qqqResult' THEN CONVERT(XML,[MsgBody]).value('(/qqqResult/receiver/device/id/@extension)[1]','varchar(1000)')
                    WHEN '<qqqResult' THEN CONVERT(XML,[MsgBody]).value('(/qqqResult/sender/device/id/@extension)[1]','varchar(1000)')
                    ELSE CONVERT(XML,[MsgBody]).value('(/qqqRevised/sender/device/id/@extension)[1]','varchar(1000)')
                    END
     , Convert(date,[MsgDateTime]) as MsgDay

  FROM [foo].[dbo].[fooMegerPerson_WCF]


  WHERE [TransactionStatus] = 'Valid'

SELECT @MaxDate=DATEADD(DAY,0,datediff(day,0, MAX([MsgDateTime]))) ,@MinDate=DATEADD(DAY,0,datediff(day,0, MIN ([MsgDateTime])) )FROM [foo].[dbo].[fooMegerPerson_WCF]

-- Declare a temp table for the query msg type so that we can create a join
DECLARE @msgNameTable TABLE (msgName varchar(30))
INSERT INTO @msgNameTable (msgName)
Values ('qqqResult'),('fooRevised')

DECLARE @sourceTable TABLE (sourceName varchar(10))
INSERT INTO @sourceTable (sourceName)
Values ('foo_1'),('foo_2') 
--Select * from @msgNameTable
-- create a date table containing every day between start and end
DECLARE @datetable TABLE (d date) 
INSERT INTO @datetable
SELECT     TOP (DATEDIFF(DAY, @MinDate, @MaxDate) + 1) Date = DATEADD(DAY, ROW_NUMBER() OVER (ORDER BY a.object_id) - 1, 
@MinDate)
FROM         sys.all_objects a CROSS JOIN
                      sys.all_objects b

-- cross join to create a daily entry for every msg type and every source system                      
DECLARE @dateNameSourceTable  TABLE (d date, msgName varchar (30),sourceName varchar(10)) 
INSERT INTO @dateNameSourceTable                     
                    Select dt.d, mn.msgName, st.sourceName from @datetable dt CROSS JOIN @msgNameTable mn CROSS JOIN @sourceTable st
--SELECT * FROM @dateNameSourceTable



Select Count(x.msgId) AS MessageCount,dsn.msgName AS TransactionName ,dsn.d, dsn.sourceName 
FROM @fooData   as X
  RIGHT JOIN @dateNameSourceTable dsn ON x.MsgDay = dsn.d  AND x.SourceSystem = dsn.sourceName  AND x.TransactionName = dsn.msgName
   Group By dsn.d, dsn.msgName, dsn.sourceName
  Order By dsn.d, dsn.sourceName , dsn.msgName

Answer 1

The only thing that is different in the broken report is that I am querying XML data using ;WITH XMLNAMESPACES(DEFAULT 'urn:hl7-org:v3')

嗯，这是非常重要的唯一的事情...

DECLARE @XML XML=
'<root><a>test</a></root>';

SELECT @XML.value('(/root/a)[1]','nvarchar(max)')

returns "test" 符合预期

WITH XMLNAMESPACES(DEFAULT 'tmpUri')
SELECT @XML.value('(/root/a)[1]','nvarchar(max)')

returns "NULL"

同时

DECLARE @XML XML=
'<root xmlns="tmpUri"><a>test</a></root>';

WITH XMLNAMESPACES(DEFAULT 'tmpUri')
SELECT @XML.value('(/root/a)[1]','nvarchar(max)')

returns "test" 但是没有命名空间提示的情况会 return "NULL"...

省略所有命名空间的通用技巧是：使用通配符！

SELECT @XML.value('(/*:root/*:a)[1]','nvarchar(max)')

使用 WITH XMLNAMESPACES 的 SSRS 查询不返回数据集

SSRS query using WITH XMLNAMESPACES not returning dataset

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