在 SQL 服务器中的另一个 XQuery value() 查询中使用 XQuery value() 查询的结果

Question

我正在尝试查询 xml 格式的 SSRS .rdl 文件。以下是 xml:

相关部分的示例

<Report xmlns="http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition">
  <DataSources>
    <DataSource Name="DataSource1">
      <DataSourceReference>DataSourceReference1</DataSourceReference>
    </DataSource>
    <DataSource Name="DataSource2">
      <DataSourceReference>DataSourceReference2</DataSourceReference>
    </DataSource>
  </DataSources>
  <DataSets>
    <DataSet Name="DataSet1">
      <Query>
        <DataSourceName>DataSource1</DataSourceName>
        <CommandText>SELECT a from b</CommandText>
      </Query>
    </DataSet>
    <DataSet Name="DataSet2">
      <Query>
        <DataSourceName>DataSource2</DataSourceName>
        <CommandText>SELECT c from d</CommandText>
      </Query>
    </DataSet>
  </DataSets>
...

这是我目前的 SQL 查询：

IF OBJECT_ID('tempdb..#catalogtemp') IS NOT NULL DROP TABLE #catalogtemp 
GO

SELECT Path, CONVERT(XML, CONVERT(VARBINARY(MAX), Content)) XmlColumn
INTO #catalogtemp
FROM Catalog WHERE Type=2;

;WITH XMLNAMESPACES ('http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition' as rdl10)

SELECT Path as ReportPath,
T1.dataset.value('./@Name','nvarchar(max)') DatasetName,
T1.dataset.value('(.//rdl10:CommandText)[1]','nvarchar(max)') as DatasetQuery,
T1.dataset.value('(.//rdl10:DataSourceName)[1]','nvarchar(max)') as DataSourceName
FROM #catalogtemp
CROSS APPLY xmlColumn.nodes('//rdl10:DataSet') T1(dataset)

对于上面的示例 xml，这将 return:

ReportPath        DatasetName   DatasetQuery      DataSourceName
/path/to/report   DataSet1      SELECT a from b   DataSource1
/path/to/report   DataSet2      SELECT c from d   DataSource2

我想要做的是添加另一列来查找 DataSource 节点的 DataSourceReference 值，其 Name 属性与节点的 DataSourceName 值相匹配DataSet。所以查询的结果将如下所示：

ReportPath        DatasetName   DatasetQuery      DataSourceName   DataSourceReference
/path/to/report   DataSet1      SELECT a from b   DataSource1      DataSourceReference1
/path/to/report   DataSet2      SELECT c from d   DataSource2      DataSourceReference2

我知道以下 XQuery 将 return DataSource 节点的 DataSourceReference 值 Name 属性为 'DataSource1':

T1.dataset.value('(../..//rdl10:DataSource[@Name="DataSource1"]//rdl10:DataSourceReference)[1]','nvarchar(max)')

但是如何编写查询以每次查找正确的 DataSourceName？

Answer 1

恕我直言，因为 <DataSources> 不包含在 <DataSets> 标签内，反之亦然，您需要一个子查询：

;WITH XMLNAMESPACES ('http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition' as rdl10)

SELECT ct.Path as ReportPath,
       T1.dataset.value('./@Name','nvarchar(max)') DatasetName,
       T1.dataset.value('(.//rdl10:CommandText)[1]','nvarchar(max)') as DatasetQuery,
       T1.dataset.value('(.//rdl10:DataSourceName)[1]','nvarchar(max)') as DataSourceName
       ,t.DSR
FROM catalogtemp ct
CROSS APPLY xmlColumn.nodes('//rdl10:DataSet') T1(dataset)
JOIN (SELECT Path,
             T2.dsrc.value('(./@Name)[1]', 'nvarchar(max)') as DSName,
             T2.dsrc.value('(.//rdl10:DataSourceReference)[1]', 'nvarchar(max)') as DSR
      FROM   catalogtemp
      CROSS APPLY xmlColumn.nodes('//rdl10:DataSource') T2(dsrc)) t
ON    t.Path = ct.Path
AND   t.DSName = T1.dataset.value('(.//rdl10:DataSourceName)[1]','nvarchar(max)')
WHERE ct.Path = 'my report'
GO

ReportPath | DatasetName | DatasetQuery    | DataSourceName | DSR                 
:--------- | :---------- | :-------------- | :------------- | :-------------------
my report  | DataSet1    | SELECT a from b | DataSource1    | DataSourceReference1
my report  | DataSet2    | SELECT c from d | DataSource2    | DataSourceReference2

dbfiddle here

在 SQL 服务器中的另一个 XQuery value() 查询中使用 XQuery value() 查询的结果

Use the result of an XQuery value() query in another XQuery value() query in SQL Server

sql-server

reporting-services

xquery

sql-server-2014

xquery-sql