Question

In the following code this statement;

declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd

is repeated 6 times making the code really messy and harder to follow:

SELECT XW_PK, xw_ExeVersion, xw_enterpriseCode, xw_DatabaseCode, xw_CompanyCode,
    Poodle.Love.value('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
    (pd:action/@name)[1]', 'varchar(100)') Name,
    Poodle.Love.value('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
    (pd:action/@started)[1]', 'varchar(100)') [Started],
    Poodle.Love.value('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
    (pd:action/@ended)[1]', 'varchar(100)') [Ended],
    Poodle.Love.value('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
    (pd:action/@Elapsed)[1]', 'varchar(100)') Elapsed,
    Poodle.Love.value('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
    (pd:action/@elapsedWithChildren)[1]', 'varchar(100)') elapsedWithChildren
    FROM   stmusage
        CROSS APPLY xw_rawData.nodes('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
        /pd:performanceMeasurement/pd:action') as Poodle(Love)

What I want to do is declare the namespace just once and be done with it. The problem is that each of the xqueries are embedded in a string – and I’m not completely sure – but the experiece I’ve picked up over the years gives me the overwhelming impression that these strings aren’t going to be interacting with each other any time soon.

Answer 1

SELECT 
            XMLTable.actions.value('(@name)', 'varchar(100)') Name,
            XMLTable.actions.value('(@started)', 'datetime') [Started],
            XMLTable.actions.value('(@started)', 'datetime') + 
            convert(float, replace (replace (XMLTable.actions.value('(@elapsedWithChildren)', 'varchar(100)'),'PT',''),'S','')) / (60 * 60 * 24) Ended, --dodgy floating point rounding errors
            convert(float, replace (replace (XMLTable.actions.value('(@elapsed)', 'varchar(100)'),'PT',''),'S','')) Elapsed,
            convert(float, replace (replace (XMLTable.actions.value('(@elapsedWithChildren)', 'varchar(100)'),'PT',''),'S','')) ElapsedWithChildren,
            XMLTable.actions.value('@moduleId','varchar(100)') moduleid,
            XMLTable.actions.value('@actionCount','int') actionCount,
            XW_PK, XW_ExeVersion, XW_EnterpriseCode, XW_DatabaseCode, XW_CompanyCode, ExportType
            FROM StmUsage
                CROSS APPLY xw_rawData.nodes('declare namespace pd="http://cargowise.com/ediEnterprise/2011/10/11/systemUsage.xsd";
                /pd:performanceMeasurement/pd:action') XMLTable(actions)
            cross join (select 'Elapsed' ExportType union select 'ElapsedWithChildren') ExportTypeAlias

Easy as!