TSQL Split XML attributes

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TSQL Split XML attributes

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pricejt

Posted Sunday, November 18, 2012 8:41 PM

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Last Login: Thursday, December 20, 2012 7:03 AM
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I have an xml string and need to manipulate it within sql.

<RuleData ReturnVariable="">
  <MateProperties>
    <Property Key="value" DisplayName="name value" />
    <Property Key="value2" DisplayName="name value2" />
  </MateProperties>
  <ReferenceNames>
    <Item Name="0" Value="=CouplerType + "-1"" />
    <Item Name="1" Value="Driveshaft-1" />
  </ReferenceNames>
  <ReferenceFeatures>
    <Item Name="=CouplerType + "-1"" Value="CSYS_BOREB" />
    <Item Name="Driveshaft-1" Value="CSYS_CouplerINSIDE" />
  </ReferenceFeatures>
</RuleData>

These two lines I need to convert them.

<Item Name="=CouplerType + "-1"" Value="CSYS_BOREB" />
<Item Name="Driveshaft-1" Value="CSYS_CouplerINSIDE" />

To This new format.

<Value> 
<Column Value="=CouplerType + "-1"" /> 
<Column Value="CSYS_BOREB" /> 
</Value> 
<Value> 
<Column Value="Driveshaft-1" /> 
<Column Value="CSYS_CouplerINSIDE" /> 
</Value>

Essentially each line has to be split in two and re-named. I Can take care of the re-naming i just am having trouble splitting the columns. I have to do exactly the same thing in the ReferenceNames Section as well. That one is easier as Its always "0" and "1" so i can simply convert the xml to string and find replace with that. The ReferenceFeatures section though is more complicated because anything can be in the name section.

Any help would be appreciated.

Thanks

Post #1386137

dwain.c

Posted Sunday, November 18, 2012 10:02 PM

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Group: General Forum Members
Last Login: Today @ 11:14 PM
Points: 2,344, Visits: 3,187

To start with, the XML you provided won't parse:

DECLARE @XML XML = '
    <RuleData ReturnVariable="">
      <MateProperties>
        <Property Key="value" DisplayName="name value" />
        <Property Key="value2" DisplayName="name value2" />
      </MateProperties>
      <ReferenceNames>
        <Item Name="0" Value="=CouplerType + "-1"" />
        <Item Name="1" Value="Driveshaft-1" />
      </ReferenceNames>
      <ReferenceFeatures>
        <Item Name="=CouplerType + "-1"" Value="CSYS_BOREB" />
        <Item Name="Driveshaft-1" Value="CSYS_CouplerINSIDE" />
      </ReferenceFeatures>
    </RuleData>'

SELECT @XML

Gets this error message:

Msg 9410, Level 16, State 1, Line 1
XML parsing: line 8, character 43, whitespace expected

In order to use the modify method in SQL, the XML must be parseable. Otherwise you'll need to resort to doing the replace as a string operation.

No loops! No CURSORs! No RBAR! Hoo-uh!

INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?

Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Are you too recursively challenged?
Splitting strings based on patterns can be fast!

Post #1386145

Eugene Elutin

Posted Monday, November 19, 2012 3:03 AM

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Group: General Forum Members
Last Login: Today @ 11:22 AM
Points: 2,541, Visits: 4,370

pricejt (11/18/2012)

I have an xml string and need to manipulate it within sql.
...

T-SQL is not the language for XML manipulation. It can parse it and it can create it, but not transform it.
This task is for XSLT.
If you still want to do so in T-SQL you have two choices:
1. Parse it into table then create a new one (stupid option)
or
2. Create CLR function which will consume your XML, relevant XSLT and apply it (preferred option)

_____________________________________________
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How to post your question to get the best and quick help

Post #1386255

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