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Re: [xsl] Best way to substitute a empty child node to the value 'NULL'


Subject: Re: [xsl] Best way to substitute a empty child node to the value 'NULL'
From: "Colin Adams" <colinpauladams@xxxxxxxxxxxxxx>
Date: Thu, 7 Feb 2008 09:43:34 +0000

Why the use of an xsl:for-each?

On 07/02/2008, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> >    Below is a XSLT 2.0 solution:
>
> That's a possible solution, but I would do it in push style:
>
>      <xsl:stylesheet version="1.0"
>        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>        xmlns:xs="http://www.w3.org/2001/XMLSchema">
>
>      <xsl:output indent="yes" />
>
>      <xsl:template match="/">
>        <xsl:for-each select="data/row">
>          INSERT INTO DBO.TEST
>               (COL1, COL2, COL3, COL4) VALUES(
>               <xsl:value-of separator=",">
>                 <xsl:apply-templates/>
>               </xsl:value-of>
>           );
>        </xsl:for-each>
>      </xsl:template>
>
>      <xsl:template match="row/*">
>        <xsl:sequence select="concat($apos, normalize-space(.), $apos)"/>
>      </xsl:template>
>
>      <xsl:template match="row/*[normalize-space(.) = '']">
>        <xsl:sequence select="'NULL'"/>
>      </xsl:template>
>
>     <xsl:variable name="apos" as="xs:string">'</xsl:variable>
>
>     </xsl:stylesheet>
> >
> >
> > On Feb 7, 2008 10:53 AM, Tariq Ahsan <tariqahsan@xxxxxxxxx> wrote:
> > > Hi,
> > >
> > > I am a newbie to XSLT. I am trying to write a simple xslt script to
> > > transform a xml file with records to a SQL file which will have
> > > separate SQL insert statements. But some of the nodes of this input
> > > xml file will contain empty nodes. I would like to transform all of
> > > the empty nodes to the value of 'NULL'. Here is a sample content of
> > > the input xml file
> > > -
> > >
> > > <data>
> > >    <row>
> > >      <TAG1>123</TAG1>
> > >      <TAG2>ABC</TAG2>
> > >      <TAG3 />
> > >      <TAG4 />
> > >    </row>
> > >    <row>
> > >      <TAG1>999</TAG1>
> > >      <TAG2>XYZ</TAG2>
> > >      <TAG3 />
> > >      <TAG4 />
> > >    </row>
> > >
> > > </data>
> > >
> > > Here's the what I have now in the xsl file -
> > >
> > > <?xml version="1.0" encoding="utf-8"?>
> > >
> > > <xsl:stylesheet version="1.0"
> > >    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> > >        <xsl:output indent="yes" />
> > >
> > > <xsl:template match="/">
> > > <xsl:for-each select="data/row">
> > > INSERT INTO DBO.TEST
> > > (COL1, COL2, COL3, COL4) VALUES(
> > > <xsl:value-of select="normalize-space(TAG1)"/>, '<xsl:value-of
> > > select="normalize-space(TAG2)"/>',
> > > '<xsl:value-of select="normalize-space(TAG3)"/>',
> > > <xsl:value-of select="normalize-space(TAG4)"/>, ); </xsl:for-each>
> > > </xsl:template> </xsl:stylesheet>
> > >
> > > Here's the output sql file should have
> > >
> > > insert into DBO.TEST (COL1, COL2, COL3, COL4) VALUES (123, 'ABC',
> > > NULL, NULL); insert into DBO.TEST (COL1, COL2, COL3, COL4) VALUES
> > > (999, 'XYZ', NULL, NULL);
> > >
> > > Would appreciate if I could get a simple solution for this problem.
> > >
> > > Thanks
> > >
> > > Tariq Ahsan
> >
> >
> >
> > --
> > Regards,
> > Mukul Gandhi


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