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

Why the use of an xsl:for-each?

On 07/02/2008, Michael Kay <mike(_at_)saxonica(_dot_)com> 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(_at_)yahoo(_dot_)com> 
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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