Re: Is there a SubstringTransformer?

[Gora Mohanty]

On Tue, 24 Aug 2010 08:46:52 +0200
Gonzalo Payo Navarro <gpa...@gmail.com> wrote:

> Hi everyone!
> 
> I need to get the first 100 chars of a string-type field, but I
> am not able to find something like a SubstringTransformer,
> therefore I am using the RegexTransformer, but I suspect that it
> eats a lot of time on indexation time.
> 
> So, in short, I need something like a SubstringTransformer: Is
> there something like that?
[...]

Not sure of the efficiency vis-a-vis RegexTransformer, but take
a look at ScriptTransformer:
http://wiki.apache.org/solr/DataImportHandler#ScriptTransformer

Something along the lines of:
<dataConfig>
        <script><![CDATA[
                function first100(row) {
                   var in = row.get( "myfield" );
                   row.put( "myfield", in.substr( 0, 100 ) );
                   return row;
                }
        ]]></script>
        <document>
                <entity name="e" pk="id"
transformer="script:first100" query="select * from X"> ....
                </entity>
        </document>
</dataConfig>

should do the job.

Regards,
Gora