Hi Avenka,
you asked for a HowTo to add a field "inverseID" which allows to calculate
max(id) from its first term:
If you do not use solr you have to calculate "100000000 - id" and store it in
an extra field "inverseID".
If you fill solr with your own code, add a TrieLongField "inverseID" and fill
with the value "-id".
If you only want to change schema.xml (and add some classes):
* You need a new FieldType "inverseLongType" and a Field "inverseID" of Type
"inverseLongType"
* You need a line <copyField source="id" dest="inverseID"/>
(see http://wiki.apache.org/solr/SchemaXml#Copy_Fields)
For inverseLongType I see two possibilities
a) use TextField and make your own filter to calculate "100000000 - id"
b) extends TrieLongField to a new FieldType "InverseTrieLongField" with:
@Override
public String readableToIndexed(String val) {
return super.readableToIndexed(Long.toString( -Long.parseLong(val)));
}
@Override
public Fieldable createField(SchemaField field, String externalVal, float
boost) {
return super.createField(field,Long.toString( -Long.parseLong(val)), boost
);
}
@Override
public Object toObject(Fieldable f) {
Object result = super.toObject(f);
if(result instanceof Long){
return new Long( -((Long)result).longValue());
}
return result;
}
Beste regards
Karsten
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-------- Original-Nachricht --------
> Datum: Wed, 11 Jul 2012 20:59:10 -0700 (PDT)
> Von: avenka <ave...@gmail.com>
> An: solr-user@lucene.apache.org
> Betreff: Re: DataImport using last_indexed_id or getting max(id) quickly
> Thanks. Can you explain more the first TermsComponent option to obtain
> max(id)? Do I have to modify schema.xml to add a new field? How exactly do
> I
> query for the lowest value of "100000000 - id"?
>
> --
> View this message in context:
> http://lucene.472066.n3.nabble.com/DataImport-using-last-indexed-id-or-getting-max-id-quickly-tp3993763p3994560.html
> Sent from the Solr - User mailing list archive at Nabble.com.
