> Theoretically yes,it's correct, but i > have about 1/10 of the docs with > this field not empty and the rest is empty. > > Most of the articles have the field empty as I can see when > query *:*.
How are you adding documents to solr? xml update, DIH?
Probably you are adding whitespace value to that field.
When you query q=*:*&fl=fieldX what do you see?
Do you see
<doc>
<str name="fieldX"></str>
</doc>
or
<doc>
</doc>
