: I'm not sure if this is possible or not, but, is there a way to do a : search and reject fields that are empty or have null values like the : pseudo code below?
As an inverted index, the Lucene index Solr uses doesn't know when documents have an "empty" value ... it stores the inverted mapping of value=>documents, so there is no way to query for field_b:NULL, let alone "NOT field_b:bull" you can however query forthings like: field_b:[* TO *] which requres field_b to have some value (that seems to be the use case you are after) as a general rule, if you really want to be abel to support searches for rhings like "find all docs wher there is no value in field X" the easiest way to achieve something like that in Solr is to configure the field with a default value in the schema ... something that would never normally appear in your data (a placeholder for 'null' so to speak) and query on that. -Hoss
