: > field:"value" OR (*:* AND NOT field:[* TO *]) : Instead of field:[* TO *], you can define a default value in schema.xml. : Or DefaultValueUpdateProcessorFactory in solrconfig.
right -- the most efficient way to query for this kind of "has value in fieldX" or "does not have a value in fieldX" is to index that specific piece of information in an easily querable way. either using a default value, or with a new boolean field "has_fieldX" that you can then query on -Hoss
