: value? I need the sort such that ascending will have the NULL values first : and descending will have the NULL values last (i.e. sortMissingFirst="false" : and sortMissingLast="false").
You can configure a default="X" attribute on your field such that X is the minimum legal value for your field type (ie: -2147483648 for TrieIntField, -9223372036854775808 for TrieLongField etc...). but then those values will be stored in the docs as well -- in which case you're best bet would be to use 2 fields, one to index/store the 'real' value and one (with the default specified) that is un-indexed/un-stored but uses docValues for sorting. A workarround that would probably be good enough for floats/doubles w/o reindexing would be to sort on the "def()" function using "-(Double.MAX_VALUE)" as the default... sort=def(your_field,-1.7976931348623157E308) asc sort=def(your_field,-1.7976931348623157E308) desc ...i mention this as being a workarround for floats/doubles because the functions are evaluated as doubles (no "casting" or "forced integer context" type support at the moment), so with integer/float fields there would be some loss of precision. -Hoss http://www.lucidworks.com/
