I don't think that lt is mandatory. Just try to omit it !
HTH
David 
Twitter : @dadoonet / @elasticsearchfr
Le 1 mai 2012 à 18:20, Nitish Sharma sharmanitishdutt@gmail.com a écrit :
Hi,
Are there any wildcards available for (numeric) range queries in ES? In particular, I am looking to run range queries like - {"lt":"*", "gte":"2012-04-30"}.Cheers
Nitish