Thanks guys ...
This link is also useful:
query-string-with-range
The query should be like this:
GET /_search
{
"_source": [
"file.*"
],
"query": {
"bool": {
"must": [
{
"query_string": {
"query": "all"
}
},
{
"range": {
"file.filesize": {
"gte": 900,
"lte": 100000
}
}
}
]
}
},
"sort": {
"_score": {
"order": "desc"
}
}
}