Ah yeah, I didn't try out the match-query, thank you very much! I just made a little twist and use the "multi_match" query because I need to enter multiple fields with wildcard in the fieldname, a simple example:
GET /_search
{
"query": {
"multi_match" : {
"query": "basket of apples",
"fields": [ "tex*.keyword"]
}
}
}
Works like a charm!