elasticsearch 排序

1. 查询全部字段，按某个字段排序

GET_search
{
  "query": {
    "match": {"q_title": ""}
  },
  "sort": {"qa_show_time": {"order": "desc"}}
}

2. 查询指定字段，按某个字段排序

GET /my_index_tjjcy_offline_qa_hot_common/my_doc_tjjcy_offline/_search
{
  "_source": "q_title", 
  "query": {
    "match_all": {}
  },
  "sort": {"qa_show_time": {"order": "desc"}}
}