定位不合法的查询的api： _validate

    1. GET /book/_search?explain
    2. {
    3.   "query": {
    4.     "match1": {
    5.       "name": "test"
    6.     }
    7.   }
    8. }
    10. # validate后面要配合query 和explain连用
    11. GET /book/_validate/query?explain
    12. {
    13.   "query": {
    14.     "match1": {
    15.       "name": "test"
    16.     }
    17.   }
    18. }