大数据OLAP Kylin3.0RESTful API query查询接口改造

kylin3.0提供了 restful api
query接口
Request Sample

{
"sql":"select * from TEST_KYLIN_FACT",
"offset":0,
"limit":50000,
"acceptPartial":false,
"project":"DEFAULT"
}
Curl Example

curl -X POST -H "Authorization: Basic XXXXXXXXX" -H "Content-Type: application/json" -d '{ "sql":"select count(*) from TEST_KYLIN_FACT", "project":"learn_kylin" }' http://localhost:7070/kylin/api/query
Response Body

columnMetas - Column metadata information of result set.
results - Data set of result.
cube - Cube used for this query.
affectedRowCount - Count of affected row by this sql statement.
isException - Whether this response is an exception.
ExceptionMessage - Message content of the exception.
Duration - Time cost of this query
Partial - Whether the response is a partial result or not. Decided by acceptPartial of request.
Response Sample

{
"columnMetas":[

  {  
     "isNullable":1,
     "displaySize":0,
     "label":"CAL_DT",
     "name":"CAL_DT",
     "schemaName":null,
     "catelogName":null,
     "tableName":null,
     "precision":0,
     "scale":0,
     "columnType":91,
     "columnTypeName":"DATE",
     "readOnly":true,
     "writable":false,
     "caseSensitive":true,
     "searchable":false,
     "currency":false,
     "signed":true,
     "autoIncrement":false,
     "definitelyWritable":false
  },
  {  
     "isNullable":1,
     "displaySize":10,
     "label":"LEAF_CATEG_ID",
     "name":"LEAF_CATEG_ID",
     "schemaName":null,
     "catelogName":null,
     "tableName":null,
     "precision":10,
     "scale":0,
     "columnType":4,
     "columnTypeName":"INTEGER",
     "readOnly":true,
     "writable":false,
     "caseSensitive":true,
     "searchable":false,
     "currency":false,
     "signed":true,
     "autoIncrement":false,
     "definitelyWritable":false
  }

],
"results":[

  [  
     "2013-08-07",
     "32996",
     "15",
     "15",
     "Auction",
     "10000000",
     "49.048952730908745",
     "49.048952730908745",
     "49.048952730908745",
     "1"
  ],
  [  
     "2013-08-07",
     "43398",
     "0",
     "14",
     "ABIN",
     "10000633",
     "85.78317064220418",
     "85.78317064220418",
     "85.78317064220418",
     "1"
  ]

],
"cube":"test_kylin_cube_with_slr_desc",
"affectedRowCount":0,
"isException":false,
"exceptionMessage":null,
"duration":3451,
"partial":false
}
众所周知，这个返回接口返回给开发是非常不友好的，基于业务需求改造成标准的返回接口

原来的
@RequestMapping(value = "/query", method = RequestMethod.POST, produces = {"application/json"})

@ResponseBody
public SQLResponse query(@RequestBody PrepareSqlRequest sqlRequest) {
    return queryService.doQueryWithCache(sqlRequest);
}

改造后：
public SQLResponse query2(@RequestBody PrepareSqlRequest sqlRequest) {

    return queryService2.doQueryWithCache(sqlRequest);
    List<Map> mapList = new ArrayList<Map>();

    SQLResponse response = queryService.doQueryWithCache(sqlRequest);
    List<List<String>> results = response.getResults();
    if (results != null && results.size() > 0) {
        List<SelectedColumnMeta> columnMetas = response.getColumnMetas();
        Map<String, Object> map;
        int size;
        for (List<String> result : results) {
            map = new HashMap<>();
            size = result.size();
            for (int i = 0; i < size; i++) {
                map.put(columnMetas.get(i).getLabel(), result.get(i));
            }
            mapList.add(map);
        }

    }

    return new SQLResponse(mapList, response.getCube(), response.getAffectedRowCount(), response.getIsException(),
            response.getExceptionMessage(), response.isPartial(), response.isPushDown(), response.getDuration(),
            response.getTotalScanCount(), response.getTotalScanBytes(), response.isStorageCacheUsed());
}
1650771882532.jpg![1650771882532.jpg](https://ucc.alicdn.com/pic/developer-ecology/42eec56238d94065a5f22f4dcfd3cbb7.jpg)


改造后返回参数
{
"results": [
    {
        "repay_date": "2021-11-12", 
        "repaid_amt": "61",
        "cert_code": null,
        "bill_no": "ZZD",
        "adv_repay_fee": "0",
        "fund_flag": "2",
        "repay_status": "0
    },
    {
        "repay_date": "2021-05-05", 
        "repaid_amt": "29.7",
        "cert_code": null,
        "bill_no": "xxxxxxx",
        "adv_repay_fee": "0",
        "fund_flag": "2",
        "repay_status": "0"
    }
],
"isException": false,
"exceptionMessage": null,
"duration": 244,
"total": 22

}