AWS Athena：如何处理来自 GetQueryResultsCommand 命令的数据

Question

After retrieving an Athena query result (stored in a CSV file in a S3 bucket) by using the Athena client and the command GetQueryResultsCommand , the data retrieved are structured in the following way:

{
   "NextToken": "string",
   "ResultSet": { 
      "ResultSetMetadata": { 
         "ColumnInfo": [ 
            { 
               "CaseSensitive": boolean,
               "CatalogName": "string",
               "Label": "string",
               "Name": "string",
               "Nullable": "string",
               "Precision": number,
               "Scale": number,
               "SchemaName": "string",
               "TableName": "string",
               "Type": "string"
            }
         ]
      },
      "Rows": [ 
         { 
            Data: [
              { VarCharValue: 'columnName1' },
              { VarCharValue: 'columnName2' },
              { VarCharValue: 'columnName3' },
              { VarCharValue: 'columnName4' },
              { VarCharValue: 'columnName5' },
              { VarCharValue: 'columnName6' }
            ]
          },
          {
            Data: [
              { VarCharValue: 'fieldValue1' },
              { VarCharValue:  123.4 },
              { VarCharValue:  false },
              { VarCharValue:  12 },
              { VarCharValue: 'fieldValue5' },
              { VarCharValue:  231.1 }
            ]
          }
      ]
   },
   "UpdateCount": number
}

where at ColumnInfo there are all the information about the columns present in the CSV (name, type information etc) and in the Row array are present all the information about the row: the columns and the related values splitted in two Data objects

My question is: is it possible to get the data from QueryResultCommand (or another command) with a better structure where the 2 Data objects are already "merged" so it easier to manage the rows and get their values by column name?

Or, do I have to handle every single element in the ROW array and create my own object?

Answer 1

Checking the documentation for the Athena SDK,we see that it does not support different formats for the returned data. I have pasted the available parameters below. The only other way I see would be to use the CLI which has an option to return the data in a different format.

Parameters:

params (Object) (defaults to: {}) —
QueryExecutionId — (String)
The unique ID of the query execution.

NextToken — (String)
A token generated by the Athena service that specifies where to continue pagination if a previous request was truncated. To obtain the next set of pages, pass in the NextToken from the response object of the previous page call.

MaxResults — (Integer)
The maximum number of results (rows) to return in this request.