title: changing quicksight [spice] data field type of CSV(from s3) imported using boto3
body: <p>I am trying to change the field type, it says only string is allowed for S3 how to change that?</p>
  <pre><code>response = client.update_data_set(
      AwsAccountId='AwsAccountId',
      DataSetId='DataSetId',
      Name='Name',
      PhysicalTableMap={
          'string': {
              'S3Source': {
                      'DataSourceArn': 'arn:aws:quicksight:us-east-1:AwsAccountId:datasource/DataSourceId',
                      'UploadSettings': {
                          'Format': 'CSV',
                          'StartFromRow': 1,
                          'ContainsHeader': True,
                          'Delimiter': ','
                      },
                      'InputColumns': [
                          {
                              'Name': 'col1',
                              'Type': 'DATETIME'
                          },
                          {
                              'Name': 'col2',
                              'Type': 'STRING'
                          },
                          {
                              'Name': 'col3',
                              'Type': 'DECIMAL'
                          },
                          {
                              'Name': 'col5',
                              'Type': 'STRING'
                          },
                          {
                              'Name': 'col6',
                              'Type': 'DECIMAL'
                          }
                      ]
                  }
          }
      },
      ImportMode='SPICE')
  </code></pre>
  <p>and this is the error it shows</p>
  <pre><code>InvalidParameterValueException: An error occurred (InvalidParameterValueException) when calling the CreateDataSet operation: Input column col1 in physical table string has invalid type. Allowed types for S3 physical table are [String]
  </code></pre>
  <p>how can I create a table using csv from s3 and have data type other than string? Please help....
  Thanks in Advance</p>