GetStatementResult 搭配 AWS SDK 使用

    /// <summary>
    /// Get the results of a statement execution.
    /// </summary>
    /// <param name="statementId">The statement ID.</param>
    /// <returns>A list of result rows.</returns>
    public async Task<List<List<Field>>> GetStatementResultAsync(string statementId)
    {
        try
        {
            var request = new GetStatementResultRequest
            {
                Id = statementId
            };

            var response = await _redshiftDataClient.GetStatementResultAsync(request);
            return response.Records;
        }
        catch (Amazon.RedshiftDataAPIService.Model.ResourceNotFoundException ex)
        {
            Console.WriteLine($"Statement not found: {ex.Message}");
            throw;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Couldn't get statement result. Here's why: {ex.Message}");
            throw;
        }
    }

檢查陳述式結果。

    /**
     * Asynchronously retrieves the results of a statement execution.
     *
     * @param statementId the ID of the statement for which to retrieve the results
     * @return a {@link CompletableFuture} that completes when the statement result has been processed
     */
    public CompletableFuture<Void> getResultsAsync(String statementId) {
        GetStatementResultRequest resultRequest = GetStatementResultRequest.builder()
            .id(statementId)
            .build();

        return getAsyncDataClient().getStatementResult(resultRequest)
            .handle((response, exception) -> {
                if (exception != null) {
                    logger.info("Error getting statement result {} ", exception.getMessage());
                    throw new RuntimeException("Error getting statement result: " + exception.getMessage(), exception);
                }

                // Extract and print the field values using streams if the response is valid.
                response.records().stream()
                    .flatMap(List::stream)
                    .map(Field::stringValue)
                    .filter(value -> value != null)
                    .forEach(value -> System.out.println("The Movie title field is " + value));

                return response;
            }).thenAccept(response -> {
                // Optionally add more logic here if needed after handling the response
            });
    }

class RedshiftDataWrapper:
    """Encapsulates Amazon Redshift data."""

    def __init__(self, client):
        """
        :param client: A Boto3 RedshiftDataWrapper client.
        """
        self.client = client


    def get_statement_result(self, statement_id):
        """
        Gets the result of a SQL statement.

        :param statement_id: The SQL statement identifier.
        :return: The SQL statement result.
        """
        try:
            result = {
                "Records": [],
            }
            paginator = self.client.get_paginator("get_statement_result")
            for page in paginator.paginate(Id=statement_id):
                if "ColumnMetadata" not in result:
                    result["ColumnMetadata"] = page["ColumnMetadata"]
                result["Records"].extend(page["Records"])
            return result
        except ClientError as err:
            logging.error(
                "Couldn't get statement result. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise

下列程式碼會執行個體化 RedshiftDataWrapper 物件。

    client = boto3.client("redshift-data")
    redshift_data_wrapper = RedshiftDataWrapper(client)

檢查陳述式結果。

    TRY.
        " Example values: iv_statement_id = 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'
        " Handle pagination for large result sets

        DO.
          lo_result_page = lo_rsd->getstatementresult(
            iv_id = iv_statement_id
            iv_nexttoken = lv_next_token
          ).

          " Collect records from this page
          lt_page_records = lo_result_page->get_records( ).
          APPEND LINES OF lt_page_records TO lt_all_records.

          " Check if there are more pages
          lv_next_token = lo_result_page->get_nexttoken( ).
          IF lv_next_token IS INITIAL.
            EXIT. " No more pages
          ENDIF.
        ENDDO.

        " For the last call, set oo_result for return value
        oo_result = lo_result_page.
        lv_record_count = lines( lt_all_records ).
        MESSAGE |Retrieved { lv_record_count } record(s).| TYPE 'I'.
      CATCH /aws1/cx_rsdresourcenotfoundex.
        MESSAGE 'Statement not found or results not available.' TYPE 'I'.
      CATCH /aws1/cx_rsdinternalserverex.
        MESSAGE 'Internal server error.' TYPE 'I'.
    ENDTRY.