示例#1
0
        //---------------------------------------------------------------------------------------
        // Executes the query and returns the results in an array.
        //

        internal TOutput[] ExecuteAndGetResultsAsArray()
        {
            QuerySettings querySettings =
                SpecifiedQuerySettings
                .WithPerExecutionSettings()
                .WithDefaults();

            QueryLifecycle.LogicalQueryExecutionBegin(querySettings.QueryId);
            try
            {
                Debug.Assert(querySettings.ExecutionMode != null);
                if (querySettings.ExecutionMode.Value == ParallelExecutionMode.Default && LimitsParallelism)
                {
                    IEnumerable <TOutput> opSequential = AsSequentialQuery(querySettings.CancellationState.ExternalCancellationToken);
                    IEnumerable <TOutput> opSequentialWithCancelChecks = CancellableEnumerable.Wrap(opSequential, querySettings.CancellationState.ExternalCancellationToken);
                    return(ExceptionAggregator.WrapEnumerable(opSequentialWithCancelChecks, querySettings.CancellationState).ToArray());
                }

                QueryResults <TOutput> results = GetQueryResults(querySettings);

                // Top-level preemptive cancellation test.
                // This handles situations where cancellation has occurred before execution commences
                // The handling for in-execution occurs in QueryTaskGroupState.QueryEnd()

                if (querySettings.CancellationState.MergedCancellationToken.IsCancellationRequested)
                {
                    querySettings.CancellationState.ExternalCancellationToken.ThrowIfCancellationRequested();
                    throw new OperationCanceledException();
                }

                if (results.IsIndexible && OutputOrdered)
                {
                    // The special array-based merge performs better if the output is ordered, because
                    // it does not have to pay for ordering. In the unordered case, we it appears that
                    // the stop-and-go merge performs a little better.
                    ArrayMergeHelper <TOutput> merger = new ArrayMergeHelper <TOutput>(SpecifiedQuerySettings, results);
                    merger.Execute();
                    TOutput[] output = merger.GetResultsAsArray();
                    querySettings.CleanStateAtQueryEnd();
                    return(output);
                }
                else
                {
                    Debug.Assert(querySettings.TaskScheduler != null);
                    PartitionedStreamMerger <TOutput> merger =
                        new PartitionedStreamMerger <TOutput>(false, ParallelMergeOptions.FullyBuffered, querySettings.TaskScheduler,
                                                              OutputOrdered, querySettings.CancellationState, querySettings.QueryId);
                    results.GivePartitionedStream(merger);
                    Debug.Assert(merger.MergeExecutor != null);
                    TOutput[]? output = merger.MergeExecutor.GetResultsAsArray();
                    querySettings.CleanStateAtQueryEnd();
                    Debug.Assert(output != null);
                    return(output);
                }
            }
            finally
            {
                QueryLifecycle.LogicalQueryExecutionEnd(querySettings.QueryId);
            }
        }
        internal TOutput[] ExecuteAndGetResultsAsArray()
        {
            TOutput[]     localArray3;
            QuerySettings querySettings = base.SpecifiedQuerySettings.WithPerExecutionSettings().WithDefaults();

            QueryLifecycle.LogicalQueryExecutionBegin(querySettings.QueryId);
            try
            {
                if ((((ParallelExecutionMode)querySettings.ExecutionMode.Value) == ParallelExecutionMode.Default) && this.LimitsParallelism)
                {
                    IEnumerable <TOutput> source       = this.AsSequentialQuery(querySettings.CancellationState.ExternalCancellationToken);
                    IEnumerable <TOutput> introduced13 = CancellableEnumerable.Wrap <TOutput>(source, querySettings.CancellationState.ExternalCancellationToken);
                    return(ExceptionAggregator.WrapEnumerable <TOutput>(introduced13, querySettings.CancellationState).ToArray <TOutput>());
                }
                QueryResults <TOutput> queryResults = this.GetQueryResults(querySettings);
                if (queryResults.IsIndexible && this.OutputOrdered)
                {
                    ArrayMergeHelper <TOutput> helper = new ArrayMergeHelper <TOutput>(base.SpecifiedQuerySettings, queryResults);
                    helper.Execute();
                    TOutput[] localArray = helper.GetResultsAsArray();
                    querySettings.CleanStateAtQueryEnd();
                    return(localArray);
                }
                PartitionedStreamMerger <TOutput> recipient = new PartitionedStreamMerger <TOutput>(false, ParallelMergeOptions.FullyBuffered, querySettings.TaskScheduler, this.OutputOrdered, querySettings.CancellationState, querySettings.QueryId);
                queryResults.GivePartitionedStream(recipient);
                TOutput[] resultsAsArray = recipient.MergeExecutor.GetResultsAsArray();
                querySettings.CleanStateAtQueryEnd();
                localArray3 = resultsAsArray;
            }
            finally
            {
                QueryLifecycle.LogicalQueryExecutionEnd(querySettings.QueryId);
            }
            return(localArray3);
        }
示例#3
0
        //---------------------------------------------------------------------------------------
        // Executes the query and returns the results in an array.
        //

        internal TOutput[] ExecuteAndGetResultsAsArray()
        {
            QuerySettings querySettings =
                SpecifiedQuerySettings
                .WithPerExecutionSettings()
                .WithDefaults();

            QueryLifecycle.LogicalQueryExecutionBegin(querySettings.QueryId);
            try
            {
                if (querySettings.ExecutionMode.Value == ParallelExecutionMode.Default && LimitsParallelism)
                {
                    IEnumerable <TOutput> opSequential = AsSequentialQuery(querySettings.CancellationState.ExternalCancellationToken);
                    IEnumerable <TOutput> opSequentialWithCancelChecks = CancellableEnumerable.Wrap(opSequential, querySettings.CancellationState.ExternalCancellationToken);
                    return(ExceptionAggregator.WrapEnumerable(opSequentialWithCancelChecks, querySettings.CancellationState).ToArray());
                }

                QueryResults <TOutput> results = GetQueryResults(querySettings);

                if (results.IsIndexible && OutputOrdered)
                {
                    // The special array-based merge performs better if the output is ordered, because
                    // it does not have to pay for ordering. In the unordered case, we it appears that
                    // the stop-and-go merge performs a little better.
                    ArrayMergeHelper <TOutput> merger = new ArrayMergeHelper <TOutput>(SpecifiedQuerySettings, results);
                    merger.Execute();
                    TOutput[] output = merger.GetResultsAsArray();
                    querySettings.CleanStateAtQueryEnd();
                    return(output);
                }
                else
                {
                    PartitionedStreamMerger <TOutput> merger =
                        new PartitionedStreamMerger <TOutput>(false, ParallelMergeOptions.FullyBuffered, querySettings.TaskScheduler,
                                                              OutputOrdered, querySettings.CancellationState, querySettings.QueryId);
                    results.GivePartitionedStream(merger);
                    TOutput[] output = merger.MergeExecutor.GetResultsAsArray();
                    querySettings.CleanStateAtQueryEnd();
                    return(output);
                }
            }
            finally
            {
                QueryLifecycle.LogicalQueryExecutionEnd(querySettings.QueryId);
            }
        }