Package com.facebook.presto.operator.aggregation

Examples of com.facebook.presto.operator.aggregation.AggregationFunction

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    }

    @SuppressWarnings("rawtypes")
    private static Aggregator createAggregator(AggregationFunctionDefinition functionDefinition, Step step, int expectedGroups)
    {
        AggregationFunction function = functionDefinition.getFunction();
        if (function instanceof VariableWidthAggregationFunction) {
            return new VariableWidthAggregator((VariableWidthAggregationFunction) functionDefinition.getFunction(), functionDefinition.getInputs(), step, expectedGroups);
        }
        else {
            Input input = null;
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        private final int intermediateChannel;

        private Aggregator(AggregationFunctionDefinition functionDefinition, Step step)
        {
            AggregationFunction function = functionDefinition.getFunction();

            if (step != Step.FINAL) {
                int[] argumentChannels = new int[functionDefinition.getInputs().size()];
                for (int i = 0; i < argumentChannels.length; i++) {
                    argumentChannels[i] = functionDefinition.getInputs().get(i).getChannel();
                }
                intermediateChannel = -1;
                aggregation = function.createAggregation(
                        functionDefinition.getMask().transform(Input.channelGetter()),
                        functionDefinition.getSampleWeight().transform(Input.channelGetter()),
                        functionDefinition.getConfidence(),
                        argumentChannels);
            }
            else {
                checkArgument(functionDefinition.getInputs().size() == 1, "Expected a single input for an intermediate aggregation");
                intermediateChannel = functionDefinition.getInputs().get(0).getChannel();
                aggregation = function.createIntermediateAggregation(functionDefinition.getConfidence());
            }
            this.step = step;
        }
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        private final int intermediateChannel;

        private Aggregator(AggregationFunctionDefinition functionDefinition, Step step)
        {
            AggregationFunction function = functionDefinition.getFunction();

            if (step == Step.FINAL) {
                checkArgument(functionDefinition.getInputs().size() == 1, "Expected a single input for an intermediate aggregation");
                intermediateChannel = functionDefinition.getInputs().get(0).getChannel();
                aggregation = function.createGroupedIntermediateAggregation(functionDefinition.getConfidence());
            }
            else {
                int[] argumentChannels = new int[functionDefinition.getInputs().size()];
                for (int i = 0; i < argumentChannels.length; i++) {
                    argumentChannels[i] = functionDefinition.getInputs().get(i).getChannel();
                }
                intermediateChannel = -1;
                aggregation = function.createGroupedAggregation(
                        functionDefinition.getMask().transform(Input.channelGetter()),
                        functionDefinition.getSampleWeight().transform(Input.channelGetter()),
                        functionDefinition.getConfidence(),
                        argumentChannels);
            }
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Related Classes of com.facebook.presto.operator.aggregation.AggregationFunction

  • com.facebook.presto.operator.AggregationOperator
  • com.facebook.presto.operator.AggregationOperator$Aggregator
  • com.facebook.presto.operator.HashAggregationOperator
  • com.facebook.presto.operator.HashAggregationOperator$Aggregator
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