io.questdb.griffin.engine.functions.test.TestSumDoubleGroupByFunction Maven / Gradle / Ivy

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 *  Copyright (c) 2019-2020 QuestDB
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package io.questdb.griffin.engine.functions.test;

import io.questdb.cairo.ArrayColumnTypes;
import io.questdb.cairo.ColumnType;
import io.questdb.cairo.map.MapValue;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.engine.functions.DoubleFunction;
import io.questdb.griffin.engine.functions.GroupByFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import org.jetbrains.annotations.NotNull;

public class TestSumDoubleGroupByFunction extends DoubleFunction implements GroupByFunction, UnaryFunction {
    private final Function arg;
    private int valueIndex;

    public TestSumDoubleGroupByFunction(
            int position,
            @NotNull Function arg,
            @NotNull Function value2
    ) {
        super(position);
        // this is just random attempt to create a problem within a function
        value2.getDouble(null);
        this.arg = arg;
    }

    @Override
    public void computeFirst(MapValue mapValue, Record record) {
        mapValue.putDouble(valueIndex, arg.getDouble(record));
    }

    @Override
    public void computeNext(MapValue mapValue, Record record) {
        mapValue.putDouble(valueIndex, mapValue.getDouble(valueIndex) + arg.getDouble(record));
    }

    @Override
    public void pushValueTypes(ArrayColumnTypes columnTypes) {
        this.valueIndex = columnTypes.getColumnCount();
        columnTypes.add(ColumnType.DOUBLE);
    }

    @Override
    public void setDouble(MapValue mapValue, double value) {
        mapValue.putDouble(valueIndex, value);
    }

    @Override
    public void setNull(MapValue mapValue) {
        mapValue.putDouble(valueIndex, Double.NaN);
    }

    @Override
    public double getDouble(Record rec) {
        return rec.getDouble(valueIndex);
    }

    @Override
    public Function getArg() {
        return arg;
    }
}