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QuestDB is high performance SQL time series database

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.griffin.engine.functions.groupby;

import io.questdb.cairo.map.MapValue;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import org.jetbrains.annotations.NotNull;

public class LastFloatGroupByFunction extends FirstFloatGroupByFunction {

    public LastFloatGroupByFunction(@NotNull Function arg) {
        super(arg);
    }

    @Override
    public void computeNext(MapValue mapValue, Record record, long rowId) {
        computeFirst(mapValue, record, rowId);
    }

    @Override
    public String getName() {
        return "last";
    }

    @Override
    public void merge(MapValue destValue, MapValue srcValue) {
        long srcRowId = srcValue.getLong(valueIndex);
        long destRowId = destValue.getLong(valueIndex);
        if (srcRowId > destRowId) {
            destValue.putLong(valueIndex, srcRowId);
            destValue.putFloat(valueIndex + 1, srcValue.getFloat(valueIndex + 1));
        }
    }
}